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Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2018	Feb. 28, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	CECE
Entity Registrant Name	CECO ENVIRONMENTAL CORP
Entity Central Index Key	0000003197
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		34,979,895
Entity Public Float			$ 162.7

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 43,676	$ 29,902
Restricted cash	762	591
Accounts receivable, net	53,225	67,990
Costs and estimated earnings in excess of billings on uncompleted contracts	29,694	33,947
Inventories, net	20,817	20,969
Prepaid expenses and other current assets	10,117	10,760
Prepaid income taxes	1,388	1,930
Assets held for sale	1,186	7,853
Total current assets	160,865	173,942
Property, plant and equipment, net	22,200	23,400
Goodwill	152,156	166,951
Intangible assets – finite life, net	35,959	49,956
Intangible assets – indefinite life	18,258	19,691
Deferred charges and other assets	3,144	4,609
Total assets	392,582	438,549
Current liabilities:
Current portion of debt		11,296
Accounts payable and accrued expenses	80,229	70,786
Billings in excess of costs and estimated earnings on uncompleted contracts	20,144	20,469
Note payable	1,700	5,300
Income taxes payable	1,813
Total current liabilities	103,886	107,851
Other liabilities	26,925	30,382
Debt, less current portion	74,456	103,537
Deferred income tax liability, net	8,755	10,210
Total liabilities	214,022	251,980
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $.01 par value; 10,000 shares authorized, none issued
Common stock, $.01 par value; 100,000,000 shares authorized, 34,953,825 and 34,707,924 shares issued and outstanding at December 31, 2018 and 2017, respectively	349	347
Capital in excess of par value	251,409	248,170
Accumulated loss	(59,427)	(52,673)
Accumulated other comprehensive loss	(13,415)	(8,919)
Stockholders' equity before treasury stock	178,916	186,925
Less treasury stock, at cost, 137,920 shares at December 31, 2018 and 2017	(356)	(356)
Total shareholders’ equity	178,560	186,569
Total liabilities and shareholders’ equity	$ 392,582	$ 438,549

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,953,825	34,707,924
Common Stock, shares outstanding	34,953,825	34,707,924
Treasury stock, shares	137,920	137,920

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 337,339	$ 345,051	$ 417,011
Cost of sales	225,802	231,857	282,152
Gross profit	111,537	113,194	134,859
Selling and administrative expenses	87,462	88,975	81,743
Acquisition and integration expenses			524
Amortization and earnout expenses	9,683	7,132	20,231
Intangible asset and goodwill impairment		7,168	57,923
Loss on divestitures, net of selling costs	4,390
Restructuring expenses		1,895
Income (loss) from operations	10,002	8,024	(25,562)
Other (expense) income, net	(365)	106	310
Interest expense	(7,140)	(6,721)	(7,712)
Income (loss) before income taxes	2,497	1,409	(32,964)
Income tax expense	9,618	4,438	5,290
Net loss	(7,121)	(3,029)	(38,254)
Net loss attributable to noncontrolling interest			(36)
Net loss attributable to CECO Environmental Corp.	$ (7,121)	$ (3,029)	$ (38,218)
Loss per share:
Basic	$ (0.21)	$ (0.09)	$ (1.12)
Diluted	$ (0.21)	$ (0.09)	$ (1.12)
Weighted average number of common shares outstanding:
Basic	34,714,395	34,445,256	33,979,549
Diluted	34,714,395	34,445,256	33,979,549

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (7,121)	$ (3,029)	$ (38,254)
Other comprehensive (loss) income, net of tax:
Translation (loss) income	(3,858)	4,021	(3,864)
Interest rate swap	76	180	312
Minimum pension liability adjustment	(22)	(78)	87
Comprehensive (loss) income	(10,925)	1,094	(41,719)
Net loss attributable to noncontrolling interest			(36)
Comprehensive (loss) income attributable to CECO Environmental Corp.	$ (10,925)	$ 1,094	$ (41,683)

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Divestiture [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Divestiture [Member]	Treasury Stock [Member]	CECO	CECO Divestiture [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2015	$ 245,021		$ 340	$ 243,274	$ 5,472	$ (9,577)		$ (356)	$ 239,153		$ 5,868
Beginning Balance, Shares at Dec. 31, 2015			34,056					(138)
Net loss	(38,254)				(38,218)				(38,218)		(36)
Common stock dividends	(8,995)				(8,995)				(8,995)
Exercise of stock options and dividend reinvestment issuances	$ 1,515		$ 2	1,513					1,515
Exercise of stock options and dividend reinvestment issuances, Shares	195		215
Excess tax benefit from stock options exercised	$ 137			137					137
Restricted stock units issued	(9)			(9)					(9)
Restricted stock units issued, Shares			17
Share based compensation earned	2,458		$ 1	2,457					2,458
Share based compensation earned, Shares			27
Issuance of shares for cashless warrant exercise			$ 1	(1)
Issuance of shares for cashless warrant exercise, Shares			90
Stock repurchase and retirement	(1,238)		$ (1)	(1,237)					(1,238)
Stock repurchase and retirement, Shares			(105)
Noncontrolling interest acquisition	(7,088)			(1,256)					(1,256)		$ (5,832)
Adjustment for minimum pension liability, net of tax	87					87			87
Interest rate swap	312					312			312
Translation income (loss)	(3,864)					(3,864)			(3,864)
Ending Balance at Dec. 31, 2016	190,082		$ 343	244,878	(41,741)	(13,042)		$ (356)	190,082
Ending Balance, Shares at Dec. 31, 2016			34,300					(138)
Translation (loss) gain, beginning balance at Dec. 31, 2015	(4,407)
Translation (loss) gain, ending balance at Dec. 31, 2016	(8,271)
Minimum pension liability adjustment beginning balance at Dec. 31, 2015	(5,170)
Minimum pension liability adjustment, ending balance at Dec. 31, 2016	(5,083)
Accumulated other comprehensive loss, beginning balance at Dec. 31, 2015	(9,577)
Accumulated other comprehensive loss, activity	(3,465)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2016	(13,042)
Interest rate swap adjustment ending balance at Dec. 31, 2016	312
Net loss	(3,029)				(3,029)				(3,029)
Cumulative effect adjustment \| ASU 2016-09 [Member]	66			177	(111)				66
Common stock dividends	(7,792)				(7,792)				(7,792)
Exercise of stock options and dividend reinvestment issuances	$ 1,295		$ 3	1,292					1,295
Exercise of stock options and dividend reinvestment issuances, Shares	292		291
Restricted stock units issued	$ (135)		$ 1	(136)					(135)
Restricted stock units issued, Shares			92
Share based compensation earned	1,959			1,959					1,959
Share based compensation earned, Shares			25
Adjustment for minimum pension liability, net of tax	(78)					(78)			(78)
Interest rate swap	180					180			180
Translation income (loss)	4,021					4,021			4,021
Ending Balance at Dec. 31, 2017	186,569		$ 347	248,170	(52,673)	(8,919)		$ (356)	186,569
Ending Balance, Shares at Dec. 31, 2017			34,708					(138)
Translation (loss) gain, ending balance at Dec. 31, 2017	(4,250)
Minimum pension liability adjustment, ending balance at Dec. 31, 2017	(5,161)
Accumulated other comprehensive loss, activity	4,123
Accumulated other comprehensive loss, ending balance at Dec. 31, 2017	(8,919)
Interest rate swap adjustment ending balance at Dec. 31, 2017	492
Net loss	(7,121)				(7,121)				(7,121)
Cumulative effect adjustment \| ASU 2018-02 [Member]	(30)				1,037	(1,067)			(30)
Cumulative effect adjustment \| ASU 2014-09 [Member]	(622)				(622)				(622)
Cumulative translation adjustment for divestiture		$ 375					$ 375			$ 375
Translation (loss) gain, cumulative translation adjustment		375
Minimum pension liability adjustment, cumulative translation adjustment \| ASU 2018-02 [Member]	(1,062)
Accumulated other comprehensive loss, cumulative translation adjustment		$ 375
Accumulated other comprehensive loss, cumulative translation adjustment \| ASU 2018-02 [Member]	(1,067)
Adjustment for interest rate swap, net of tax \| ASU 2018-02 [Member]	(5)
Exercise of stock options and dividend reinvestment issuances	$ 89			89					89
Exercise of stock options and dividend reinvestment issuances, Shares	16		16
Restricted stock units issued	$ (253)		$ 2	(207)	48				(253)
Restricted stock units issued, Shares			192
Share based compensation earned	3,357			3,357					3,357
Share based compensation earned, Shares			38
Adjustment for minimum pension liability, net of tax	(22)					(22)			(22)
Interest rate swap	76					76			76
Translation income (loss)	(3,858)					(3,858)			(3,858)
Ending Balance at Dec. 31, 2018	178,560		$ 349	$ 251,409	$ (59,427)	$ (13,415)		$ (356)	$ 178,560
Ending Balance, Shares at Dec. 31, 2018			34,954					(138)
Translation (loss) gain, ending balance at Dec. 31, 2018	(7,733)
Minimum pension liability adjustment, ending balance at Dec. 31, 2018	(6,245)
Accumulated other comprehensive loss, activity	(3,804)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2018	(13,415)
Interest rate swap adjustment ending balance at Dec. 31, 2018	$ 563

Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Stockholders Equity [Abstract]
Adjustment for minimum pension liability, tax	$ 17	$ 48	$ 53
Adjustment for interest rate swap liability, tax	$ 111	$ 103	$ 181

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (7,121)	$ (3,029)	$ (38,254)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	13,272	16,088	18,903
Unrealized foreign currency loss (gain)	836	(2,103)	777
Net (gain) loss on interest rate swaps	(276)	(327)	95
Impairment of property and equipment	300	695
Impairment of intangible assets and goodwill		7,168	57,923
Fair value adjustments to earnout liabilities	(330)	(6,610)	4,218
Earnout payments	(2,862)	(7,797)
Loss on sale of property and equipment	(217)	130	217
Loss on divestitures	4,390
Amortization of debt discount	1,143	1,033	1,054
Share based compensation expense	3,187	1,768	2,280
Bad debt expense	1,357	3,895	848
Inventory reserve expense	519	240	1,167
Excess tax benefit from stock options exercised			(137)
Deferred income tax benefit	(42)	(3,123)	(3,750)
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Accounts receivable	(6,084)	14,107	13,294
Cost and estimated earnings of billings on uncompleted contracts	(4,557)	6,232	2,537
Inventories	(1,704)	887	9,449
Prepaid expenses and other current assets	773	3,530	(2,218)
Deferred charges and other assets	(416)	1,585	(73)
Accounts payable and accrued expenses	21,321	(15,847)	(6,593)
Billings in excess of costs and estimated earnings on uncompleted contracts	70	(15,186)	7,440
Income taxes payable	1,839	(1,827)	143
Other liabilities	(3,446)	5,061	279
Net cash provided by operating activities	21,952	6,570	69,599
Cash flows from investing activities:
Acquisitions of property and equipment	(3,090)	(1,028)	(1,076)
Net cash proceeds from divestitures	35,052
Payoff of loans on life insurance policies			(987)
Net proceeds from sale of assets	6,296	368	657
Net cash provided by (used in) investing activities	38,258	(660)	(1,406)
Cash flows from financing activities:
Net (repayments) borrowings on revolving credit lines	(3,723)	2,269	(13,407)
Repayments of long-term debt	(41,356)	(11,168)	(41,768)
Deferred financing fees paid		(692)
Earnout payments		(7,396)	(9,270)
Proceeds from sale-leaseback transactions	800		14,244
Payments on capital leases and sale-leaseback financing liability	(675)	(711)	(426)
Proceeds from employee stock purchase plan, exercise of stock options, and dividend reinvestment plan	54	1,352	1,685
Cash paid for repurchase of common shares			(188)
Excess tax benefit from stock options exercised			137
Dividends paid to common shareholders		(7,792)	(8,995)
Net cash used in financing activities	(44,900)	(24,138)	(57,988)
Effect of exchange rate changes on cash and cash equivalents	(1,531)	881	(1,712)
Net increase (decrease) in cash, cash equivalents and restricted cash	13,779	(17,347)	8,493
Cash, cash equivalents and restricted cash at beginning of year	30,659	48,006	39,513
Cash, cash equivalents and restricted cash at end of year	44,438	30,659	48,006
Non-cash transactions
Property, plant and equipment acquired under capital leases			4,385
Noncontrolling interest acquired through an issuance of a note payable (See Note 16)			5,300
Earnout settled through an exchange of accounts receivable			3,272
Accrual of share repurchase			1,050
Cash paid during the year for:
Interest	5,559	5,686	6,923
Income taxes	$ 10,205	$ 3,048	$ 6,415

Nature of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Nature of Business and Summary of Significant Accounting Policies

1.	Nature of Business and Summary of Significant Accounting Policies

Nature of business— CECO Environmental Corp. and its consolidated subsidiaries (“CECO,” the “Company,” “we,” “us,” or “our”) is a global leader in industrial air quality and fluid handling serving the energy, industrial and other niche markets through an attractive asset-light business model. CECO provides innovative technology and application expertise that helps companies grow their businesses with safe, clean, and more efficient solutions to help protect our shared environment. CECO serves both established and emerging industries in regions around the world working to improve air quality, optimize the energy value chain, and provide customized engineered solutions in multiple applications that include oil and gas, power generation, water and wastewater, battery production, poly silicon fabrication, chemical and petrochemical processing, along with a wide range of other industries.

Principles of consolidation—Our consolidated financial statements include the Company and its controlled subsidiaries. All intercompany balances and transactions have been eliminated.

Unless indicated, all balances within tables are in thousands except per share amounts.

Use of estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Cash equivalents—We consider all highly liquid investments with original maturities of three months or less to be cash equivalents. At December 31, 2018 and 2017, Restricted Cash is cash in support of letters of credit issued by various foreign subsidiaries of the Company. The Company occasionally enters into letters of credit with durations in excess of one year.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Statements of Cash Flows.

	December 31,
	2018		2017
Cash and cash equivalents	$	43,676	$	29,902
Restricted cash		762		591
Restricted cash included within deferred charges and other assets		—		166
Total cash, cash equivalents and restricted cash	$	44,438	$	30,659

Accounts Receivable—Receivables are generally uncollateralized customer obligations due under normal terms requiring payment generally within 30 days from the invoice date unless otherwise determined by specific contract terms, generally due to retainage provisions. The Company’s estimate of the allowance for doubtful accounts for trade receivables is primarily determined based upon the length of time that the receivables are past due. In addition, management estimates are used to determine probable losses based upon an analysis of prior collection experience, specific account risks and economic conditions. Accounts are deemed uncollectible based on past account experience and the current financial condition of the account.

Inventories—The Company’s inventory is valued at the lower of cost or net realizable value, using the first-in, first-out inventory costing method. Inventory quantities are regularly reviewed and provisions for excess or obsolete inventory are recorded based on the Company’s forecast of future demand and market conditions. Significant unanticipated changes to the Company’s forecasts could require a change in the provision for excess or obsolete inventory.

Assets Held for Sale—The Company classifies properties as held for sale when certain criteria are met. At such time, the properties, including significant assets that are expected to be transferred as part of a sale transaction, are presented separately on the consolidated balance sheet at the lower of carrying value or estimated fair value less costs to sell and depreciation is no longer recognized. Assets classified as held for sale included buildings, tracts of land and equipment.

Property, plant and equipment—Property, plant and equipment are carried at the cost of acquisition or construction and depreciated over the estimated useful lives of the assets. Depreciation and amortization are provided using the straight-line method in amounts sufficient to amortize the cost of the assets over their estimated useful lives (buildings and improvements—generally five to 40 years; machinery and equipment—generally two to 15 years). Upon sale or disposal of property, plant and equipment, the applicable amounts of asset cost and accumulated depreciation are removed from the accounts, and the net amount, less any proceeds from sale, is recorded in income.

Intangible assets— Indefinite life intangible assets are comprised of tradenames, while finite life intangible assets are comprised of technology, customer lists, noncompetition agreements and tradenames. Finite life intangible assets are amortized on a straight line or accelerated basis over their estimated useful lives of seven to 10 years for technology, five to 20 years for customer lists, five years for noncompetition agreements and 10 years for tradenames.

Long-lived assets—Property, plant and equipment and finite life intangible assets are reviewed whenever events or changes in circumstances occur that indicate possible impairment. If events or changes in circumstances occur that indicate possible impairment, our impairment review is based on an undiscounted cash flow analysis at the lowest level at which cash flows of the long-lived assets are largely independent of other groups of our assets and liabilities. This analysis requires management judgment with respect to changes in technology, the continued success of product lines, and future volume, revenue and expense growth rates. We conduct annual reviews for idle and underutilized equipment, and review business plans for possible impairment. Impairment occurs when the carrying value of the assets exceeds the future undiscounted cash flows expected to be earned by the use of the asset or asset group. When impairment is indicated, the estimated future cash flows are then discounted to determine the estimated fair value of the asset or asset group and an impairment charge is recorded for the difference between the carrying value and the estimated fair value.

Additionally, the Company evaluates the remaining useful life each reporting period to determine whether events and circumstances warrant a revision to the remaining period of depreciation or amortization. If the estimate of a long-lived asset’s remaining useful life is changed, the remaining carrying amount of the asset is amortized prospectively over that revised remaining useful life.

The Company completes an annual (or more often if circumstances require) impairment assessment of its indefinite life intangible assets. As a part of its annual assessment, typically, the Company first qualitatively assesses whether current events or changes in circumstances lead to a determination that it is more likely than not (defined as a likelihood of more than 50 percent) that the fair value of an asset is less than its carrying amount. If there is a qualitative determination that the fair value of a particular asset is more likely than not greater than its carrying value, we do not need to proceed to the quantitative estimated fair value test for that asset. If this qualitative assessment indicates a more likely than not potential that the asset may be impaired, the estimated fair value is determined by the relief from royalty method. If the estimated fair value of an asset is less than its carrying value, an impairment charge is recorded for the amount by which the carrying value of the asset exceeds its estimated fair value.

Goodwill—The Company completes an annual (or more often if circumstances require) impairment assessment on October 1 of its goodwill on a reporting unit level, at or below the operating segment level. As a part of its annual assessment, the Company first qualitatively assesses whether current events or changes in circumstances lead to a determination that it is more likely than not (defined as a likelihood of more than 50 percent) that the fair value of a reporting unit is less than its carrying amount. If there is a qualitative determination that the fair value of a particular reporting unit is more likely than not greater than its carrying value, the Company does not need to quantitatively test for goodwill impairment for that reporting unit. If this qualitative assessment indicates a more likely than not potential that the asset may be impaired, the estimated fair value is determined using a weighting of the income method and the market method. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recorded.

Deferred charges—Deferred charges include deferred financing costs, which are amortized to interest expense over the life of the related loan. The Company incurred and capitalized $0.7 million of deferred financing fees in 2017 related to long-term debt modifications. Amortization expense was $1.1 million, $1.0 million and $1.1 million for 2018, 2017 and 2016, respectively. As of December 31, 2018 and 2017, remaining capitalized deferred financing costs of $1.7 million and $2.8 million, respectively, are included as a discount to debt in the accompanying Consolidated Balance Sheets.

Revenue recognition

Energy Solutions and Industrial Solutions Segments—Within the Energy Solutions and Industrial Solutions segments, a significant portion of our revenue is derived from fixed-price contracts. We account for a contract after it has been approved by all parties to the arrangement, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

For each contract, we assess the goods and services promised to a customer and identify a performance obligation for each distinct promised good or service. The typical life of our contracts is generally less than 12 months and each contract generally contains only one performance obligation, to provide goods or services to the customer. We determine the transaction price for each contract based on the consideration we expect to receive for the products or services being provided under the contract.

We recognize revenue as performance obligations are satisfied and the customer obtains control of the products and services. A significant amount of our revenue within the Energy Solutions and Industrial Solutions segments is recognized over a period of time as we perform under the contract because control of the work in process transfers continuously to the customer. For performance obligations to deliver products with continuous transfer of control to the customer, revenue is recognized based on the extent of progress towards completion of the performance obligation. Progress is measured based on the ratio of costs incurred to date to the total estimated costs to complete the performance obligation. For these contracts, the cost-to-cost measure best depicts the continuous transfer of goods or services to the customer.

For contracts where the duration is short, total contract revenue is insignificant, or control does not continuously transfer to the customer, revenues are recognized at the point in time control passes to the customer, which occurs generally upon shipment of product.

Progress payments are generally made over the duration of the contract. Shipping and handling activities after control of the products has transferred to the customer are considered fulfillment activities. Sales taxes are recorded on a net basis.

Fluid Handling Solutions Segments—Within the Fluid Handling Solutions segment, a significant portion of our revenue is primarily derived from sales of inventory product and is recognized at the point in time control passes to the customer, which occurs generally upon shipment of the product.

Payments vary by customer but are typically due within 30 days. Shipping and handling activities after control of the products has transferred to the customer are considered fulfillment activities. Sales taxes are recorded on a net basis.

Contract Assets and Contract Liabilities — Contract assets consist of costs and earnings in excess of billings, costs incurred for contracts recognized at a point in time, and retainage. Costs and earnings in excess of billings represent the estimated value of unbilled work for contracts with performance obligations recognized over time and are separately classified as current assets in the Consolidated Balance Sheets. Costs incurred for contracts recognized at a point in time are classified within inventories as work-in-process. Retainage represents a portion of the contract billings that have been billed, but for which the contract allows the customer to retain a portion of the billed amount until final settlement. Retainage is not considered to be a significant financing component because the intent is to protect the customer. Retainage is classified within accounts receivable and deferred charges and other depending on when it is due. Almost all of the Company’s contract assets are classified as current assets in the Consolidated Balance Sheets.

Billings in excess of costs and estimated earnings on uncompleted contracts are current liabilities, which relate to fixed-price contracts recognized over time, and represents payments in advance of performing the related contract work. Billings in excess of costs and estimated earnings on uncompleted contracts is not considered to be a significant financing component because it is generally used to meet working capital demands that can be higher in the early stages of a contract. Contract liabilities, classified in accounts payable and accrued expenses in the Consolidated Balance Sheets, include advance payments received from customers for which revenue has not been recognized for contracts where revenue is recognized at a point in time. Contract liabilities are reduced when the associated revenue from the contract is recognized, which is generally within one year.

The revenue streams within the Company are consistent with those disclosed for our reportable segments. For descriptions of our product offerings and segments, see Note 18— Business Segment Information.

Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Changes to job performance, job conditions, and estimated profitability may result in revisions to contract revenue and costs and are recognized in the period in which the revisions are made. There was no provision for estimated losses on uncompleted contracts at December 31, 2018 and 2017.

Cost of sales—Cost of sales amounts include materials, direct labor and associated benefits, inbound freight charges, purchasing and receiving, inspection, warehousing, and depreciation.

Claims—Change orders arise when the scope of the original project is modified for any of a variety of reasons. The Company will negotiate the extent of the modifications, its expected costs and recovery with the customer. Costs related to change orders are added to the expected total cost of the project. In cases where contract revenues are assured beyond a reasonable doubt to be increased in excess of the expected costs of the change order, incremental profit also is recognized on the contract. Such assurance is generally only achieved when the customer approves in writing the scope and pricing of the change order. Change orders that are in dispute are effectively handled as claims.

Claims are amounts in excess of the agreed contract price that the Company seeks to collect from customers or others for customer-caused delays, errors in specifications and designs, contract terminations, change orders in dispute or unapproved as to both scope and price. Costs attributable to claims are treated as contract costs as incurred.

The Company recognizes certain significant claims for recovery of incurred costs when it is probable that the claim will result in additional contract revenue and when the amount of the claim can be reliably estimated. When the customer or other parties agree in writing to the amount of the claim to be recovered by the Company, the amount of the claim becomes contractual and is accounted for as an increase in the contract’s total estimated revenue and estimated cost. As actual costs are incurred and revenues are recognized over time, a corresponding percentage of the revised total estimated profit will therefore be recognized.

Should it become probable that the claim will not result in additional contract revenue, the Company removes the related contract revenues from its previous estimate of total revenues, which effectively reduces the estimated profit margin on the job and negatively impacts profit for the period.

Pre-contract costs—Pre-contract costs are not significant and are primarily internal costs. As most of the Company’s contracts are one year of less, the Company expenses all pre-contract costs as incurred regardless of whether or not the bids are successful. A majority of our business is obtained through a bidding process and this activity is on-going with multiple bids in process at any one time. These costs consist primarily of engineering, sales and project manager wages, fringes and general corporate overhead and it is deemed impractical to track activities related to any one specific contract.

Selling and administrative expenses—Selling and administrative expenses on the Consolidated Statements of Operations include sales and administrative wages and associated benefits, selling and office expenses, professional fees, bad debt expense and depreciation. Selling and administrative expenses are charged to expense as incurred.

Acquisition and integration expenses—Acquisition and integration expenses on the Consolidated Statements of Operations are related to acquisition activities, which include retention, legal, accounting, banking, and other expenses.

Amortization and earnout expenses—Amortization and earnout expenses on the Consolidated Statements of Operations include amortization of intangible assets, and changes to earnout and contingent compensation amounts related to acquisitions as more fully presented and described in Note 8.

Restructuring expenses—Restructuring expense on the Consolidated Statements of Operations include expenses related to a restructuring program implemented during the fourth quarter of 2017 to reduce operating costs in the future. Within restructuring expenses are charges related to severance, facility exit, legal and property, plant and equipment impairment. The Company’s policy is to recognize restructuring expenses in accordance with the accounting rules related to exit or disposal activities.

Product Warranties—The Company’s warranty reserve is to cover the products sold. The warranty accrual is based on historical claims information. The warranty reserve is reviewed and adjusted as necessary on a quarterly basis and is presented within Note 8.

Research and Development—Although not technically defined as research and development, a significant amount of time, effort and expense is devoted to (a) custom engineering which qualifies products for specific customer applications, (b) developing proprietary process technology and (c) partnering with customers to develop new products.

Income Taxes—Income taxes are determined using the asset and liability method of accounting for income taxes in accordance with Financial Accounting Standards Board (“FASB”), ASC Topic 740, “Income Taxes”. Income tax expense includes federal, state and foreign income taxes.

Deferred income taxes are provided using the asset and liability method whereby deferred tax assets are recognized for deductible temporary differences and operating loss and tax credit carry-forwards and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases and are measured using enacted tax rates expected to apply to taxable income in the year in which those temporary differences are expected to be recovered or settled. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. Tax credits and other incentives reduce income tax expense in the year the credits are claimed.

Management must assess the need to accrue or disclose uncertain tax positions for proposed potential adjustments from various federal, state and foreign tax authorities who regularly audit the Company in the normal course of business. In making these assessments, management must often analyze complex tax laws of multiple jurisdictions, including many foreign jurisdictions. The accounting guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Company records the related interest expense and penalties, if any, as tax expense in the tax provision.

The company has made an accounting policy election to record the U.S. income tax effect of future global intangible low-taxed income (“GILTI”) inclusions in the period in which they arise, rather than establishing deferred taxes with respect to the expected future tax liabilities associated with future GILTI inclusion.

Certain of the Company’s undistributed earnings of its foreign subsidiaries are not permanently reinvested. A liability has been recorded for the deferred taxes on such undistributed foreign earnings. The amount is attributable primarily to the foreign withholding taxes that would become payable should the Company repatriate cash held in its foreign operations.

Earnings per share—The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share for 2018, 2017 and 2016.

	For the Year Ended December 31
	2018			2017			2016
(Table only in thousands)
Numerator (for basic and diluted earnings per share)
Net loss	$	(7,121	)	$	(3,029	)	$	(38,218	)

Denominator
Basic weighted-average shares outstanding		34,714			34,445			33,980
Common stock equivalents arising from stock options and restricted stock awards		—			—			—
Diluted weighted-average shares outstanding		34,714			34,445			33,980

Options and unvested restricted stock units are included in the computation of diluted earnings per share using the treasury stock method. For 2018, 2017 and 2016, outstanding options and unvested restricted stock units of 0.8 million, 0.7 million and 1.6 million, respectively, were excluded from the computation of diluted earnings per share due to their having an anti-dilutive effect.

Once a restricted stock award vests, it is included in the computation of weighted average shares outstanding for purposes of basic and diluted earnings per share.

Foreign Currency Translation—The functional currencies of the Company’s foreign subsidiaries are their local currencies and their books and records are maintained in the local currency. The assets and liabilities of these foreign subsidiaries are translated into United States Dollars (“USD”) based on the end-of period exchange rates and the resultant translation adjustments are reported in Accumulated Other Comprehensive Loss in Shareholders’ equity on the Consolidated Balance Sheets.

Income and expenses are translated into USD at average exchange rates in effect during the period.

Transactions denominated in other than the local currency are remeasured into the local currency and the resulting exchange gains or losses are included in “Other income (expense), net” line of the Consolidated Statements of Operations. Transaction gains were $0.7 million, $0.1 million and $0.7 million in 2018, 2017 and 2016, respectively.

New Financial Accounting Pronouncements

Accounting Standards Adopted in 2018

In March 2018, the FASB issued Accounting Standards Update (“ASU”) 2018-05, “Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118.” The standard relates to the accounting and disclosures around the issuance of the SEC’s Staff Accounting Bulletin No. 118, “Income Tax Accounting Implications of the Tax Cuts and Jobs Act” (“SAB 118”), which the Company has adopted. See Note 14 – Income Taxes for the disclosures related to this amended guidance.

In February 2018, the FASB issued ASU No. 2018-02, “Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The standard allows for reclassification of stranded tax effects on items resulting from the Tax Cuts and Jobs Act (the “Tax Act”) from accumulated other comprehensive income to retained earnings. Tax effects unrelated to the Tax Act are released from accumulated other comprehensive income based on the nature of the underlying item. The Company adopted this ASU in the first quarter of 2018, under the prospective method resulting in accumulated loss in the Consolidated Balance Sheets decreasing by approximately $1.1 million, with a corresponding increase in accumulated other comprehensive loss in the Consolidated Balance Sheets due to the reduction in the federal income tax rate from 35% to 21%. See Note 14 — Income Taxes for additional information about the Tax Act.

In May 2017, the FASB issued ASU 2017-09, “Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting.” ASU 2017-09 clarifies when changes to the terms or conditions of a share-based award must be accounted for as a modification. We adopted ASU 2017-09 on January 1, 2018, under the prospective method. The adoption had no impact on our consolidated financial statements as there were no events requiring management to evaluate for a potential modification to a share-based payment award.

In March 2017, the FASB issued ASU 2017-07, “Compensation – Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” Under existing GAAP, an entity is required to present all components of net periodic pension cost and net periodic postretirement benefit cost aggregated as a net amount in the income statement, and this net amount may be capitalized as part of an asset where appropriate. ASU 2017-07 requires that the service cost component is reported in the same line item or items as other compensation costs arising from services rendered by the employees during the period, and requires the other components of net periodic pension cost and net periodic postretirement benefit cost to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. We adopted ASU 2017-07 on January 1, 2018, under the retrospective method for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the income statement and prospectively, on and after the effective date, for the capitalization of the service cost component of net periodic pension cost and net periodic postretirement benefit in assets. The adoption resulted in reclassification of the other components of net periodic pension cost outside of operating income the impact of which was not material. See Note 11 – Pension and Employee Benefit Plans for additional disclosures related to the adoption of the standard.

In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. We adopted ASU 2017-01 on January 1, 2018, under the prospective method. The adoption of the standard’s definition of a business was followed for the Company’s 2018 divestitures. The divestitures would have been considered a business both before and after the adoption of the standard and, therefore, the provisions of ASU 2017-01 did not have a material effect on the Company’s consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” ASU 2016-18 requires the change during the period in the total of cash, cash equivalents, and restricted cash to be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. We adopted ASU 2016-18 on January 1, 2018, under the retrospective method. The prior year statement of cash flows has been reclassified to conform with the standard. The impact of the adoption was not material to the Company. The adoption resulted in the Company classifying restricted cash in Cash, Cash Equivalents and Restricted Cash in the Consolidated Statements of Cash Flows for each period presented.

In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 provides guidance on how certain cash receipts and cash payments are presented and classified in the statement of cash flows. We adopted ASU 2016-15 on January 1, 2018, under the retrospective method. The adoption resulted in the reclassification of $1.0 million payoff of loans on life insurance policies in the 2016 Statement of Cash Flows from financing activities to investing activities.

In May 2014, the FASB issued ASU 2014-09, “Revenue From Contracts With Customers.” ASU 2014-09 supersedes nearly all existing revenue recognition principles under GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration an entity expects to be entitled to for those goods or services using a defined five-step process. In 2016, the FASB issued accounting standards updates to address implementation issues and to clarify the guidance for identifying performance obligations, licenses and determining if a company is the principal or agent in a revenue arrangement.

We adopted ASU 2014-09 on January 1, 2018, under the modified retrospective method where the cumulative effect is recognized through retained earnings as of the date of adoption. Under the new standard, certain contract arrangements that were historically recognized over time under our previous policies will now be recognized at a point in time upon completion of the contracts. Based on the Company’s evaluation of existing contracts that were not substantially complete as of January 1, 2018, the $0.6 million cumulative effect adjustment to the opening balance of retained earnings is reflected in the Consolidated Statement of Shareholders’ Equity. See Note 1—Nature of Business and Summary of Significant Accounting Policies for details on our accounting policies under the new standard.

Accounting Standards Yet to be Adopted

In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans,” that makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The new guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and requires new ones that the FASB considers pertinent. ASU 2018-14 is effective for us January 1, 2021. We are evaluating the impact of the adoption of ASU 2018-14 on our consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 expands an entity’s ability to apply hedge accounting for nonfinancial and financial risk components and allows for a simplified approach for fair value hedging of interest rate risk. ASU 2017-12 eliminates the need to separately measure and report hedge ineffectiveness and generally requires the entire change in fair value of a hedging instrument to be presented in the same income statement line as the hedged item. Additionally, ASU 2017-12 simplifies the hedge documentation and effectiveness assessment under the previous guidance. We will adopt the standard on January 1, 2019. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, “Leases,” which, together with its related clarifying ASUs, provides revised guidance for lease accounting and related disclosure requirements and establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition. This guidance is effective for us on January 1, 2019. We will adopt the standard using the modified retrospective method which will be applied to leases that exist or are entered into on or after January 1, 2019. The Company will elect to utilize the package of practical expedients that allows entities to 1) not reassess whether any expired or existing contracts are or contain leases, 2) retain the existing classification of lease contracts as of the date of adoption, and 3) not reassess initial direct costs for any existing leases. The Company is in the final stages of evaluating its existing lease portfolio and is continuing to assess and quantify the amount of ROU assets and lease liabilities that will be included on its balance sheet as of January 1, 2019. The Company is finalizing its implementation of a new lease accounting and administration software solution to manage and account for leases under the new guidance and is updating certain of its business processes and internal controls to meet the reporting and disclosure requirements of the new standard. We believe that the new standard will have a material impact on our consolidated balance sheet due to the recognition of ROU assets and liabilities for our operating leases, but it is not expected to have a material impact on our statement of operations or liquidity. The ASU will also require disclosures to allow financial statement users to better understand the amount, timing and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative requirements, providing additional information about the amounts recorded in the financial statements. Our leasing activity is primarily related to buildings as well as various sale-leaseback transactions.

Financial Instruments

12 Months Ended

Dec. 31, 2018

Investments All Other Investments [Abstract]

Financial Instruments

2.	Financial Instruments

Our financial instruments consist primarily of cash and cash equivalents, receivables and certain other assets, foreign debt, and accounts payable, which approximate fair value at December 31, 2018 and 2017, due to their short-term nature or variable, market-driven interest rates.

The fair value of the debt issued under the Credit Agreement was $76.1 million and $114.9 million at December 31, 2018 and 2017, respectively. The fair value of the note payable was $1.7 million and $5.3 million at December 31, 2018 and 2017, respectively. The fair value was determined considering market conditions, our credit worthiness and the current terms of our debt.

In accordance with the terms of the Credit Agreement, the Company entered into an interest rate swap on December 30, 2015 to hedge against interest rate exposure related to a portion of the outstanding debt indexed to LIBOR market rates. See Note 9 for further information regarding the interest rate swap.

At December 31, 2018 and 2017, the Company had cash and cash equivalents of $43.7 million and $29.9 million, respectively, of which $23.3 million and $19.7 million, respectively, was held outside of the United States, principally in the Netherlands, United Kingdom, China, and Canada.

Concentrations of credit risk:

Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents, and accounts receivable. We maintain cash and cash equivalents with various major financial institutions. We perform periodic evaluations of the financial institutions in which our cash is invested. Concentrations of credit risk with respect to trade and contract receivables are limited due to the large number of customers and various geographic areas. Additionally, we perform ongoing credit evaluations of our customers’ financial condition.

Accounts Receivable

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

Accounts Receivable

3.Accounts Receivable

Accounts receivable consisted of the following:

	December 31,
(Table only in thousands)	2018			2017
Trade receivables	$	7,296		$	11,603
Contract receivables		48,826			60,543
Allowance for doubtful accounts		(2,897	)		(4,156	)
Total accounts receivable	$	53,225		$	67,990

Balances billed, but not paid by customers under retainage provisions in contracts that are recorded in deferred charges and other assets within the Consolidated Balance Sheets, amounted to approximately $0.9 million and $2.5 million at December 31, 2018 and 2017, respectively. Retainage receivables on contracts in progress are generally collected within a year or two subsequent to contract completion.

Provision for doubtful accounts was $1.4 million, $3.9 million and $0.8 million during 2018, 2017 and 2016, respectively, while accounts charged to the allowance were $0.8 million, $1.5 million and $0.3 million during 2018, 2017 and 2016, respectively.

In 2018, the divestitures impacted contract receivables by $22.2 million as well as $1.2 million on the allowance for doubtful accounts.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Costs and Estimated Earnings on Uncompleted Contracts

12 Months Ended

Dec. 31, 2018

Text Block [Abstract]

Costs and Estimated Earnings on Uncompleted Contracts

4.	Costs and Estimated Earnings on Uncompleted Contracts

Our contracts have various lengths to completion ranging from a few days to several months. We anticipate that a majority of our current contracts will be completed within the next 12 months and any unrecognized billings will be recorded as revenue in that same period. A significant amount of our revenue within the Energy Solutions and Industrial Solutions segments is recognized over a period of time as we perform under the contract because control of the work in process transfers continuously to the customer. The assets and liabilities recognized in association with these contracts are as follows:

	December 31,
(Table only in thousands)	2018			2017
Costs incurred on uncompleted contracts	$	174,168		$	169,665
Estimated earnings		67,427			61,556
Total costs and estimated earnings on uncompleted contracts, gross		241,595			231,221
Less billings to date		(232,045	)		(217,743	)
Total costs and estimated earnings on uncompleted contracts, net	$	9,550		$	13,478
Included in the accompanying consolidated balance sheets under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	29,694		$	33,947
Billings in excess of costs and estimated earnings on uncompleted contracts		(20,144	)		(20,469	)
Total costs and estimated earnings on uncompleted contracts, net	$	9,550		$	13,478

Inventories

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories

5.	Inventories

Inventories consisted of the following:

	December 31,
(Table only in thousands)	2018			2017
Raw materials	$	15,819		$	18,444
Work in process		6,098			3,182
Finished goods		807			940
Obsolescence allowance		(1,907	)		(1,597	)
Total inventories	$	20,817		$	20,969

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.5 million, $0.2 million and $1.2 million during 2018, 2017 and 2016, respectively. Items charged to the allowance for inventory write-offs were $0.3 million, $0.6 million and $0.2 million, during 2018, 2017 and 2016, respectively.

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Property, Plant and Equipment

6.	Property, Plant and Equipment

	December 31,
(Table only in thousands)	2018			2017
Land	$	1,623		$	1,627
Building and improvements		18,185			18,063
Machinery and equipment		25,257			25,068
Property, plant and equipment, gross		45,065			44,758
Less accumulated depreciation		(22,865	)		(21,358	)
Property, plant and equipment, net	$	22,200		$	23,400

Depreciation expense was $3.5 million, $4.5 million and $5.0 million for 2018, 2017 and 2016, respectively.

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

7.	Goodwill and Intangible Assets

(Table only in thousands)	Energy Solutions segment			Industrial Solutions segment		Fluid Handling segment			Totals
Balance of goodwill at December 31, 2016	$	101,610		$	22,419	$	46,124		$	170,153
Impairment charge		(4,443	)		—		—			(4,443	)
Foreign currency translation		1,241			—		—			1,241
Balance of goodwill at December 31, 2017		98,408			22,419		46,124			166,951
Divestitures		—			—		(14,317	)		(14,317	)
Foreign currency translation		(478	)		—		—			(478	)
Balance of goodwill at December 31, 2018	$	97,930		$	22,419	$	31,807		$	152,156

As of December 31, 2018 and 2017, the Company has an aggregate amount of goodwill acquired of $212.8 million and $242.3 million, respectively, and an aggregate amount of impairment losses of $60.7 million and $75.3 million, respectively.

The Company’s indefinite lived intangible assets as of December 31, 2018 and 2017 consisted of the following:

	Tradenames
(Table only in thousands)	2018			2017
Balance beginning of year	$	19,691		$	22,042
Impairment charge		—			(2,725	)
Divestitures		(1,340	)		—
Foreign currency adjustments		(93	)		374
Balance end of year	$	18,258		$	19,691

The Company completes an annual (or more often if circumstances require) impairment assessment of its goodwill and indefinite life intangible assets on October 1 at the reporting unit level.

The Company bases its measurement of the fair value of a reporting unit using a 50/50 weighting of the income method and the market method. The income method is based on a discounted future cash flow approach that uses the significant assumptions of projected revenue, projected operational profit, terminal growth rates, and the cost of capital. Projected revenue and operational profit, and terminal growth rates were determined to be significant assumptions because they are three primary drivers of the projected cash flows in the discounted future cash flow approach. Cost of capital was also determined to be a significant assumption as it is the discount rate used to calculate the current fair value of those projected cash flows. The market method is based on financial multiples of comparable companies and applies a control premium. Significant estimates in the market approach include identifying similar companies with comparable business factors such as size, growth, profitability, risk and return on investment and assessing comparable revenue and operating income multiples in estimating the fair value of a reporting unit.

In 2018, because of changes in management and the subsequent changes to the Company’s reporting and operating structure, the number of our reporting units was aggregated to three reporting units from 11 prior to the change. Prior to the adoption of the new reporting structure we tested our goodwill impairment under the old reporting unit structure. Based on this analysis, the estimated fair value of all of our reporting units exceeded their carrying value as of October 1, 2018.

There was no goodwill impairment in 2018. There was goodwill impairment of $4.4 million and $53.8 in 2017 and 2016, respectively.

The Company also performed an impairment analysis for all reporting units with indefinite life intangible assets as of October 1, 2018. The Company based its measurement of the fair value of the indefinite life intangible assets utilizing the relief from royalty method. The significant assumptions used under the relief from royalty method are projected revenue, royalty rates, terminal growth rates, and the cost of capital. Projected revenue, royalty rates and terminal growth rates were determined to be significant assumptions because they are three primary drivers of the projected royalty cash flows in the relief from royalty method. Cost of capital was also determined to be a significant assumption as it is the discount rate used to calculate the current fair value of those projected royalty cash flows. Changes in any of the significant assumptions used can materially affect the expected cash flows, and such impacts can result in material non-cash impairment charges. Under this approach, the estimated fair value of the indefinite life intangible assets exceeded their carrying value for all reporting units as of the testing date.

During the annual impairment test of indefinite life intangible assets in 2017 and 2016, the carrying values of four reporting units’ indefinite life intangible assets exceeded their fair values. The Company recorded a $2.7 million and $4.2 million impairment charge in 2017 and 2016, respectively.

As described above, the fair value measurement methods used in the Company’s goodwill and indefinite life intangible assets impairment analyses utilizes a number of significant unobservable inputs or Level 3 assumptions. These assumptions include, among others, projections of our future operating results, the implied fair value of these assets using an income approach by preparing a discounted cash flow analysis and other subjective assumptions.

The Company’s finite lived intangible assets as of December 31, 2018 and 2017 consisted of the following:

	2018						2017
(Table only in thousands) Intangible assets – finite life	Cost			Accum. Amort.			Cost			Accum. Amort.
Technology	$	14,457		$	9,414		$	15,867		$	8,609
Customer lists		68,943			37,873			77,497			35,024
Noncompetition agreements		910			762			1,118			698
Tradename		1,390			579			1,390			440
Foreign currency adjustments		(1,520	)		(407	)		(1,214	)		(69	)
Total finite life intangible assets	$	84,180		$	48,221		$	94,658		$	44,702

Amortization expense of finite life intangible assets was $9.6 million, $11.5 million and $13.9 million for 2018, 2017 and 2016, respectively. Amortization over the next five years for finite life intangibles is $8.1 million in 2019, $6.5 million in 2020, $5.3 million in 2021, $4.5 million in 2022, and $3.6 million in 2023.

Accounts Payable and Accrued Expenses

12 Months Ended

Dec. 31, 2018

Payables And Accruals [Abstract]

Accounts Payable and Accrued Expenses

8.	Accounts Payable and Accrued Expenses

Accounts payable and accrued expense consisted of the following:

	December 31,
(Table only in thousands)	2018		2017
Trade accounts payable, including amounts due to subcontractors	$	51,984	$	45,409
Compensation and related benefits		7,578		5,246
Current portion of earnout liability		—		2,989
Accrued warranty		3,384		4,464
Contract liability		6,541		1,676
Other		10,742		11,002
Total accounts payable and accrued expenses	$	80,229	$	70,786

The activity in the Company’s earnout liability was as follows for the years ended December 31, 2018 and 2017:

(Table only in thousands)	2018			2017
Earnout accrued at beginning of year	$	4,475		$	24,213
Fair value adjustment		(330	)		(6,610	)
Compensation expense adjustment		222			1,240
Foreign currency translation adjustment		(65	)		825
Payments		(2,862	)		(15,193	)
Other reclassifications		(1,440	)		—
Earnout accrued at end of year		—			4,475
Less: current portion of earnout		—			(2,989	)
Balance of long-term portion of earnout recorded in other liabilities	$	—		$	1,486


		The earnout liability is only associated with the Energy Solutions segment

Senior Debt

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Senior Debt

9.	Senior debt

Debt consisted of the following at December 31, 2018 and 2017:

	December 31,
(Table only in thousands)	2018			2017
Outstanding borrowings under Credit Facility (defined below). Term loan balance due upon maturity in September 2020.
– Term loan	$	76,147		$	113,903
– U.S. Dollar revolving loans		—			1,000
– Unamortized debt discount		(1,691	)		(2,834	)
Total outstanding borrowings under Credit Facility		74,456			112,069
Outstanding borrowings (U.S. dollar equivalent) under Foreign Debt		—			2,764
Total outstanding borrowings		74,456			114,833
Less: current portion		—			11,296
Total debt, less current portion	$	74,456		$	103,537

In 2018, the Company made prepayments of $36.2 million on the term loan. Due to the prepayments made in 2018, there are no additional payments due on the term loan until the final payment of $76.1 million in September 2020.

Credit Facility

The Company has entered into a credit agreement (the “Credit Agreement”) with various lenders (the “Lenders”) and letter of credit issuers (each, an “L/C Issuer”), and Bank of America, N.A., as Administrative Agent (the “Agent”), swing line lender and an L/C Issuer, providing for various senior secured credit facilities (collectively, the “Credit Facility”).

Pursuant to the amended and restated Credit Agreement, the Lenders currently provided a term loan in an aggregate principal amount of $170.0 million and a U.S. dollar revolving credit commitment in the aggregate principal amount of $60.5 million. The agreement includes a $19.5 million senior secured multi-currency revolving credit facility for U.S. dollar and specific foreign currency loans.

Under the terms of the Credit Facility, the Company is required to maintain certain financial and other covenants including the maintenance of a Consolidated Leverage Ratio as defined in the Credit Agreement. The Company must maintain a Consolidated Leverage Ratio of 3.75 through March 31, 2019, decreasing to 3.50 through September 30, 2019. The ratio will then decrease to 3.25 until the termination of the Credit Facility.

As of December 31, 2018 and 2017, $29.3 million and $24.4 million of letters of credit were outstanding, respectively. Total unused credit availability under the Credit Facility was $50.7 million and $54.6 million at December 31, 2018 and 2017, respectively. Revolving loans may be borrowed, repaid and reborrowed until September 3, 2020, at which time all amounts borrowed pursuant to the Credit Facility must be repaid.

At the Company’s option, revolving loans and the term loans accrue interest at a per annum rate based on either the highest of (a) the federal funds rate plus 0.5%, (b) the Agent’s prime lending rate, (c) one-month LIBOR plus 1.00%, plus a margin ranging from 1.0% to 2.0% depending on the Company’s Consolidated Leverage Ratio (“Base Rate”), or (d) a Eurocurrency Rate (as defined in the Credit Agreement) plus 1.0% to 2.0% depending on the Company’s Consolidated Leverage Ratio. Interest on swing line loans is the Base Rate.

Interest on Base Rate loans is payable quarterly in arrears on the last day of each calendar quarter and at maturity. Interest on Eurocurrency Rate loans is payable on the last date of each applicable Interest Period (as defined in the agreement), but in no event less than once every three months and at maturity. The weighted average interest rate on outstanding borrowings was 5.27% and 4.08% at December 31, 2018 and 2017, respectively.

The Company has granted a security interest in substantially all of its assets to secure its obligations pursuant to the Credit Agreement. The Company’s obligations under the Credit Agreement are guaranteed by the Company’s U.S. subsidiaries and such guaranty obligations are secured by a security interest on substantially all the assets of such subsidiaries, including certain real property. The Company’s obligations under the Credit Agreement may also be guaranteed by the Company’s material foreign subsidiaries to the extent no adverse tax consequences would result to the Company.

As of December 31, 2018 and 2017, the Company was in compliance with all related financial and other restrictive covenants under the Credit Facility.

In accordance with the Credit Facility terms, the Company entered into an interest rate swap on December 30, 2015 to hedge against interest rate exposure related to approximately one-third of the outstanding debt as of the date of the agreement indexed to LIBOR market rates. The fair value of the interest rate swap was an asset of $0.5 million and $0.3 million at December 31, 2018, and 2017, respectively, which is recorded in “Deferred charges and other assets” on the Consolidated Balance Sheets. The Company did not designate the interest rate swap as an effective hedge until the first quarter of 2016. The change in the fair value of the hedge prior to being designated as an effective hedge during the year ended December 31, 2016 of $0.5 million, was recorded in earnings in “Other income (expense), net” in the Consolidated Statements of Operations. From the date of designation, all changes to the fair value of the interest rate swap are recorded in other comprehensive income (loss) as long as the hedge is deemed effective.

Foreign Debt

The Company has a number of facilities and bilateral agreements in various countries currently supported by letters of credit issued by the Credit Facility or cash. As of December 31, 2018, the borrowers of these facilities and agreements were in compliance with all related financial and other restrictive covenants.

A subsidiary of the Company located in the Netherlands has a Euro-denominated facilities agreement which as of December 31, 2018 had no outstanding borrowings. The Company settled the outstanding amount of the overdraft facility in 2018. The Company plans to exit this facility and consolidate it with the Credit Facility.

Shareholders' Equity

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Shareholders' Equity

10.	Shareholders’ Equity

Dividends

Our dividend policy and the payment of cash dividends under that policy are subject to the Board of Director’s continuing determination that the dividend policy and the declaration of dividends are in the best interest of the Company’s shareholders. Future dividends and the dividend policy may be changed at the Company’s discretion at any time. Payment of dividends is also subject to the continuing compliance with our financial covenants under our Credit Facility. On November 6, 2017, the Board of Directors reviewed the Company’s dividend policy and determined that it would be in the best interest of the shareholders to suspend dividend payments.

During 2017 and 2016, our Board declared the following quarterly cash dividends on our common stock:

Dividend Per Share	Record Date	Payment Date
$0.075	August 7, 2017	September 29, 2017
$0.075	May 10, 2017	June 30, 2017
$0.075	March 6, 2017	March 31, 2017
$0.066	December 16, 2016	December 30, 2016
$0.066	September 16, 2016	September 30, 2016
$0.066	June 18, 2016	June 30, 2016
$0.066	March 18, 2016	March 31, 2016

Effective August 13, 2012, the Company implemented a Dividend Reinvestment Plan (the “Plan”), under which the Company may issue up to 750,000 shares of common stock. The Plan provides a way for interested shareholders to increase their holdings in our common stock. Participation in the Plan is strictly voluntary and is open only to existing shareholders. The Plan has had limited participation.

Share-Based Compensation

The Company’s 2017 Equity and Incentive Compensation Plan (the “2017 Plan”) was approved by the Company’s stockholders on May 16, 2017 which replaced the 2007 Equity Incentive Plan (the “2007 Plan”). No further grants will be made under the 2007 Plan, but outstanding awards under the 2007 Plan will continue to be unaffected in accordance with their terms. The 2017 Plan permits the granting of stock options with an exercise price equal to or greater than the fair market value of the Company’s common stock at the date of the grant, and other stock-based awards, including appreciation rights, restricted stock, restricted stock units, performance shares and dividend equivalents. A total of 1.9 million shares of common stock were authorized for issuance. As of December 31, 2018, 1.3 million shares remain available for future issuance. Stock options granted to employees generally vest equally over a period of four years from the date of the grant. Stock awards granted to employees generally vest over a period of three to four years from the date of the grant.

On June 10, 2017, the Company granted 700,000 performance units to our Chief Executive Officer with a fair value of $175,000 and are being expensed over the vesting period of three years. The maximum shares of common stock that the participant could receive upon vesting is 77,778 shares. The performance units are earned based upon the Company’s stock price during 30 consecutive trading days within a specified date range of approximately two years. The performance units are settled in the Company’s common stock subsequent to this specified date range. The estimated grant date fair value and compensation expense of each performance share was determined on the date of grant by using the Monte Carlo valuation model.

Share-based compensation expense for stock options and restricted stock awards under these plans was $3.1 million, $1.7 million and $2.2 million for 2018, 2017 and 2016, respectively. The tax benefit related to share based compensation expense was $0.5 million, zero and $0.2 million in 2018, 2017 and 2016, respectively.

Employee Stock Purchase Plan

The 2009 Employee Stock Purchase Plan (“ESPP”) was approved by shareholders on May 21, 2009. The ESPP is administered by the Compensation Committee. The ESPP allows employees to purchase shares of common stock at a 15% discount from market price and pay for the shares through payroll deductions. Eligible employees can enter the plan at specific “offering dates” that occur in six-month intervals.

The aggregate maximum number of shares of the Company’s common stock that may be granted under the ESPP is 1,500,000 shares over the ten-year term of the ESPP, subject to adjustment in the event there is a reorganization, merger, consolidation, recapitalization, reclassification, stock split-up, or similar transaction with respect to the common stock. As of December 31, 2018, 1.3 million shares remain available for future issuance.

The Company recognized employee stock purchase plan expense of $90,000, $83,000 and $71,000 in 2018, 2017 and 2016, respectively.

Stock Options

The estimated weighted-average fair value of stock options granted during 2017 and 2016, was $2.68 and $2.07 per option, respectively, using the Black-Scholes option-pricing model based on the following assumptions:

Expected Volatility: The Company utilizes a volatility factor based on the Company’s historical stock prices for a period of time equal to the expected term of the stock option utilizing weekly price observations. For 2017 and 2016, the Company utilized weighted-average volatility factors of 39%.

Expected Term: Due to limited historical exercise data, the Company utilizes the simplified method of determining the expected term based on the vesting schedules and terms of the stock options. For 2017 and 2016, the Company utilized weighted-average expected term factors of 6.3 years and 6.5 years, respectively.

Risk-Free Interest Rate: The risk-free interest rate factor utilized is based upon the implied yields currently available on U.S. Treasury zero-coupon issues over the expected term of the stock options. For 2017 and 2016, the Company utilized a weighted-average risk-free interest rate factor of 2.2% and 2.1%, respectively.

Expected Dividends: The Company utilized a weighted average expected dividend rate of 3.3% and 3.6% to value options granted during 2017 and 2016, respectively.

Information related to all stock options under the 2017 Plan and 2007 Plan for 2018, 2017 and 2016 is shown in the tables below:

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2017		655		$	10.53	6.0 years
Forfeitures		(132	)		11.53
Exercised		(16	)		5.55
Outstanding at December 31, 2018		507			10.43	5.2 years	$	186
Exercisable at December 31, 2018		402			10.52	4.6 years	$	186

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2016		1,519		$	10.25	6.1 years
Granted		128			9.24
Forfeitures		(700	)		12.44
Exercised		(292	)		3.92
Outstanding at December 31, 2017		655			10.53	6.0 years	$	78
Exercisable at December 31, 2017		463			10.49	5.2 years	$	78

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2015		1,877		$	10.30	6.8 years
Granted		105			7.36
Forfeitures		(268	)		11.91
Exercised		(195	)		6.90
Outstanding at December 31, 2016		1,519			10.25	6.1 years	$	5,816
Exercisable at December 31, 2016		959			9.23	5.3 years	$	4,608

Restricted Stock Awards

Information related to restricted stock awards under the 2017 Plan and 2007 Plan for 2018, 2017 and 2016 is shown in the table below. The fair value of restricted stock awards is based on the price of the stock in the open market on the date of the grant. The fair value of the restricted stock awards is recorded as compensation expense on a straight-line basis over the vesting periods of the awards and we account for forfeitures when they occur.

(Shares in thousands)	Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015		321		$	9.55
Granted		267			9.76
Vested		(17	)		10.24
Forfeited		(62	)		9.64
Nonvested at December 31, 2016		509			9.64
Granted		405			9.88
Vested		(92	)		9.78
Forfeited		(268	)		9.70
Nonvested at December 31, 2017		554			9.75
Granted		963			5.21
Vested		(217	)		9.50
Forfeited		(49	)		9.80
Nonvested at December 31, 2018		1,251			6.30

The Company received $0.1 million, $1.1 million and $1.3 million of cash from employees exercising options in 2018, 2017 and 2016, respectively. The intrinsic value of options exercised during 2018, 2017 and 2016 was $24,000, $2.6 million and $1.0 million, respectively. Unrecognized compensation expense related to nonvested shares of stock options, restricted stock and performance units was $6.3 million at December 31, 2018 and will be recognized over a weighted average vesting period of 2.3 years.

Warrants to Purchase Common Stock

On December 28, 2006, the Company issued warrants to purchase 250,000 shares to Icarus Investment Corp. (“Icarus”), a related party, at an exercise price of $9.07 and an expiration date of December 26, 2016. On December 7, 2016, the Company and Icarus entered into an amendment to the warrant agreement pursuant to which the warrants were amended to provide for the cashless exercise of the warrants. In 2016, all of the outstanding warrants were exercised and the Company issued 89,640 shares of common stock through a cashless exercise at an effective price of $9.07 per share. There are no additional warrants outstanding.

Stock Purchase

During 2016, the Company repurchased 30,000 shares of common stock from a former owner of a subsidiary acquired by the Company in 2014 for a total cost of $0.2 million. In December 2016, the Company entered into an agreement to repurchase 75,000 shares of common stock from a current segment president, who was a former owner of a subsidiary acquired by the Company in 2013, for a total cost of $1.1 million, which was paid in January 2017. The shares were immediately retired subsequent to their repurchase.

Pension and Employee Benefit Plans

12 Months Ended

Dec. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Pension and Employee Benefit Plans

11.	Pension and Employee Benefit Plans

We sponsor a non-contributory defined benefit pension plan for certain union employees. The accrual of future benefits for all participants who are non-union employees was frozen effective December 31, 2008. The plan is funded in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974.

The following tables set forth the plan changes in benefit obligations, plan assets and funded status on the measurement dates, December 31, 2018, 2017 and 2016, and amounts recognized in our Consolidated Balance Sheets within other long-term liabilities.


(Table only in thousands)	2018			2017			2016
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	36,327		$	35,012		$	36,140
Service cost		—			415			447
Interest cost		1,190			1,314			1,426
Actuarial (gain) / loss		(2,629	)		1,787			301
Administrative expenses		—			(402	)		(606	)
Benefits paid		(1,890	)		(1,799	)		(2,696	)
Projected benefit obligation at end of year		32,998			36,327			35,012
Change in plan assets:
Fair value of plan assets at beginning of year		26,836			24,063			25,296
Actual (loss) return on plan assets		(1,388	)		3,152			2,040
Employer contribution		639			1,822			29
Administrative expenses		—			(402	)		(606	)
Benefits paid		(1,890	)		(1,799	)		(2,696	)
Fair value of plan assets at end of year		24,197			26,836			24,063
Unfunded status	$	(8,801	)	$	(9,491	)	$	(10,949	)
Defined benefit liability included in other liabilities	$	(8,801	)	$	(9,491	)	$	(10,949	)
Deferred tax benefit associated with accumulated other comprehensive loss		2,116			3,153			3,107
Accumulated other comprehensive loss, net of tax		6,224			5,154			5,074
Other comprehensive (loss) income:
Net loss (gain)	$	271		$	358		$	90
Amortization of net actuarial gain		(238	)		(227	)		(212	)
Total recognized in other comprehensive (loss) income	$	33		$	131		$	(122	)
Amount recognized in accumulated other comprehensive (loss) income - Prior service cost	$	8,340		$	8,307		$	8,181
Weighted-average assumptions used to determine benefit obligations for the year ended December 31:
Discount rate		4.05	%		3.35	%		3.85	%

Benefits under the plan is not based on wages and, therefore, future wage adjustments have no effect on the projected benefit obligation.

During 2018, 2017 and 2016, the Company updated the mortality tables (RP-2017 Total Mortality Table, RP-2016 Total Mortality Table, and RP-2015 Total Mortality Table for each respective year) in the underlying assumptions used to determine the benefit obligation.

The details of net periodic benefit cost for pension benefits included in the accompanying Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016 are as follows:

(Table only in thousands)	2018			2017			2016
Service cost	$	—		$	415		$	447
Interest cost		1,190			1,314			1,426
Expected return on plan assets		(1,511	)		(1,723	)		(1,829	)
Net amortization and deferral		238			227			212
Net periodic benefit cost (income)	$	(83	)	$	233		$	256
Weighted-average assumptions used to determine net periodic benefit costs for the years ended December 31:
Discount rate		3.35	%		3.85	%		4.00	%
Expected return on assets		5.75	%		7.25	%		7.50	%

The basis of the long-term rate of return assumption reflects the current asset mix for the pension plan of approximately 30% to 40% debt securities and 60% to 70% equity securities with assumed average annual returns of approximately 4% to 6% for debt securities and 8% to 12% for equity securities. The investment portfolio for the pension plan will be adjusted periodically to maintain the current ratios of debt securities and equity securities. Additional consideration is given to the historical returns for the pension plan as well as future long range projections of investment returns for each asset category. The long-term rate of return also considers administrative expenses of the plan.

The net loss and prior service cost for the defined benefit pension plan that will be amortized from accumulated other comprehensive loss into net periodic benefit cost during 2019 are $0.2 million and zero, respectively.

Pension plan assets are invested in trusts comprised primarily of investments in various debt and equity funds. A fiduciary committee establishes the target asset mix and monitors asset performance. The expected rate of return on assets includes the determination of a real rate of return for equity and fixed income investment applied to the portfolio based on their relative weighting, increased by an underlying inflation rate. Our defined benefit pension plan asset allocation by asset category is as follows:

	Target Allocation			Percentage of Plan Assets
	2018			2018			2017
Asset Category:
Cash and cash equivalents		0	%		3	%		4	%
Equity securities		70	%		70	%		70	%
Debt securities		30	%		27	%		26	%
Total		100	%		100	%		100	%

Estimated pension plan cash obligations are $2.1 million, $2.1 million, $2.1 million, $2.1 million, and $2.1 million for 2019 through 2023, respectively, and a total of $10.5 million for the years 2024 through 2028.

Fair Value Measurements of Pension Plan Assets

Following is a description of the valuation methodologies used for pension assets measured at fair value:

•

Cash and cash equivalents: Cash and cash equivalents consist primarily of cash on deposit in money market funds. Cash and cash equivalents are stated at cost, which approximates fair value.

•

Equity securities: Equity securities consist of various managed funds that invest primarily in common stocks. These securities are valued at the net asset value of shares held by the plans at year end. The net asset value is calculated based on the underlying shares and investments held by the funds.

•

Debt securities: Debt securities consist of U.S. government and agency securities, corporate bonds and notes, and managed funds that invest in fixed income securities. U.S governmental and agency securities are valued at closing prices reported in the active market in which the individual securities are traded. Corporate bonds and notes are valued using market inputs including benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data including market research publications. Inputs may be prioritized differently at certain times based on market conditions. Managed funds are valued at the net asset value of shares held by the plans at year end. The net asset value is calculated based on the underlying investments held by the fund.

The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels.

The levels assigned to the defined benefit plan assets as of December 31, 2018, are summarized in the tables below:

(Table only in thousands)	Level 1		Level 2		Level 3		Total
Pension assets, at fair value:
Cash and cash equivalents	$	685	$	—	$	—	$	685
Equity securities		16,994		—		—		16,994
Debt securities		6,518		—		—		6,518
Total assets	$	24,197	$	—	$	—	$	24,197

The levels assigned to the defined benefit plan assets as of December 31, 2017, are summarized in the tables below:

(Table only in thousands)	Level 1		Level 2		Level 3		Total
Pension assets, at fair value:
Cash and cash equivalents	$	1,147	$	—	$	—	$	1,147
Equity securities		18,722		—		—		18,722
Debt securities		6,967		—		—		6,967
Total assets	$	26,836	$	—	$	—	$	26,836

The Company contributes to a number of multiemployer defined benefit pension plans under the terms of collective-bargaining agreements that cover its union-represented employees. The risks of participating in these multiemployer plans are different from single-employer plans in the following aspects:

•

Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers.

•

If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers.

•

If the Company chooses to stop participating in some of its multiemployer plans, CECO may be required to pay those plans an amount based on the underfunded status of the plan, referred to as a withdrawal liability.

The Company participation in these plans for the year ended December 31, 2018, is outlined in the table below. The “EIN/Pension Plan Number” column provides the Employer Identification Number and the three-digit plan number, if applicable. Unless otherwise noted, the most recent Pension Protection Act zone status available in 2018 is for the plan’s year-end at December 31, 2017. The zone status is based on information that the Company received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded. The “FIP/RP Status Pending/Implemented” column indicates plans for which a financial improvement plan (FIP) or a rehabilitation plan (RP) is either pending or has been implemented. The last column lists the expiration date(s) of the collective-bargaining agreement(s) to which the plans are subject.

Pension Fund	EIN/Pension Plan Number	Pension Protection Act Zone Status	FIP/RP Status Pending/ Implemented	Surcharge Imposed	Expiration of Collective Bargaining Agreement
Sheet Metal Workers’ National Pension Fund	52-6112463/001	Yellow	FIP: Yes - Implemented RP: Yes - Implemented	No	various
Sheet Metal Workers Local 224 Pension Plan	31-6171353/001	Yellow	FIP: Yes - Implemented	No	May 31, 2022
Sheet Metal Workers Local No. 20, Indianapolis Area Pension fund	51-0168516/001	Green	Is not subject	No	May 31, 2020
Sheet Metal Workers Local No. 177 Pension Fund	62-6093256/001	Green	Is not subject	No	May 1, 2019

Kirk and Blum was listed in the Sheet Metal Workers Local No. 177 Pension Fund’s Form 5500 as providing more than five percent of total contributions for the year ended December 31, 2017. The Company was not listed in any of the other plans’ Forms 5500 as providing more than five percent of the total contributions for the plans and plan years. At the date the financial statements were issued, Forms 5500 were not available for the plan years ended December 31, 2018.

We have no current intention of withdrawing from any plan and, therefore, no liability has been provided in the accompanying consolidated financial statements.

Amounts charged to pension expense under the above plans including the multi-employer plans totaled $1.4 million, $2.0 million and $2.1 million in 2018, 2017 and 2016, respectively.

We have a profit sharing and 401(k) savings retirement plan for employees of certain of our subsidiaries. The plan covers substantially all employees who have 30 days of service, and who have attained 18 years of age. The plan allows us to make discretionary contributions and provides for employee salary deferrals of up to 100%. We made aggregate matching contributions and discretionary contributions of $1.7 million, $1.6 million, and $1.5 million during 2018, 2017 and 2016, respectively.

Leases

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Leases

12.

Leases

Sale-leaseback Transactions

Financing Transaction

In 2016, the Company entered into an agreement to sell one of its manufacturing facilities for gross proceeds of $5.0 million, less costs associated with the transaction of $0.3 million, or net proceeds of $4.7 million. As a part of the transaction, the Company entered into a lease for the property from the purchaser for an initial period of 13 years. In June 2017, the agreement was amended extending the term through June 2031. This sale-leaseback has been accounted for as a financing transaction with a current effective interest rate of 4.53%. Payments made by the Company are allocated between interest expense and a reduction to the sale-leaseback financing liability.

As of December 31, 2018, future payments on the sale-leaseback financing liability are as follows (in thousands):

Years
2019	$	414
2020		422
2021		431
2022		439
2023		448
Thereafter		3,658
Total payments		5,812
Less amount representing interest		(1,431	)
Total liability		4,381
Less current portion, included in accounts payable and accrued expenses		(220	)
Long-term portion included, in other liabilities	$	4,161

As of December 31, 2018 and 2017, the net carrying value of the facility assets that are included in property, plant, and equipment on our Consolidated Balance Sheets amounted to $10.2 million and $11.0 million, respectively, which are depreciated over the remaining term of the lease.

Capital Leases

In 2016, the Company entered into agreements to sell two of its manufacturing facilities for gross proceeds of $9.3 million, less costs associated with the transaction of $0.5 million, or net proceeds of $8.8 million. As a part of the transactions, the Company entered into 13-year leases for the properties from the purchasers. In June 2018, the leases were amended extending the expiration date through August 2030.

The Company recorded a $4.4 million deferred gain on the sale of these facilities which is recorded in the Consolidated Balance Sheets as a reduction to property, plant, and equipment. The deferred gain is recognized over the remainder of the lease term. As a result of these transactions, the Company recorded a capital lease obligation of $8.7 million. The current weighted-average effective interest rates of the capital leases are 4.26% to 4.67%.

The future minimum payments for the aforementioned capital leases as of December 31, 2018, are as follows (in thousands):

Fiscal Years
2019	$	838
2020		855
2021		872
2022		889
2023		907
Thereafter		6,407
Total payments		10,768
Less amount representing interest		(2,433	)
Present value of future minimum lease payments		8,335
Less current portion, included in accounts payable and accrued expenses		(478	)
Long-term portion, included in other liabilities	$	7,857

Capital lease assets included in the Consolidated Balance Sheets as part of property, plant, and equipment as of December 31, 2018 and 2017, are as follows (in thousands):

	2018			2017			Depreciable Life (Years)

Building and improvements, net of deferred gain	$	4,385		$	4,385			13
Less: Accumulated depreciation		(850	)		(534	)
Total	$	3,535		$	3,851

Rent

We lease certain facilities on a year-to-year basis. We also have future annual minimum rental commitments under noncancelable operating leases as follows:

(Table only in thousands) December 31,
2019	$	2,745
2020		1,880
2021		1,454
2022		931
2023		851
2024 and thereafter		2,278
	$	10,139

Total rent expense under all operating leases for 2018, 2017 and 2016 was $3.7 million, $4.2 million and $4.5 million, respectively.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

13.	Commitments and Contingencies

Legal Proceedings

Asbestos cases

Our subsidiary, Met-Pro, beginning in 2002 began to be named in asbestos-related lawsuits filed against a large number of industrial companies including, in particular, those in the pump and fluid handling industries. In management’s opinion, the complaints typically have been vague, general and speculative, alleging that Met-Pro, along with the numerous other defendants, sold unidentified asbestos-containing products and engaged in other related actions which caused injuries (including death) and loss to the plaintiffs. Counsel has advised that more recent cases typically allege more serious claims of mesothelioma. The Company’s insurers have hired attorneys who, together with the Company, are vigorously defending these cases. Many cases have been dismissed after the plaintiff fails to produce evidence of exposure to Met-Pro’s products. In those cases, where evidence has been produced, the Company’s experience has been that the exposure levels are low and the Company’s position has been that its products were not a cause of death, injury or loss. The Company has been dismissed from or settled a large number of these cases. Cumulative settlement payments from 2002 through December 31, 2018 for cases involving asbestos-related claims were $2.9 million which together with all legal fees other than corporate counsel expenses; $2.7 million have been paid by the Company’s insurers. The average cost per settled claim, excluding legal fees, was approximately $36,000.

Based upon the most recent information available to the Company regarding such claims, there were a total of 208 cases pending against the Company as of December 31, 2018 (with Illinois, New York, Pennsylvania and West Virginia having the largest number of cases), as compared with 218 cases that were pending as of December 31, 2017. During 2018, 96 new cases were filed against the Company, and the Company was dismissed from 63 cases and settled 43 cases. Most of the pending cases have not advanced beyond the early stages of discovery, although a number of cases are on schedules leading to or are scheduled for trial. The Company believes that its insurance coverage is adequate for the cases currently pending against the Company and for the foreseeable future, assuming a continuation of the current volume, nature of cases and settlement amounts. However, the Company has no control over the number and nature of cases that are filed against it, nor as to the financial health of its insurers or their position as to coverage. The Company also presently believes that none of the pending cases will have a material adverse impact upon the Company’s results of operations, liquidity or financial condition.

Other

The Company is also a party to routine contract and employment-related litigation matters and routine audits of state and local tax returns arising in the ordinary course of its business.

The final outcome and impact of open matters, and related claims and investigations that may be brought in the future, are subject to many variables, and cannot be predicted. In accordance with ASC 450, “Contingencies,” and related guidance, we record reserves for estimated losses relating to claims and lawsuits when available information indicates that a loss is probable and the amount of the loss, or range of loss, can be reasonably estimated. The Company expenses legal costs as they are incurred.

We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows.

Income Taxes

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

14.	Income Taxes

On December 22, 2017, the Tax Act was signed into law making significant changes to the U.S. tax code. In conjunction with guidance set forth under SAB 118, the Company recorded provisional amounts at December 31, 2017 for, most significantly, the remeasurement of deferred tax assets and liabilities to reflect the new U.S. statutory rate of 21 percent, and to account for the one-time “transition” tax on unrepatriated foreign earnings. During the year ended December 31, 2018, the Company updated its SAB 118 provisional estimates and completed its accounting for the provisions made as of December 31, 2017, which resulted in a $1.7 million adjustment for deemed distributions on foreign earnings.

Certain of the Company’s undistributed earnings of its foreign subsidiaries are not permanently reinvested, as management intends to repatriate foreign-held cash as needed to meet domestic cash needs for operating, investing, and financing activities. A liability of $0.6 million has been recorded for the deferred taxes on such undistributed foreign earnings. The deferred taxes are attributable primarily to the foreign withholding taxes that would become payable should the Company repatriate cash held in its foreign operations.

Income (loss) before income taxes was generated in the United States and globally as follows:

(Table only in thousands)	2018			2017			2016
Domestic	$	6,230		$	3,891		$	(39,623	)
Foreign		(3,733	)		(2,482	)		6,659
	$	2,497		$	1,409		$	(32,964	)

Income tax provision consisted of the following for the years ended December 31:

(Table only in thousands)	2018			2017			2016
Current:
Federal	$	5,166		$	6,234		$	4,957
State		1,660			388			892
Foreign		2,834			939			3,191
		9,660			7,561			9,040
Deferred:
Federal		1,144			(2,479	)		(2,794	)
State		56			114			(409	)
Foreign		(1,242	)		(758	)		(547	)
		(42	)		(3,123	)		(3,750	)
	$	9,618		$	4,438		$	5,290

The income tax provision differs from the statutory rate due to the following:

(Table only in thousands)	2018			2017			2016
Tax expense (benefit) at statutory rate	$	524		$	494		$	(11,525	)
Increase (decrease) in tax resulting from:
State income tax, net of federal benefit		1,337			367			174
Domestic production activities deduction		—			(235	)		(561	)
Intangible asset and goodwill impairment		—			1,789			17,859
Change in uncertain tax position reserves		73			465			(624	)
Permanent differences related to divestitures		7,048			—			—
Permanent differences		693			1,026			(31	)
Impact of rate differences and adjustments		57			(20	)		(1,655	)
United States and foreign tax incentives		(1,443	)		(240	)		(1,035	)
Earnout (income) expense		(69	)		(1,779	)		2,573
Change in valuation allowance		1,521			1,044			222
Revaluation of deferred tax assets and liabilities		—			(4,819	)		—
Net deemed distribution on repatriation of foreign earnings		(1,713	)		6,426			—
Foreign withholding taxes on repatriation of foreign earnings		666			—			—
Other		924			(80	)		(107	)
	$	9,618		$	4,438		$	5,290

Deferred income taxes reflect the future tax consequences of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and tax credit carry forwards. The net deferred tax liabilities consisted of the following at December 31:

	December 31
(Table only in thousands)	2018			2017
Gross deferred tax assets:
Accrued expenses and other	$	417		$	286
Reserves on assets		1,276			2,000
Share-based compensation awards		459			436
Minimum pension		2,153			2,318
Net operating loss carry-forwards		3,478			3,471
Tax credit carry-forwards		2,352			1,634
Valuation allowances		(5,474	)		(3,873	)
		4,661			6,272
Gross deferred tax liabilities:
Depreciation		(646	)		(448	)
Goodwill and intangibles		(10,907	)		(13,588	)
Prepaid expenses and inventory		(798	)		(585	)
Withholding tax on unremitted foreign earnings		(551	)		—
Revenue recognition		(514	)		(1,861	)
		(13,416	)		(16,482	)
Net deferred tax liabilities	$	(8,755	)	$	(10,210	)

As of December 31, 2018, the Company has utilized substantially all of its federal net operating loss carry forwards. State and local net operating loss carry forwards total $29.4 million, which expire from 2019 to 2038. The Company has recorded a valuation allowance on certain of these net operating loss carry forwards to reflect expected realization. A $1.1 million foreign tax credit carryforward was generated in 2017 and a full valuation allowance has been recorded against it. The Company also has net operating loss carry forwards in foreign jurisdictions totaling $11.5 million. A full valuation allowance has been established against substantially all of these losses in foreign jurisdictions. As of December 31, 2018 and 2017, the Company has recorded a valuation reserve in the amount of $5.5 million and $3.9 million, respectively. The changes in the valuation allowance resulted in additional income tax expense of $1.5 million, $1.0 million, and $0.2 million in 2018, 2017, and 2016, respectively.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities (including the impact of available carryback and carry forward periods), projected future taxable income, and tax-planning strategies in making this assessment. Based on this assessment, management believes it is more likely than not that the Company will realize the benefits of these deductible differences, net of the existing valuation allowances at December 31, 2018. The amount of the deferred tax assets considered realizable, however, could be reduced in the near term if estimates of future taxable income during the carryforward period are reduced.

The Company accounts for uncertain tax positions pursuant to FASB ASC Topic 740. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company estimates that it may settle one or more foreign and domestic audits in the next twelve months that may result in a decrease in the amount of accrual for uncertain tax positions of up to $0.5 million. A reconciliation of the beginning and ending amount of uncertain tax position reserves included in other liabilities on the Consolidated Balance Sheets is as follows:

(Table only in thousands)	2018		2017
Balance as of January 1,	$	866	$	401
Additions for tax positions taken in prior years		73		465
Statute expirations		—		—
Reductions of tax positions taken in prior years		—		—
Balance as of December 31,	$	939	$	866

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. The reserve for uncertain tax positions includes $0.3 million, $0.3 million and $0.2 million of interest and penalties as of December 31, 2018, 2017 and 2016, respectively. The favorable settlement of all uncertain tax positions would impact the Company’s effective income tax rate. Tax years going back to 2014 remain open for examination by Federal authorities, and back to 2013 remain open for all significant state and foreign authorities.

Related Party Transactions

12 Months Ended

Dec. 31, 2018

Related Party Transactions

15.	Related Party Transactions

During 2018, 2017 and 2016 we paid fees of $0.2 million, $0.3 million and $0.4 million, respectively, for consulting services to Icarus, through which Jason DeZwirek, our Chairman of our Board, provides services. During 2018, 2017 and 2016, we paid fees of $0.1 million in each year for consulting services to JMP Fam Holdings Inc., through which Jonathan Pollack, a member of the Board of Directors, provides services. All services described above are based on verbal agreements with the Company. The Board of Directors approves the above services on an annual basis.

During the year ended December 31, 2016, the Company issued 89,640 shares of common stock to Icarus in connection with a cashless exercise of a warrant. In 2016, the Company entered into an agreement to repurchase 75,000 shares of common stock from a current employee. See Note 10 for further detail related to these transactions.

During 2018, 2017, and 2016, we incurred rent expense of $0.6 million, $0.6 million, and $1.1 million, respectively, to lease facilities owned by the subsidiaries’ former owners at Adwest, Zhongli and Emtrol. Effective January 1, 2017, Adwest moved facilities and ended their lease with the former owner of the subsidiary, resulting in zero rent expense paid to the former owner.

During 2018, 2017, and 2016, we purchased $0.3 million, $0.8 million and $0.8 million in inventory from companies owned by the former owner of the Zhongli subsidiary. During 2018, 2017, and 2016, we sold $0.1 million, $0.1 million and zero of inventory to the same companies. The Company employed the former owner in a managerial role at this subsidiary through December 31, 2017.

Acquisition of Noncontrolling Interest

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Acquisition of Noncontrolling Interest

16.Acquisition of Noncontrolling Interest

In connection with the 2015 Peerless Mfg. Co. acquisition, the Company acquired a 60% equity investment in Peerless Propulsys that entitled the Company to 80% of Peerless Propulsys’s earnings. On July 11, 2016, the Company entered into an agreement with the noncontrolling owner of Peerless Propulsys and issued a promissory note in the amount of $5.3 million due on July 11, 2019 in exchange for 100% ownership in the equity and earnings of Peerless Propulsys. The minority interest had a carrying value of $4.1 million on the transaction date, compared to the purchase price of $5.3 million. Since the Company already had control over the equity investment, the $1.2 million excess paid over the carrying value was recorded as a reduction to additional paid in capital. The interest rate on the note is 1.50%, which approximates the market rate given the short-term duration of the note. As of December 31, 2018, the outstanding balance of the note was $1.7 million and was paid off in January 2019. The note is classified as a current liability in the Consolidated Balance Sheets as of December 31, 2018.

Divestitures

12 Months Ended

Dec. 31, 2018

Discontinued Operations And Disposal Groups [Abstract]

Divestitures

17.	Divestitures

Strobic Air Corporation

On March 30, 2018, the Company completed the sale of Strobic Air Corporation (“Strobic”) as part of its strategic decision to exit brands that do not align with the CECO portfolio to increase focus on better serving the energy and industrial solutions and fluid handling markets. The sales price was $28.5 million, subject to post-closing purchase price adjustments. The disposition resulted in a gain of $6.9 million, comprised of $27.9 million of net proceeds received as consideration after post-closing purchase price adjustments less net assets disposed of $18.8 million and transaction costs of $2.2 million. The net assets disposed of are primarily comprised of $13.0 million of goodwill, $2.3 million of definite-lived intangible assets and $1.2 million of indefinite-lived intangible assets allocated to the Strobic business. In 2017, Strobic reported $17.7 million in net sales and $1.6 million in income from operations. Strobic results through the date of disposition are included within income before income taxes in the Consolidated Statement of Operations and are reported within the Fluid Handling Solutions segment. The sale of Strobic did not constitute a significant strategic shift that will have a material impact on the Company’s ongoing operations and financial results.

Keystone Filter

On February 28, 2018, the Company completed the sale of the Keystone Filter brand (“Keystone”) as part of its strategic decision to exit brands that do not align with the CECO portfolio to increase focus on better serving energy and industrial solutions and fluid handling markets. The sales price was $7.5 million, subject to post-closing purchase price adjustments. The disposition resulted in a gain of $4.3 million, comprised of $7.2 million of net proceeds after post-closing purchase price adjustments less net assets disposed of $2.7 million and transaction costs of $0.2 million. Keystone results are reported within the Fluid Handling Solutions segment through the date of disposition.

Zhongli

On November 27, 2018, the Company completed the sale of Jiangyin Zhongli Industrial Technology Co. Ltd (“Zhongli”), a business in our Energy Solutions segment operating in China for a price of $3.6 million. In the third quarter of 2018, we classified the assets and liabilities of Zhongli as held-for-sale. In connection with classifying this business as held-for-sale, GAAP required us to assess impairment by comparing the estimated selling price, less cost to sell to our carrying value in Zhongli. Based on this analysis, we recorded a $15.1 million estimated loss. The disposal of this business does not constitute a significant strategic shift that will have a material impact on the Company’s ongoing operations and financial results. Zhongli results are reported within the Energy Solutions segment through the date of disposition.

Business Segment Information

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Business Segment Information

18.	Business Segment Information

The Company’s operations are organized and reviewed by management along its product lines or end market that the segment serves and are presented in three reportable segments. The results of the segments are reviewed through to the “Income (loss) from operations” line on the Consolidated Statements of Operations. The accounting policies of the segments are the same as those in the consolidated financial statements. Except for the information reported on a segment basis, the Company does not accumulate net sales information by product or service and therefore, the Company does not disclose net sales by product or service because to do so would be impractical.

During the first quarter of 2018, the Company finalized an overall assessment and recalibration of its strategy. As a part of the changes to its strategy, management determined that a realignment of the Company’s segments was necessary to better reflect the technologies and solutions we provide, and the end markets we serve. As a result of this realignment, the reportable segments of the Company have been renamed and we reclassified the operating results of certain business units within the Energy Solutions and Industrial Solutions segments to have their reportable segment more closely align with our strategy. We have reclassified all prior year amounts to reflect the new segment structure.

The Company’s reportable segments are organized as groups of similar products and services, as described as follows:

•

Energy Solutions segment: Our Energy Solutions segment serves the Energy market, where we are a key part of helping meet the global demand for Clean Energy with products and services that support our customers with efficient solutions and technologies to keep the world clean and safe. Our offerings improve air quality and solves fluid handling needs with market leading, highly engineered, and customized solutions for the power generation, oil & gas, and petrochemical industries.

•

Industrial Solutions segment: Our Industrial Solutions segment serves the Industrial Pollution Control market where our aim is to address the growing need to protect the air we breathe and help our customers’ desires for sustainability upgrades beyond carbon footprint issues. Our offerings improve air quality with a compelling solution set of air pollution control technologies that enable our customers to reduce their carbon footprint, lower energy consumption, minimize waste and meet compliance targets for toxic emissions, fumes, volatile organic compounds, and industrial odors.

•

Fluid Handling Solutions segment: Our Fluid Handling Solutions segment offers unique pump and filtration solutions that maintain safe and clean operations in some of the most harsh and toxic environments. In this market, we provide solutions for mission-critical applications to a wide variety of industries including, but not limited to, plating and metal finishing, food and beverage, chemical, petrochemical, pharmaceutical, wastewater treatment, desalination and the aquarium & aquaculture markets.

	2018		2017			2016
Net Sales (less intra-, inter-segment sales)
(Table only in thousands)
Energy Solutions segment	$	211,185	$	188,955		$	254,806
Industrial Solutions segment		75,414		87,838			101,909
Fluid Handling Solutions segment		50,740		69,159			61,788
Corporate and Other (1)		—		(901	)		(1,492	)
Net sales	$	337,339	$	345,051		$	417,011

(1)	Includes adjustment for revenue on intercompany jobs.

	2018			2017			2016
Income (loss) from Operations
(Table only in thousands)
Energy Solutions segment	$	28,398		$	14,565		$	30,582
Industrial Solutions segment		5,635			8,123			8,481
Fluid Handling Solutions segment		8,402			14,736			(36,209	)
Corporate and Other (2)		(32,433	)		(26,649	)		(26,817	)
Eliminations		—			(2,751	)		(1,599	)
Income (loss) from operations	$	10,002		$	8,024		$	(25,562	)

(2)Includes corporate compensation, professional services, information technology, acquisition and integration expenses, and other general, administrative corporate expenses and loss on divestitures

	2018		2017		2016
Property and Equipment Additions
(Table only in thousands)
Energy Solutions segment	$	205	$	444	$	672
Industrial Solutions segment		756		160		301
Fluid Handling Solutions segment (3)		1,226		382		4,481
Corporate and Other		903		42		7
Property and equipment additions	$	3,090	$	1,028	$	5,461

(3)	Includes non-cash additions of $4,385 for property, plant, and equipment acquired under capital leases for 2016. See Note 12 for further detail.

	2018		2017		2016
Depreciation and Amortization
(Table only in thousands)
Energy Solutions segment	$	8,112	$	9,675	$	11,557
Industrial Solutions segment		1,067		1,488		1,814
Fluid Handling Solutions segment		3,517		4,754		5,406
Corporate and Other		576		171		126
Depreciation and amortization	$	13,272	$	16,088	$	18,903

	December 31,
	2018		2017
Identifiable Assets
(Table only in thousands)
Energy Solutions segment	$	245,842	$	258,218
Industrial Solutions segment		54,179		66,723
Fluid Handling Solutions segment		73,910		100,917
Corporate and Other (4)		18,651		12,691
Identifiable assets	$	392,582	$	438,549

(4)	Corporate assets primarily consist of cash and income tax related assets.

	December 31,
	2018		2017
Goodwill
(Table only in thousands)
Energy Solutions segment	$	97,930	$	98,408
Industrial Solutions segment		22,419		22,419
Fluid Handling Solutions segment		31,807		46,124
Goodwill	$	152,156	$	166,951

Intra-segment and Inter-segment Revenues

The Company has divisions that sell to each other within segments (intra-segment sales) and between segments (inter-segment sales) as indicated in the following tables:

	Year Ended December 31, 2018
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other		Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	220,334	$	(7,912	)	$	(1,232	)	$	—		$	(5	)	$	—	$	211,185
Industrial Solutions segment		79,139		(3,084	)		—			(600	)		(41	)		—		75,414
Fluid Handling Solutions segment		52,846		(1,483	)		(616	)		(7	)		—			—		50,740
Corporate and Other		—		—			—			—			—			—		—
Net Sales	$	352,319	$	(12,479	)	$	(1,848	)	$	(607	)	$	(46	)	$	—	$	337,339

	Year Ended December 31, 2017
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other			Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	197,897	$	(8,833	)	$	(109	)	$	—		$	—		$	—		$	188,955
Industrial Solutions segment		91,915		(3,235	)		—			(787	)		(55	)		—			87,838
Fluid Handling Solutions segment		73,652		(3,169	)		(492	)		(832	)		—			—			69,159
Corporate and Other (5)		—		—			—			—			—			(901	)		(901	)
Net Sales	$	363,464	$	(15,237	)	$	(601	)	$	(1,619	)	$	(55	)	$	(901	)	$	345,051

	Year Ended December 31, 2016
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other			Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	258,710	$	(3,506	)	$	(398	)	$	—		$	—		$	—		$	254,806
Industrial Solutions segment		109,524		(4,256	)		—			(3,153	)		(206	)		—			101,909
Fluid Handling Solutions segment		64,332		(1,714	)		(317	)		(513	)		—			—			61,788
Corporate and Other (5)		—		—			—			—			—			(1,492	)		(1,492	)
Net Sales	$	432,566	$	(9,476	)	$	(715	)	$	(3,666	)	$	(206	)	$	(1,492	)	$	417,011

(5)

Includes adjustment for revenue on intercompany jobs.

No single customer represented greater than 10% of consolidated net sales or accounts receivable for 2018, 2017, or 2016.

For 2018, 2017, and 2016, sales to customers outside the United States, including export sales, accounted for approximately 33%, 32%, and 37%, respectively, of consolidated net sales. The largest portion of export sales in 2018 was destined for Asia (11.5%), Europe (11.0%), and Middle East and Africa (6.2%). Of consolidated long-lived assets, $19.1 million and $29.7 million were located outside of the United States as of December 31, 2018 and 2017, respectively. The largest portion of long-lived assets located outside the United States at December 31, 2018 were in Europe ($14.5 million).

Quarterly Data (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Data (Unaudited)

19.	Quarterly Data (Unaudited)

Earnings per share amounts are computed independently each quarter. Accordingly, the sum of each quarter’s per share amount may not equal the total per share amount for the respective year.

	Quarter
(Table only in thousands, except per share data)	First		Second			Third			Fourth
Year ended December 31, 2018
Net sales	$	74,139	$	81,089		$	88,256		$	93,854
Gross profit		25,561		27,525			28,674			29,777
Net income (loss) attributable to CECO Environmental Corp.		5,763		(901	)		(12,915	)		931
Basic earnings (loss) per share	$	0.17	$	(0.03	)	$	(0.37	)	$	0.03
Diluted earnings (loss) per share	$	0.17	$	(0.03	)	$	(0.37	)	$	0.03

Year ended December 31, 2017
Net sales	$	92,651	$	93,870		$	84,987		$	73,543
Gross profit		31,929		28,486			27,133			25,646
Net income (loss) attributable to CECO Environmental Corp.		38		5,486			3,036			(11,589	)
Basic earnings (loss) per share	$	0.00	$	0.16		$	0.09		$	(0.34	)
Diluted earnings (loss) per share	$	0.00	$	0.16		$	0.09		$	(0.34	)

Nature of Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Nature of business

Principles of consolidation

Principles of consolidation—Our consolidated financial statements include the Company and its controlled subsidiaries. All intercompany balances and transactions have been eliminated.

Unless indicated, all balances within tables are in thousands except per share amounts.

Use of estimates

Cash equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Statements of Cash Flows.

	December 31,
	2018		2017
Cash and cash equivalents	$	43,676	$	29,902
Restricted cash		762		591
Restricted cash included within deferred charges and other assets		—		166
Total cash, cash equivalents and restricted cash	$	44,438	$	30,659

Accounts Receivable

Inventories

Assets Held for Sale

Property, plant and equipment

Cost of sales—Cost of sales amounts include materials, direct labor and associated benefits, inbound freight charges, purchasing and receiving, inspection, warehousing, and depreciation.

Claims

Pre-contract costs

Selling and administrative expenses

Acquisition and integration expenses

Amortization and earnout expenses

Restructuring expenses

Product Warranties

Research and Development

Income taxes

Earnings per share

Earnings per share—The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share for 2018, 2017 and 2016.

	For the Year Ended December 31
	2018			2017			2016
(Table only in thousands)
Numerator (for basic and diluted earnings per share)
Net loss	$	(7,121	)	$	(3,029	)	$	(38,218	)

Denominator
Basic weighted-average shares outstanding		34,714			34,445			33,980
Common stock equivalents arising from stock options and restricted stock awards		—			—			—
Diluted weighted-average shares outstanding		34,714			34,445			33,980

Once a restricted stock award vests, it is included in the computation of weighted average shares outstanding for purposes of basic and diluted earnings per share.

Foreign Currency Translation

Income and expenses are translated into USD at average exchange rates in effect during the period.

New Financial Accounting Pronouncements

Accounting Standards Adopted in 2018

Accounting Standards Yet to be Adopted

Nature of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported within Consolidated Statements of Cash Flows

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Consolidated Statements of Cash Flows.

	December 31,
	2018		2017
Cash and cash equivalents	$	43,676	$	29,902
Restricted cash		762		591
Restricted cash included within deferred charges and other assets		—		166
Total cash, cash equivalents and restricted cash	$	44,438	$	30,659

Schedule of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share

Earnings per share—The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share for 2018, 2017 and 2016.

	For the Year Ended December 31
	2018			2017			2016
(Table only in thousands)
Numerator (for basic and diluted earnings per share)
Net loss	$	(7,121	)	$	(3,029	)	$	(38,218	)

Denominator
Basic weighted-average shares outstanding		34,714			34,445			33,980
Common stock equivalents arising from stock options and restricted stock awards		—			—			—
Diluted weighted-average shares outstanding		34,714			34,445			33,980

Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

Summary of Accounts Receivable

Accounts receivable consisted of the following:

	December 31,
(Table only in thousands)	2018			2017
Trade receivables	$	7,296		$	11,603
Contract receivables		48,826			60,543
Allowance for doubtful accounts		(2,897	)		(4,156	)
Total accounts receivable	$	53,225		$	67,990

Costs and Estimated Earnings on Uncompleted Contracts (Tables)

12 Months Ended

Dec. 31, 2018

Text Block [Abstract]

Costs and Estimated Earnings on Uncompleted Contracts

	December 31,
(Table only in thousands)	2018			2017
Costs incurred on uncompleted contracts	$	174,168		$	169,665
Estimated earnings		67,427			61,556
Total costs and estimated earnings on uncompleted contracts, gross		241,595			231,221
Less billings to date		(232,045	)		(217,743	)
Total costs and estimated earnings on uncompleted contracts, net	$	9,550		$	13,478
Included in the accompanying consolidated balance sheets under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	29,694		$	33,947
Billings in excess of costs and estimated earnings on uncompleted contracts		(20,144	)		(20,469	)
Total costs and estimated earnings on uncompleted contracts, net	$	9,550		$	13,478

Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	December 31,
(Table only in thousands)	2018			2017
Raw materials	$	15,819		$	18,444
Work in process		6,098			3,182
Finished goods		807			940
Obsolescence allowance		(1,907	)		(1,597	)
Total inventories	$	20,817		$	20,969

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Summary of Property, Plant and Equipment

	December 31,
(Table only in thousands)	2018			2017
Land	$	1,623		$	1,627
Building and improvements		18,185			18,063
Machinery and equipment		25,257			25,068
Property, plant and equipment, gross		45,065			44,758
Less accumulated depreciation		(22,865	)		(21,358	)
Property, plant and equipment, net	$	22,200		$	23,400

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill / Tradename

(Table only in thousands)	Energy Solutions segment			Industrial Solutions segment		Fluid Handling segment			Totals
Balance of goodwill at December 31, 2016	$	101,610		$	22,419	$	46,124		$	170,153
Impairment charge		(4,443	)		—		—			(4,443	)
Foreign currency translation		1,241			—		—			1,241
Balance of goodwill at December 31, 2017		98,408			22,419		46,124			166,951
Divestitures		—			—		(14,317	)		(14,317	)
Foreign currency translation		(478	)		—		—			(478	)
Balance of goodwill at December 31, 2018	$	97,930		$	22,419	$	31,807		$	152,156

	Tradenames
(Table only in thousands)	2018			2017
Balance beginning of year	$	19,691		$	22,042
Impairment charge		—			(2,725	)
Divestitures		(1,340	)		—
Foreign currency adjustments		(93	)		374
Balance end of year	$	18,258		$	19,691

Summary of Finite Lived Intangible Assets

The Company’s finite lived intangible assets as of December 31, 2018 and 2017 consisted of the following:

	2018						2017
(Table only in thousands) Intangible assets – finite life	Cost			Accum. Amort.			Cost			Accum. Amort.
Technology	$	14,457		$	9,414		$	15,867		$	8,609
Customer lists		68,943			37,873			77,497			35,024
Noncompetition agreements		910			762			1,118			698
Tradename		1,390			579			1,390			440
Foreign currency adjustments		(1,520	)		(407	)		(1,214	)		(69	)
Total finite life intangible assets	$	84,180		$	48,221		$	94,658		$	44,702

Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2018

Payables And Accruals [Abstract]

Summary of Accounts Payable and Accrued Expenses

Accounts payable and accrued expense consisted of the following:

	December 31,
(Table only in thousands)	2018		2017
Trade accounts payable, including amounts due to subcontractors	$	51,984	$	45,409
Compensation and related benefits		7,578		5,246
Current portion of earnout liability		—		2,989
Accrued warranty		3,384		4,464
Contract liability		6,541		1,676
Other		10,742		11,002
Total accounts payable and accrued expenses	$	80,229	$	70,786

Schedule of Earnout Liability

The activity in the Company’s earnout liability was as follows for the years ended December 31, 2018 and 2017:

(Table only in thousands)	2018			2017
Earnout accrued at beginning of year	$	4,475		$	24,213
Fair value adjustment		(330	)		(6,610	)
Compensation expense adjustment		222			1,240
Foreign currency translation adjustment		(65	)		825
Payments		(2,862	)		(15,193	)
Other reclassifications		(1,440	)		—
Earnout accrued at end of year		—			4,475
Less: current portion of earnout		—			(2,989	)
Balance of long-term portion of earnout recorded in other liabilities	$	—		$	1,486

Senior Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Summary of Debt

Debt consisted of the following at December 31, 2018 and 2017:

	December 31,
(Table only in thousands)	2018			2017
Outstanding borrowings under Credit Facility (defined below). Term loan balance due upon maturity in September 2020.
– Term loan	$	76,147		$	113,903
– U.S. Dollar revolving loans		—			1,000
– Unamortized debt discount		(1,691	)		(2,834	)
Total outstanding borrowings under Credit Facility		74,456			112,069
Outstanding borrowings (U.S. dollar equivalent) under Foreign Debt		—			2,764
Total outstanding borrowings		74,456			114,833
Less: current portion		—			11,296
Total debt, less current portion	$	74,456		$	103,537

Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Dividend Declared

During 2017 and 2016, our Board declared the following quarterly cash dividends on our common stock:

Dividend Per Share	Record Date	Payment Date
$0.075	August 7, 2017	September 29, 2017
$0.075	May 10, 2017	June 30, 2017
$0.075	March 6, 2017	March 31, 2017
$0.066	December 16, 2016	December 30, 2016
$0.066	September 16, 2016	September 30, 2016
$0.066	June 18, 2016	June 30, 2016
$0.066	March 18, 2016	March 31, 2016

Summary of Stock Option

Information related to all stock options under the 2017 Plan and 2007 Plan for 2018, 2017 and 2016 is shown in the tables below:

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2017		655		$	10.53	6.0 years
Forfeitures		(132	)		11.53
Exercised		(16	)		5.55
Outstanding at December 31, 2018		507			10.43	5.2 years	$	186
Exercisable at December 31, 2018		402			10.52	4.6 years	$	186

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2016		1,519		$	10.25	6.1 years
Granted		128			9.24
Forfeitures		(700	)		12.44
Exercised		(292	)		3.92
Outstanding at December 31, 2017		655			10.53	6.0 years	$	78
Exercisable at December 31, 2017		463			10.49	5.2 years	$	78

(Shares in thousands)	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2015		1,877		$	10.30	6.8 years
Granted		105			7.36
Forfeitures		(268	)		11.91
Exercised		(195	)		6.90
Outstanding at December 31, 2016		1,519			10.25	6.1 years	$	5,816
Exercisable at December 31, 2016		959			9.23	5.3 years	$	4,608

Summary of Restricted Stock Awards

(Shares in thousands)	Shares			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2015		321		$	9.55
Granted		267			9.76
Vested		(17	)		10.24
Forfeited		(62	)		9.64
Nonvested at December 31, 2016		509			9.64
Granted		405			9.88
Vested		(92	)		9.78
Forfeited		(268	)		9.70
Nonvested at December 31, 2017		554			9.75
Granted		963			5.21
Vested		(217	)		9.50
Forfeited		(49	)		9.80
Nonvested at December 31, 2018		1,251			6.30

Pension and Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Schedule of Changes in Projected Benefit Obligations

Weighted-average Assumptions Used to Determine Net Periodic Benefit Cost

The details of net periodic benefit cost for pension benefits included in the accompanying Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016 are as follows:

(Table only in thousands)	2018			2017			2016
Service cost	$	—		$	415		$	447
Interest cost		1,190			1,314			1,426
Expected return on plan assets		(1,511	)		(1,723	)		(1,829	)
Net amortization and deferral		238			227			212
Net periodic benefit cost (income)	$	(83	)	$	233		$	256
Weighted-average assumptions used to determine net periodic benefit costs for the years ended December 31:
Discount rate		3.35	%		3.85	%		4.00	%
Expected return on assets		5.75	%		7.25	%		7.50	%

Details of Defined Benefit Pension Plan Asset Allocation by Asset Category

Our defined benefit pension plan asset allocation by asset category is as follows:

	Target Allocation			Percentage of Plan Assets
	2018			2018			2017
Asset Category:
Cash and cash equivalents		0	%		3	%		4	%
Equity securities		70	%		70	%		70	%
Debt securities		30	%		27	%		26	%
Total		100	%		100	%		100	%

Disclosure of Fair Value Measurements of Pension Plan Assets

The levels assigned to the defined benefit plan assets as of December 31, 2018, are summarized in the tables below:

(Table only in thousands)	Level 1		Level 2		Level 3		Total
Pension assets, at fair value:
Cash and cash equivalents	$	685	$	—	$	—	$	685
Equity securities		16,994		—		—		16,994
Debt securities		6,518		—		—		6,518
Total assets	$	24,197	$	—	$	—	$	24,197

The levels assigned to the defined benefit plan assets as of December 31, 2017, are summarized in the tables below:

(Table only in thousands)	Level 1		Level 2		Level 3		Total
Pension assets, at fair value:
Cash and cash equivalents	$	1,147	$	—	$	—	$	1,147
Equity securities		18,722		—		—		18,722
Debt securities		6,967		—		—		6,967
Total assets	$	26,836	$	—	$	—	$	26,836

Summary of Pension Fund General Information

Pension Fund	EIN/Pension Plan Number	Pension Protection Act Zone Status	FIP/RP Status Pending/ Implemented	Surcharge Imposed	Expiration of Collective Bargaining Agreement
Sheet Metal Workers’ National Pension Fund	52-6112463/001	Yellow	FIP: Yes - Implemented RP: Yes - Implemented	No	various
Sheet Metal Workers Local 224 Pension Plan	31-6171353/001	Yellow	FIP: Yes - Implemented	No	May 31, 2022
Sheet Metal Workers Local No. 20, Indianapolis Area Pension fund	51-0168516/001	Green	Is not subject	No	May 31, 2020
Sheet Metal Workers Local No. 177 Pension Fund	62-6093256/001	Green	Is not subject	No	May 1, 2019

Leases (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Schedule of Future Payment on Sale-leaseback Financing Liability

As of December 31, 2018, future payments on the sale-leaseback financing liability are as follows (in thousands):

Years
2019	$	414
2020		422
2021		431
2022		439
2023		448
Thereafter		3,658
Total payments		5,812
Less amount representing interest		(1,431	)
Total liability		4,381
Less current portion, included in accounts payable and accrued expenses		(220	)
Long-term portion included, in other liabilities	$	4,161

Schedule of Future Minimum Payments for Capital Leases

The future minimum payments for the aforementioned capital leases as of December 31, 2018, are as follows (in thousands):

Fiscal Years
2019	$	838
2020		855
2021		872
2022		889
2023		907
Thereafter		6,407
Total payments		10,768
Less amount representing interest		(2,433	)
Present value of future minimum lease payments		8,335
Less current portion, included in accounts payable and accrued expenses		(478	)
Long-term portion, included in other liabilities	$	7,857

Schedule of Capital Lease Assets Included in Condensed Consolidated Balance Sheets

Capital lease assets included in the Consolidated Balance Sheets as part of property, plant, and equipment as of December 31, 2018 and 2017, are as follows (in thousands):

	2018			2017			Depreciable Life (Years)

Building and improvements, net of deferred gain	$	4,385		$	4,385			13
Less: Accumulated depreciation		(850	)		(534	)
Total	$	3,535		$	3,851

Summary of Future Annual Minimum Rental Commitments Under Non-Cancellable Operating Lease

We lease certain facilities on a year-to-year basis. We also have future annual minimum rental commitments under noncancelable operating leases as follows:

(Table only in thousands) December 31,
2019	$	2,745
2020		1,880
2021		1,454
2022		931
2023		851
2024 and thereafter		2,278
	$	10,139

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Income (Loss) Before Income Taxes

Income (loss) before income taxes was generated in the United States and globally as follows:

(Table only in thousands)	2018			2017			2016
Domestic	$	6,230		$	3,891		$	(39,623	)
Foreign		(3,733	)		(2,482	)		6,659
	$	2,497		$	1,409		$	(32,964	)

Schedule of Income Tax Provision

Income tax provision consisted of the following for the years ended December 31:

(Table only in thousands)	2018			2017			2016
Current:
Federal	$	5,166		$	6,234		$	4,957
State		1,660			388			892
Foreign		2,834			939			3,191
		9,660			7,561			9,040
Deferred:
Federal		1,144			(2,479	)		(2,794	)
State		56			114			(409	)
Foreign		(1,242	)		(758	)		(547	)
		(42	)		(3,123	)		(3,750	)
	$	9,618		$	4,438		$	5,290

The income tax provision differs from the statutory rate due to the following:

(Table only in thousands)	2018			2017			2016
Tax expense (benefit) at statutory rate	$	524		$	494		$	(11,525	)
Increase (decrease) in tax resulting from:
State income tax, net of federal benefit		1,337			367			174
Domestic production activities deduction		—			(235	)		(561	)
Intangible asset and goodwill impairment		—			1,789			17,859
Change in uncertain tax position reserves		73			465			(624	)
Permanent differences related to divestitures		7,048			—			—
Permanent differences		693			1,026			(31	)
Impact of rate differences and adjustments		57			(20	)		(1,655	)
United States and foreign tax incentives		(1,443	)		(240	)		(1,035	)
Earnout (income) expense		(69	)		(1,779	)		2,573
Change in valuation allowance		1,521			1,044			222
Revaluation of deferred tax assets and liabilities		—			(4,819	)		—
Net deemed distribution on repatriation of foreign earnings		(1,713	)		6,426			—
Foreign withholding taxes on repatriation of foreign earnings		666			—			—
Other		924			(80	)		(107	)
	$	9,618		$	4,438		$	5,290

Schedule of Net Deferred Tax Assets and Liabilities

	December 31
(Table only in thousands)	2018			2017
Gross deferred tax assets:
Accrued expenses and other	$	417		$	286
Reserves on assets		1,276			2,000
Share-based compensation awards		459			436
Minimum pension		2,153			2,318
Net operating loss carry-forwards		3,478			3,471
Tax credit carry-forwards		2,352			1,634
Valuation allowances		(5,474	)		(3,873	)
		4,661			6,272
Gross deferred tax liabilities:
Depreciation		(646	)		(448	)
Goodwill and intangibles		(10,907	)		(13,588	)
Prepaid expenses and inventory		(798	)		(585	)
Withholding tax on unremitted foreign earnings		(551	)		—
Revenue recognition		(514	)		(1,861	)
		(13,416	)		(16,482	)
Net deferred tax liabilities	$	(8,755	)	$	(10,210	)

Schedule of Reconciliation of Uncertain Tax Position

A reconciliation of the beginning and ending amount of uncertain tax position reserves included in other liabilities on the Consolidated Balance Sheets is as follows:

(Table only in thousands)	2018		2017
Balance as of January 1,	$	866	$	401
Additions for tax positions taken in prior years		73		465
Statute expirations		—		—
Reductions of tax positions taken in prior years		—		—
Balance as of December 31,	$	939	$	866

Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Net Sales and Income (Loss) from Operation by Business Segment

	2018		2017			2016
Net Sales (less intra-, inter-segment sales)
(Table only in thousands)
Energy Solutions segment	$	211,185	$	188,955		$	254,806
Industrial Solutions segment		75,414		87,838			101,909
Fluid Handling Solutions segment		50,740		69,159			61,788
Corporate and Other (1)		—		(901	)		(1,492	)
Net sales	$	337,339	$	345,051		$	417,011

(1)	Includes adjustment for revenue on intercompany jobs.

	2018			2017			2016
Income (loss) from Operations
(Table only in thousands)
Energy Solutions segment	$	28,398		$	14,565		$	30,582
Industrial Solutions segment		5,635			8,123			8,481
Fluid Handling Solutions segment		8,402			14,736			(36,209	)
Corporate and Other (2)		(32,433	)		(26,649	)		(26,817	)
Eliminations		—			(2,751	)		(1,599	)
Income (loss) from operations	$	10,002		$	8,024		$	(25,562	)

(2)Includes corporate compensation, professional services, information technology, acquisition and integration expenses, and other general, administrative corporate expenses and loss on divestitures

Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets

	2018		2017		2016
Property and Equipment Additions
(Table only in thousands)
Energy Solutions segment	$	205	$	444	$	672
Industrial Solutions segment		756		160		301
Fluid Handling Solutions segment (3)		1,226		382		4,481
Corporate and Other		903		42		7
Property and equipment additions	$	3,090	$	1,028	$	5,461

(3)	Includes non-cash additions of $4,385 for property, plant, and equipment acquired under capital leases for 2016. See Note 12 for further detail.

	2018		2017		2016
Depreciation and Amortization
(Table only in thousands)
Energy Solutions segment	$	8,112	$	9,675	$	11,557
Industrial Solutions segment		1,067		1,488		1,814
Fluid Handling Solutions segment		3,517		4,754		5,406
Corporate and Other		576		171		126
Depreciation and amortization	$	13,272	$	16,088	$	18,903

	December 31,
	2018		2017
Identifiable Assets
(Table only in thousands)
Energy Solutions segment	$	245,842	$	258,218
Industrial Solutions segment		54,179		66,723
Fluid Handling Solutions segment		73,910		100,917
Corporate and Other (4)		18,651		12,691
Identifiable assets	$	392,582	$	438,549

(4)	Corporate assets primarily consist of cash and income tax related assets.

Goodwill

	December 31,
	2018		2017
Goodwill
(Table only in thousands)
Energy Solutions segment	$	97,930	$	98,408
Industrial Solutions segment		22,419		22,419
Fluid Handling Solutions segment		31,807		46,124
Goodwill	$	152,156	$	166,951

Intra-Segment and Inter-Segment Revenues

The Company has divisions that sell to each other within segments (intra-segment sales) and between segments (inter-segment sales) as indicated in the following tables:

	Year Ended December 31, 2018
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other		Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	220,334	$	(7,912	)	$	(1,232	)	$	—		$	(5	)	$	—	$	211,185
Industrial Solutions segment		79,139		(3,084	)		—			(600	)		(41	)		—		75,414
Fluid Handling Solutions segment		52,846		(1,483	)		(616	)		(7	)		—			—		50,740
Corporate and Other		—		—			—			—			—			—		—
Net Sales	$	352,319	$	(12,479	)	$	(1,848	)	$	(607	)	$	(46	)	$	—	$	337,339

	Year Ended December 31, 2017
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other			Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	197,897	$	(8,833	)	$	(109	)	$	—		$	—		$	—		$	188,955
Industrial Solutions segment		91,915		(3,235	)		—			(787	)		(55	)		—			87,838
Fluid Handling Solutions segment		73,652		(3,169	)		(492	)		(832	)		—			—			69,159
Corporate and Other (5)		—		—			—			—			—			(901	)		(901	)
Net Sales	$	363,464	$	(15,237	)	$	(601	)	$	(1,619	)	$	(55	)	$	(901	)	$	345,051

	Year Ended December 31, 2016
						Less Inter-Segment Sales
	Total Sales		Intra - Segment Sales			Industrial			Energy			Fluid			Corp and Other			Net Sales to Outside Customers
Net Sales
(Table only in thousands)
Energy Solutions segment	$	258,710	$	(3,506	)	$	(398	)	$	—		$	—		$	—		$	254,806
Industrial Solutions segment		109,524		(4,256	)		—			(3,153	)		(206	)		—			101,909
Fluid Handling Solutions segment		64,332		(1,714	)		(317	)		(513	)		—			—			61,788
Corporate and Other (5)		—		—			—			—			—			(1,492	)		(1,492	)
Net Sales	$	432,566	$	(9,476	)	$	(715	)	$	(3,666	)	$	(206	)	$	(1,492	)	$	417,011

(5)

Includes adjustment for revenue on intercompany jobs.

Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Earnings per share amounts are computed independently each quarter. Accordingly, the sum of each quarter’s per share amount may not equal the total per share amount for the respective year.

	Quarter
(Table only in thousands, except per share data)	First		Second			Third			Fourth
Year ended December 31, 2018
Net sales	$	74,139	$	81,089		$	88,256		$	93,854
Gross profit		25,561		27,525			28,674			29,777
Net income (loss) attributable to CECO Environmental Corp.		5,763		(901	)		(12,915	)		931
Basic earnings (loss) per share	$	0.17	$	(0.03	)	$	(0.37	)	$	0.03
Diluted earnings (loss) per share	$	0.17	$	(0.03	)	$	(0.37	)	$	0.03

Year ended December 31, 2017
Net sales	$	92,651	$	93,870		$	84,987		$	73,543
Gross profit		31,929		28,486			27,133			25,646
Net income (loss) attributable to CECO Environmental Corp.		38		5,486			3,036			(11,589	)
Basic earnings (loss) per share	$	0.00	$	0.16		$	0.09		$	(0.34	)
Diluted earnings (loss) per share	$	0.00	$	0.16		$	0.09		$	(0.34	)

Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Obligation shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Cash equivalents and restricted cash, original maturities of highly liquid investments		3 months
Accounts receivables payment period from invoice date		30 days
Property, Plant and Equipment, Useful Life		13 years
Incurred or capitalized deferred financing costs			$ 700,000
Provision for Estimated losses on uncompleted contracts		$ 0	$ 0
Anti-dilutive options and unvested restricted stock units outstanding \| shares		0.8	0.7	1.6
Foreign currency transaction gain (loss)		$ 700,000	$ 100,000	$ 700,000
U.S. federal corporate statutory tax rate		21.00%	35.00%
ASU 2018-02 [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Decrease in accumulated loss	$ 1,100
Increase in accumulated other comprehensive loss	$ 1,100
ASU 2014-09 [Member] \| Energy Solutions And Industrial Solutions Segments
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Revenue performance obligation, description of timing		The typical life of our contracts is generally less than 12 months and each contract generally contains only one performance obligation, to provide goods or services to the customer.
Number of performance obligation \| Obligation		1
Interest Expense
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Amortization of deferred finance cost		$ 1,100,000	$ 1,000,000	$ 1,100,000
Discount to Debt [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Capitalized deferred financing costs		$ 1,700,000	$ 2,800,000
Tradename [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		10 years
Non-compete Agreements [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		5 years
Minimum [Member] \| Technology [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		7 years
Minimum [Member] \| Customer Lists [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		5 years
Maximum [Member] \| ASU 2014-09 [Member] \| Energy Solutions And Industrial Solutions Segments
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Contracts life		12 months
Maximum [Member] \| Technology [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		10 years
Maximum [Member] \| Customer Lists [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Useful Life		20 years
Building and Improvements [Member] \| Minimum [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Building and Improvements [Member] \| Maximum [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life		40 years
Machinery and Equipment [Member] \| Minimum [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life		2 years
Machinery and Equipment [Member] \| Maximum [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life		15 years

Nature of Business and Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported within Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Changes And Error Corrections [Abstract]
Cash and cash equivalents	$ 43,676	$ 29,902
Restricted cash	762	591
Restricted cash included within deferred charges and other assets		166
Total cash, cash equivalents and restricted cash	$ 44,438	$ 30,659	$ 48,006	$ 39,513

Nature of Business and Summary of Significant Accounting Policies - Schedule of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator (for basic and diluted earnings per share)
Net loss	$ (7,121)	$ (3,029)	$ (38,218)
Denominator
Basic	34,714,395	34,445,256	33,979,549
Diluted	34,714,395	34,445,256	33,979,549

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Of Financial Instruments [Line Items]
Fair value of note payable	$ 1,700	$ 5,300
Cash and cash equivalents	43,676	29,902
Cash held outside United States, principally in Netherlands, United Kingdom, China, and Canada	23,300	19,700
Credit Facility [Member]
Fair Value Of Financial Instruments [Line Items]
Fair value of debt issued	$ 76,100	$ 114,900

Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract receivables	$ 48,826	$ 60,543
Allowance for doubtful accounts	(2,897)	(4,156)
Total accounts receivable	53,225	67,990
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 7,296	$ 11,603

Accounts Receivable - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount billed but not received under retainage provisions in contracts	$ 900	$ 2,500
Retainage receivables on contracts minimum period	1 year
Retainage receivables on contracts maximum period	2 years
Provision for doubtful accounts	$ 1,357	3,895	$ 848
Charge-offs	800	1,500	$ 300
Allowance for doubtful accounts	2,897	$ 4,156
Contract Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Divestitures impacted amount on contract receivables	22,200
Allowance for doubtful accounts	$ 1,200

Costs and Estimated Earnings on Uncompleted Contracts - Costs and Estimated Earnings on Uncompleted Contracts (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Costs In Excess Of Billings On Uncompleted Contracts Or Programs [Abstract]
Costs incurred on uncompleted contracts	$ 174,168	$ 169,665
Estimated earnings	67,427	61,556
Total costs and estimated earnings on uncompleted contracts, gross	241,595	231,221
Less billings to date	(232,045)	(217,743)
Total costs and estimated earnings on uncompleted contracts, net	9,550	13,478
Included in the accompanying consolidated balance sheets under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	29,694	33,947
Billings in excess of costs and estimated earnings on uncompleted contracts	(20,144)	(20,469)
Total costs and estimated earnings on uncompleted contracts, net	$ 9,550	$ 13,478

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Inventory Net [Abstract]
Raw materials	$ 15,819	$ 18,444
Work in process	6,098	3,182
Finished goods	807	940
Obsolescence allowance	(1,907)	(1,597)
Total inventories	$ 20,817	$ 20,969

Inventories - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Amounts credited to the allowance for obsolete inventory	$ 0.5	$ 0.2	$ 1.2
Items charged to the allowance for inventory write-offs	$ 0.3	$ 0.6	$ 0.2

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 45,065	$ 44,758
Less accumulated depreciation	(22,865)	(21,358)
Property, plant and equipment, net	22,200	23,400
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,623	1,627
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	18,185	18,063
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 25,257	$ 25,068

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Depreciation expense	$ 3.5	$ 4.5	$ 5.0

Goodwill and Intangible Assets - Goodwill / Tradename (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, beginning balance	$ 166,951	$ 170,153
Goodwill, impairment charge	0	(4,443)	$ (53,800)
Goodwill, divestitures	(14,317)
Goodwill, foreign currency translation	(478)	1,241
Goodwill, ending balance	152,156	166,951	170,153
Tradename, beginning balance	19,691	22,042
Tradename, impairment charge		(2,725)
Tradename, divestitures	(1,340)
Tradename, foreign currency adjustments	(93)	374
Tradename, ending balance	18,258	19,691	22,042
Energy Solutions Segment [Member]
Goodwill [Line Items]
Goodwill, beginning balance	98,408	101,610
Goodwill, impairment charge		(4,443)
Goodwill, foreign currency translation	(478)	1,241
Goodwill, ending balance	97,930	98,408	101,610
Industrial Solutions Segment [Member]
Goodwill [Line Items]
Goodwill, beginning balance	22,419	22,419
Goodwill, ending balance	22,419	22,419	22,419
Fluid Handling Segment [Member]
Goodwill [Line Items]
Goodwill, beginning balance	46,124	46,124
Goodwill, divestitures	(14,317)
Goodwill, ending balance	$ 31,807	$ 46,124	$ 46,124

Goodwill and Intangible Assets - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Unit	Dec. 31, 2017 USD ($) Unit	Dec. 31, 2016 USD ($) Unit
Schedule Of Goodwill And Other Intangible Assets [Line Items]
Aggregate amount of goodwill acquired	$ 212,800	$ 242,300
Aggregate amount of impairment	$ 60,700	75,300
Number of reporting units \| Unit	3
Goodwill, impairment loss	$ 0	4,443	$ 53,800
Impairment of intangible assets		2,725
Amortization expense of finite life intangible assets	9,600	$ 11,500	$ 13,900
Amortization expense of finite life intangibles for 2019	8,100
Amortization expense of finite life intangibles for 2020	6,500
Amortization expense of finite life intangibles for 2021	5,300
Amortization expense of finite life intangibles for 2022	4,500
Amortization expense of finite life intangibles for 2023	$ 3,600
Four Reporting Units [Member]
Schedule Of Goodwill And Other Intangible Assets [Line Items]
Number of reporting units \| Unit		4	4
Impairment of intangible assets		$ 2,700	$ 4,200

Goodwill and Intangible Assets - Summary of Finite Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Cost	$ 84,180	$ 94,658
Accumulated Amortization	48,221	44,702
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	14,457	15,867
Accumulated Amortization	9,414	8,609
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	68,943	77,497
Accumulated Amortization	37,873	35,024
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	910	1,118
Accumulated Amortization	762	698
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,390	1,390
Accumulated Amortization	579	440
Foreign Currency Adjustments [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	(1,520)	(1,214)
Accumulated Amortization	$ (407)	$ (69)

Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Payables And Accruals [Abstract]
Trade accounts payable, including amounts due to subcontractors	$ 51,984	$ 45,409
Compensation and related benefits	7,578	5,246
Current portion of earnout liability		2,989
Accrued warranty	3,384	4,464
Contract liability	6,541	1,676
Other	10,742	11,002
Total accounts payable and accrued expenses	$ 80,229	$ 70,786

Accounts Payable and Accrued Expenses - Summary of Earnout Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition Contingent Consideration [Line Items]
Fair value adjustment	$ (330)	$ (6,610)	$ 4,218
Less: current portion of earnout		(2,989)
Energy Solutions Segment [Member]
Business Acquisition Contingent Consideration [Line Items]
Earnout accrued at beginning of year	4,475	24,213
Fair value adjustment	(330)	(6,610)
Compensation expense adjustment	222	1,240
Foreign currency translation adjustment	(65)	825
Payments	(2,862)	(15,193)
Other reclassifications	$ (1,440)
Earnout accrued at end of year		4,475	$ 24,213
Less: current portion of earnout		(2,989)
Balance of long term portion of earnout recorded in other liabilities at end of period		$ 1,486

Senior Debt - Summary of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total outstanding borrowings	$ 74,456	$ 114,833
Less: current portion		11,296
Total debt, less current portion	74,456	103,537
Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	76,147	113,903
Term Debt [Member]
Debt Instrument [Line Items]
Unamortized debt discount	(1,691)	(2,834)
US Dollar Borrowings [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Total outstanding borrowings	$ 74,456	112,069
US Dollar Borrowings [Member] \| U.S. Dollar Revolving Loans [Member]
Debt Instrument [Line Items]
Total outstanding borrowings under Credit Facility		1,000
US Dollar Borrowings [Member] \| Foreign Facility [Member]
Debt Instrument [Line Items]
Total outstanding borrowings		$ 2,764

Senior Debt - Summary of Debt (Parenthetical) (Detail)	12 Months Ended
Senior Debt - Summary of Debt (Parenthetical) (Detail)	Dec. 31, 2018
Term Loan [Member]
Debt Instrument [Line Items]
Term loans, year of maturity	2020-09

Senior Debt - Additional Information (Detail) - USD ($)	12 Months Ended
Senior Debt - Additional Information (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2016	Sep. 30, 2020	Mar. 31, 2019	Dec. 31, 2017
Line Of Credit Facility [Line Items]
Prepayment of outstanding debt	$ 36,200,000
Final scheduled principal payment due in September 2020	$ 76,100,000
Maximum consolidated leverage ratio	375.00%
Weighted average interest rate on outstanding borrowings	5.27%				4.08%
Interest rate swap, fair value, asset	$ 500,000				$ 300,000
Changes in fair value income (loss)		$ 500,000
Credit facility, outstanding borrowings	$ 74,456,000				114,833,000
Cross Currency Interest Rate Contract [Member] \| Minimum [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Cross Currency Interest Rate Contract [Member] \| Maximum [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Federal Funds Rate [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Base Rate [Member] \| Minimum [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Base Rate [Member] \| Maximum [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
One-Month LIBOR [Member]
Line Of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Unused credit availability under credit facility	$ 50,700,000				54,600,000
Scenario Forecast [Member]
Line Of Credit Facility [Line Items]
Maximum consolidated leverage ratio			325.00%	350.00%
Term Loan [Member]
Line Of Credit Facility [Line Items]
Increased credit facility commitment for either revolving credit facility or term loan facility	170,000,000
Credit facility, outstanding borrowings	76,147,000				113,903,000
U.S. Dollar Revolving Loans [Member]
Line Of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities	60,500,000
Multi-currency Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities	19,500,000
Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities	29,300,000				$ 24,400,000
Netherlands Facility [Member]
Line Of Credit Facility [Line Items]
Credit facility, outstanding borrowings	$ 0

Shareholders' Equity - Schedule of Dividend Declared (Detail)	12 Months Ended
	Dec. 31, 2018 $ / shares
Record Date One [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.075
Record Date	Aug. 07, 2017
Payment Date	Sep. 29, 2017
Record Date Two [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.075
Record Date	May 10, 2017
Payment Date	Jun. 30, 2017
Record Date Three [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.075
Record Date	Mar. 06, 2017
Payment Date	Mar. 31, 2017
Record Date Four [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.066
Record Date	Dec. 16, 2016
Payment Date	Dec. 30, 2016
Record Date Five [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.066
Record Date	Sep. 16, 2016
Payment Date	Sep. 30, 2016
Record Date Six [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.066
Record Date	Jun. 18, 2016
Payment Date	Jun. 30, 2016
Record Date Seven [Member]
Dividends Declared [Line Items]
Dividend Per Share	$ 0.066
Record Date	Mar. 18, 2016
Payment Date	Mar. 31, 2016

Shareholders' Equity - Additional Information (Detail) - USD ($)		1 Months Ended		12 Months Ended
	Jun. 10, 2017	Jan. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 16, 2017	Aug. 13, 2012	Dec. 28, 2006
Class of Stock [Line Items]
Issuance of common stock Dividend Reinvestment Plan				100,000,000	100,000,000
Number of stock option granted					128,000	105,000
Share-based compensation expense				$ 3,100,000	$ 1,700,000	$ 2,200,000
Tax benefit related to stock based compensation expense				$ 500,000	0	200,000
Discount from market price				15.00%
Employees offering dates intervals				6 months
Number of shares authorized in employee stock purchase plan				1,500,000
Employee stock purchase plan period				10 years
Employee stock purchase plan number of shares remain available for future issuance				1,300,000
Employee stock purchase plan expense				$ 90,000	$ 83,000	$ 71,000
Estimated weighted-average fair value of stock options granted					$ 2.68	$ 2.07
Expected volatility rate					39.00%	39.00%
Expected term period					6 years 3 months 18 days	6 years 6 months
Risk-free interest rate					2.20%	2.10%
Expected dividend rate					3.30%	3.60%
Cash received from employee stock option exercised				100,000	$ 1,100,000	$ 1,300,000
Intrinsic value of option exercised				$ 24,000,000	$ 2,600,000	$ 1,000,000
Warrants issued to acquire Icarus Share									250,000
Warrants exercise price									$ 9.07
Warrants expiration date				Dec. 26, 2016
Common stock, shares issued				34,953,825	34,707,924
Warrant outstanding			0			0
Aggregate value transaction value of share purchased						$ 1,238,000
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares issued			89,640			89,640
Shares issued, price per share			$ 9.07			$ 9.07
Share purchased						105,000
Aggregate value transaction value of share purchased						$ 1,000
Common Stock [Member] \| Former Owner of Subsidiary Acquired [Member]
Class of Stock [Line Items]
Share purchased						30,000
Aggregate value transaction value of share purchased						$ 200,000
Common Stock [Member] \| Current Segment President [Member]
Class of Stock [Line Items]
Share purchased			75,000			75,000
Aggregate value transaction value of share purchased		$ 1,100,000
Performance Units [Member]
Class of Stock [Line Items]
Maximum shares of common stock participant could receive upon vesting	77,778
Common stock price threshold consecutive trading days	30 days
Period to earn units based on stock price during thirty consecutive trading days	2 years
Performance Units [Member] \| Chief Executive Officer [Member]
Class of Stock [Line Items]
2017 stock options or stock awards, vesting period	3 years
Number of stock awards granted	700,000
Fair value of stock awards granted	$ 175,000
Restricted Stock and Performance Units [Member]
Class of Stock [Line Items]
Unrecognized compensation expense related to stock options and restricted stock				$ 6,300,000
Weighted average vesting period				2 years 3 months 18 days
Dividend Reinvestment Plan [Member]
Class of Stock [Line Items]
Issuance of common stock Dividend Reinvestment Plan								750,000
2017 Plan [Member]
Class of Stock [Line Items]
Shares available for future grant				1,300,000
2017 Plan [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Number of shares reserved for issuance							1,900,000
2017 Plan [Member] \| Minimum [Member]
Class of Stock [Line Items]
2017 stock options or stock awards, vesting period				3 years
2017 Plan [Member] \| Maximum [Member]
Class of Stock [Line Items]
2017 stock options or stock awards, vesting period				4 years
2017 Plan [Member] \| Employee Stock Option [Member]
Class of Stock [Line Items]
2017 stock options or stock awards, vesting period				4 years
2007 Plan [Member]
Class of Stock [Line Items]
Number of stock option granted				0

Shareholders' Equity - Summary of Stock Option (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Beginning balance of outstanding shares	655	1,519	1,877
Granted, Shares		128	105
Forfeitures, Shares	(132)	(700)	(268)
Exercised, Shares	(16)	(292)	(195)
Ending balance of outstanding, shares	507	655	1,519	1,877
Exercisable, Shares	402	463	959
Beginning Balance of Outstanding Weighted Average Exercise Price	$ 10.53	$ 10.25	$ 10.30
Granted, Weighted Average Exercise Price		9.24	7.36
Forfeitures, Weighted Average Exercise Price	11.53	12.44	11.91
Exercised, Weighted Average Exercise Price	5.55	3.92	6.90
Ending Balance of Outstanding Weighted Average Exercise Price	10.43	10.53	10.25	$ 10.30
Exercisable, Weighted Average Exercise Price	$ 10.52	$ 10.49	$ 9.23
Outstanding, Weighted Average Remaining Contractual Term	5 years 2 months 12 days	6 years	6 years 1 month 6 days	6 years 9 months 18 days
Exercisable, Weighted Average Remaining Contractual Term	4 years 7 months 6 days	5 years 2 months 12 days	5 years 3 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 186	$ 78	$ 5,816
Exercisable, Aggregate Intrinsic Value	$ 186	$ 78	$ 4,608

Shareholders' Equity - Summary of Restricted Stock Awards (Detail) - Restricted Stock [Member] - 2007 Plan [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Summary Of Restricted Stock Unit Activity [Line Items]
Beginning balance , Nonvested shares	554	509	321
Granted , Nonvested shares	963	405	267
Vested , Nonvested shares	(217)	(92)	(17)
Forfeited , Nonvested shares	(49)	(268)	(62)
Ending balance , Nonvested shares	1,251	554	509
Beginning balance ,Weighted average grant date fair value	$ 9.75	$ 9.64	$ 9.55
Granted ,Weighted average grant date fair value	5.21	9.88	9.76
Vested , Weighted average grant date fair value	9.50	9.78	10.24
Forfeited , Weighted average grant date fair value	9.80	9.70	9.64
Ending balance , Weighted average grant date fair value	$ 6.30	$ 9.75	$ 9.64

Pension and Employee Benefit Plans - Schedule of Changes in Projected Benefit Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in projected benefit obligation:
Service cost		$ 415	$ 447
Interest cost	$ 1,190	1,314	1,426
Change in plan assets:
Fair value of plan assets at beginning of year	26,836
Fair value of plan assets at end of year	24,197	26,836
Other comprehensive (loss) income:
Amount recognized in accumulated other comprehensive (loss) income - Prior service cost	$ (6,245)	$ (5,161)	$ (5,083)	$ (5,170)
Weighted-average assumptions used to determine benefit obligations for the year ended December 31:
Discount rate	3.35%	3.85%	4.00%
Pension Benefits [Member]
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 36,327	$ 35,012	$ 36,140
Service cost		415	447
Interest cost	1,190	1,314	1,426
Actuarial (gain) / loss	(2,629)	1,787	301
Administrative expenses		(402)	(606)
Benefits paid	(1,890)	(1,799)	(2,696)
Projected benefit obligation at end of year	32,998	36,327	35,012
Change in plan assets:
Fair value of plan assets at beginning of year	26,836	24,063	25,296
Actual (loss) return on plan assets	(1,388)	3,152	2,040
Employer contribution	639	1,822	29
Administrative expenses		(402)	(606)
Benefits paid	(1,890)	(1,799)	(2,696)
Fair value of plan assets at end of year	24,197	26,836	24,063
Unfunded status	(8,801)	(9,491)	(10,949)
Defined benefit liability included in other liabilities	(8,801)	(9,491)	(10,949)
Deferred tax benefit associated with accumulated other comprehensive loss	2,116	3,153	3,107
Accumulated other comprehensive loss, net of tax	6,224	5,154	5,074
Other comprehensive (loss) income:
Net loss (gain)	271	358	90
Amortization of net actuarial gain	(238)	(227)	(212)
Total recognized in other comprehensive (loss) income	33	131	(122)
Amount recognized in accumulated other comprehensive (loss) income - Prior service cost	$ 8,340	$ 8,307	$ 8,181
Weighted-average assumptions used to determine benefit obligations for the year ended December 31:
Discount rate	4.05%	3.35%	3.85%

Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Service cost		$ 415	$ 447
Interest cost	$ 1,190	1,314	1,426
Expected return on plan assets	(1,511)	(1,723)	(1,829)
Net amortization and deferral	238	227	212
Net periodic benefit cost (income)	$ (83)	$ 233	$ 256

Pension and Employee Benefit Plans - Weighted-average Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Discount rate	3.35%	3.85%	4.00%
Expected return on assets	5.75%	7.25%	7.50%

Pension and Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit And Contribution Plan Disclosure [Line Items]
Current Assets Mix percentage	100.00%	100.00%
Assumed average annual returns	5.75%	7.25%	7.50%
Listing under plans Forms 5500 as providing more than 5% contribution	false
Liability has been provided in the accompanying consolidated financial statements	$ 0
Amounts charged to pension expense	1,400,000	$ 2,000,000	$ 2,100,000
Aggregate matching contributions and discretionary contributions Amount	$ 1,700,000	$ 1,600,000	$ 1,500,000
Employee Deferral Category One [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Profit sharing and 401(k) savings retirement plan for non-union employees Description	The plan covers substantially all employees who have 30 days of service, and who have attained 18 years of age.
Percentage of Employee salary deferral provision	100.00%
Yellow Zone
Defined Benefit And Contribution Plan Disclosure [Line Items]
Plans Funded Status Description	Between 65 and less than 80 percent
Red Zone
Defined Benefit And Contribution Plan Disclosure [Line Items]
Plans Funded Status Description	Less than 65 percent
Green Zone
Defined Benefit And Contribution Plan Disclosure [Line Items]
Plans Funded Status Description	At least 80 percent
Pension Plan [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Net loss for the defined benefit pension plan to be amortized in next year	$ 200,000
Estimated pension plan cash obligations payable in 2019	2,100,000
Estimated pension plan cash obligations payable in 2020	2,100,000
Estimated pension plan cash obligations payable in 2021	2,100,000
Estimated pension plan cash obligations payable in 2022	2,100,000
Estimated pension plan cash obligations payable in 2023	2,100,000
Estimated pension plan cash obligations payable in 2024 through 2028	10,500,000
Health Care Plan [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Net loss for the defined benefit pension plan to be amortized in next year	$ 0
Minimum [Member] \| Debt Securities [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Current Assets Mix percentage	30.00%
Assumed average annual returns	4.00%
Minimum [Member] \| Equity Securities [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Current Assets Mix percentage	60.00%
Assumed average annual returns	8.00%
Maximum [Member] \| Debt Securities [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Current Assets Mix percentage	40.00%
Assumed average annual returns	6.00%
Maximum [Member] \| Equity Securities [Member]
Defined Benefit And Contribution Plan Disclosure [Line Items]
Current Assets Mix percentage	70.00%
Assumed average annual returns	12.00%

Pension and Employee Benefit Plans - Details of Defined Benefit Pension Plan Asset Allocation by Asset Category (Detail)	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Percentage of Plan Assets	100.00%	100.00%
Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.00%
Percentage of Plan Assets	3.00%	4.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	70.00%
Percentage of Plan Assets	70.00%	70.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	30.00%
Percentage of Plan Assets	27.00%	26.00%

Pension and Employee Benefit Plans - Disclosure of Fair Value Measurements of Pension Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	$ 24,197	$ 26,836
Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	16,994	18,722
Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	6,518	6,967
Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	24,197	26,836
Level 1 [Member] \| Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	16,994	18,722
Level 1 [Member] \| Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	6,518	6,967
Cash and cash equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	685	1,147
Cash and cash equivalents [Member] \| Level 1 [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Pension assets, at fair value	$ 685	$ 1,147

Pension and Employee Benefit Plans - Summary of Pension Fund General Information (Detail)	12 Months Ended
	Dec. 31, 2018
Sheet Metal Workers' National Pension Fund [Member]
Multiemployer Plans [Line Items]
EIN/Pension Number	526112463
Plan Number	001
Pension Protection Act Zone Status	Yellow
FIP/RP Status Pending/Implemented	Implemented
Surcharge Imposed	No
Expiration of Collective Bargaining Agreement	various
Sheet Metal Workers Local Two Two Four Pension Plan [Member]
Multiemployer Plans [Line Items]
EIN/Pension Number	316171353
Plan Number	001
Pension Protection Act Zone Status	Yellow
FIP/RP Status Pending/Implemented	Implemented
Surcharge Imposed	No
Expiration of Collective Bargaining Agreement	May 31, 2022
Sheet Metal Workers Local Twenty Indianapolis Area Pension Fund [Member]
Multiemployer Plans [Line Items]
EIN/Pension Number	510168516
Plan Number	001
Pension Protection Act Zone Status	Green
FIP/RP Status Pending/Implemented	NA
Surcharge Imposed	No
Expiration of Collective Bargaining Agreement	May 31, 2020
Sheet Metal Workers Local One Seven Seven Pension Fund [Member]
Multiemployer Plans [Line Items]
EIN/Pension Number	626093256
Plan Number	001
Pension Protection Act Zone Status	Green
FIP/RP Status Pending/Implemented	NA
Surcharge Imposed	No
Expiration of Collective Bargaining Agreement	May 1, 2019

Leases - Additional Information (Detail) $ in Thousands		12 Months Ended
Leases - Additional Information (Detail) $ in Thousands	Jun. 30, 2018	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) Facility
Leases Disclosure [Line Items]
Net proceeds from sale and leaseback agreement		$ 800		$ 14,244
Rent expense		3,700	$ 4,200	$ 4,500
Financing Transaction
Leases Disclosure [Line Items]
Number of facility for sale \| Facility				1
Gross proceeds from sale and leaseback agreement				$ 5,000
Sale leaseback transaction costs				300
Net proceeds from sale and leaseback agreement				$ 4,700
Initial lease agreement period				13 years
Amended lease agreement term				2031-06
Weighted average effective interest rate of sale leaseback financing liability				4.53%
Sale leaseback transaction, net carrying value		$ 10,200	$ 11,000
Capital Leases [Member]
Leases Disclosure [Line Items]
Number of facility for sale \| Facility				2
Gross proceeds from sale and leaseback agreement				$ 9,300
Sale leaseback transaction costs				500
Net proceeds from sale and leaseback agreement				$ 8,800
Lease agreement period				13 years
Sale Leaseback Transaction Lease Amendment Extended Term	2030-08
Gain on sale of facility				$ 4,400
Capital lease obligations				$ 8,700
Capital Leases [Member] \| Maximum [Member]
Leases Disclosure [Line Items]
Capital lease weighted average interest rates				4.67%
Capital Leases [Member] \| Minimum [Member]
Leases Disclosure [Line Items]
Capital lease weighted average interest rates				4.26%

Leases - Schedule of Future Payment on Sale-leaseback Financing Liability (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 414
2020	422
2021	431
2022	439
2023	448
Thereafter	3,658
Total payments	5,812
Less amount representing interest	(1,431)
Total liability	4,381
Less current portion, included in accounts payable and accrued expenses	(220)
Long-term portion included, in other liabilities	$ 4,161

Leases - Schedule of Future Minimum Payments for Capital Leases (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 838
2020	855
2021	872
2022	889
2023	907
Thereafter	6,407
Total payments	10,768
Less amount representing interest	(2,433)
Present value of future minimum lease payments	8,335
Less current portion, included in accounts payable and accrued expenses	(478)
Long-term portion, included in other liabilities	$ 7,857

Leases- Schedule of Capital Lease Assets Included in Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2017
Leases [Abstract]
Building and improvements, net of deferred gain	$ 4,385	$ 4,385
Less: Accumulated depreciation	(850)	(534)
Total	$ 3,535	$ 3,851
Depreciable life (years)	13 years

Leases- Summary of Future Annual Minimum Rental Commitments Under Non-Cancellable Operating Lease (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 2,745
2020	1,880
2021	1,454
2022	931
2023	851
2024 and thereafter	2,278
Operating Leases, Future Minimum Payments Due, Total	$ 10,139

Commitments and Contingencies - Additional Information (Detail)	12 Months Ended	204 Months Ended
	Dec. 31, 2018 USD ($) Case	Dec. 31, 2018 USD ($) Case	Dec. 31, 2017 Case
Commitments And Contingencies Disclosure [Abstract]
Cumulative settlement payments for cases involving asbestos-related claims \| $		$ 2,900,000
Cumulative settlement payments made for cases involving asbestos-related claims with all legal fees other than corporate counsel expenses \| $		2,700,000
Average cost per settled claim excluding legal fees \| $	$ 36,000	$ 36,000
Number of claims pending	208	208	218
Number of new cases filed	96
Number of cases dismissed	63
Number of cases settled	43
Assessment regarding Loss contingency impact Description	We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows.

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
U.S. federal corporate statutory tax rate	21.00%	35.00%
Provisional amount recorded related to deemed repatriation of foreign earnings	$ 1,713	$ (6,426)
Liability for deferred taxes on undistributed foreign earnings	$ 551
State and local net operating loss carry forwards year start	2019
State and local net operating loss carry forwards year end	2038
Tax credit carry-forwards	$ 2,352	1,634
Valuation reserve	5,500	3,900
Additional income tax expense (benefit)	$ 1,500	1,000	$ 200
Income tax positions recognized, minimum percentage	50.00%
Expense for interest and penalties	$ 300	300	$ 200
Maximum [Member]
Income Taxes [Line Items]
Decrease in amount of accrual for uncertain tax positions	500
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Net operating loss carry forward	29,400
Overseas Jurisdictions [Member]
Income Taxes [Line Items]
Net operating loss carry forward	$ 11,500
Tax credit carry-forwards		$ 1,100
Federal Authorities [Member]
Income Taxes [Line Items]
Open tax years	2014 2015 2016 2017 2018
State and Foreign Authorities [Member]
Income Taxes [Line Items]
Open tax years	2013 2014 2015 2016 2017 2018

Income Taxes - Schedule of Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments [Abstract]
Domestic	$ 6,230	$ 3,891	$ (39,623)
Foreign	(3,733)	(2,482)	6,659
Income (loss) before income taxes	$ 2,497	$ 1,409	$ (32,964)

Income Taxes - Schedule of Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 5,166	$ 6,234	$ 4,957
State	1,660	388	892
Foreign	2,834	939	3,191
Current Income Tax Expense (Benefit), Total	9,660	7,561	9,040
Deferred:
Federal	1,144	(2,479)	(2,794)
State	56	114	(409)
Foreign	(1,242)	(758)	(547)
Deferred income tax expense (benefit)	(42)	(3,123)	(3,750)
Income tax provision from continuing operations	$ 9,618	$ 4,438	$ 5,290

Income Taxes - Schedule of Reconciliation of Income Tax Provision and Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax expense (benefit) at statutory rate	$ 524	$ 494	$ (11,525)
Increase (decrease) in tax resulting from:
State income tax, net of federal benefit	1,337	367	174
Domestic production activities deduction		(235)	(561)
Intangible asset and goodwill impairment		1,789	17,859
Change in uncertain tax position reserves	73	465	(624)
Permanent differences related to divestitures	7,048
Permanent differences	693	1,026	(31)
Impact of rate differences and adjustments	57	(20)	(1,655)
United States and foreign tax incentives	(1,443)	(240)	(1,035)
Earnout (income) expense	(69)	(1,779)	2,573
Change in valuation allowance	1,521	1,044	222
Revaluation of deferred tax assets and liabilities		(4,819)
Net deemed distribution on repatriation of foreign earnings	(1,713)	6,426
Foreign withholding taxes on repatriation of foreign earnings	666
Other	924	(80)	(107)
Income tax provision from continuing operations	$ 9,618	$ 4,438	$ 5,290

Income Taxes - Schedule of Net Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Gross deferred tax assets:
Accrued expenses and other	$ 417	$ 286
Reserves on assets	1,276	2,000
Share-based compensation awards	459	436
Minimum pension	2,153	2,318
Net operating loss carry-forwards	3,478	3,471
Tax credit carry-forwards	2,352	1,634
Valuation allowances	(5,474)	(3,873)
Total Deferred Tax Assets	4,661	6,272
Gross deferred tax liabilities:
Depreciation	(646)	(448)
Goodwill and intangibles	(10,907)	(13,588)
Prepaid expenses and inventory	(798)	(585)
Withholding tax on unremitted foreign earnings	(551)
Revenue recognition	(514)	(1,861)
Total Deferred Tax Liabilities	(13,416)	(16,482)
Net deferred tax liabilities	$ (8,755)	$ (10,210)

Income Taxes - Schedule of Reconciliation of Uncertain Tax Position (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Roll Forward
Balance as of January 1	$ 866	$ 401
Additions for tax positions taken in prior years	73	465
Balance as of December 31	$ 939	$ 866

Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Common stock, shares issued		34,953,825	34,707,924
Rent expense		$ 3,700,000	$ 4,200,000	$ 4,500,000
Adwest Technologies, Inc. ('Adwest') [Member]
Related Party Transaction [Line Items]
Rent expense paid to former owner		0
Common Stock [Member]
Related Party Transaction [Line Items]
Common stock, shares issued	89,640			89,640
Share purchased				105,000
Common Stock [Member] \| Current Segment President [Member]
Related Party Transaction [Line Items]
Share purchased	75,000			75,000
Adwest, Zhongli, and Emtrol Subsidiaries [Member]
Related Party Transaction [Line Items]
Rent expense		600,000	600,000	$ 1,100,000
Zhongli Subsidiary [Member]
Related Party Transaction [Line Items]
Purchase of inventory		300,000	800,000	800,000
Sale of inventory		100,000	100,000	0
Consulting Services [Member] \| Related Party One [Member]
Related Party Transaction [Line Items]
Rent and other expenses paid		200,000	300,000	400,000
Consulting Services [Member] \| Related Party Two [Member]
Related Party Transaction [Line Items]
Rent and other expenses paid		$ 100,000	$ 100,000	$ 100,000

Acquisition of Noncontrolling Interest - (PMFG) - Additional Information (Detail) - Peerless Propulsys [Member] - PMFG, Inc. [Member] - USD ($) $ in Millions		12 Months Ended
	Jul. 11, 2016	Dec. 31, 2018
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		60.00%
Percentage of ownership by parent in net income loss		80.00%
Promissory note issued in exchange for ownership in equity	$ 5.3
Promissory note due date	Jul. 11, 2019
Ownership interest in the equity and earnings	100.00%
Business combination acquisition of minority interest caring value	$ 4.1
Fair value of noncontrolling interest	5.3
Additional paid in capital noncontrolling interest excess payment for existing equity investment	$ 1.2
Notes payable amount outstanding		$ 1.7
Notes payable description		As of December 31, 2018, the outstanding balance of the note was $1.7 million and was paid off in January 2019.
Interest rate		1.50%

Divestitures - Additional Information (Detail) - USD ($) $ in Thousands				12 Months Ended
	Nov. 27, 2018	Mar. 30, 2018	Feb. 28, 2018	Dec. 31, 2018	Dec. 31, 2017
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on disposal				$ (4,390)
Strobic Air Corporation [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price, subject to post-closing purchase price adjustments		$ 28,500
Gain (loss) on disposal		6,900
Net proceeds after adjustments		27,900
Net assets disposed		18,800
Transaction-related cost		2,200
Goodwill		13,000
Net sales					$ 17,700
Income from operations					$ 1,600
Strobic Air Corporation [Member] \| Definite-Lived Intangible Assets [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets		2,300
Strobic Air Corporation [Member] \| Indefinite-Lived Intangible Assets [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets		$ 1,200
Keystone Filter [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price, subject to post-closing purchase price adjustments			$ 7,500
Gain (loss) on disposal			4,300
Net proceeds after adjustments			7,200
Net assets disposed			2,700
Transaction-related cost			$ 200
Zhongli [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) on disposal	$ (15,100)
Disposal group, consideration receivable	$ 3,600

Business Segment Information - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016
Segment Reporting Information [Line Items]
Sales outside country, percentage	33.00%	32.00%	37.00%
Europe [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	11.00%
Long lived assets located outside country	$ 14.5
Asia [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	11.50%
Middle East and Africa [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	6.20%
Outside United States [Member]
Segment Reporting Information [Line Items]
Long lived assets located outside country	$ 19.1	$ 29.7
Net Sales [Member] \| Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Major customer	10.00%	10.00%	10.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Major customer	10.00%	10.00%	10.00%
CECO Group, Inc. [Member]
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment	3

Business Segment Information - Net Sales and Income (Loss) from Operation by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 93,854	$ 88,256	$ 81,089	$ 74,139	$ 73,543	$ 84,987	$ 93,870	$ 92,651	$ 337,339	$ 345,051	$ 417,011
Income (loss) from operations									10,002	8,024	(25,562)
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									211,185	188,955	254,806
Income (loss) from operations									28,398	14,565	30,582
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									75,414	87,838	101,909
Income (loss) from operations									5,635	8,123	8,481
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									50,740	69,159	61,788
Income (loss) from operations									8,402	14,736	(36,209)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net sales										(901)	(1,492)
Income (loss) from operations									$ (32,433)	(26,649)	(26,817)
Inter-segment Elimination [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations										$ (2,751)	$ (1,599)

Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Property and equipment additions	$ 3,090	$ 1,028	$ 5,461
Depreciation and amortization	13,272	16,088	18,903
Identifiable assets	392,582	438,549
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	205	444	672
Depreciation and amortization	8,112	9,675	11,557
Identifiable assets	245,842	258,218
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	756	160	301
Depreciation and amortization	1,067	1,488	1,814
Identifiable assets	54,179	66,723
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	1,226	382	4,481
Depreciation and amortization	3,517	4,754	5,406
Identifiable assets	73,910	100,917
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	903	42	7
Depreciation and amortization	576	171	$ 126
Identifiable assets	$ 18,651	$ 12,691

Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Parenthetical) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Non-cash additions for property, plant and equipment acquired under capital leases	$ 4,385
Fluid Handling and Filtration Segment [Member]
Segment Reporting Information [Line Items]
Non-cash additions for property, plant and equipment acquired under capital leases	$ 4,385

Business Segment Information - Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Goodwill	$ 152,156	$ 166,951	$ 170,153
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	97,930	98,408	101,610
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	22,419	22,419	$ 22,419
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 31,807	$ 46,124

Business Segment Information - Intra-Segment and Inter-Segment Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 93,854	$ 88,256	$ 81,089	$ 74,139	$ 73,543	$ 84,987	$ 93,870	$ 92,651	$ 337,339	$ 345,051	$ 417,011
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									211,185	188,955	254,806
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									75,414	87,838	101,909
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									50,740	69,159	61,788
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net sales										(901)	(1,492)
Intra - Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(12,479)	(15,237)	(9,476)
Intra - Segment Sales [Member] \| Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									(7,912)	(8,833)	(3,506)
Intra - Segment Sales [Member] \| Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									(3,084)	(3,235)	(4,256)
Intra - Segment Sales [Member] \| Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									(1,483)	(3,169)	(1,714)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									352,319	363,464	432,566
Operating Segments [Member] \| Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									220,334	197,897	258,710
Operating Segments [Member] \| Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									79,139	91,915	109,524
Operating Segments [Member] \| Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales									52,846	73,652	64,332
Inter-segment Elimination [Member] \| Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(1,848)	(601)	(715)
Inter-segment Elimination [Member] \| Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(607)	(1,619)	(3,666)
Inter-segment Elimination [Member] \| Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(46)	(55)	(206)
Inter-segment Elimination [Member] \| Corporate And Other Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales										(901)	(1,492)
Inter-segment Elimination [Member] \| Energy Solutions Segment [Member] \| Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(1,232)	(109)	(398)
Inter-segment Elimination [Member] \| Energy Solutions Segment [Member] \| Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(5)
Inter-segment Elimination [Member] \| Industrial Solutions Segment [Member] \| Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(600)	(787)	(3,153)
Inter-segment Elimination [Member] \| Industrial Solutions Segment [Member] \| Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(41)	(55)	(206)
Inter-segment Elimination [Member] \| Fluid Handling Solutions Segment [Member] \| Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									(616)	(492)	(317)
Inter-segment Elimination [Member] \| Fluid Handling Solutions Segment [Member] \| Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales									$ (7)	(832)	(513)
Inter-segment Elimination [Member] \| Corporate and Other [Member] \| Corporate And Other Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales										$ (901)	$ (1,492)

Quarterly Data (Unaudited) - Schedule of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 93,854	$ 88,256	$ 81,089	$ 74,139	$ 73,543	$ 84,987	$ 93,870	$ 92,651	$ 337,339	$ 345,051	$ 417,011
Gross profit	29,777	28,674	27,525	25,561	25,646	27,133	28,486	31,929	$ 111,537	$ 113,194	$ 134,859
Net income (loss) attributable to CECO Environmental Corp.	$ 931	$ (12,915)	$ (901)	$ 5,763	$ (11,589)	$ 3,036	$ 5,486	$ 38
Basic earnings (loss) per share	$ 0.03	$ (0.37)	$ (0.03)	$ 0.17	$ (0.34)	$ 0.09	$ 0.16	$ 0.00	$ (0.21)	$ (0.09)	$ (1.12)
Diluted earnings (loss) per share	$ 0.03	$ (0.37)	$ (0.03)	$ 0.17	$ (0.34)	$ 0.09	$ 0.16	$ 0.00	$ (0.21)	$ (0.09)	$ (1.12)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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