Aegion 10-Q 1 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 26, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	Aegion Corp
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		33,962,673
Amendment Flag	false
Entity Central Index Key	353,020
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues	$ 308,524	$ 356,595	$ 900,118	$ 1,002,857
Cost of revenues	242,206	279,474	718,196	794,493
Gross profit	66,318	77,121	181,922	208,364
Operating expenses	45,277	51,554	146,808	157,964
Acquisition-related expenses	324	457	2,059	780
Restructuring charges	212	172	8,544	1,034
Operating income	20,505	24,938	24,511	48,586
Other income (expense):
Interest expense	(3,825)	(3,144)	(11,081)	(9,365)
Interest income	37	25	197	229
Other	288	(359)	(1,183)	(2,360)
Total other expense	(3,500)	(3,478)	(12,067)	(11,496)
Income before taxes on income	17,005	21,460	12,444	37,090
Taxes on income	5,218	6,237	1,413	11,647
Net income	11,787	15,223	11,031	25,443
Non-controlling interests (income) loss	280	(473)	666	(650)
Net income attributable to Aegion Corporation	$ 12,067	$ 14,750	$ 11,697	$ 24,793
Earnings per share attributable to Aegion Corporation:
Net income (loss) per share, basic (in dollars per share)	$ 0.35	$ 0.41	$ 0.33	$ 0.68
Net income (loss) per share, diluted (in dollars per share)	$ 0.34	$ 0.40	$ 0.33	$ 0.67

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 11,787	$ 15,223	$ 11,031	$ 25,443
Other comprehensive income (loss):
Currency translation adjustments		3,885	(2,963)	2,928	(21,438)
Pension activity, net of tax	[1]	90	16	(83)	12
Deferred gain (loss) on hedging activity, net of tax	[2]	895	(274)	(3,163)	110
Total comprehensive income		16,657	12,002	10,713	4,127
Comprehensive (income) loss attributable to non-controlling interests		365	(700)	593	791
Comprehensive income attributable to Aegion Corporation		17,022	11,302	11,306	4,918
Pension activity, tax (benefit) expense		23	4	(21)	3
Deferred gain on hedging activity, tax		$ 617	$ (183)	$ (2,100)	$ 74
[1]	Amounts presented net of tax of $23 and $4 for the quarters ended September 30, 2016 and 2015, respectively, and $(21) and $3 for the nine months ended September 30, 2016 and 2015, respectively.
[2]	Amounts presented net of tax of $617 and $(183) for the quarters ended September 30, 2016 and 2015, respectively, and $(2,100) and $74 for the nine months ended September 30, 2016 and 2015, respectively.

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 113,264	$ 209,253
Restricted cash	5,357	5,796
Receivables, net of allowances of $7,235 and $14,524, respectively	191,960	200,883
Retainage	34,661	37,285
Costs and estimated earnings in excess of billings	85,306	89,141
Inventories	62,805	47,779
Prepaid expenses and other current assets	68,787	66,999
Assets held for sale	0	21,060
Total current assets	562,140	678,196
Property, plant & equipment, less accumulated depreciation	158,276	144,833
Other assets
Goodwill	300,679	249,120
Identified intangible assets, less accumulated amortization	199,352	174,118
Deferred income tax assets	3,411	2,130
Other assets	6,276	5,616
Total other assets	509,718	430,984
Total Assets	1,230,134	1,254,013
Current liabilities
Accounts payable	69,183	72,732
Accrued expenses	94,419	112,951
Billings in excess of costs and estimated earnings	90,873	87,475
Current maturities of long-term debt and line of credit	17,644	17,648
Liabilities held for sale	0	6,961
Total current liabilities	272,119	297,767
Long-term debt, less current maturities	357,142	333,480
Deferred income tax liabilities	20,665	19,386
Other non-current liabilities	12,411	8,824
Total liabilities	662,337	659,457
Commitments and contingencies
Equity
Preferred stock, undesignated, $.10 par – shares authorized 2,000,000; none outstanding	0	0
Common stock, $.01 par – shares authorized 125,000,000; shares issued and outstanding 34,139,540 and 36,053,499, respectively	341	361
Additional paid-in capital	171,053	199,951
Retained earnings	437,271	425,574
Accumulated other comprehensive loss	(48,252)	(47,861)
Total stockholders’ equity	560,413	578,025
Non-controlling interests	7,384	16,531
Total equity	567,797	594,556
Total Liabilities and Equity	$ 1,230,134	$ 1,254,013

Consolidated Balance Sheets (U5

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 7,235	$ 14,524
Preferred stock, undesignated, par (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, undesignated, shares authorized (in Shares)	2,000,000	2,000,000
Preferred stock, undesignated, shares outstanding (in Shares)	0	0
Common stock, par (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	125,000,000	125,000,000
Common stock, shares issued (in shares)	34,139,540	36,053,499
Common stock, shares outstanding (in Shares)	34,139,540	36,053,499

Consolidated Statements of Equi

Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common StockRestricted Stock Units	Additional Paid-In Capital	Additional Paid-In CapitalRestricted Stock Units	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non- Controlling Interests
Balance at Dec. 31, 2014	$ 645,085	$ 374		$ 217,289		$ 433,641	$ (24,669)	$ 18,450
Balance (in shares) at Dec. 31, 2014		37,360,515
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	25,443					24,793		650
Issuance of common stock upon stock option exercises	1,092	$ 1		1,091
Issuance of common stock upon stock option exercises (in shares)		109,344
Issuance of shares pursuant to restricted stock units (in shares)			12,326
Issuance of shares pursuant to deferred stock unit awards (in shares)		27,779
Forfeitures of restricted shares	(1)	$ (1)
Forfeitures of restricted shares (in shares)		(50,552)
Shares repurchased and retired	(21,941)	$ (12)		(21,929)
Shares repurchased and retired (in shares)		(1,212,181)
Equity-based compensation expense	6,847			6,847
Distributions to non-controlling interests	(472)							(472)
Currency translation adjustment and derivative transactions, net	(21,316)			0			(19,875)	(1,441)
Balance at Sep. 30, 2015	634,737	$ 362		203,298		458,434	(44,544)	17,187
Balance (in shares) at Sep. 30, 2015		36,247,231
Balance at Dec. 31, 2014	645,085	$ 374		217,289		433,641	(24,669)	18,450
Balance (in shares) at Dec. 31, 2014		37,360,515
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of non-controlling interest				0
Balance at Dec. 31, 2015	$ 594,556	$ 361		199,951		425,574	(47,861)	16,531
Balance (in shares) at Dec. 31, 2015	36,053,499	36,053,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 11,031					11,697		(666)
Issuance of common stock upon stock option exercises	$ 13	$ 0		13
Issuance of common stock upon stock option exercises (in shares)	18,193	18,193
Issuance of shares pursuant to restricted stock units	$ (23)				$ (23)
Issuance of shares pursuant to restricted stock units (in shares)			14,034
Issuance of shares pursuant to deferred stock unit awards (in shares)		39,660
Forfeitures of restricted shares	0	$ 0
Forfeitures of restricted shares (in shares)		(18,499)
Shares repurchased and retired	(36,597)	$ (20)		(36,577)
Shares repurchased and retired (in shares)		(1,967,347)
Equity-based compensation expense	7,689			7,689
Sale of non-controlling interest	(7,278)							(7,278)
Distributions to non-controlling interests	(1,276)							(1,276)
Currency translation adjustment and derivative transactions, net	(318)						(391)	73
Balance at Sep. 30, 2016	$ 567,797	$ 341		$ 171,053		$ 437,271	$ (48,252)	$ 7,384
Balance (in shares) at Sep. 30, 2016	34,139,540	34,139,540

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 11,031	$ 25,443
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	34,406	32,046
Gain on sale of fixed assets	(1,960)	(1,023)
Equity-based compensation expense	7,689	6,847
Deferred income taxes	(613)	1,799
Non-cash restructuring charges	300	2,127
Loss on sale of businesses	0	2,864
Loss on foreign currency transactions	1,351	284
Other	440	(860)
Changes in operating assets and liabilities (net of acquisitions):
Restricted cash related to operating activities	1,704	(2,215)
Receivables net, retainage and costs and estimated earnings in excess of billings	26,402	(24,738)
Inventories	(510)	3,514
Prepaid expenses and other assets	(3,094)	(17,374)
Accounts payable and accrued expenses	(41,698)	7,023
Billings in excess of costs and estimated earnings	212	31,979
Other operating	1,038	810
Net cash provided by operating activities	36,698	68,526
Cash flows from investing activities:
Capital expenditures	(31,485)	(21,337)
Proceeds from sale of fixed assets	3,083	1,706
Patent expenditures	(1,034)	(1,643)
Restricted cash related to investing activities	(1,086)	0
Purchase of Underground Solutions, Inc., net of cash acquired	(84,740)	0
Purchase of Fyfe Europe S.A. and related companies	(2,800)	0
Purchase of CIPP business of Leif M. Jensen A/S	(3,235)	0
Purchase of Concrete Solutions Limited and Building Chemical Supplies Limited	(5,532)	0
Purchase of Schultz Mechanical Contractors, Inc.	0	(6,878)
Sale of interest in Bayou Perma-Pipe Canada, Ltd., net of cash disposed	6,599	0
Payment to Fyfe Asia sellers for final net working capital	0	(1,098)
Net cash used in investing activities	(120,230)	(29,250)
Cash flows from financing activities:
Proceeds from issuance of common stock upon stock option exercises, including tax effects	37	1,299
Repurchase of common stock	(36,597)	(21,941)
Distributions to non-controlling interests	(1,276)	(472)
Payment of contingent consideration	(500)	(684)
Proceeds from notes payable	0	1,505
Principal payments on notes payable	0	(1,875)
Proceeds from line of credit	42,000	26,000
Payments on line of credit	(6,000)	0
Principal payments on long-term debt	(13,125)	(46,122)
Net cash used in financing activities	(15,461)	(42,290)
Effect of exchange rate changes on cash	561	(4,367)
Net decrease in cash and cash equivalents for the period	(98,432)	(7,381)
Cash and cash equivalents, beginning of period	209,253	174,965
Cash and cash equivalents, end of period	$ 113,264	$ 167,584

General

General	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	GENERAL The accompanying unaudited consolidated financial statements of Aegion Corporation and its subsidiaries (collectively, “Aegion” or the “Company”) reflect all adjustments (consisting only of normal recurring adjustments) that are, in the opinion of management, necessary for a fair statement of the Company’s financial position, results of operations and cash flows for the dates and periods presented. Results for interim periods are not necessarily indicative of the results to be expected during the remainder of the current year or for any future period. All significant intercompany related accounts and transactions have been eliminated in consolidation. The consolidated balance sheet as of December 31, 2015, which is derived from the audited consolidated financial statements, and the interim unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), the requirements of Form 10-Q and Article 10 of Regulation S-X and, consequently, do not include all information or footnotes required by GAAP for complete financial statements or all the disclosures normally made in an Annual Report on Form 10-K. Accordingly, the unaudited consolidated financial statements included herein should be read in conjunction with the audited consolidated financial statements and footnotes included in the Company’s 2015 Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 29, 2016. Acquisitions/Strategic Initiatives/Divestitures 2016 Restructuring On January 4, 2016, the Company’s board of directors approved a restructuring plan (the “2016 Restructuring”) to reduce the Company’s exposure to the upstream oil markets and to reduce consolidated expenses. As part of management’s ongoing assessment of its energy-related businesses, the Company determined that the persistent low price of oil was expected to create market challenges for the foreseeable future, including reduced customer spending in 2016. The Company substantially completed its 2016 Restructuring objectives in the first nine months of 2016, including repositioning Energy Services’ upstream operations in California, reducing Corrosion Protection’s upstream exposure by divesting its interest in a Canadian pipe coating joint venture, right-sizing Corrosion Protection to compete more effectively and reducing corporate and other operating costs. The 2016 Restructuring is expected to reduce consolidated annual expenses by approximately $17.0 million , most of which is expected to be realized in 2016, primarily through headcount reductions and office closures. See Note 3. Infrastructure Solutions Segment (“Infrastructure Solutions”) On July 1, 2016, the Company acquired Concrete Solutions Limited (“CSL”) and Building Chemical Supplies Limited (“BCS”), two New Zealand companies (collectively, “Concrete Solutions” ), for a purchase price paid at closing of NZD 7.5 million , approximately $5.4 million . The purchase price is subject to post-closing working capital adjustments and included NZD 0.5 million held in escrow as security for post-closing purchase price adjustments and post-closing indemnification obligations of the previous owners. The sellers have the ability to earn up to an additional NZD 2.0 million , approximately $1.4 million , of proceeds based on reaching certain performance targets in 2016, 2017 and 2018. The transaction was funded from the Company’s cash balances. CSL provides structural strengthening, concrete repair and bridge jointing solutions primarily through application of fiber reinforced polymer ( “FRP” ) and injection resins and had served as a Fibrwrap ® certified applicator in New Zealand for a number of years. BCS imports and distributes materials, including fiber reinforced polymer, injection resins, repair mortars and protective coatings . On June 2, 2016, the Company acquired the cured-in-place pipe (“CIPP”) contracting operations of Leif M. Jensen A/S (“LMJ”), a Danish company and the Insituform licensee in Denmark since 2011. The purchase price was €2.9 million , approximately $3.2 million , and was funded from the Company’s cash balances. On May 13, 2016, the Company acquired the operations and territories of Fyfe Europe S.A. and related companies (“Fyfe Europe”) for a purchase price of $3.0 million . The transaction was funded from the Company’s cash balances. Fyfe Europe held rights to provide Fibrwrap ® product engineering and support to installers and applicators of FRP systems in 72 countries throughout Europe, the Middle East and North Africa. The acquisition of these territories now provides the Company with worldwide rights to market, manufacture and install the patented Tyfo ® Fibrwrap ® FRP technology. On February 18, 2016, the Company acquired Underground Solutions, Inc. and its subsidiary, Underground Solutions Technologies Group, Inc. (collectively, “Underground Solutions”), for an initial purchase price of $85.0 million plus an additional $5.0 million for the value of the estimated tax benefits associated with Underground Solutions’ net operating loss carry forwards. The purchase price included $6.3 million held in escrow as security for the post-closing purchase price adjustments and post-closing indemnification obligations of Underground Solutions’ previous owners. The transaction was funded partially from the Company’s cash balances and partially from borrowings under the Company’s revolving credit facility. To supplement the domestic cash balances, the Company repatriated approximately $30.4 million from foreign subsidiaries to assist in funding the transaction, incurring approximately $3.5 million in additional taxes, a reserve for which was included in the Company’s tax provision amounts for 2015. Underground Solutions provides infrastructure technologies for water, sewer and conduit applications. In February 2015, the Company sold its wholly-owned subsidiary, Video Injection - Insituform SAS (“VII”), the Company’s French CIPP contracting operation, to certain employees of VII. In connection with the sale, the Company entered into a five -year exclusive tube supply agreement whereby VII will purchase liners from Insituform Linings Limited. VII will also be entitled to continue to use its trade name based on a trade mark license granted for the same five-year time period. The sale resulted in a loss of approximately $2.9 million that was recorded to other income (expense) in the Consolidated Statement of Operations during the first quarter of 2015. On October 6, 2014, the Company’s board of directors approved a realignment and restructuring plan (the “2014 Restructuring”) which included the decision to exit Insituform’s contracting markets in France, Switzerland, Hong Kong, Malaysia and Singapore. The Company has substantially completed all of the aforementioned objectives related to the 2014 Restructuring. See Note 3. Corrosion Protection Segment (“Corrosion Protection”) On February 1, 2016, the Company sold its fifty-one percent ( 51% ) interest in its Canadian pipe-coating joint venture, Bayou Perma-Pipe Canada, Ltd. (“BPPC”), to its joint venture partner, Perma-Pipe, Inc. The sale price was $9.6 million , which consisted of a $7.6 million payment at closing and a $2.0 million promissory note, which was paid on July 28, 2016. BPPC served as the Company’s pipe coating and insulation operation in Canada. The sale of its interest in BPPC was part of a broader effort by the Company to reduce its exposure in the North American upstream market in light of expectations for a prolonged low oil price environment. As a result of the sale, the Company recognized a pre-tax, non-cash charge of approximately $0.6 million at December 31, 2015 to reflect the expected loss on the sale of the business. This loss was derived primarily from the release of cumulative currency translation adjustments and was recorded to other income (expense) in the Consolidated Statement of Operations. In July 2015, the Company paid $0.7 million to the sellers of CRTS, Inc. (“CRTS”) related to contingent consideration achieved during the year ended December 31, 2013. Also, in June 2015, the Company finalized the settlement of escrow claims made pursuant to the CRTS purchase agreement. As a result of the settlement, the Company received proceeds of approximately $1.0 million in July 2015, of which $0.2 million was recorded as an offset to operating expenses and the remaining $0.8 million was recorded to other income (expense) in the Consolidated Statement of Operations for the nine months ended September 30, 2015. Energy Services Segment (“Energy Services”) On March 1, 2015, the Company acquired Schultz Mechanical Contractors, Inc. (“Schultz”), a California corporation, for a total purchase price of $7.7 million . The transaction was funded from the Company’s cash balances. Schultz primarily services customers in California and Arizona and is a provider of piping installations, concrete construction and excavation and trenching services to the downstream and upstream oil and gas markets. Purchase Price Accounting During the third quarter of 2016, the Company determined its preliminary accounting for Concrete Solutions and substantially completed its accounting for Underground Solutions, Fyfe Europe and LMJ, with the exception of final working capital adjustments. As the Company completes its final accounting for these acquisitions, future adjustments related to working capital, deferred income taxes, definite-lived intangible assets and goodwill could occur. Purchase price accounting related to Schultz was finalized in the first quarter of 2016. The goodwill and definite-lived intangible assets associated with the Schultz, Fyfe Europe and LMJ acquisitions are deductible for tax purposes; whereas, the goodwill and definite-lived intangible assets associated with the Underground Solutions and Concrete Solutions acquisitions are not deductible for tax purposes. Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz made the following contributions to the Company’s revenues and profits (in thousands): Quarter Ended September 30, 2016 Quarter Ended September 30, 2015 Underground Solutions (1) Fyfe LMJ Concrete Schultz (2) Schultz (3) Revenues $ 8,273 $ 15 $ 1,446 $ 1,344 $ 6,777 $ 3,718 Net income (loss) 101 (202 ) (134 ) 68 193 57 _____________________ (1) The reported net income for Underground Solutions for the quarter ended September 30, 2016 includes an allocation of corporate expenses of $0.3 million . (2) The reported net income for Schultz for the quarter ended September 30, 2016 includes an allocation of corporate expenses of $0.3 million . (3) The reported net income for Schultz for the quarter ended September 30, 2015 includes an allocation of corporate expenses of $0.2 million . Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Underground Solutions (1) Fyfe LMJ Concrete Schultz (2) Schultz (3) Revenues $ 23,916 $ 23 $ 2,779 $ 1,344 $ 17,098 $ 8,205 Net income (loss) (1,661 ) (300 ) (221 ) 68 (207 ) 31 _____________________ (1) The reported net loss for Underground Solutions for the nine months ended September 30, 2016 includes inventory step up expense of $3.6 million , recognized as part of the accounting for business combinations, and an allocation of corporate expenses of $1.6 million . (2) The reported net loss for Schultz for the nine months ended September 30, 2016 includes charges related to the 2016 Restructuring of $0.2 million and an allocation of corporate expenses of $0.6 million . (3) The reported net income for Schultz for the nine months ended September 30, 2015 includes an allocation of corporate expenses of $0.3 million . The following unaudited pro forma summary presents combined information of the Company as if the Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz acquisitions had occurred at the beginning of the year preceding their acquisition (in thousands, except earnings per share): Quarters Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 308,524 $ 373,710 $ 910,098 $ 1,044,248 Net income attributable to Aegion Corporation (1) 12,067 16,340 11,952 26,515 Diluted earnings per share $ 0.34 $ 0.45 $ 0.34 $ 0.72 _____________________ (1) Includes pro-forma adjustments for depreciation and amortization associated with acquired tangible and intangible assets, as if those assets were recorded at the beginning of the year preceding the acquisition date. The transaction purchase price to acquire Underground Solutions was $88.4 million , which included: (i) a payment at closing of $85.0 million ; (ii) net payment of $5.0 million for the value of the estimated tax benefits associated with Underground Solutions’ net operating loss carry forwards; and (iii) working capital adjustments of $1.6 million payable to the Company. The transaction purchase price to acquire Fyfe Europe was $3.0 million , which represented cash consideration paid at closing of $2.8 million plus $0.2 million of deferred contingent consideration, which was recorded to “Accrued expenses” in the Consolidated Balance Sheet at September 30, 2016. The transaction purchase price to acquire LMJ was €2.9 million , approximately $3.2 million , which was paid at closing. The transaction purchase price to acquire Concrete Solutions was NZD 8.9 million , approximately $6.4 million , which included: (i) a payment at closing of NZD 7.5 million , approximately $5.4 million ; (ii) a preliminary working capital adjustment of NZD 0.2 million , approximately $0.1 million (payable to the sellers); and (iii) the estimated fair value of earnout consideration of NZD 1.2 million , approximately $0.9 million , which was recorded to “Other non-current liabilities” in the Consolidated Balance Sheet at September 30, 2016. The fair value estimate was determined using observable inputs and significant unobservable inputs, which are based on level 3 inputs as defined in Note 12. Total cash consideration recorded to acquire Schultz was $6.7 million , which was funded by the Company’s cash reserves. The cash consideration included the purchase price paid at closing of $7.1 million less working capital adjustments of $0.4 million . The total purchase price was $7.7 million , which represented the cash consideration of $6.7 million plus $1.0 million of deferred contingent consideration. During the first quarter of 2016, $0.5 million of the contingent consideration was paid to the previous owners. The following table summarizes the fair value of identified assets and liabilities of the Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz acquisitions at their respective acquisition dates (in thousands): Underground Solutions Fyfe Europe LMJ Concrete Solutions Schultz Cash $ 3,630 $ — $ — $ — $ — Receivables and cost and estimated earnings in excess of billings 6,339 — — 1,469 1,086 Inventories 12,629 — 504 857 — Prepaid expenses and other current assets 587 — — 18 19 Property, plant and equipment 2,755 50 1,194 422 162 Identified intangible assets 33,370 513 795 1,722 3,060 Deferred income tax assets 12,906 — — — — Other assets 29 — — — — Accounts payable (4,653 ) — — (837 ) (663 ) Accrued expenses (5,481 ) — — (149 ) — Billings in excess of cost and estimated earnings (2,943 ) — — — — Deferred income tax liabilities (14,799 ) — — (482 ) — Total identifiable net assets $ 44,369 $ 563 $ 2,493 $ 3,020 $ 3,664 Total consideration recorded $ 88,370 $ 3,000 $ 3,235 $ 6,393 $ 7,662 Less: total identifiable net assets 44,369 563 2,493 3,020 3,664 Goodwill at September 30, 2016 $ 44,001 $ 2,437 $ 742 $ 3,373 $ 3,998

Accounting Policies

Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES Revenues Revenues include construction, engineering and installation revenues that are recognized using the percentage-of-completion method of accounting in the ratio of costs incurred to estimated final costs. Revenues from change orders, extra work and variations in the scope of work are recognized when it is probable that they will result in additional contract revenue and when the amount can be reliably estimated. Contract costs include all direct material and labor costs and those indirect costs related to contract performance, such as indirect labor, supplies, tools and equipment costs. The Company expenses all pre-contract costs in the period these costs are incurred. Since the financial reporting of these contracts depends on estimates, which are assessed continually during the term of these contracts, recognized revenues and profit are subject to revisions as the contract progresses to completion. Revisions in profit estimates are reflected in the period in which the facts that give rise to the revision become known. If material, the effects of any changes in estimates are disclosed in the notes to the consolidated financial statements. When estimates indicate that a loss will be incurred on a contract, a provision for the expected loss is recorded in the period in which the loss becomes evident. Any revenue recognized is only to the extent costs have been recognized in the period. Additionally, the Company expenses all costs for unpriced change orders in the period in which they are incurred. Revenues from the Company’s Energy Services segment are derived mainly from multiple engineering and construction type contracts, as well as maintenance contracts, under multi-year long-term master service agreements and alliance contracts. Businesses within the Company’s Energy Services segment enter into customer contracts that contain three principal types of pricing provisions: time and materials, cost plus fixed fee and fixed price. Although the terms of these contracts vary, most are made pursuant to cost reimbursable contracts on a time and materials basis under which revenues are recorded based on costs incurred at agreed upon contractual rates. These businesses also perform services on a cost plus fixed fee basis under which revenues are recorded based upon costs incurred at agreed upon rates and a proportionate amount of the fixed fee or percentage stipulated in the contract. Foreign Currency Translation Net foreign exchange transaction gains (losses) of $0.3 million and $0.1 million for the quarters ended September 30, 2016 and 2015 , respectively, and $(1.4) million and $(0.3) million for the nine months ended September 30, 2016 and 2015 , respectively, are included in other income (expense) in the Consolidated Statements of Operations. For the Company’s international subsidiaries, the local currency is generally the functional currency. Assets and liabilities of these subsidiaries are translated into U.S. dollars using rates in effect at the balance sheet date while revenues and expenses are translated into U.S. dollars using average exchange rates. The cumulative translation adjustment resulting from changes in exchange rates are included in the Consolidated Balance Sheets as a component of accumulated other comprehensive income (loss) in total stockholders’ equity. The Company’s accumulated other comprehensive income is comprised of three main components: (i) currency translation; (ii) derivatives; and (iii) gains and losses associated with the Company’s defined benefit plan in the United Kingdom. As of September 30, 2016 and 2015 , the Company had accumulated comprehensive income (loss) of $(43.2) million and $(44.5) million , respectively, related to currency translation adjustments; $(5.5) million and $(0.5) million , respectively, related to derivative transactions; and $0.5 million and $0.5 million , respectively, related to pension activity in accumulated other comprehensive income. Taxation The Company provides for estimated income taxes payable or refundable on current year income tax returns as well as the estimated future tax effects attributable to temporary differences and carryforwards, based upon enacted tax laws and tax rates, and in accordance with FASB ASC 740, Income Taxes (“FASB ASC 740”). FASB ASC 740 also requires that a valuation allowance be recorded against any deferred tax assets that are not likely to be realized in the future. Refer to Note 9 for additional information regarding taxes on income. Purchase Price Accounting The Company accounts for its acquisitions in accordance with FASB ASC 805, Business Combinations . The base cash purchase price plus the estimated fair value of any non-cash or contingent consideration given for an acquired business is allocated to the assets acquired (including identified intangible assets) and liabilities assumed based on the estimated fair values of such assets and liabilities. The excess of the total consideration over the aggregate net fair values assigned is recorded as goodwill. Contingent consideration, if any, is recognized as a liability as of the acquisition date with subsequent adjustments recorded in the consolidated statements of operations. Indirect and general expenses related to business combinations are expensed as incurred. The Company typically determines the fair value of tangible and intangible assets acquired in a business combination using independent valuations that rely on management’s estimates of inputs and assumptions that a market participant would use. Key assumptions include cash flow projections, growth rates, asset lives, and discount rates based on an analysis of weighted average cost of capital. Long-Lived Assets Property, plant and equipment and other identified intangibles (primarily customer relationships, patents and acquired technologies, trademarks, licenses and non-compete agreements) are recorded at cost, net of accumulated depreciation and impairment and, except for goodwill and certain trademarks, are depreciated or amortized on a straight-line basis over their estimated useful lives. Changes in circumstances such as technological advances, changes to the Company’s business model or changes in the Company’s capital strategy can result in the actual useful lives differing from the Company’s estimates. If the Company determines that the useful life of its property, plant and equipment or its identified intangible assets should be changed, the Company would depreciate or amortize the net book value in excess of the salvage value over its revised remaining useful life, thereby increasing or decreasing depreciation or amortization expense. Long-lived assets, including property, plant and equipment and other intangibles, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Such impairment tests are based on a comparison of undiscounted cash flows to the recorded value of the asset. The estimate of cash flow is based upon, among other things, assumptions about expected future operating performance. The Company’s estimates of undiscounted cash flow may differ from actual cash flow due to, among other things, technological changes, economic conditions, changes to its business model or changes in its operating performance. If the sum of the undiscounted cash flows (excluding interest) is less than the carrying value, the Company recognizes an impairment loss, measured as the amount by which the carrying value exceeds the fair value of the asset. Goodwill Acquisitions treated as a business combination generally result in goodwill related to, among other things, synergies, acquired workforce, growth opportunities and market potential. Under FASB ASC 350, the Company assesses recoverability of goodwill on an annual basis or when events or changes in circumstances indicate that the carrying amount of goodwill may not be recoverable. An impairment charge will be recognized to the extent that the implied fair value of a reporting unit is less than its carrying value. Factors that could potentially trigger an impairment review include (but are not limited to): • significant underperformance of a reporting unit relative to expected, historical or forecasted operating results; • significant negative industry or economic trends; • significant changes in the strategy for a segment including extended slowdowns in the reporting unit’s market; • a decrease in market capitalization below the Company’s book value; and • a significant change in regulations. Whether during the annual impairment assessment or during a trigger-based impairment review, the Company determines the fair value of its reporting units and compares such fair value to the carrying value of those reporting units to determine if there are any indications of goodwill impairment. Fair value of reporting units is determined using a combination of two valuation methods: a market approach and an income approach with each method given equal weight in determining the fair value assigned to each reporting unit. Absent an indication of fair value from a potential buyer or similar specific transaction, the Company believes the use of these two methods provides a reasonable estimate of a reporting unit’s fair value. Assumptions common to both methods are operating plans and economic outlooks, which are used to forecast future revenues, earnings and after-tax cash flows for each reporting unit. These assumptions are applied consistently for both methods. The market approach estimates fair value by first determining earnings before interest, taxes, depreciation and amortization (“EBITDA”) multiples for comparable publicly-traded companies with similar characteristics of the reporting unit. The EBITDA multiples for comparable companies are based upon current enterprise value. The enterprise value is based upon current market capitalization and includes a control premium. The Company believes this approach is appropriate because it provides a fair value estimate using multiples from entities with operations and economic characteristics comparable to its reporting units. The income approach is based on forecasted future (debt-free) cash flows that are discounted to present value using factors that consider timing and risk of future cash flows. The Company believes this approach is appropriate because it provides a fair value estimate based upon the reporting unit’s expected long-term operating cash flow performance. Discounted cash flow projections are based on financial forecasts developed from operating plans and economic outlooks, growth rates, estimates of future expected changes in operating margins, terminal value growth rates, future capital expenditures and changes in working capital requirements. Estimates of discounted cash flows may differ from actual cash flows due to, among other things, changes in economic conditions, changes to business models, changes in the Company’s weighted average cost of capital, or changes in operating performance. The discount rate applied to the estimated future cash flows is one of the most significant assumptions utilized under the income approach. The Company determines the appropriate discount rate for each of its reporting units based on the weighted average cost of capital (“WACC”) for each individual reporting unit. The WACC takes into account both the pre-tax cost of debt and cost of equity (a major component of the cost of equity is the current risk-free rate on twenty year U.S. Treasury bonds). As each reporting unit has a different risk profile based on the nature of its operations, including market-based factors, the WACC for each reporting unit may differ. Accordingly, the WACCs are adjusted, as appropriate, to account for company-specific risks associated with each reporting unit. Investments in Affiliated Companies Investments in entities in which the Company does not have control or is not the primary beneficiary of a variable interest entity, and for which the Company has 20% to 50% ownership or has the ability to exert significant influence, have historically been accounted for by the equity method. At September 30, 2016 and December 31, 2015 , the Company did not own any investments in affiliated companies. Investments in Variable Interest Entities The Company evaluates all transactions and relationships with variable interest entities (“VIE”) to determine whether the Company is the primary beneficiary of the entities in accordance with FASB ASC 810, Consolidation. The Company’s overall methodology for evaluating transactions and relationships under the VIE requirements includes the following two steps: • determine whether the entity meets the criteria to qualify as a VIE; and • determine whether the Company is the primary beneficiary of the VIE. In performing the first step, the significant factors and judgments that the Company considers in making the determination as to whether an entity is a VIE include: • the design of the entity, including the nature of its risks and the purpose for which the entity was created, to determine the variability that the entity was designed to create and distribute to its interest holders; • the nature of the Company’s involvement with the entity; • whether control of the entity may be achieved through arrangements that do not involve voting equity; • whether there is sufficient equity investment at risk to finance the activities of the entity; and • whether parties other than the equity holders have the obligation to absorb expected losses or the right to receive residual returns. If the Company identifies a VIE based on the above considerations, it then performs the second step and evaluates whether it is the primary beneficiary of the VIE by considering the following significant factors and judgments: • whether the entity has the power to direct the activities of a variable interest entity that most significantly impact the entity’s economic performance; and • whether the entity has the obligation to absorb losses of the entity that could potentially be significant to the variable interest entity or the right to receive benefits from the entity that could potentially be significant to the variable interest entity. Based on its evaluation of the above factors and judgments, as of September 30, 2016 , the Company consolidated any VIEs in which it was the primary beneficiary. Financial data for consolidated variable interest entities are summarized in the following table (in thousands): Balance sheet data September 30, (1) December 31, (2) Current assets $ 32,544 $ 60,730 Non-current assets 26,355 26,316 Current liabilities 9,187 24,784 Non-current liabilities 31,832 25,728 __________________________ (1) Amounts exclude the assets and liabilities of BPPC, which was sold in February 2016. (2) Amounts include $21.1 million of current assets and $7.0 million of current liabilities of BPPC, which were classified as held for sale. See Note 5. Nine Months Ended September 30, Income statement data 2016 (1) 2015 Revenue $ 35,409 $ 22,037 Gross profit 2,713 2,778 Net income (loss) (3,869 ) 144 __________________________ (1) Includes the results of BPPC through the date of its sale in February 2016. Newly Issued Accounting Pronouncements In August 2016, the FASB issued guidance to address diversity in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The standard is effective retroactively in fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its statement of cash flows. In March 2016, the FASB issued guidance that simplifies several aspects of the accounting for share-based payment awards to employees, including the accounting for income taxes, classification of awards as either equity or liabilities and classification in the statement of cash flows. The standard is effective for public companies for annual periods beginning after December 15, 2016, including interim periods within those fiscal years. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued guidance that requires lessees to present right-of-use assets and lease liabilities on the balance sheet. The standard is effective for public companies for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations. In November 2015, the FASB issued guidance that requires all deferred tax assets and liabilities, along with any related valuation allowance, to be presented as non-current within the Consolidated Balance Sheet. It is effective for annual reporting periods beginning after December 15, 2016, but early adoption is permitted. The Company currently reports both current and non-current deferred tax assets and liabilities; however, adoption of the guidance is not expected to have a material impact on its presentation of financial condition. In September 2015, the FASB issued guidance that requires acquirers in a business combination to recognize measurement period adjustments in the reporting period in which the adjustment amounts are determined. This is a change from the previous requirement that the adjustments be recorded retrospectively. The Company’s adoption of this standard, effective January 1, 2016, did not have a material impact on its consolidated financial statements. In August 2014, the FASB issued guidance that requires management to assess the Company’s ability to continue as a going concern and to provide related disclosures in certain circumstances. The standard is effective for public companies for annual periods beginning after December 15, 2016 and early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s presentation of, or disclosures in, its consolidated financial statements. In May 2014, the FASB issued guidance that supersedes revenue recognition requirements regarding contracts with customers to transfer goods or services or for the transfer of non-financial assets. Under the new guidance, entities are required to recognize revenue in order to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five-step analysis to be performed on transactions to determine when and how revenue is recognized. This new guidance is effective retroactively in fiscal years beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations.

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Restructuring	RESTRUCTURING 2016 Restructuring On January 4, 2016, the Company’s board of directors approved the 2016 Restructuring to reduce its exposure to the upstream oil markets and to reduce consolidated expenses. The Company substantially completed its 2016 Restructuring objectives in the first nine months of 2016, including repositioning Energy Services’ upstream operations in California, reducing Corrosion Protection’s upstream exposure by divesting its interest in a Canadian pipe coating joint venture, right-sizing Corrosion Protection to compete more effectively, and reducing corporate and other operating costs. The 2016 Restructuring is expected to reduce consolidated annual expenses by approximately $17.0 million , most of which is expected to be realized in 2016, primarily through headcount reductions and office closures. As part of the 2016 Restructuring, the Company reduced headcount by approximately 960 employees, or 15.5% of the Company’s total workforce as of December 31, 2015. Headcount reductions associated with the 2016 Restructuring were substantially completed as of September 30, 2016, with minimal headcount reductions expected in the remainder of the year. The Company expects to record total estimated pre-tax charges, most of which are cash charges, of approximately $15.5 million in connection with the 2016 Restructuring. Estimated remaining costs to be incurred for the 2016 Restructuring are approximately $0.7 million (pre-tax) and are expected to be incurred in the fourth quarter of 2016, primarily in Corrosion Protection. The estimated remaining costs consist primarily of cash charges related to office closures, employee severance, extension of benefits, employment assistance programs and other restructuring costs. Total pre-tax 2016 Restructuring charges during the first nine months of 2016 were $14.8 million ( $9.7 million after tax) and consisted primarily of cash charges. These charges included employee severance, retention, extension of benefits, employment assistance programs and other restructuring costs associated with the restructuring efforts described above. During the quarter and nine months ended September 30, 2016 , the Company recorded pre-tax expense related to the 2016 Restructuring as follows (in thousands): Quarter Ended September 30, 2016 Infrastructure Solutions Corrosion Protection Energy Services Total Severance and benefit related costs $ — $ 48 $ 98 $ 146 Relocation and other moving costs — — 66 66 Other restructuring costs (1) (31 ) 130 976 1,075 Total pre-tax restructuring charges (reversals) (2) $ (31 ) $ 178 $ 1,140 $ 1,287 __________________________ (1) Includes charges primarily related to downsizing the Company’s upstream operations in California, inclusive of wind-down costs, professional fees, fixed asset disposals and certain other restructuring charges. (2) Includes l ess than $0.1 million of corporate-related restructuring charges that have been allocated to the reportable segments. Nine Months Ended September 30, 2016 Infrastructure Solutions Corrosion Protection Energy Services Total Severance and benefit related costs $ 2,256 $ 3,182 $ 1,501 $ 6,939 Lease termination costs — — 969 969 Relocation and other moving costs 307 62 200 569 Other restructuring costs (1) 777 628 4,909 6,314 Total pre-tax restructuring charges (2) $ 3,340 $ 3,872 $ 7,579 $ 14,791 __________________________ (1) Includes charges primarily related to downsizing the Company’s upstream operations in California, inclusive of wind-down costs, professional fees, fixed asset disposals and certain other restructuring charges. (2) Includes $1.2 million of corporate-related restructuring charges that have been allocated to the reportable segments. 2016 Restructuring costs related to severance, other termination benefit costs and early lease termination costs for the quarter and nine months ended September 30, 2016 were $0.2 million and $8.5 million , respectively, and are reported, along with similar charges for the 2014 Restructuring, on a separate line in the Consolidated Statements of Operations in accordance with FASB ASC 420, Exit or Disposal Cost Obligations . The following tables summarize all charges related to the 2016 Restructuring recognized in the quarter and nine months ended September 30, 2016 as presented in their affected line in the Consolidated Statements of Operations (in thousands): Quarter Ended September 30, 2016 Nine Months Ended September 30, 2016 Non-Cash Restructuring Charges Cash Restructuring Charges (1) Total Non-Cash Restructuring Charges Cash Restructuring Charges (1) Total Cost of revenues (2) $ — $ 130 $ 130 $ — $ 189 $ 189 Operating expenses (3) 257 688 945 516 5,360 5,876 Restructuring charges (4) — 212 212 — 8,477 8,477 Other expense (5) — — — 249 — 249 Total pre-tax restructuring charges $ 257 $ 1,030 $ 1,287 $ 765 $ 14,026 $ 14,791 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) All charges for the quarter and nine-month period ended September 30, 2016 relate to Corrosion Protection. (3) Includes charges of less than $0.1 million and $0.5 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Infrastructure Solutions. Includes charges of zero and $0.4 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Corrosion Protection. Includes charges of $1.0 million and $4.9 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Energy Services. (4) Includes charges of zero and $2.6 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Infrastructure Solutions. Includes charges of less than $0.1 million and $3.2 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Corrosion Protection. Includes charges of $0.2 million and $2.7 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Energy Services. (5) All charges relate to the release of cumulative currency translation adjustments in Infrastructure Solutions. The following tables summarize the 2016 Restructuring activity during the first nine months of 2016 (in thousands): 2016 Utilized in 2016 Reserves at Cash (1) Non-Cash Severance and benefit related costs $ 6,939 $ 5,835 $ — $ 1,104 Lease termination costs 969 969 — — Relocation and other moving costs 569 569 — — Other restructuring costs 6,314 5,549 765 — Total pre-tax restructuring charges $ 14,791 $ 12,922 $ 765 $ 1,104 __________________________ (1) Refers to cash utilized to settle charges during the first nine months of 2016. 2014 Restructuring On October 6, 2014, the Company’s board of directors approved the 2014 Restructuring to improve gross margins and profitability over the long-term by exiting low-return businesses and reducing the size and cost of the Company’s overhead structure. The 2014 Restructuring generated annual operating cost savings of approximately $10.8 million , which was in-line with the Company’s initial estimate, and consisted of approximately $8.4 million and $2.4 million of recognized savings within Infrastructure Solutions and Corrosion Protection, respectively. The Company achieved these cost savings by (i) exiting certain unprofitable international locations for the Company’s Insituform business and consolidating the Company’s worldwide Fyfe business with the Company’s global Insituform business, all of which is in Infrastructure Solutions; and (ii) eliminating certain idle facilities in the Company’s Bayou pipe coating operation in Louisiana, which is in Corrosion Protection. The Company has substantially completed all of the aforementioned objectives related to the 2014 Restructuring. Headcount reductions associated with the 2014 Restructuring totaled 86 as of September 30, 2016 . Remaining headcount reductions and cash costs related to the 2014 Restructuring are not expected to be material. Total pre-tax 2014 Restructuring charges since inception were $60.0 million ( $44.6 million after tax) and consisted of non-cash charges totaling $48.3 million and cash charges totaling $11.7 million . The non-cash charges of $48.3 million included (i) $22.2 million related to the impairment of certain long-lived assets and definite-lived intangible assets for Bayou’s pipe coating operation in Louisiana; and (ii) $26.1 million related to impairment of definite-lived intangible assets, allowances for accounts receivable, write-off of certain other current assets and long-lived assets, inventory obsolescence, as well as losses related to the sales of the Company’s CIPP contracting operations in France and Switzerland, which are reported in Infrastructure Solutions. Cash charges totaling $11.7 million included employee severance, retention, extension of benefits, employment assistance programs and other costs associated with the restructuring of Insituform’s European and Asia-Pacific operations and Fyfe’s worldwide business. While estimated remaining cash costs to be incurred in 2016 for the 2014 Restructuring are not expected to be material, the Company expects to incur additional non-cash charges in 2016, primarily related to the potential release of cumulative currency translation adjustments resulting from the disposal of certain entities as well as the foreign currency impact from settlement of inter-company loans. All such charges will be recognized in Infrastructure Solutions. During the quarters and nine months ended September 30, 2016 and 2015 , the Company recorded pre-tax (income) expense related to the 2014 Restructuring as follows (in thousands): Quarters Ended Nine Months Ended 2016 2015 2016 2015 Severance and benefit related costs $ — $ 172 $ 67 $ 866 Lease termination costs — — — 168 Allowances for doubtful accounts (232 ) 339 (585 ) 1,630 Other restructuring costs (1) (131 ) 987 35 8,066 Total pre-tax restructuring charges (reversals) (2) $ (363 ) $ 1,498 $ (483 ) $ 10,730 __________________________ (1) The quarter and nine months ended September 30, 2015 include charges related to the write-off of certain other assets, including the loss on the sale of the CIPP contracting operation in France in February 2015, including the release of cumulative currency translation adjustments, professional fees and certain other restructuring charges. (2) All charges for the quarters and nine months ended September 30, 2016 and 2015 relate to Infrastructure Solutions. 2014 Restructuring costs related to severance, other termination benefit costs and early lease termination costs for the quarters ended September 30, 2016 and 2015 were zero and $0.2 million , respectively, and for the nine months ended September 30, 2016 and 2015 were $0.1 million and $1.0 million , respectively, and are reported, along with similar charges for the 2016 Restructuring, on a separate line in the Consolidated Statements of Operations in accordance with FASB ASC 420, Exit or Disposal Cost Obligations . The following tables summarize all charges related to the 2014 Restructuring recognized in the quarters and nine months ended September 30, 2016 and 2015 as presented in their affected line in the Consolidated Statements of Operations (in thousands): Quarters Ended September 30, 2016 2015 Non-Cash Cash Restructuring Charges (Reversals) (1) Total Non-Cash Cash (1) Total Cost of revenues $ — $ — $ — $ 1,678 $ (17 ) $ 1,661 Operating expenses (232 ) (130 ) (362 ) (829 ) 386 (443 ) Restructuring charges — — — — 172 172 Other expense (1 ) — (1 ) 66 42 108 Total pre-tax restructuring charges (reversals) (2) $ (233 ) $ (130 ) $ (363 ) $ 915 $ 583 $ 1,498 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) All charges relate to Infrastructure Solutions. Nine Months Ended September 30, 2016 2015 Non-Cash Cash Restructuring Charges (Reversals) (1) Total Non-Cash Cash (1) Total Cost of revenues $ — $ (14 ) $ (14 ) $ 1,546 $ 1,097 $ 2,643 Operating expenses (593 ) (71 ) (664 ) 441 3,748 4,189 Restructuring charges — 67 67 — 1,034 1,034 Other expense (2) 128 — 128 3,004 (140 ) 2,864 Total pre-tax restructuring charges (reversals) (3) $ (465 ) $ (18 ) $ (483 ) $ 4,991 $ 5,739 $ 10,730 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) Charges in the nine months ended September 30, 2015 primarily include the loss on sale of the CIPP contracting operation in France in February 2015, including the release of cumulative currency translation adjustments. (3) All charges relate to Infrastructure Solutions. The following tables summarize the 2014 Restructuring activity during the first nine months of 2016 and 2015 (in thousands): Utilized Reserves at December 31, 2015 Charge (Credit) to Income Foreign Currency Translation Cash (1) Non-Cash Reserves at September 30, 2016 Severance and benefit related costs $ — $ 67 $ — $ — $ — $ 67 Reserves for customer receivables (2) 6,605 (585 ) 45 — 3,739 2,326 Other restructuring costs 968 35 24 214 307 506 Total pre-tax restructuring charges (reversals) $ 7,573 $ (483 ) $ 69 $ 214 $ 4,046 $ 2,899 __________________________ (1) Refers to cash utilized to settle charges, either those reserved at December 31, 2015 or charged to income during the first nine months of 2016. (2) During the third quarter of 2016, the Company received payment on certain accounts receivable that were previously reserved. Additionally, the Company wrote off certain balances in costs and estimated earnings in excess of billings, along with the corresponding reserves, that were deemed fully uncollectible. Utilized Reserves at December 31, 2014 Charge Foreign Currency Translation Cash (1) Non-Cash Reserves at September 30, 2015 Severance and benefit related costs $ 466 $ 866 $ (7 ) $ 1,205 $ — $ 120 Lease termination expenses — 168 (2 ) 166 — — Reserves for customer receivables 11,464 1,630 (321 ) — 3,863 8,910 Other restructuring costs 2,496 8,066 (67 ) 4,045 4,832 1,618 Total pre-tax restructuring charges $ 14,426 $ 10,730 $ (397 ) $ 5,416 $ 8,695 $ 10,648 __________________________ (1) Refers to cash utilized to settle charges, either those reserved at December 31, 2014 or charged to income during the first nine months of 2015.

Share Information

Share Information	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Share Information	SHARE INFORMATION Earnings per share have been calculated using the following share information: Quarters Ended Nine Months Ended 2016 2015 2016 2015 Weighted average number of common shares used for basic EPS 34,462,579 36,245,193 34,977,469 36,670,565 Effect of dilutive stock options and restricted and deferred stock unit awards 518,411 336,636 462,562 290,021 Weighted average number of common shares and dilutive potential common stock used in dilutive EPS 34,980,990 36,581,829 35,440,031 36,960,586 The Company excluded 162,178 and 270,190 stock options for the quarters ended September 30, 2016 and 2015 , respectively, and 160,191 and 280,552 stock options for the nine months ended September 30, 2016 and 2015 , respectively, from the diluted earnings per share calculations for the Company’s common stock because they were anti-dilutive as their exercise prices were greater than the average market price of common shares for each period.

Assets Held For Sale

Assets Held For Sale	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Assets Held For Sale	ASSETS HELD FOR SALE On December 31, 2015, the Company entered into a definitive agreement to sell its 51% interest in BPPC, a pipe coatings company in Western Canada, to its joint venture partner, Perma-Pipe, Inc. The transaction closed effective February 1, 2016. BPPC was classified as held-for-sale at December 31, 2015. See Note 1 for further discussion of this sale. The following table provides the components of assets and liabilities held for sale (in thousands): December 31, 2015 Assets held for sale: Total current assets $ 8,559 Property, plant & equipment, less accumulated depreciation 12,501 Total assets held for sale $ 21,060 Liabilities held for sale: Total current liabilities $ 944 Debt 1,924 Deferred income tax liabilities 1,473 Other liabilities 2,620 Total liabilities held for sale $ 6,961 Non-controlling interests $ 7,142

Goodwill and Identified Intangi

Goodwill and Identified Intangible Assets	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Identified Intangible Assets	GOODWILL AND IDENTIFIED INTANGIBLE ASSETS Goodwill The following table presents a reconciliation of the beginning and ending balances of the Company’s goodwill at January 1, 2016 and September 30, 2016 (in thousands): Infrastructure Corrosion Energy Total Balance, January 1, 2016 Goodwill, gross $ 190,525 $ 73,345 $ 80,246 $ 344,116 Accumulated impairment losses (16,069 ) (45,400 ) (33,527 ) (94,996 ) Goodwill, net 174,456 27,945 46,719 249,120 Acquisitions (1) 50,553 — — 50,553 Foreign currency translation 324 682 — 1,006 Balance, September 30, 2016 Goodwill, gross 241,402 74,027 80,246 395,675 Accumulated impairment losses (16,069 ) (45,400 ) (33,527 ) (94,996 ) Goodwill, net $ 225,333 $ 28,627 $ 46,719 $ 300,679 __________________________ (1) During the first nine months of 2016, the Company recorded goodwill of $44.0 million , $2.4 million , $0.8 million and $3.4 million related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ and Concrete Solutions, respectively (see Note 1). Identified Intangible Assets Identified intangible assets consisted of the following (in thousands): (in thousands) September 30, 2016 December 31, 2015 Weighted Average Useful Lives (Years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount License agreements (1) 9.5 $ 4,456 $ (3,400 ) $ 1,056 $ 3,893 $ (3,275 ) $ 618 Leases 11.1 2,064 (875 ) 1,189 2,065 (764 ) 1,301 Trademarks (2) 14.1 24,177 (7,454 ) 16,723 22,519 (6,262 ) 16,257 Non-competes (3) 2.1 1,313 (1,026 ) 287 1,210 (945 ) 265 Customer relationships (4) 11.9 187,860 (50,805 ) 137,055 164,779 (41,967 ) 122,812 Patents and acquired technology (5) 9.9 66,539 (23,497 ) 43,042 55,260 (22,395 ) 32,865 $ 286,409 $ (87,057 ) $ 199,352 $ 249,726 $ (75,608 ) $ 174,118 __________________________ (1) During the first nine months of 2016, the Company recorded license agreements of $0.6 million related to the acquisition of LMJ’s CIPP business (see Note 1). (2) During the first nine months of 2016, the Company recorded trademarks of $1.4 million , $0.1 million and $0.1 million related to the acquisitions of Underground Solutions, Fyfe Europe and Concrete Solutions, respectively (see Note 1). (3) During the first nine months of 2016, the Company recorded non-compete agreements of $0.1 million related to the acquisition of Fyfe Europe (see Note 1). (4) During the first nine months of 2016, the Company recorded customer relationships of $20.7 million , $0.3 million , $0.2 million and $1.6 million related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ’s CIPP business and Concrete Solutions, respectively (see Note 1). (5) During the first nine months of 2016, the Company recorded acquired technology of $11.3 million related to the acquisition of Underground Solutions (see Note 1). Amortization expense was $4.2 million and $3.5 million for the quarters ended September 30, 2016 and 2015 , respectively. and $12.2 million and $9.9 million for the nine months ended September 30, 2016 and 2015 , respectively. Estimated amortization expense by year is as follows (in thousands): 2016 $ 16,393 2017 17,182 2018 17,088 2019 16,846 2020 16,811

Long-Term Debt and Credit Facil

Long-Term Debt and Credit Facility	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Long-Term Debt and Credit Facility	LONG-TERM DEBT AND CREDIT FACILITY Financing Arrangements Long-term debt, term note and notes payable consisted of the following (in thousands): September 30, December 31, Term note, due October 30, 2020, annualized rates of 2.85% and 2.47%, respectively $ 332,500 $ 345,625 Line of credit, 2.77% 36,000 — Other notes with interest rates from 3.3% to 6.5% 9,914 9,797 Subtotal 378,414 355,422 Less – Current maturities and notes payable 17,644 17,648 Less – Unamortized loan costs 3,628 4,294 Total $ 357,142 $ 333,480 In October 2015, the Company entered into an amended and restated $650.0 million senior secured credit facility (the “Credit Facility”) with a syndicate of banks. Bank of America, N.A. served as the sole administrative agent and JP Morgan Chase Bank, N.A. and U.S. Bank National Association acted as co-syndication agents. Merrill Lynch Pierce Fenner & Smith Incorporated, JPMorgan Securities LLC and U.S. Bank National Association acted as joint lead arrangers and joint book managers in the syndication of the Credit Facility. The Credit Facility consists of a $300.0 million five -year revolving line of credit and a $350.0 million five -year term loan facility. The Company drew the entire term loan from the Credit Facility to (i) retire $344.7 million in indebtedness outstanding under the Company’s prior credit facility; (ii) fund expenses associated with the Credit Facility; and (iii) for general corporate purposes. Generally, interest is charged on the principal amounts outstanding under the Credit Facility at the British Bankers Association LIBOR rate plus an applicable rate ranging from 1.25% to 2.25% depending on the Company’s consolidated leverage ratio. The Company can also opt for an interest rate equal to a base rate (as defined in the credit documents) plus an applicable rate, which also is based on the Company’s consolidated leverage ratio. The applicable LIBOR borrowing rate (LIBOR plus Company’s applicable rate) as of September 30, 2016 was approximately 2.85% . The Company’s indebtedness at September 30, 2016 consisted of $332.5 million outstanding from the $350.0 million term loan under the Credit Facility and $36.0 million on the line of credit under the Credit Facility. During 2016, the Company (i) borrowed $30.0 million on the line of credit to help fund the acquisition of Underground Solutions; (ii) borrowed $3.0 million on the line of credit to help fund a small acquisition; and (iii) had net borrowings of $3.0 million on the line of credit for both domestic and international working capital needs. Additionally, the Company designated $9.6 million of debt held by its joint venture partners (representing funds loaned by its joint venture partners) as third-party debt in the consolidated financial statements and held $0.3 million of third-party notes and bank debt at September 30, 2016 . Beginning in 2016, FASB ASC 835-30, Interest–Imputation of Interest (“FASB ASC 835-30”) requires a change in the balance sheet presentation of debt issuance costs to be a deduction from the carrying amount of the related debt liability instead of a deferred charge as previously reported. As such, the Company has presented unamortized loan costs of $3.6 million and $4.3 million at September 30, 2016 and December 31, 2015, respectively, as a reduction to long-term debt on the Company’s Consolidated Balance Sheets. Comparable periods have been retrospectively adjusted in accordance with FASB ASC 835-30. As of September 30, 2016 , the Company had $36.3 million in letters of credit issued and outstanding under the Credit Facility. Of such amount, $19.4 million was collateral for the benefit of certain of our insurance carriers and $16.8 million was for letters of credit or bank guarantees of performance or payment obligations of foreign subsidiaries. The Company’s indebtedness at December 31, 2015 consisted of $345.6 million outstanding from the term loan under the Credit Facility and zero on the line of credit under the Credit Facility. Additionally, the Company designated $9.6 million of debt held by its joint ventures (representing funds loaned by its joint venture partners) as third-party debt in the consolidated financial statements and held $0.1 million of third-party notes and bank debt at December 31, 2015 . Further, the Company had $1.9 million in debt listed as held for sale at December 31, 2015 related to the sale of BPPC (see Note 5). At September 30, 2016 and December 31, 2015, the estimated fair value of the Company’s long-term debt was approximately $373.4 million and $349.1 million , respectively. Fair value was estimated using market rates for debt of similar risk and maturity and a discounted cash flow model, which are based on Level 3 inputs as defined in Note 12. In October 2015, the Company entered into an interest rate swap agreement for a notional amount of $262.5 million , which is set to expire in October 2020. The notional amount of this swap mirrors the amortization of a $262.5 million portion of the Company’s $350.0 million term loan drawn from the Credit Facility. The swap requires the Company to make a monthly fixed rate payment of 1.46% calculated on the amortizing $262.5 million notional amount, and provides for the Company to receive a payment based upon a variable monthly LIBOR interest rate calculated on the amortizing $262.5 million notional amount. The receipt of the monthly LIBOR-based payment offsets a variable monthly LIBOR-based interest cost on a corresponding $262.5 million portion of the Company’s term loan from the Credit Facility. This interest rate swap is used to partially hedge the interest rate risk associated with the volatility of monthly LIBOR rate movement, and is accounted for as a cash flow hedge. See Note 12. The Credit Facility is subject to certain financial covenants, including a consolidated financial leverage ratio and consolidated fixed charge coverage ratio. Subject to the specifically defined terms and methods of calculation as set forth in the Credit Facility’s credit agreement, the financial covenant requirements, as of each quarterly reporting period end, are defined as follows: • Consolidated financial leverage ratio compares consolidated funded indebtedness to Credit Facility defined income. The initial maximum amount was not to initially exceed 3.75 to 1.00. In connection with the acquisition of Underground Solutions, the Company executed a one-time election, in accordance with the Credit Agreement, to increase the consolidated financial leverage ratio to 4.00 to 1.00 for a period of one year. After which, the ratio will decrease periodically at scheduled reporting periods to not more than 3.75 to 1.00 beginning with the quarter ending March 31, 2017. At September 30, 2016 , the Company’s consolidated financial leverage ratio was 3.65 to 1.00 and, using the Credit Facility defined income, the Company had the capacity to borrow up to $37.4 million of additional debt. • Consolidated fixed charge coverage ratio compares Credit Facility defined income to Credit Facility defined fixed charges with a minimum permitted ratio of not less than 1.25 to 1.00. At September 30, 2016 , the Company’s fixed charge ratio was 1.49 to 1.00. At September 30, 2016 , the Company was in compliance with all of its debt and financial covenants as required under the Credit Facility.

Stockholders' Equity and Equity

Stockholders' Equity and Equity Compensation	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Stockholders' Equity and Equity Compensation	STOCKHOLDERS’ EQUITY AND EQUITY COMPENSATION Share Repurchase Plan Effective November 2015, and in connection with the terms of the amended Credit Facility, the Company’s Board of Directors authorized the open market repurchase of up to $20.0 million of the Company’s common stock to be made during 2015 and 2016 (the “November 2015 Program”). In March 2016, the Company’s Board of Directors authorized the open market repurchase of up to an additional $20.0 million of the Company’s common stock during 2016 (the “March 2016 Program”) following the expiration or completion of the November 2015 Program. The Company began repurchasing shares under the March 2016 Program in April 2016 immediately following completion of the November 2015 Program. In August 2016, the Company’s Board of Directors authorized the open market repurchase of up to an additional $10.0 million of the Company’s common stock during 2016 (the “August 2016 Program”) following the expiration or completion of the March 2016 Program. The Company began repurchasing shares under the August 2016 Program in October 2016 immediately following completion of the March 2016 Program. In addition to the above, the Company has authorization under the Credit Facility to repurchase up to an additional $10.0 million of the Company’s common stock during 2016 in open market repurchases. Once repurchased, the Company promptly retires such shares. The Company is also authorized to utilize up to $10.0 million in cash to purchase shares of the Company’s common stock in each calendar year in connection with the Company’s equity compensation programs for employees. The participants in the Company’s equity plans may surrender shares of common stock in satisfaction of tax obligations arising from the vesting of restricted stock and restricted stock unit awards under such plans and in connection with the exercise of stock option awards. The deemed price paid is the closing price of the Company’s common stock on the Nasdaq Global Select Market on the date that the restricted stock and restricted stock unit vests or the shares of the Company’s common stock are surrendered in exchange for stock option exercises. The option holder may elect a “net, net” exercise in connection with the exercise of employee stock options such that the option holder receives a number of shares equal to (i) the built-in gain in the option shares divided by the market price of the Company’s common stock on the date of exercise, less (ii) a number of shares equal to the taxes due upon the exercise of the option divided by the market price of the Company’s common stock on the date of exercise. The shares of Company common stock surrendered to the Company for taxes due on the exercise of the option are deemed repurchased by the Company. During the nine months ended September 30, 2016 , the Company acquired 1,908,380 shares of the Company’s common stock for $35.4 million ( $18.57 average price per share) through the open market repurchase programs discussed above and 58,967 shares of the Company’s common stock for $1.2 million ( $19.67 average price per share) in connection with the vesting of restricted stock and restricted stock units and the exercise of stock options. Once repurchased, the Company promptly retired all such shares. Equity-Based Compensation Plans In April 2016, the Company’s stockholders approved the 2016 Employee Equity Incentive Plan (the “2016 Employee Plan”), which replaced the 2013 Employee Equity Incentive Plan. The 2016 Employee Plan provides for equity-based compensation awards, including restricted shares of common stock, performance awards, stock options, stock units and stock appreciation rights. The 2016 Employee Plan is administered by the Compensation Committee of the Board of Directors, which determines eligibility, timing, pricing, amount and other terms or conditions of awards. There are 1,132,739 shares of the Company’s common stock registered for issuance under the 2016 Employee Plan and, at September 30, 2016 , 1,126,702 shares of common stock were available for issuance. In April 2016, the Company’s stockholders also approved the 2016 Director Equity Incentive Plan (the “2016 Director Plan”), which replaced the 2011 Non-Employee Director Equity Incentive Plan. The 2016 Director Plan provides for equity-based compensation awards, including non-qualified stock options and stock units. The Board of Directors administers the 2016 Director Plan and has the authority to establish, amend and rescind any rules and regulations related to the 2016 Director Plan. There are 166,456 shares of the Company’s common stock registered for issuance under the 2016 Director Plan and, at September 30, 2016 , 165,414 shares of common stock were available for issuance. Stock Awards Stock awards, which include shares of restricted stock, restricted stock units and restricted performance units, are awarded from time to time to executive officers and certain key employees of the Company. Stock award compensation is recorded based on the award date fair value and charged to expense ratably through the requisite service period. The forfeiture of unvested restricted stock, restricted stock units and restricted performance units causes the reversal of all previous expense to be recorded as a reduction of current period expense. A summary of the stock award activity is as follows: Nine Months Ended Stock Awards Weighted Average Award Date Fair Value Outstanding at January 1, 2016 1,275,707 $ 19.60 Restricted shares awarded — — Restricted stock units awarded 318,205 18.42 Performance stock units awarded 244,937 18.35 Restricted shares distributed (159,406 ) 23.48 Restricted stock units distributed (14,034 ) 21.50 Performance stock units distributed — — Restricted shares forfeited (18,499 ) 23.16 Restricted stock units forfeited (64,871 ) 17.56 Performance stock units forfeited (55,936 ) 18.58 Outstanding at September 30, 2016 1,526,103 $ 18.81 Expense associated with stock awards was $2.1 million and $2.2 million for the quarters ended September 30, 2016 and 2015 , respectively, and $6.7 million and $5.8 million for the nine months ended September 30, 2016 and 2015 , respectively. Unrecognized pre-tax expense of $15.1 million related to stock awards is expected to be recognized over the weighted average remaining service period of 1.89 years for awards outstanding at September 30, 2016 . Deferred Stock Unit Awards Deferred stock units are generally awarded to directors of the Company and represent the Company’s obligation to transfer one share of the Company’s common stock to the grantee at a future date and are generally fully vested on the date of grant. The expense related to the issuance of deferred stock units is recorded as of the date of the award. A summary of deferred stock unit activity is as follows: Nine Months Ended Deferred Stock Units Weighted Average Award Date Fair Value Outstanding at January 1, 2016 247,219 $ 19.92 Awarded 44,824 21.22 Distributed (39,660 ) 21.29 Outstanding at September 30, 2016 252,383 $ 19.93 Expense associated with awards of deferred stock units was immaterial for the quarters ended September 30, 2016 and 2015, respectively, and $1.0 million and $1.0 million for the nine months ended September 30, 2016 and 2015 , respectively. Stock Options Stock options on the Company’s common stock are awarded from time to time to executive officers and certain key employees of the Company. Stock options granted generally have a term of seven to ten years and an exercise price equal to the market value of the underlying common stock on the date of grant. A summary of stock option activity is as follows: Nine Months Ended Shares Weighted Average Exercise Price Outstanding at January 1, 2016 288,383 $ 21.73 Granted — — Exercised (18,193 ) 16.80 Canceled/Expired (1,836 ) 25.58 Outstanding at September 30, 2016 268,354 $ 22.04 Exercisable at September 30, 2016 268,354 $ 22.04 Expense associated with stock option grants was zero and $0.1 million for the nine months ended September 30, 2016 and 2015 , respectively. There was no unrecognized pre-tax expense related to stock option grants at September 30, 2016 . Financial data for stock option exercises are summarized as follows (in thousands): Nine Months Ended 2016 2015 Amount collected from stock option exercises $ 306 $ 1,465 Total intrinsic value of stock option exercises 47 282 Tax shortfall of stock option exercises recorded in additional paid-in-capital 315 109 Aggregate intrinsic value of outstanding stock options 102 379 Aggregate intrinsic value of exercisable stock options 102 379 The intrinsic value calculations are based on the Company’s closing stock price of $19.07 and $16.48 on September 30, 2016 and 2015 , respectively. The Company uses a binomial option-pricing model for valuation purposes to reflect the features of stock options granted. Volatility, expected term and dividend yield assumptions are based on the Company’s historical experience. The risk-free rate is based on a U.S. treasury note with a maturity similar to the option grant’s expected term. There were no stock options awarded during 2016 or 2015 .

Taxes on Income

Taxes on Income	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Taxes on Income	TAXES ON INCOME The Company’s effective tax rate in the quarter and nine-month period ended September 30, 2016 was 30.7% and 11.4% , respectively. These effective rates were favorably impacted by a higher mix of earnings towards foreign jurisdictions, which generally have lower statutory tax rates, and the impact of certain discrete tax items relating to the 2016 Restructuring. The effective tax rate for the first nine months of 2016 was also favorably impacted by a $1.9 million benefit, or 15.3% benefit to the effective tax rate, related to the reversal of a previously recorded valuation allowance due to changes in the realization of future tax benefits. For the quarter and nine-month period ended September 30, 2015 , the Company’s effective tax rate was 29.1% and 31.4% , respectively. The high effective tax rate on pre-tax income was unfavorably impacted by a relatively small income tax benefit recorded on pre-tax charges related to the 2014 Restructuring and the impact of discrete tax items that were related to non-deductible restructuring charges. In addition, the rate was negatively influenced by recording no tax benefit on losses in jurisdictions where valuation allowances were recorded against deferred tax assets.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Litigation The Company is involved in certain litigation incidental to the conduct of its business and affairs. Management, after consultation with legal counsel, does not believe that the outcome of any such litigation, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows. Contingencies In February 2016, the Company entered into a conditional agreement to settle an outstanding project dispute with a client in Infrastructure Solutions. As a result of the conditional settlement, the Company recorded a $2.7 million accrual as of December 31, 2015 in accordance with FASB ASC Subtopic No. 450-20, Contingencies - Loss Contingencies (“FASB ASC 450-20”). In March 2016, the Company entered into the final agreement and wrote off a $7.5 million customer receivable, along with the related allowance for doubtful account, as of March 31, 2016. The settlement amount was paid in April 2016. In connection with the Brinderson acquisition, certain pre-acquisition matters were identified in 2014 whereby a loss is both probable and reasonably estimable. The Company establishes liabilities in accordance with FASB ASC 450-20, and accordingly, recorded an accrual related to various legal, tax, employee benefit and employment matters. At December 31, 2015, the accrual related to these matters was $10.5 million . During the second quarter of 2016, the Company made payments totaling $0.4 million related to one of the above matters. Also during the second quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $1.8 million . During the third quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal and tax counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $2.3 million . The accrual adjustments resulted in an offset to “Operating expense” in the Consolidated Statement of Operations. As of September 30, 2016 , the remaining accrual relating to these matters was $6.0 million and represented the Company’s reasonable estimate of probable loss related to the Brinderson pre-acquisition matters. The Company believes it has asserted meritorious defenses to these remaining matters. Purchase Commitments The Company had no material purchase commitments at September 30, 2016 . Guarantees The Company has many contracts that require the Company to indemnify the other party against loss from claims, including claims of patent or trademark infringement or other third party claims for injuries, damages or losses. The Company has agreed to indemnify its surety against losses from third-party claims of subcontractors. The Company has not previously experienced material losses under these provisions and, while there can be no assurances, currently does not anticipate any future material adverse impact on its consolidated financial position, results of operations or cash flows. The Company regularly reviews its exposure under all its engagements, including performance guarantees by contractual joint ventures and indemnification of its surety. As a result of the most recent review, the Company has determined that the risk of material loss is remote under these arrangements and has not recorded a liability for these risks at September 30, 2016 on its consolidated balance sheet.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	SEGMENT REPORTING The Company has three operating segments, which are also its reportable segments: Infrastructure Solutions; Corrosion Protection; and Energy Services. The Company’s operating segments correspond to its management organizational structure. Each operating segment has a president who reports to the Company’s chief executive officer, who is also the chief operating decision manager (“CODM”). The operating results and financial information reported by each of the segments are evaluated separately, regularly reviewed and used by the CODM to evaluate segment performance, allocate resources and determine management incentive compensation. The following disaggregated financial results have been prepared using a management approach that is consistent with the basis and manner with which management internally disaggregates financial information for the purpose of making internal operating decisions. The Company evaluates performance based on stand-alone operating income (loss), which includes acquisition-related expenses, restructuring charges and an allocation of corporate-related expenses. Financial information by segment was as follows (in thousands): Quarters Ended Nine Months Ended 2016 (1) 2015 (2) 2016 (3) 2015 (4) Revenues: Infrastructure Solutions $ 158,562 $ 149,606 $ 434,523 $ 421,170 Corrosion Protection 95,084 121,392 281,939 329,157 Energy Services 54,878 85,597 183,656 252,530 Total revenues $ 308,524 $ 356,595 $ 900,118 $ 1,002,857 Gross profit: Infrastructure Solutions $ 40,566 $ 38,428 $ 109,485 $ 106,074 Corrosion Protection 18,374 27,595 52,676 70,311 Energy Services 7,378 11,098 19,761 31,979 Total gross profit $ 66,318 $ 77,121 $ 181,922 $ 208,364 Operating income (loss): Infrastructure Solutions (5) $ 18,573 $ 16,255 $ 37,448 $ 35,701 Corrosion Protection (6) 513 6,886 (7,626 ) 8,323 Energy Services (7) 1,419 1,797 (5,311 ) 4,562 Total operating income 20,505 24,938 24,511 48,586 Other income (expense): Interest expense (3,825 ) (3,144 ) (11,081 ) (9,365 ) Interest income 37 25 197 229 Other 288 (359 ) (1,183 ) (2,360 ) Total other expense (3,500 ) (3,478 ) (12,067 ) (11,496 ) Income before taxes on income $ 17,005 $ 21,460 $ 12,444 $ 37,090 _______________________ (1) Results include: (i) $1.3 million of 2016 Restructuring charges (see Note 3); (ii) $0.4 million of 2014 Restructuring expense reversals (see Note 3); and (iii) $0.3 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets. (2) Results include (i) $1.5 million of 2014 Restructuring charges (see Note 3); and (ii) $(0.5) million of costs incurred related to the acquisition of Schultz and other acquisition targets. (3) Results include: (i) $14.8 million of 2016 Restructuring charges (see Note 3); (ii) $0.5 million of 2014 Restructuring expense reversals (see Note 3); (iii) $2.1 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets; and (iv) inventory step up expense of $3.6 million recognized as part of the accounting for business combinations. (4) Results include: (i) $10.7 million of 2014 Restructuring charges (see Note 3); and (ii) $0.8 million of costs incurred related to the acquisition of Schultz and other acquisition targets. (5) Operating income for the quarter ended September 30, 2016 includes: (i) less than $0.1 million of 2016 Restructuring charges (see Note 3); (ii) $0.4 million of 2014 Restructuring expense reversals (see Note 3); and (iii) $0.3 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets. Operating income for the quarter ended September 30, 2015 includes $1.4 million of 2014 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2016 includes: (i) $3.1 million of 2016 Restructuring charges (see Note 3); (ii) $0.5 million of 2014 Restructuring expense reversals (see Note 3); (iii) $2.1 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets; and (iv) inventory step up expense of $3.6 million recognized as part of the accounting for business combinations. Operating income for the nine months ended September 30, 2015 includes $7.9 million of 2014 Restructuring charges (see Note 3). (6) Operating income for the quarter ended September 30, 2016 includes $0.2 million of 2016 Restructuring charges (see Note 3). Operating income for the quarter ended September 30, 2015 includes $0.5 million of acquisition related expenses. Operating loss for the nine months ended September 30, 2016 includes $3.9 million of 2016 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2015 includes $0.5 million of acquisition related expenses. (7) Operating income for the quarter ended September 30, 2016 includes $1.1 million of 2016 Restructuring charges (see Note 3). Operating loss for the nine months ended September 30, 2016 includes $7.6 million of 2016 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2015 includes $0.3 million of costs incurred related to the acquisition of Schultz. The following table summarizes revenues, gross profit and operating income by geographic region (in thousands): Quarters Ended Nine Months Ended 2016 2015 2016 2015 Revenues (1) : United States $ 232,734 $ 267,001 $ 684,088 $ 742,976 Canada 39,161 45,340 94,113 131,391 Europe 13,850 14,905 43,771 42,668 Other foreign 22,779 29,349 78,146 85,822 Total revenues $ 308,524 $ 356,595 $ 900,118 $ 1,002,857 Gross profit: United States $ 51,217 $ 56,243 $ 138,869 $ 148,736 Canada 8,373 9,998 19,644 30,677 Europe 2,794 4,025 8,893 12,085 Other foreign 3,934 6,855 14,516 16,866 Total gross profit $ 66,318 $ 77,121 $ 181,922 $ 208,364 Operating income (loss): United States $ 15,402 $ 11,464 $ 15,547 $ 19,188 Canada 5,410 6,258 10,208 19,700 Europe 352 570 1,108 2,511 Other foreign (659 ) 6,646 (2,352 ) 7,187 Total operating income $ 20,505 $ 24,938 $ 24,511 $ 48,586 __________________________ (1) Revenues are attributed to the country of origin for the Company’s legal entities. For a significant majority of its legal entities, the country of origin relates to the country or geographic area that it services.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	DERIVATIVE FINANCIAL INSTRUMENTS As a matter of policy, the Company uses derivatives for risk management purposes, and does not use derivatives for speculative purposes. From time to time, the Company may enter into foreign currency forward contracts to hedge foreign currency cash flow transactions. For cash flow hedges, a gain or loss is recorded in the Consolidated Statements of Operations upon settlement of the hedge. All of the Company’s hedges that are designated as hedges for accounting purposes were highly effective; therefore, no notable amounts of hedge ineffectiveness were recorded in the Company’s Consolidated Statements of Operations for the outstanding hedged balance. During each of the quarters ended September 30, 2016 and 2015 , the Company recorded less than $0.1 million as a gain on the consolidated statements of operations in the other income (expense) line item upon settlement of cash flow hedges. At September 30, 2016 , the Company’s cash flow hedges were in a net deferred loss position of $5.5 million due to unfavorable movements in short-term interest rates relative to the hedged position. The loss was recorded in accrued expenses and other comprehensive income on the Consolidated Balance Sheets and on the foreign currency translation adjustment and derivative transactions line of the Consolidated Statements of Equity. The Company presents derivative instruments in the consolidated financial statements on a gross basis. The gross and net difference of derivative instruments are considered to be immaterial to the financial position presented in the financial statements. The Company engages in regular inter-company trade activities and receives royalty payments from its wholly-owned Canadian entities, paid in Canadian dollars, rather than the Company’s functional currency, U.S. dollars. The Company utilizes foreign currency forward exchange contracts to mitigate the currency risk associated with the anticipated future payments from its Canadian entities. In October 2015, the Company entered into an interest rate swap agreement for a notional amount of $262.5 million , which is set to expire in October 2020. The notional amount of this swap mirrored the amortization of a $262.5 million portion of the Company’s $350.0 million term loan drawn from the Credit Facility. The swap requires the Company to make a monthly fixed rate payment of 1.46% calculated on the amortizing $262.5 million notional amount and provides for the Company to receive a payment based upon a variable monthly LIBOR interest rate calculated by amortizing the $262.5 million same notional amount. The receipt of the monthly LIBOR-based payment offset a variable monthly LIBOR-based interest cost on a corresponding $262.5 million portion of the Company’s term loan from the Credit Facility. This interest rate swap is used to partially hedge the interest rate risk associated with the volatility of monthly LIBOR rate movement and is accounted for as a cash flow hedge. The following table provides a summary of the fair value amounts of our derivative instruments, all of which are Level 2 inputs as defined below (in thousands): Designation of Derivatives Balance Sheet Location September 30, December 31, Derivatives Designated as Hedging Instruments: Forward Currency Contracts Prepaid expenses and other current assets $ — $ 18 Total Assets $ — $ 18 Forward Currency Contracts Accrued expenses $ 643 $ 243 Interest Rate Swaps Accrued expenses 4,859 13 Total Liabilities $ 5,502 $ 256 Derivatives Not Designated as Hedging Instruments: Forward Currency Contracts Prepaid expenses and other current assets $ — $ 91 Total Assets $ — $ 91 Forward Currency Contracts Accrued expenses $ 249 $ — Total Liabilities $ 249 $ — Total Derivative Assets $ — $ 109 Total Derivative Liabilities 5,751 256 Total Net Derivative Liability $ (5,751 ) $ (147 ) FASB ASC 820, Fair Value Measurements (“FASB ASC 820”), defines fair value, establishes a framework for measuring fair value and expands disclosure requirements about fair value measurements for interim and annual reporting periods. The guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1 – defined as quoted prices in active markets for identical instruments; Level 2 – defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3 – defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. In accordance with FASB ASC 820, the Company determined that the instruments summarized below are derived from significant observable inputs, referred to as Level 2 inputs. The following tables represent assets and liabilities measured at fair value on a recurring basis and the basis for that measurement at September 30, 2016 and December 31, 2015 (in thousands): Total Fair Value at Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Forward Currency Contracts $ — $ — $ — $ — Total $ — $ — $ — $ — Liabilities: Forward Currency Contracts $ 892 $ — $ 892 $ — Interest Rate Swap 4,859 — 4,859 — Total $ 5,751 $ — $ 5,751 $ — Total Fair Value at Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Forward Currency Contracts $ 109 $ — $ 109 $ — Total $ 109 $ — $ 109 $ — Liabilities: Forward Currency Contracts $ 243 $ — $ 243 $ — Interest Rate Swap 13 — 13 — Total $ 256 $ — $ 256 $ — The following table summarizes the Company’s derivative positions at September 30, 2016 : Position Notional Amount Weighted Average Remaining Maturity In Years Average Exchange Rate USD/EURO Sell € 3,641,000 0.3 1.13 USD/British Pound Sell £ 4,595,000 0.3 1.30 EURO/British Pound Sell £ 8,000,000 0.3 .87 Interest Rate Swap $ 249,375,000 4.1 The Company had no transfers between Level 1, 2 or 3 inputs during the quarter ended September 30, 2016 . Certain financial instruments are required to be recorded at fair value. Changes in assumptions or estimation methods could affect the fair value estimates; however, the Company does not believe any such changes would have a material impact on its financial condition, results of operations or cash flows. Other financial instruments including cash and cash equivalents and short-term borrowings, including notes payable, are recorded at cost, which approximates fair value, which are based on Level 2 inputs as previously defined.

Accounting Policies (Policies)

Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Revenues	Revenues Revenues include construction, engineering and installation revenues that are recognized using the percentage-of-completion method of accounting in the ratio of costs incurred to estimated final costs. Revenues from change orders, extra work and variations in the scope of work are recognized when it is probable that they will result in additional contract revenue and when the amount can be reliably estimated. Contract costs include all direct material and labor costs and those indirect costs related to contract performance, such as indirect labor, supplies, tools and equipment costs. The Company expenses all pre-contract costs in the period these costs are incurred. Since the financial reporting of these contracts depends on estimates, which are assessed continually during the term of these contracts, recognized revenues and profit are subject to revisions as the contract progresses to completion. Revisions in profit estimates are reflected in the period in which the facts that give rise to the revision become known. If material, the effects of any changes in estimates are disclosed in the notes to the consolidated financial statements. When estimates indicate that a loss will be incurred on a contract, a provision for the expected loss is recorded in the period in which the loss becomes evident. Any revenue recognized is only to the extent costs have been recognized in the period. Additionally, the Company expenses all costs for unpriced change orders in the period in which they are incurred. Revenues from the Company’s Energy Services segment are derived mainly from multiple engineering and construction type contracts, as well as maintenance contracts, under multi-year long-term master service agreements and alliance contracts. Businesses within the Company’s Energy Services segment enter into customer contracts that contain three principal types of pricing provisions: time and materials, cost plus fixed fee and fixed price. Although the terms of these contracts vary, most are made pursuant to cost reimbursable contracts on a time and materials basis under which revenues are recorded based on costs incurred at agreed upon contractual rates. These businesses also perform services on a cost plus fixed fee basis under which revenues are recorded based upon costs incurred at agreed upon rates and a proportionate amount of the fixed fee or percentage stipulated in the contract.
Foreign Currency Translation	Foreign Currency Translation Net foreign exchange transaction gains (losses) of $0.3 million and $0.1 million for the quarters ended September 30, 2016 and 2015 , respectively, and $(1.4) million and $(0.3) million for the nine months ended September 30, 2016 and 2015 , respectively, are included in other income (expense) in the Consolidated Statements of Operations. For the Company’s international subsidiaries, the local currency is generally the functional currency. Assets and liabilities of these subsidiaries are translated into U.S. dollars using rates in effect at the balance sheet date while revenues and expenses are translated into U.S. dollars using average exchange rates. The cumulative translation adjustment resulting from changes in exchange rates are included in the Consolidated Balance Sheets as a component of accumulated other comprehensive income (loss) in total stockholders’ equity. The Company’s accumulated other comprehensive income is comprised of three main components: (i) currency translation; (ii) derivatives; and (iii) gains and losses associated with the Company’s defined benefit plan in the United Kingdom.
Taxation	Taxation The Company provides for estimated income taxes payable or refundable on current year income tax returns as well as the estimated future tax effects attributable to temporary differences and carryforwards, based upon enacted tax laws and tax rates, and in accordance with FASB ASC 740, Income Taxes (“FASB ASC 740”). FASB ASC 740 also requires that a valuation allowance be recorded against any deferred tax assets that are not likely to be realized in the future. Refer to Note 9 for additional information regarding taxes on income.
Purchase Price Accounting	Purchase Price Accounting The Company accounts for its acquisitions in accordance with FASB ASC 805, Business Combinations . The base cash purchase price plus the estimated fair value of any non-cash or contingent consideration given for an acquired business is allocated to the assets acquired (including identified intangible assets) and liabilities assumed based on the estimated fair values of such assets and liabilities. The excess of the total consideration over the aggregate net fair values assigned is recorded as goodwill. Contingent consideration, if any, is recognized as a liability as of the acquisition date with subsequent adjustments recorded in the consolidated statements of operations. Indirect and general expenses related to business combinations are expensed as incurred. The Company typically determines the fair value of tangible and intangible assets acquired in a business combination using independent valuations that rely on management’s estimates of inputs and assumptions that a market participant would use. Key assumptions include cash flow projections, growth rates, asset lives, and discount rates based on an analysis of weighted average cost of capital.
Long-Lived Assets	Long-Lived Assets Property, plant and equipment and other identified intangibles (primarily customer relationships, patents and acquired technologies, trademarks, licenses and non-compete agreements) are recorded at cost, net of accumulated depreciation and impairment and, except for goodwill and certain trademarks, are depreciated or amortized on a straight-line basis over their estimated useful lives. Changes in circumstances such as technological advances, changes to the Company’s business model or changes in the Company’s capital strategy can result in the actual useful lives differing from the Company’s estimates. If the Company determines that the useful life of its property, plant and equipment or its identified intangible assets should be changed, the Company would depreciate or amortize the net book value in excess of the salvage value over its revised remaining useful life, thereby increasing or decreasing depreciation or amortization expense. Long-lived assets, including property, plant and equipment and other intangibles, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Such impairment tests are based on a comparison of undiscounted cash flows to the recorded value of the asset. The estimate of cash flow is based upon, among other things, assumptions about expected future operating performance. The Company’s estimates of undiscounted cash flow may differ from actual cash flow due to, among other things, technological changes, economic conditions, changes to its business model or changes in its operating performance. If the sum of the undiscounted cash flows (excluding interest) is less than the carrying value, the Company recognizes an impairment loss, measured as the amount by which the carrying value exceeds the fair value of the asset.
Goodwill	Goodwill Acquisitions treated as a business combination generally result in goodwill related to, among other things, synergies, acquired workforce, growth opportunities and market potential. Under FASB ASC 350, the Company assesses recoverability of goodwill on an annual basis or when events or changes in circumstances indicate that the carrying amount of goodwill may not be recoverable. An impairment charge will be recognized to the extent that the implied fair value of a reporting unit is less than its carrying value. Factors that could potentially trigger an impairment review include (but are not limited to): • significant underperformance of a reporting unit relative to expected, historical or forecasted operating results; • significant negative industry or economic trends; • significant changes in the strategy for a segment including extended slowdowns in the reporting unit’s market; • a decrease in market capitalization below the Company’s book value; and • a significant change in regulations. Whether during the annual impairment assessment or during a trigger-based impairment review, the Company determines the fair value of its reporting units and compares such fair value to the carrying value of those reporting units to determine if there are any indications of goodwill impairment. Fair value of reporting units is determined using a combination of two valuation methods: a market approach and an income approach with each method given equal weight in determining the fair value assigned to each reporting unit. Absent an indication of fair value from a potential buyer or similar specific transaction, the Company believes the use of these two methods provides a reasonable estimate of a reporting unit’s fair value. Assumptions common to both methods are operating plans and economic outlooks, which are used to forecast future revenues, earnings and after-tax cash flows for each reporting unit. These assumptions are applied consistently for both methods. The market approach estimates fair value by first determining earnings before interest, taxes, depreciation and amortization (“EBITDA”) multiples for comparable publicly-traded companies with similar characteristics of the reporting unit. The EBITDA multiples for comparable companies are based upon current enterprise value. The enterprise value is based upon current market capitalization and includes a control premium. The Company believes this approach is appropriate because it provides a fair value estimate using multiples from entities with operations and economic characteristics comparable to its reporting units. The income approach is based on forecasted future (debt-free) cash flows that are discounted to present value using factors that consider timing and risk of future cash flows. The Company believes this approach is appropriate because it provides a fair value estimate based upon the reporting unit’s expected long-term operating cash flow performance. Discounted cash flow projections are based on financial forecasts developed from operating plans and economic outlooks, growth rates, estimates of future expected changes in operating margins, terminal value growth rates, future capital expenditures and changes in working capital requirements. Estimates of discounted cash flows may differ from actual cash flows due to, among other things, changes in economic conditions, changes to business models, changes in the Company’s weighted average cost of capital, or changes in operating performance. The discount rate applied to the estimated future cash flows is one of the most significant assumptions utilized under the income approach. The Company determines the appropriate discount rate for each of its reporting units based on the weighted average cost of capital (“WACC”) for each individual reporting unit. The WACC takes into account both the pre-tax cost of debt and cost of equity (a major component of the cost of equity is the current risk-free rate on twenty year U.S. Treasury bonds). As each reporting unit has a different risk profile based on the nature of its operations, including market-based factors, the WACC for each reporting unit may differ. Accordingly, the WACCs are adjusted, as appropriate, to account for company-specific risks associated with each reporting unit.
Investments in Affiliated Companies	Investments in Affiliated Companies Investments in entities in which the Company does not have control or is not the primary beneficiary of a variable interest entity, and for which the Company has 20% to 50% ownership or has the ability to exert significant influence, have historically been accounted for by the equity method. At September 30, 2016 and December 31, 2015 , the Company did not own any investments in affiliated companies.
Investments in Variable Interest Entities	Investments in Variable Interest Entities The Company evaluates all transactions and relationships with variable interest entities (“VIE”) to determine whether the Company is the primary beneficiary of the entities in accordance with FASB ASC 810, Consolidation. The Company’s overall methodology for evaluating transactions and relationships under the VIE requirements includes the following two steps: • determine whether the entity meets the criteria to qualify as a VIE; and • determine whether the Company is the primary beneficiary of the VIE. In performing the first step, the significant factors and judgments that the Company considers in making the determination as to whether an entity is a VIE include: • the design of the entity, including the nature of its risks and the purpose for which the entity was created, to determine the variability that the entity was designed to create and distribute to its interest holders; • the nature of the Company’s involvement with the entity; • whether control of the entity may be achieved through arrangements that do not involve voting equity; • whether there is sufficient equity investment at risk to finance the activities of the entity; and • whether parties other than the equity holders have the obligation to absorb expected losses or the right to receive residual returns. If the Company identifies a VIE based on the above considerations, it then performs the second step and evaluates whether it is the primary beneficiary of the VIE by considering the following significant factors and judgments: • whether the entity has the power to direct the activities of a variable interest entity that most significantly impact the entity’s economic performance; and • whether the entity has the obligation to absorb losses of the entity that could potentially be significant to the variable interest entity or the right to receive benefits from the entity that could potentially be significant to the variable interest entity. Based on its evaluation of the above factors and judgments, as of September 30, 2016 , the Company consolidated any VIEs in which it was the primary beneficiary.
Newly Issued Accounting Pronouncements	Newly Issued Accounting Pronouncements In August 2016, the FASB issued guidance to address diversity in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The standard is effective retroactively in fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its statement of cash flows. In March 2016, the FASB issued guidance that simplifies several aspects of the accounting for share-based payment awards to employees, including the accounting for income taxes, classification of awards as either equity or liabilities and classification in the statement of cash flows. The standard is effective for public companies for annual periods beginning after December 15, 2016, including interim periods within those fiscal years. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements. In February 2016, the FASB issued guidance that requires lessees to present right-of-use assets and lease liabilities on the balance sheet. The standard is effective for public companies for annual periods beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations. In November 2015, the FASB issued guidance that requires all deferred tax assets and liabilities, along with any related valuation allowance, to be presented as non-current within the Consolidated Balance Sheet. It is effective for annual reporting periods beginning after December 15, 2016, but early adoption is permitted. The Company currently reports both current and non-current deferred tax assets and liabilities; however, adoption of the guidance is not expected to have a material impact on its presentation of financial condition. In September 2015, the FASB issued guidance that requires acquirers in a business combination to recognize measurement period adjustments in the reporting period in which the adjustment amounts are determined. This is a change from the previous requirement that the adjustments be recorded retrospectively. The Company’s adoption of this standard, effective January 1, 2016, did not have a material impact on its consolidated financial statements. In August 2014, the FASB issued guidance that requires management to assess the Company’s ability to continue as a going concern and to provide related disclosures in certain circumstances. The standard is effective for public companies for annual periods beginning after December 15, 2016 and early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s presentation of, or disclosures in, its consolidated financial statements. In May 2014, the FASB issued guidance that supersedes revenue recognition requirements regarding contracts with customers to transfer goods or services or for the transfer of non-financial assets. Under the new guidance, entities are required to recognize revenue in order to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five-step analysis to be performed on transactions to determine when and how revenue is recognized. This new guidance is effective retroactively in fiscal years beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations.

General (Tables)

General (Tables)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of contribution to revenues and profits and pro forma	Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz made the following contributions to the Company’s revenues and profits (in thousands): Quarter Ended September 30, 2016 Quarter Ended September 30, 2015 Underground Solutions (1) Fyfe LMJ Concrete Schultz (2) Schultz (3) Revenues $ 8,273 $ 15 $ 1,446 $ 1,344 $ 6,777 $ 3,718 Net income (loss) 101 (202 ) (134 ) 68 193 57 _____________________ (1) The reported net income for Underground Solutions for the quarter ended September 30, 2016 includes an allocation of corporate expenses of $0.3 million . (2) The reported net income for Schultz for the quarter ended September 30, 2016 includes an allocation of corporate expenses of $0.3 million . (3) The reported net income for Schultz for the quarter ended September 30, 2015 includes an allocation of corporate expenses of $0.2 million . Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 Underground Solutions (1) Fyfe LMJ Concrete Schultz (2) Schultz (3) Revenues $ 23,916 $ 23 $ 2,779 $ 1,344 $ 17,098 $ 8,205 Net income (loss) (1,661 ) (300 ) (221 ) 68 (207 ) 31 _____________________ (1) The reported net loss for Underground Solutions for the nine months ended September 30, 2016 includes inventory step up expense of $3.6 million , recognized as part of the accounting for business combinations, and an allocation of corporate expenses of $1.6 million . (2) The reported net loss for Schultz for the nine months ended September 30, 2016 includes charges related to the 2016 Restructuring of $0.2 million and an allocation of corporate expenses of $0.6 million . (3) The reported net income for Schultz for the nine months ended September 30, 2015 includes an allocation of corporate expenses of $0.3 million . The following unaudited pro forma summary presents combined information of the Company as if the Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz acquisitions had occurred at the beginning of the year preceding their acquisition (in thousands, except earnings per share): Quarters Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Revenues $ 308,524 $ 373,710 $ 910,098 $ 1,044,248 Net income attributable to Aegion Corporation (1) 12,067 16,340 11,952 26,515 Diluted earnings per share $ 0.34 $ 0.45 $ 0.34 $ 0.72 _____________________ (1) Includes pro-forma adjustments for depreciation and amortization associated with acquired tangible and intangible assets, as if those assets were recorded at the beginning of the year preceding the acquisition date.
Schedule of fair value of assets acquired and liabilities assumed	The following table summarizes the fair value of identified assets and liabilities of the Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and Schultz acquisitions at their respective acquisition dates (in thousands): Underground Solutions Fyfe Europe LMJ Concrete Solutions Schultz Cash $ 3,630 $ — $ — $ — $ — Receivables and cost and estimated earnings in excess of billings 6,339 — — 1,469 1,086 Inventories 12,629 — 504 857 — Prepaid expenses and other current assets 587 — — 18 19 Property, plant and equipment 2,755 50 1,194 422 162 Identified intangible assets 33,370 513 795 1,722 3,060 Deferred income tax assets 12,906 — — — — Other assets 29 — — — — Accounts payable (4,653 ) — — (837 ) (663 ) Accrued expenses (5,481 ) — — (149 ) — Billings in excess of cost and estimated earnings (2,943 ) — — — — Deferred income tax liabilities (14,799 ) — — (482 ) — Total identifiable net assets $ 44,369 $ 563 $ 2,493 $ 3,020 $ 3,664 Total consideration recorded $ 88,370 $ 3,000 $ 3,235 $ 6,393 $ 7,662 Less: total identifiable net assets 44,369 563 2,493 3,020 3,664 Goodwill at September 30, 2016 $ 44,001 $ 2,437 $ 742 $ 3,373 $ 3,998

Accounting Policies (Tables)

Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Financial data for consolidated variable interest entities	Financial data for consolidated variable interest entities are summarized in the following table (in thousands): Balance sheet data September 30, (1) December 31, (2) Current assets $ 32,544 $ 60,730 Non-current assets 26,355 26,316 Current liabilities 9,187 24,784 Non-current liabilities 31,832 25,728 __________________________ (1) Amounts exclude the assets and liabilities of BPPC, which was sold in February 2016. (2) Amounts include $21.1 million of current assets and $7.0 million of current liabilities of BPPC, which were classified as held for sale. See Note 5. Nine Months Ended September 30, Income statement data 2016 (1) 2015 Revenue $ 35,409 $ 22,037 Gross profit 2,713 2,778 Net income (loss) (3,869 ) 144 __________________________ (1) Includes the results of BPPC through the date of its sale in February 2016.

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Summary of restructuring and related costs	The following tables summarize all charges related to the 2014 Restructuring recognized in the quarters and nine months ended September 30, 2016 and 2015 as presented in their affected line in the Consolidated Statements of Operations (in thousands): Quarters Ended September 30, 2016 2015 Non-Cash Cash Restructuring Charges (Reversals) (1) Total Non-Cash Cash (1) Total Cost of revenues $ — $ — $ — $ 1,678 $ (17 ) $ 1,661 Operating expenses (232 ) (130 ) (362 ) (829 ) 386 (443 ) Restructuring charges — — — — 172 172 Other expense (1 ) — (1 ) 66 42 108 Total pre-tax restructuring charges (reversals) (2) $ (233 ) $ (130 ) $ (363 ) $ 915 $ 583 $ 1,498 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) All charges relate to Infrastructure Solutions. Nine Months Ended September 30, 2016 2015 Non-Cash Cash Restructuring Charges (Reversals) (1) Total Non-Cash Cash (1) Total Cost of revenues $ — $ (14 ) $ (14 ) $ 1,546 $ 1,097 $ 2,643 Operating expenses (593 ) (71 ) (664 ) 441 3,748 4,189 Restructuring charges — 67 67 — 1,034 1,034 Other expense (2) 128 — 128 3,004 (140 ) 2,864 Total pre-tax restructuring charges (reversals) (3) $ (465 ) $ (18 ) $ (483 ) $ 4,991 $ 5,739 $ 10,730 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) Charges in the nine months ended September 30, 2015 primarily include the loss on sale of the CIPP contracting operation in France in February 2015, including the release of cumulative currency translation adjustments. (3) All charges relate to Infrastructure Solutions. During the quarter and nine months ended September 30, 2016 , the Company recorded pre-tax expense related to the 2016 Restructuring as follows (in thousands): Quarter Ended September 30, 2016 Infrastructure Solutions Corrosion Protection Energy Services Total Severance and benefit related costs $ — $ 48 $ 98 $ 146 Relocation and other moving costs — — 66 66 Other restructuring costs (1) (31 ) 130 976 1,075 Total pre-tax restructuring charges (reversals) (2) $ (31 ) $ 178 $ 1,140 $ 1,287 __________________________ (1) Includes charges primarily related to downsizing the Company’s upstream operations in California, inclusive of wind-down costs, professional fees, fixed asset disposals and certain other restructuring charges. (2) Includes l ess than $0.1 million of corporate-related restructuring charges that have been allocated to the reportable segments. Nine Months Ended September 30, 2016 Infrastructure Solutions Corrosion Protection Energy Services Total Severance and benefit related costs $ 2,256 $ 3,182 $ 1,501 $ 6,939 Lease termination costs — — 969 969 Relocation and other moving costs 307 62 200 569 Other restructuring costs (1) 777 628 4,909 6,314 Total pre-tax restructuring charges (2) $ 3,340 $ 3,872 $ 7,579 $ 14,791 __________________________ (1) Includes charges primarily related to downsizing the Company’s upstream operations in California, inclusive of wind-down costs, professional fees, fixed asset disposals and certain other restructuring charges. (2) Includes $1.2 million of corporate-related restructuring charges that have been allocated to the reportable segments. The following tables summarize all charges related to the 2016 Restructuring recognized in the quarter and nine months ended September 30, 2016 as presented in their affected line in the Consolidated Statements of Operations (in thousands): Quarter Ended September 30, 2016 Nine Months Ended September 30, 2016 Non-Cash Restructuring Charges Cash Restructuring Charges (1) Total Non-Cash Restructuring Charges Cash Restructuring Charges (1) Total Cost of revenues (2) $ — $ 130 $ 130 $ — $ 189 $ 189 Operating expenses (3) 257 688 945 516 5,360 5,876 Restructuring charges (4) — 212 212 — 8,477 8,477 Other expense (5) — — — 249 — 249 Total pre-tax restructuring charges $ 257 $ 1,030 $ 1,287 $ 765 $ 14,026 $ 14,791 __________________________ (1) Cash charges consist of charges incurred during the period that will be settled in cash, either during the current period or future periods. (2) All charges for the quarter and nine-month period ended September 30, 2016 relate to Corrosion Protection. (3) Includes charges of less than $0.1 million and $0.5 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Infrastructure Solutions. Includes charges of zero and $0.4 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Corrosion Protection. Includes charges of $1.0 million and $4.9 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Energy Services. (4) Includes charges of zero and $2.6 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Infrastructure Solutions. Includes charges of less than $0.1 million and $3.2 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Corrosion Protection. Includes charges of $0.2 million and $2.7 million for the quarter and nine-month period ended September 30, 2016, respectively, related to Energy Services. (5) All charges relate to the release of cumulative currency translation adjustments in Infrastructure Solutions. During the quarters and nine months ended September 30, 2016 and 2015 , the Company recorded pre-tax (income) expense related to the 2014 Restructuring as follows (in thousands): Quarters Ended Nine Months Ended 2016 2015 2016 2015 Severance and benefit related costs $ — $ 172 $ 67 $ 866 Lease termination costs — — — 168 Allowances for doubtful accounts (232 ) 339 (585 ) 1,630 Other restructuring costs (1) (131 ) 987 35 8,066 Total pre-tax restructuring charges (reversals) (2) $ (363 ) $ 1,498 $ (483 ) $ 10,730 __________________________ (1) The quarter and nine months ended September 30, 2015 include charges related to the write-off of certain other assets, including the loss on the sale of the CIPP contracting operation in France in February 2015, including the release of cumulative currency translation adjustments, professional fees and certain other restructuring charges. (2) All charges for the quarters and nine months ended September 30, 2016 and 2015 relate to Infrastructure Solutions.
Summary of restructuring activity	The following tables summarize the 2016 Restructuring activity during the first nine months of 2016 (in thousands): 2016 Utilized in 2016 Reserves at Cash (1) Non-Cash Severance and benefit related costs $ 6,939 $ 5,835 $ — $ 1,104 Lease termination costs 969 969 — — Relocation and other moving costs 569 569 — — Other restructuring costs 6,314 5,549 765 — Total pre-tax restructuring charges $ 14,791 $ 12,922 $ 765 $ 1,104 __________________________ (1) Refers to cash utilized to settle charges during the first nine months of 2016. The following tables summarize the 2014 Restructuring activity during the first nine months of 2016 and 2015 (in thousands): Utilized Reserves at December 31, 2015 Charge (Credit) to Income Foreign Currency Translation Cash (1) Non-Cash Reserves at September 30, 2016 Severance and benefit related costs $ — $ 67 $ — $ — $ — $ 67 Reserves for customer receivables (2) 6,605 (585 ) 45 — 3,739 2,326 Other restructuring costs 968 35 24 214 307 506 Total pre-tax restructuring charges (reversals) $ 7,573 $ (483 ) $ 69 $ 214 $ 4,046 $ 2,899 __________________________ (1) Refers to cash utilized to settle charges, either those reserved at December 31, 2015 or charged to income during the first nine months of 2016. (2) During the third quarter of 2016, the Company received payment on certain accounts receivable that were previously reserved. Additionally, the Company wrote off certain balances in costs and estimated earnings in excess of billings, along with the corresponding reserves, that were deemed fully uncollectible. Utilized Reserves at December 31, 2014 Charge Foreign Currency Translation Cash (1) Non-Cash Reserves at September 30, 2015 Severance and benefit related costs $ 466 $ 866 $ (7 ) $ 1,205 $ — $ 120 Lease termination expenses — 168 (2 ) 166 — — Reserves for customer receivables 11,464 1,630 (321 ) — 3,863 8,910 Other restructuring costs 2,496 8,066 (67 ) 4,045 4,832 1,618 Total pre-tax restructuring charges $ 14,426 $ 10,730 $ (397 ) $ 5,416 $ 8,695 $ 10,648 __________________________ (1) Refers to cash utilized to settle charges, either those reserved at December 31, 2014 or charged to income during the first nine months of 2015.

Share Information (Tables)

Share Information (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	Earnings per share have been calculated using the following share information: Quarters Ended Nine Months Ended 2016 2015 2016 2015 Weighted average number of common shares used for basic EPS 34,462,579 36,245,193 34,977,469 36,670,565 Effect of dilutive stock options and restricted and deferred stock unit awards 518,411 336,636 462,562 290,021 Weighted average number of common shares and dilutive potential common stock used in dilutive EPS 34,980,990 36,581,829 35,440,031 36,960,586

Assets Held For Sale (Tables)

Assets Held For Sale (Tables)	9 Months Ended
	Sep. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Summary of Components of Assets and Liabilities Held-for-sale	The following table provides the components of assets and liabilities held for sale (in thousands): December 31, 2015 Assets held for sale: Total current assets $ 8,559 Property, plant & equipment, less accumulated depreciation 12,501 Total assets held for sale $ 21,060 Liabilities held for sale: Total current liabilities $ 944 Debt 1,924 Deferred income tax liabilities 1,473 Other liabilities 2,620 Total liabilities held for sale $ 6,961 Non-controlling interests $ 7,142

Goodwill and Identified Intan26

Goodwill and Identified Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill The following table presents a reconciliation of the beginning and ending balances of the Company’s goodwill at January 1, 2016 and September 30, 2016 (in thousands): Infrastructure Corrosion Energy Total Balance, January 1, 2016 Goodwill, gross $ 190,525 $ 73,345 $ 80,246 $ 344,116 Accumulated impairment losses (16,069 ) (45,400 ) (33,527 ) (94,996 ) Goodwill, net 174,456 27,945 46,719 249,120 Acquisitions (1) 50,553 — — 50,553 Foreign currency translation 324 682 — 1,006 Balance, September 30, 2016 Goodwill, gross 241,402 74,027 80,246 395,675 Accumulated impairment losses (16,069 ) (45,400 ) (33,527 ) (94,996 ) Goodwill, net $ 225,333 $ 28,627 $ 46,719 $ 300,679 __________________________ (1) During the first nine months of 2016, the Company recorded goodwill of $44.0 million , $2.4 million , $0.8 million and $3.4 million related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ and Concrete Solutions, respectively (see Note 1).
Schedule of Identified Intangible Assets	Identified Intangible Assets Identified intangible assets consisted of the following (in thousands): (in thousands) September 30, 2016 December 31, 2015 Weighted Average Useful Lives (Years) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount License agreements (1) 9.5 $ 4,456 $ (3,400 ) $ 1,056 $ 3,893 $ (3,275 ) $ 618 Leases 11.1 2,064 (875 ) 1,189 2,065 (764 ) 1,301 Trademarks (2) 14.1 24,177 (7,454 ) 16,723 22,519 (6,262 ) 16,257 Non-competes (3) 2.1 1,313 (1,026 ) 287 1,210 (945 ) 265 Customer relationships (4) 11.9 187,860 (50,805 ) 137,055 164,779 (41,967 ) 122,812 Patents and acquired technology (5) 9.9 66,539 (23,497 ) 43,042 55,260 (22,395 ) 32,865 $ 286,409 $ (87,057 ) $ 199,352 $ 249,726 $ (75,608 ) $ 174,118 __________________________ (1) During the first nine months of 2016, the Company recorded license agreements of $0.6 million related to the acquisition of LMJ’s CIPP business (see Note 1). (2) During the first nine months of 2016, the Company recorded trademarks of $1.4 million , $0.1 million and $0.1 million related to the acquisitions of Underground Solutions, Fyfe Europe and Concrete Solutions, respectively (see Note 1). (3) During the first nine months of 2016, the Company recorded non-compete agreements of $0.1 million related to the acquisition of Fyfe Europe (see Note 1). (4) During the first nine months of 2016, the Company recorded customer relationships of $20.7 million , $0.3 million , $0.2 million and $1.6 million related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ’s CIPP business and Concrete Solutions, respectively (see Note 1). (5) During the first nine months of 2016, the Company recorded acquired technology of $11.3 million related to the acquisition of Underground Solutions (see Note 1).
Schedule of Estimated Amortization Expense	Estimated amortization expense by year is as follows (in thousands): 2016 $ 16,393 2017 17,182 2018 17,088 2019 16,846 2020 16,811

Long-Term Debt and Credit Fac27

Long-Term Debt and Credit Facility (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt, term note and notes payable consisted of the following (in thousands): September 30, December 31, Term note, due October 30, 2020, annualized rates of 2.85% and 2.47%, respectively $ 332,500 $ 345,625 Line of credit, 2.77% 36,000 — Other notes with interest rates from 3.3% to 6.5% 9,914 9,797 Subtotal 378,414 355,422 Less – Current maturities and notes payable 17,644 17,648 Less – Unamortized loan costs 3,628 4,294 Total $ 357,142 $ 333,480

Stockholders' Equity and Equi28

Stockholders' Equity and Equity Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Summary of all stock award activity	A summary of the stock award activity is as follows: Nine Months Ended Stock Awards Weighted Average Award Date Fair Value Outstanding at January 1, 2016 1,275,707 $ 19.60 Restricted shares awarded — — Restricted stock units awarded 318,205 18.42 Performance stock units awarded 244,937 18.35 Restricted shares distributed (159,406 ) 23.48 Restricted stock units distributed (14,034 ) 21.50 Performance stock units distributed — — Restricted shares forfeited (18,499 ) 23.16 Restricted stock units forfeited (64,871 ) 17.56 Performance stock units forfeited (55,936 ) 18.58 Outstanding at September 30, 2016 1,526,103 $ 18.81
Summary of all deferred stock unit activity	A summary of deferred stock unit activity is as follows: Nine Months Ended Deferred Stock Units Weighted Average Award Date Fair Value Outstanding at January 1, 2016 247,219 $ 19.92 Awarded 44,824 21.22 Distributed (39,660 ) 21.29 Outstanding at September 30, 2016 252,383 $ 19.93
Summary of stock option activity	A summary of stock option activity is as follows: Nine Months Ended Shares Weighted Average Exercise Price Outstanding at January 1, 2016 288,383 $ 21.73 Granted — — Exercised (18,193 ) 16.80 Canceled/Expired (1,836 ) 25.58 Outstanding at September 30, 2016 268,354 $ 22.04 Exercisable at September 30, 2016 268,354 $ 22.04
Financial data for stock option exercises	Financial data for stock option exercises are summarized as follows (in thousands): Nine Months Ended 2016 2015 Amount collected from stock option exercises $ 306 $ 1,465 Total intrinsic value of stock option exercises 47 282 Tax shortfall of stock option exercises recorded in additional paid-in-capital 315 109 Aggregate intrinsic value of outstanding stock options 102 379 Aggregate intrinsic value of exercisable stock options 102 379

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Financial Information by Segment	Financial information by segment was as follows (in thousands): Quarters Ended Nine Months Ended 2016 (1) 2015 (2) 2016 (3) 2015 (4) Revenues: Infrastructure Solutions $ 158,562 $ 149,606 $ 434,523 $ 421,170 Corrosion Protection 95,084 121,392 281,939 329,157 Energy Services 54,878 85,597 183,656 252,530 Total revenues $ 308,524 $ 356,595 $ 900,118 $ 1,002,857 Gross profit: Infrastructure Solutions $ 40,566 $ 38,428 $ 109,485 $ 106,074 Corrosion Protection 18,374 27,595 52,676 70,311 Energy Services 7,378 11,098 19,761 31,979 Total gross profit $ 66,318 $ 77,121 $ 181,922 $ 208,364 Operating income (loss): Infrastructure Solutions (5) $ 18,573 $ 16,255 $ 37,448 $ 35,701 Corrosion Protection (6) 513 6,886 (7,626 ) 8,323 Energy Services (7) 1,419 1,797 (5,311 ) 4,562 Total operating income 20,505 24,938 24,511 48,586 Other income (expense): Interest expense (3,825 ) (3,144 ) (11,081 ) (9,365 ) Interest income 37 25 197 229 Other 288 (359 ) (1,183 ) (2,360 ) Total other expense (3,500 ) (3,478 ) (12,067 ) (11,496 ) Income before taxes on income $ 17,005 $ 21,460 $ 12,444 $ 37,090 _______________________ (1) Results include: (i) $1.3 million of 2016 Restructuring charges (see Note 3); (ii) $0.4 million of 2014 Restructuring expense reversals (see Note 3); and (iii) $0.3 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets. (2) Results include (i) $1.5 million of 2014 Restructuring charges (see Note 3); and (ii) $(0.5) million of costs incurred related to the acquisition of Schultz and other acquisition targets. (3) Results include: (i) $14.8 million of 2016 Restructuring charges (see Note 3); (ii) $0.5 million of 2014 Restructuring expense reversals (see Note 3); (iii) $2.1 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets; and (iv) inventory step up expense of $3.6 million recognized as part of the accounting for business combinations. (4) Results include: (i) $10.7 million of 2014 Restructuring charges (see Note 3); and (ii) $0.8 million of costs incurred related to the acquisition of Schultz and other acquisition targets. (5) Operating income for the quarter ended September 30, 2016 includes: (i) less than $0.1 million of 2016 Restructuring charges (see Note 3); (ii) $0.4 million of 2014 Restructuring expense reversals (see Note 3); and (iii) $0.3 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets. Operating income for the quarter ended September 30, 2015 includes $1.4 million of 2014 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2016 includes: (i) $3.1 million of 2016 Restructuring charges (see Note 3); (ii) $0.5 million of 2014 Restructuring expense reversals (see Note 3); (iii) $2.1 million of costs incurred related to the acquisitions of Underground Solutions, Fyfe Europe, LMJ, Concrete Solutions and other acquisition targets; and (iv) inventory step up expense of $3.6 million recognized as part of the accounting for business combinations. Operating income for the nine months ended September 30, 2015 includes $7.9 million of 2014 Restructuring charges (see Note 3). (6) Operating income for the quarter ended September 30, 2016 includes $0.2 million of 2016 Restructuring charges (see Note 3). Operating income for the quarter ended September 30, 2015 includes $0.5 million of acquisition related expenses. Operating loss for the nine months ended September 30, 2016 includes $3.9 million of 2016 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2015 includes $0.5 million of acquisition related expenses. (7) Operating income for the quarter ended September 30, 2016 includes $1.1 million of 2016 Restructuring charges (see Note 3). Operating loss for the nine months ended September 30, 2016 includes $7.6 million of 2016 Restructuring charges (see Note 3). Operating income for the nine months ended September 30, 2015 includes $0.3 million of costs incurred related to the acquisition of Schultz.
Summary of Revenues, Gross Profit, and Operating Income by Geographic Region	The following table summarizes revenues, gross profit and operating income by geographic region (in thousands): Quarters Ended Nine Months Ended 2016 2015 2016 2015 Revenues (1) : United States $ 232,734 $ 267,001 $ 684,088 $ 742,976 Canada 39,161 45,340 94,113 131,391 Europe 13,850 14,905 43,771 42,668 Other foreign 22,779 29,349 78,146 85,822 Total revenues $ 308,524 $ 356,595 $ 900,118 $ 1,002,857 Gross profit: United States $ 51,217 $ 56,243 $ 138,869 $ 148,736 Canada 8,373 9,998 19,644 30,677 Europe 2,794 4,025 8,893 12,085 Other foreign 3,934 6,855 14,516 16,866 Total gross profit $ 66,318 $ 77,121 $ 181,922 $ 208,364 Operating income (loss): United States $ 15,402 $ 11,464 $ 15,547 $ 19,188 Canada 5,410 6,258 10,208 19,700 Europe 352 570 1,108 2,511 Other foreign (659 ) 6,646 (2,352 ) 7,187 Total operating income $ 20,505 $ 24,938 $ 24,511 $ 48,586 __________________________ (1) Revenues are attributed to the country of origin for the Company’s legal entities. For a significant majority of its legal entities, the country of origin relates to the country or geographic area that it services.

Derivative Financial Instrume30

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of fair value amounts of derivative instruments	The following table provides a summary of the fair value amounts of our derivative instruments, all of which are Level 2 inputs as defined below (in thousands): Designation of Derivatives Balance Sheet Location September 30, December 31, Derivatives Designated as Hedging Instruments: Forward Currency Contracts Prepaid expenses and other current assets $ — $ 18 Total Assets $ — $ 18 Forward Currency Contracts Accrued expenses $ 643 $ 243 Interest Rate Swaps Accrued expenses 4,859 13 Total Liabilities $ 5,502 $ 256 Derivatives Not Designated as Hedging Instruments: Forward Currency Contracts Prepaid expenses and other current assets $ — $ 91 Total Assets $ — $ 91 Forward Currency Contracts Accrued expenses $ 249 $ — Total Liabilities $ 249 $ — Total Derivative Assets $ — $ 109 Total Derivative Liabilities 5,751 256 Total Net Derivative Liability $ (5,751 ) $ (147 )
Schedule of assets and liabilities measured at fair value on a recurring basis	The following tables represent assets and liabilities measured at fair value on a recurring basis and the basis for that measurement at September 30, 2016 and December 31, 2015 (in thousands): Total Fair Value at Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Forward Currency Contracts $ — $ — $ — $ — Total $ — $ — $ — $ — Liabilities: Forward Currency Contracts $ 892 $ — $ 892 $ — Interest Rate Swap 4,859 — 4,859 — Total $ 5,751 $ — $ 5,751 $ — Total Fair Value at Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: Forward Currency Contracts $ 109 $ — $ 109 $ — Total $ 109 $ — $ 109 $ — Liabilities: Forward Currency Contracts $ 243 $ — $ 243 $ — Interest Rate Swap 13 — 13 — Total $ 256 $ — $ 256 $ —
Summary of derivative positions	The following table summarizes the Company’s derivative positions at September 30, 2016 : Position Notional Amount Weighted Average Remaining Maturity In Years Average Exchange Rate USD/EURO Sell € 3,641,000 0.3 1.13 USD/British Pound Sell £ 4,595,000 0.3 1.30 EURO/British Pound Sell £ 8,000,000 0.3 .87 Interest Rate Swap $ 249,375,000 4.1

General - Additional Informatio

General - Additional Information (Details) $ in Thousands, € in Millions, NZD in Millions

Jul. 01, 2016NZDcompany

Jul. 01, 2016USD ($)company

Jun. 02, 2016EUR (€)

Jun. 02, 2016USD ($)

May 13, 2016USD ($)

Feb. 18, 2016USD ($)

Feb. 01, 2016USD ($)

Mar. 01, 2015USD ($)

Jul. 31, 2015USD ($)

Feb. 28, 2015USD ($)

Mar. 31, 2016USD ($)

Sep. 30, 2016NZDcountry

Sep. 30, 2016USD ($)country

Sep. 30, 2015USD ($)

Dec. 31, 2015USD ($)

Jul. 01, 2016USD ($)

General [Line Items]

Contingent consideration payment

$ 500

$ 684

Restructuring Plan 2016

General [Line Items]

Impact on earnings

17,000

CSL and BCS [Member]

General [Line Items]

Number of companies acquired | company

2

2

Total consideration recorded

NZD 8.9

$ 6,400

Amount held in escrow | NZD

0.5

Milestone payments

NZD 2

$ 1,400

Cash payments to acquire business

7.5

5,400

Working capital adjustment

0.2

$ 100

Estimated earnout consideration

NZD 1.2

$ 900

LMJ

General [Line Items]

Total consideration recorded

€ 2.9

$ 3,235

Fyfe Europe

General [Line Items]

Total consideration recorded

$ 3,000

Number of countries in which entity operates | country

72

72

Cash payments to acquire business

2,800

Contingent consideration paid

$ 200

Schultz Mechanical Contractors, Inc.

General [Line Items]

Total consideration recorded

$ 7,662

Cash payments to acquire business

6,700

Purchase price

7,100

Working capital adjustment

400

Adjustment to account for deferred consideration

$ 1,000

Contingent consideration paid

$ 500

Underground Solutions

General [Line Items]

Total consideration recorded

$ 88,370

Cash payments to acquire business

85,000

Discounted value of net operating loss tax assets

5,000

Consideration transferred, funds held in escrow

6,300

Foreign earnings repatriated

30,400

Foreign earnings repatriated, tax impact

3,500

Working capital adjustment

$ (1,600)

CRTS

General [Line Items]

Contingent consideration payment

$ 1,000

Proceeds from settlement of escrow claims

$ 700

CRTS | Operating Expense

General [Line Items]

Proceeds from settlement of escrow claims

200

CRTS | Other Operating Income (Expense)

General [Line Items]

Proceeds from settlement of escrow claims

$ 800

Video Injection - Instituform SAS

General [Line Items]

Exclusive tube supply agreement

5 years

Loss on disposition of business

$ 2,900

Bayou Perma-Pipe Canada, Ltd

General [Line Items]

Ownership interest

51.00%

Consideration received

$ 9,600

Proceeds from divestiture

7,600

Disposal, note receivable

$ 2,000

Expected loss from disposal, before tax

$ 600

General - Contributions to Reve

General - Contributions to Revenues and Profits Since Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Restructuring charges	$ 212	$ 172	$ 8,544	$ 1,034
Underground Solutions
Business Acquisition [Line Items]
Revenues	8,273		23,916
Net income (loss)	101		(1,661)
Fyfe Europe
Business Acquisition [Line Items]
Revenues	15		23
Net income (loss)	(202)		(300)
LMJ
Business Acquisition [Line Items]
Revenues	1,446		2,779
Net income (loss)	(134)		(221)
Concrete Solutions
Business Acquisition [Line Items]
Revenues	1,344		1,344
Net income (loss)	68		68
Schultz Mechanical Contractors, Inc.
Business Acquisition [Line Items]
Revenues	6,777	3,718	17,098	8,205
Net income (loss)	193	57	(207)	31
Restructuring charges			200
Corporate, Non-Segment | Underground Solutions
Business Acquisition [Line Items]
Net income (loss)	(300)		(1,600)
Corporate, Non-Segment | Schultz Mechanical Contractors, Inc.
Business Acquisition [Line Items]
Net income (loss)	$ (300)	$ (200)	$ (600)	$ (300)

General - Pro Forma Information

General - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Revenues	$ 308,524	$ 373,710	$ 910,098	$ 1,044,248
Net income attributable to Parent	$ 12,067	$ 16,340	$ 11,952	$ 26,515
Diluted earnings per share (in dollars per share)	$ 0.34	$ 0.45	$ 0.34	$ 0.72

General - Fair Value of Identif

General - Fair Value of Identified Assets and Liabilities (Details) $ in Thousands, € in Millions	Jul. 01, 2016USD ($)	Jun. 02, 2016EUR (€)	Jun. 02, 2016USD ($)	May 13, 2016USD ($)	Feb. 18, 2016USD ($)	Mar. 01, 2015USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Goodwill							$ 300,679	$ 249,120
Underground Solutions
Business Acquisition [Line Items]
Cash					$ 3,630
Receivables and cost and estimated earnings in excess of billings					6,339
Inventories					12,629
Prepaid expenses and other current assets					587
Property, plant and equipment					2,755
Identified intangible assets					33,370
Deferred income tax assets					12,906
Other assets					29
Accounts payable					(4,653)
Accrued expenses					(5,481)
Billings in excess of cost and estimated earnings					(2,943)
Deferred income tax liabilities					(14,799)
Total identifiable net assets					44,369
Total consideration recorded					88,370
Less: total identifiable net assets					$ 44,369
Goodwill							44,001
Fyfe Europe
Business Acquisition [Line Items]
Cash				$ 0
Receivables and cost and estimated earnings in excess of billings				0
Inventories				0
Prepaid expenses and other current assets				0
Property, plant and equipment				50
Identified intangible assets				513
Deferred income tax assets				0
Other assets				0
Accounts payable				0
Accrued expenses				0
Billings in excess of cost and estimated earnings				0
Deferred income tax liabilities				0
Total identifiable net assets				563
Total consideration recorded				3,000
Less: total identifiable net assets				$ 563
Goodwill							2,437
LMJ
Business Acquisition [Line Items]
Cash			$ 0
Receivables and cost and estimated earnings in excess of billings			0
Inventories			504
Prepaid expenses and other current assets			0
Property, plant and equipment			1,194
Identified intangible assets			795
Deferred income tax assets			0
Other assets			0
Accounts payable			0
Accrued expenses			0
Billings in excess of cost and estimated earnings			0
Deferred income tax liabilities			0
Total identifiable net assets			2,493
Total consideration recorded		€ 2.9	3,235
Less: total identifiable net assets			$ 2,493
Goodwill							742
Concrete Solutions
Business Acquisition [Line Items]
Cash	$ 0
Receivables and cost and estimated earnings in excess of billings	1,469
Inventories	857
Prepaid expenses and other current assets	18
Property, plant and equipment	422
Identified intangible assets	1,722
Deferred income tax assets	0
Other assets	0
Accounts payable	(837)
Accrued expenses	(149)
Billings in excess of cost and estimated earnings	0
Deferred income tax liabilities	(482)
Total identifiable net assets	3,020
Total consideration recorded	6,393
Less: total identifiable net assets	$ 3,020
Goodwill							3,373
Schultz Mechanical Contractors, Inc.
Business Acquisition [Line Items]
Cash						$ 0
Receivables and cost and estimated earnings in excess of billings						1,086
Inventories						0
Prepaid expenses and other current assets						19
Property, plant and equipment						162
Identified intangible assets						3,060
Deferred income tax assets						0
Other assets						0
Accounts payable						(663)
Accrued expenses						0
Billings in excess of cost and estimated earnings						0
Deferred income tax liabilities						0
Total identifiable net assets						3,664
Total consideration recorded						7,662
Less: total identifiable net assets						$ 3,664
Goodwill							$ 3,998

Accounting Policies - Additiona

Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Abstract]
Net foreign exchange transaction gains (loss)	$ 300	$ 100	$ (1,351)	$ (284)
Accumulated income (loss) related to currency translation adjustments	(43,200)	(44,500)	(43,200)	(44,500)
Accumulated income (loss) related to derivative transactions	(5,500)	(500)	(5,500)	(500)
Accumulated income (loss) related to pension activity	$ 500	$ 500	$ 500	$ 500

Accounting Policies - VIE Balan

Accounting Policies - VIE Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Current assets	$ 32,544	$ 60,730
Non-current assets	26,355	26,316
Current liabilities	9,187	24,784
Non-current liabilities	$ 31,832	25,728
Held-for-sale
Schedule of Equity Method Investments [Line Items]
Assets held for sale		21,060
Liabilities held for sale		$ 6,961

Accounting Policies - VIE Incom

Accounting Policies - VIE Income Statement (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accounting Policies [Abstract]
Revenue	$ 35,409	$ 22,037
Gross profit	2,713	2,778
Net income (loss)	$ (3,869)	$ 144

Restructuring - Additional Info

Restructuring - Additional Information (Details)	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)employeeheadcount	Sep. 30, 2015USD ($)	Jun. 30, 2016USD ($)	Oct. 06, 2014USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 212,000	$ 172,000	$ 8,544,000	$ 1,034,000
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Impact on earnings			$ 17,000,000
Expected number of positions eliminated | employee			960
Number of positions eliminated, percent			15.50%
Restructuring charges	1,287,000		$ 14,791,000
Restructuring charges, net of tax			9,700,000
Pre-tax charges (reversals) related to restructuring	1,287,000		14,791,000
Utilized - Non-Cash			765,000
Utilized - Cash			12,922,000
Restructuring Plan 2016 | Corrosion Protection
Restructuring Cost and Reserve [Line Items]
Restructuring charges	178,000		3,872,000
Restructuring Plan 2016 | Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(31,000)		3,340,000
Restructuring Plan 2016 | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated remaining restructuring costs to be incurred	700,000		700,000
Restructuring Plan 2016 | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated remaining restructuring costs to be incurred	15,500,000		15,500,000
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(400,000)	1,500,000	(500,000)	10,700,000
Estimated annual savings			$ 10,800,000
Number of terminations during period | headcount			86
Pre-tax charges (reversals) related to restructuring	(363,000)	1,498,000	$ (483,000)	10,730,000	$ 60,000,000
Restructuring costs, after tax results					44,600,000
Utilized - Non-Cash			4,046,000	8,695,000	48,300,000
Utilized - Cash			214,000	5,416,000	$ 11,700,000
Restructuring Plan 2014 | Corrosion Protection
Restructuring Cost and Reserve [Line Items]
Estimated annual savings			2,400,000
Total pre-tax restructuring charges to date						$ 22,200,000
Restructuring Plan 2014 | Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(400,000)	1,400,000	(500,000)	7,900,000
Estimated annual savings			8,400,000
Total pre-tax restructuring charges to date						$ 26,100,000
Employee Severance and Lease Termination | Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	200,000		8,500,000
Employee Severance and Lease Termination | Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 200,000	$ 100,000	$ 1,000,000

Restructuring - Restructuring C

Restructuring - Restructuring Costs by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	$ 212	$ 172	$ 8,544	$ 1,034
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	1,287		14,791
Restructuring Plan 2016 | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	100		1,200
Restructuring Plan 2016 | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	146		6,939
Restructuring Plan 2016 | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring			969
Restructuring Plan 2016 | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	66		569
Restructuring Plan 2016 | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	1,075		6,314
Restructuring Plan 2016 | Infrastructure Solutions
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	(31)		3,340
Restructuring Plan 2016 | Infrastructure Solutions | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	0		2,256
Restructuring Plan 2016 | Infrastructure Solutions | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring			0
Restructuring Plan 2016 | Infrastructure Solutions | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	0		307
Restructuring Plan 2016 | Infrastructure Solutions | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	(31)		777
Restructuring Plan 2016 | Corrosion Protection
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	178		3,872
Restructuring Plan 2016 | Corrosion Protection | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	48		3,182
Restructuring Plan 2016 | Corrosion Protection | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring			0
Restructuring Plan 2016 | Corrosion Protection | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	0		62
Restructuring Plan 2016 | Corrosion Protection | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	130		628
Restructuring Plan 2016 | Energy Services
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	1,140		7,579	$ 7,600
Restructuring Plan 2016 | Energy Services | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	98		1,501
Restructuring Plan 2016 | Energy Services | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring			969
Restructuring Plan 2016 | Energy Services | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	66		200
Restructuring Plan 2016 | Energy Services | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Pre-tax charges related to restructuring	$ 976		$ 4,909

Restructuring - Restructuring R

Restructuring - Restructuring Reserve by Type of Cost (Details) - USD ($)	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	$ 257,000		$ 765,000
Cash Restructuring Charges (Reversals)	1,030,000		14,026,000
Pre-tax charges (reversals) related to restructuring	1,287,000		14,791,000
Restructuring Plan 2016 | Cost of revenues
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	0		0
Cash Restructuring Charges (Reversals)	130,000		189,000
Pre-tax charges (reversals) related to restructuring	130,000		189,000
Restructuring Plan 2016 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	257,000		516,000
Cash Restructuring Charges (Reversals)	688,000		5,360,000
Pre-tax charges (reversals) related to restructuring	945,000		5,876,000
Restructuring Plan 2016 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	0		0
Cash Restructuring Charges (Reversals)	212,000		8,477,000
Pre-tax charges (reversals) related to restructuring	212,000		8,477,000
Restructuring Plan 2016 | Other expense
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	0		249,000
Cash Restructuring Charges (Reversals)	0		0
Pre-tax charges (reversals) related to restructuring	0		249,000
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	(233,000)	$ 915,000	(465,000)	$ 4,991,000
Cash Restructuring Charges (Reversals)	(130,000)	583,000	(18,000)	5,739,000
Pre-tax charges (reversals) related to restructuring	(363,000)	1,498,000	(483,000)	10,730,000	$ 60,000,000
Restructuring Plan 2014 | Cost of revenues
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	0	1,678,000	0	1,546,000
Cash Restructuring Charges (Reversals)	0	(17,000)	(14,000)	1,097,000
Pre-tax charges (reversals) related to restructuring	0	1,661,000	(14,000)	2,643,000
Restructuring Plan 2014 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	(232,000)	(829,000)	(593,000)	441,000
Cash Restructuring Charges (Reversals)	(130,000)	386,000	(71,000)	3,748,000
Pre-tax charges (reversals) related to restructuring	(362,000)	(443,000)	(664,000)	4,189,000
Restructuring Plan 2014 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	0	0	0	0
Cash Restructuring Charges (Reversals)	0	172,000	67,000	1,034,000
Pre-tax charges (reversals) related to restructuring	0	172,000	67,000	1,034,000
Restructuring Plan 2014 | Other expense
Restructuring Cost and Reserve [Line Items]
Non-Cash Restructuring Charges (Reversals)	(1,000)	66,000	128,000	3,004,000
Cash Restructuring Charges (Reversals)	0	42,000	0	(140,000)
Pre-tax charges (reversals) related to restructuring	(1,000)	$ 108,000	128,000	$ 2,864,000
Infrastructure Solutions | Restructuring Plan 2016 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	100,000		500,000
Infrastructure Solutions | Restructuring Plan 2016 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	0		2,600,000
Corrosion Protection | Restructuring Plan 2016 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	0		400,000
Corrosion Protection | Restructuring Plan 2016 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	100,000		3,200,000
Energy Services | Restructuring Plan 2016 | Operating expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	1,000,000		4,900,000
Energy Services | Restructuring Plan 2016 | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Pre-tax charges (reversals) related to restructuring	$ 200,000		$ 2,700,000

Restructuring - Restructuring P

Restructuring - Restructuring Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 212	$ 172	$ 8,544	$ 1,034
Restructuring Plan 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,287		14,791
Restructuring Reserve [Roll Forward]
Charge (Credit) to Income	1,287		14,791
Utilized - Cash			12,922
Utilized - Non-Cash			765
Ending balance	1,104		1,104
Restructuring Plan 2016 | Severance and benefit related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	146		6,939
Restructuring Reserve [Roll Forward]
Utilized - Cash			5,835
Utilized - Non-Cash			0
Ending balance	1,104		1,104
Restructuring Plan 2016 | Lease termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			969
Restructuring Reserve [Roll Forward]
Utilized - Cash			969
Utilized - Non-Cash			0
Ending balance	0		0
Restructuring Plan 2016 | Relocation and other moving costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	66		569
Restructuring Reserve [Roll Forward]
Utilized - Cash			569
Utilized - Non-Cash			0
Ending balance	0		0
Restructuring Plan 2016 | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,075		6,314
Restructuring Reserve [Roll Forward]
Utilized - Cash			5,549
Utilized - Non-Cash			765
Ending balance	0		0
Restructuring Plan 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(400)	1,500	(500)	10,700
Restructuring Reserve [Roll Forward]
Beginning balance			7,573	14,426
Charge (Credit) to Income	(363)	1,498	(483)	10,730	$ 60,000
Foreign Currency Translation			69	(397)
Utilized - Cash			214	5,416	11,700
Utilized - Non-Cash			4,046	8,695	$ 48,300
Ending balance	2,899	10,648	2,899	10,648
Restructuring Plan 2014 | Severance and benefit related costs
Restructuring Reserve [Roll Forward]
Beginning balance			0	466
Charge (Credit) to Income	0	172	67	866
Foreign Currency Translation			0	(7)
Utilized - Cash			0	1,205
Utilized - Non-Cash			0	0
Ending balance	67	120	67	120
Restructuring Plan 2014 | Lease termination costs
Restructuring Reserve [Roll Forward]
Beginning balance				0
Charge (Credit) to Income	0	0	0	168
Foreign Currency Translation				(2)
Utilized - Cash				166
Utilized - Non-Cash				0
Ending balance		0		0
Restructuring Plan 2014 | Reserves for customer receivables
Restructuring Reserve [Roll Forward]
Beginning balance			6,605	11,464
Charge (Credit) to Income	(232)	339	(585)	1,630
Foreign Currency Translation			45	(321)
Utilized - Cash			0	0
Utilized - Non-Cash			3,739	3,863
Ending balance	2,326	8,910	2,326	8,910
Restructuring Plan 2014 | Other restructuring costs
Restructuring Reserve [Roll Forward]
Beginning balance			968	2,496
Charge (Credit) to Income	(131)	987	35	8,066
Foreign Currency Translation			24	(67)
Utilized - Cash			214	4,045
Utilized - Non-Cash			307	4,832
Ending balance	$ 506	$ 1,618	$ 506	$ 1,618

Share Information - Earnings Pe

Share Information - Earnings Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Weighted average number of common shares used for basic EPS (in shares)	34,462,579	36,245,193	34,977,469	36,670,565
Effect of dilutive stock options and restricted and deferred stock unit awards (in shares)	518,411	336,636	462,562	290,021
Weighted average number of common shares and dilutive potential common stock used in dilutive EPS (in shares)	34,980,990	36,581,829	35,440,031	36,960,586

Share Information - Additional

Share Information - Additional Information (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of earnings per share (in shares)	162,178	270,190	160,191	280,552

Assets Held For Sale - Addition

Assets Held For Sale - Additional Information (Details)	Dec. 31, 2015
Bayou Perma-Pipe Canada, Ltd | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	51.00%

Assets Held For Sale - Componen

Assets Held For Sale - Components of Assets and Liabilities Held-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets held for sale:
Total current assets	$ 0	$ 21,060
Liabilities held for sale:
Total current liabilities	$ 0	6,961
Held-for-sale
Assets held for sale:
Total current assets		8,559
Property, plant & equipment, less accumulated depreciation		12,501
Total assets held for sale		21,060
Liabilities held for sale:
Total current liabilities		944
Debt		1,924
Deferred income tax liabilities		1,473
Other liabilities		2,620
Total liabilities held for sale		6,961
Non-controlling interests		$ 7,142

Goodwill and Identified Intan46

Goodwill and Identified Intangible Assets - Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Goodwill [Roll Forward]
Goodwill, gross	$ 344,116
Accumulated impairment losses	(94,996)
Goodwill, beginning balance	249,120
Additions to goodwill through acquisitions	50,553
Foreign currency translation	1,006
Goodwill, gross	395,675
Accumulated impairment losses	(94,996)
Goodwill, ending balance	300,679
Underground Solutions
Goodwill [Roll Forward]
Additions to goodwill through acquisitions	44,000
Goodwill, ending balance	44,001
Fyfe Europe
Goodwill [Roll Forward]
Additions to goodwill through acquisitions	2,400
Goodwill, ending balance	2,437
LMJ
Goodwill [Roll Forward]
Additions to goodwill through acquisitions	800
Goodwill, ending balance	742
Concrete Solutions
Goodwill [Roll Forward]
Additions to goodwill through acquisitions	3,400
Goodwill, ending balance	3,373
Infrastructure Solutions
Goodwill [Roll Forward]
Goodwill, gross	190,525
Accumulated impairment losses	(16,069)
Goodwill, beginning balance	174,456
Additions to goodwill through acquisitions	50,553
Foreign currency translation	324
Goodwill, gross	241,402
Accumulated impairment losses	(16,069)
Goodwill, ending balance	225,333
Corrosion Protection
Goodwill [Roll Forward]
Goodwill, gross	73,345
Accumulated impairment losses	(45,400)
Goodwill, beginning balance	27,945
Additions to goodwill through acquisitions	0
Foreign currency translation	682
Goodwill, gross	74,027
Accumulated impairment losses	(45,400)
Goodwill, ending balance	28,627
Energy Services
Goodwill [Roll Forward]
Goodwill, gross	80,246
Accumulated impairment losses	(33,527)
Goodwill, beginning balance	46,719
Additions to goodwill through acquisitions	0
Foreign currency translation	0
Goodwill, gross	80,246
Accumulated impairment losses	(33,527)
Goodwill, ending balance	$ 46,719

Goodwill and Identified Intan47

Goodwill and Identified Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 286,409	$ 249,726
Accumulated Amortization	(87,057)	(75,608)
Net Carrying Amount	$ 199,352	174,118
License Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	9 years 6 months
Gross Carrying Amount	$ 4,456	3,893
Accumulated Amortization	(3,400)	(3,275)
Net Carrying Amount	1,056	618
License Agreements | LMJ
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 600
Leases
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	11 years 1 month 2 days
Gross Carrying Amount	$ 2,064	2,065
Accumulated Amortization	(875)	(764)
Net Carrying Amount	$ 1,189	1,301
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	14 years 25 days
Gross Carrying Amount	$ 24,177	22,519
Accumulated Amortization	(7,454)	(6,262)
Net Carrying Amount	16,723	16,257
Trademarks | Underground Solutions
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	1,400
Trademarks | Fyfe Europe
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	100
Trademarks | Concrete Solutions
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 100
Non-competes
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	2 years 25 days
Gross Carrying Amount	$ 1,313	1,210
Accumulated Amortization	(1,026)	(945)
Net Carrying Amount	287	265
Non-competes | Fyfe Europe
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 100
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	11 years 10 months 17 days
Gross Carrying Amount	$ 187,860	164,779
Accumulated Amortization	(50,805)	(41,967)
Net Carrying Amount	137,055	122,812
Customer Relationships | Underground Solutions
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	20,700
Customer Relationships | Fyfe Europe
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	300
Customer Relationships | LMJ
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	200
Customer Relationships | Concrete Solutions
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 1,600
Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	9 years 10 months 25 days
Gross Carrying Amount	$ 66,539	55,260
Accumulated Amortization	(23,497)	(22,395)
Net Carrying Amount	43,042	$ 32,865
Patents and acquired technology | Underground Solutions
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired	$ 11,300

Goodwill and Identified Intan48

Goodwill and Identified Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 4.2	$ 3.5	$ 12.2	$ 9.9

Goodwill and Identified Intan49

Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense (Details) $ in Thousands	Sep. 30, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 16,393
2,017	17,182
2,018	17,088
2,019	16,846
2,020	$ 16,811

Long-Term Debt and Credit Fac50

Long-Term Debt and Credit Facility - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Subtotal	$ 378,414	$ 355,422
Less – Current maturities and notes payable	17,644	17,648
Less – Unamortized loan costs	3,628	4,294
Total	357,142	333,480
Term Note
Debt Instrument [Line Items]
Term note, due October 30, 2020, annualized rates of 2.85% and 2.47%, respectively	$ 332,500	$ 345,625
Current effective interest rate	2.85%	2.47%
Line of Credit
Debt Instrument [Line Items]
Line of credit, 2.77%	$ 36,000	$ 0
Current effective interest rate	2.77%
Other notes
Debt Instrument [Line Items]
Other notes with interest rates from 3.3% to 6.5%	$ 9,914	$ 9,797
Other notes | Minimum
Debt Instrument [Line Items]
Current annualized interest rate	3.30%	3.30%
Other notes | Maximum
Debt Instrument [Line Items]
Current annualized interest rate	6.50%	6.50%

Long-Term Debt and Credit Fac51

Long-Term Debt and Credit Facility - Additional Information (Details)	1 Months Ended	9 Months Ended
	Oct. 31, 2015	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Mar. 31, 2017	Dec. 31, 2015USD ($)	Oct. 30, 2015USD ($)
Debt Instrument [Line Items]
Amount retired under prior credit facility						$ 344,700,000
Proceeds from line of credit		$ 42,000,000	$ 26,000,000
Debt designated as third-party debt		9,600,000			$ 9,600,000
Third-party notes and bank debt held		300,000			100,000
Unamortized loan costs		(3,628,000)			(4,294,000)
Long-term debt, fair value		$ 373,400,000			$ 349,100,000
2015 Interest Rate Swap
Debt Instrument [Line Items]
Notional Amount						$ 262,500,000
Fixed interest rate						1.46%
2015 Credit Facility
Debt Instrument [Line Items]
Senior secured credit facility						$ 650,000,000
Maximum borrowing capacity						350,000,000
Term of revolving line of credit	5 years
Term of term loan facility	5 years
Interest rate at period end		2.85%
Term note, due October 30, 2020, annualized rates of 2.85% and 2.47%, respectively		$ 332,500,000
Proceeds from line of credit		36,000,000
Letters of credit issued and outstanding		$ 36,300,000
Portion of amortization of term loan						262,500,000
Initial maximum financial leverage ratio					3.75
Actual financial leverage ratio		3.65
Remaining borrowing capacity		$ 37,400,000
Minimum permitted fixed charge coverage ratio		1.25
Actual fixed charge coverage ratio		1.49
2015 Credit Facility | Insurance Carriers Collateral
Debt Instrument [Line Items]
Letters of credit issued and outstanding		$ 19,400,000
2015 Credit Facility | Work Performance Obligations
Debt Instrument [Line Items]
Letters of credit issued and outstanding		$ 16,800,000
2015 Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
2015 Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
2015 Credit Facility | Underground Solutions
Debt Instrument [Line Items]
Proceeds from line of credit		$ 30,000,000
Initial maximum financial leverage ratio		4
2015 Credit Facility | Small Acquisition
Debt Instrument [Line Items]
Proceeds from line of credit		$ 3,000,000
2013 Credit Facility
Debt Instrument [Line Items]
Term note, due October 30, 2020, annualized rates of 2.85% and 2.47%, respectively					$ 345,600,000
Line of credit					0
Held-for-sale
Debt Instrument [Line Items]
Debt listed as held for sale					$ 1,924,000
Scenario, Forecast | 2015 Credit Facility
Debt Instrument [Line Items]
Initial maximum financial leverage ratio				3.75
Line of Credit | 2015 Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 300,000,000
Proceeds from line of credit		$ 3,000,000

Stockholders' Equity and Equi52

Stockholders' Equity and Equity Compensation - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Aug. 31, 2016	Mar. 31, 2016	Nov. 30, 2015
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Share repurchase program, authorized amount	$ 10,000,000		$ 10,000,000		$ 10,000,000	$ 20,000,000	$ 20,000,000
Closing stock price (in dollars per share)	$ 19.07	$ 16.48	$ 19.07	$ 16.48
Stock options awarded during period (in shares)			0	0
Stock Options
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Share based compensation expense			$ 19,000	$ 100,000
Stock Options | Minimum
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Award vesting period			7 years
Stock Options | Maximum
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Award vesting period			10 years
Stock Awards
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Share based compensation expense	$ 2,100,000	$ 2,200,000	$ 6,700,000	5,800,000
Unrecognized share based compensation expense	$ 15,100,000		$ 15,100,000
Weighted average recognition period			1 year 10 months 20 days
Deferred Stock Units
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Share based compensation expense			$ 1,000,000	$ 1,000,000
2016 Employee Plan
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Number of shares of common stock reserved for issuance (in shares)	1,132,739		1,132,739
Number of shares available for issuance (in shares)	1,126,702		1,126,702
2016 Director Plan
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Number of shares of common stock reserved for issuance (in shares)	166,456		166,456
Number of shares available for issuance (in shares)	165,414		165,414
Open Market Repurchase Program
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Stock repurchased during period (in shares)			1,908,380
Stock repurchased during period, value			$ 35,400,000
Shares repurchased, average price per share (in dollars per share)			$ 18.57
Equity Compensation Programs
Stockholders' Equity and Equity Compensation (Details) [Line Items]
Share repurchase program, authorized amount	$ 10,000,000		$ 10,000,000
Stock repurchased during period (in shares)			58,967
Stock repurchased during period, value			$ 1,200,000
Shares repurchased, average price per share (in dollars per share)			$ 19.67

Stockholders' Equity and Equi53

Stockholders' Equity and Equity Compensation - Summary of Stock Award Activity (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Stock Awards
Outstanding, beginning balance (in shares) | shares	1,275,707
Outstanding, ending balance (in shares) | shares	1,526,103
Weighted Average Award Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 19.60
Outstanding, ending balance (in dollars per share) | $ / shares	$ 18.81
Restricted Stock
Stock Awards
Awarded (in shares) | shares	0
Distributed (in shares) | shares	(159,406)
Forfeited (in shares) | shares	(18,499)
Weighted Average Award Date Fair Value
Awarded (in dollars per share) | $ / shares	$ 0
Distributed (in dollars per share) | $ / shares	23.48
Forfeited (in dollars per share) | $ / shares	$ 23.16
Restricted Stock Units
Stock Awards
Awarded (in shares) | shares	318,205
Distributed (in shares) | shares	(14,034)
Forfeited (in shares) | shares	(64,871)
Weighted Average Award Date Fair Value
Awarded (in dollars per share) | $ / shares	$ 18.42
Distributed (in dollars per share) | $ / shares	21.50
Forfeited (in dollars per share) | $ / shares	$ 17.56
Performance Stock Units
Stock Awards
Awarded (in shares) | shares	244,937
Distributed (in shares) | shares	0
Forfeited (in shares) | shares	(55,936)
Weighted Average Award Date Fair Value
Awarded (in dollars per share) | $ / shares	$ 18.35
Distributed (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	$ 18.58

Stockholders' Equity and Equi54

Stockholders' Equity and Equity Compensation - Summary of Deferred Stock Unit Activity (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Deferred Stock Units
Outstanding, beginning balance (in shares) | shares	1,275,707
Outstanding, ending balance (in shares) | shares	1,526,103
Weighted Average Award Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 19.60
Outstanding, ending balance (in dollars per share) | $ / shares	$ 18.81
Deferred Stock Units
Deferred Stock Units
Outstanding, beginning balance (in shares) | shares	247,219
Awarded (in shares) | shares	44,824
Distributed (in shares) | shares	(39,660)
Outstanding, ending balance (in shares) | shares	252,383
Weighted Average Award Date Fair Value
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 19.92
Awarded (in dollars per share) | $ / shares	21.22
Distributed (in dollars per share) | $ / shares	21.29
Outstanding, ending balance (in dollars per share) | $ / shares	$ 19.93

Stockholders' Equity and Equi55

Stockholders' Equity and Equity Compensation - Summary of Stock Option Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Shares
Outstanding, beginning balance (in shares)	288,383
Granted (in shares)	0	0
Exercised (in shares)	(18,193)
Canceled/Expired (in shares)	(1,836)
Outstanding, ending balance (in shares)	268,354
Exercisable (in shares)	268,354
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)	$ 21.73
Granted (in dollars per share)	0
Exercised (in dollars per share)	16.80
Canceled/Expired (in dollars per share)	25.58
Outstanding, ending balance (in dollars per share)	22.04
Exercisable (in dollars per share)	$ 22.04

Stockholders' Equity and Equi56

Stockholders' Equity and Equity Compensation - Financial Data for Stock Option Exercises (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Equity [Abstract]
Amount collected from stock option exercises	$ 306	$ 1,465
Total intrinsic value of stock option exercises	47	282
Tax shortfall of stock option exercises recorded in additional paid-in-capital	315	109
Aggregate intrinsic value of outstanding stock options	102	379
Aggregate intrinsic value of exercisable stock options	$ 102	$ 379

Taxes on Income (Details)

Taxes on Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax expense (benefit) rate	30.70%	29.10%	11.40%	31.40%
Change in valuation allowance			$ 1.9
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent			15.30%

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Conditional Agreement
Loss Contingencies [Line Items]
Loss contingency accrual				$ 2.7
Customer receivable write off			$ 7.5
Pre-Acquisition Related Contingencies | Brinderson LP
Loss Contingencies [Line Items]
Loss contingency accrual	$ 6			$ 10.5
Loss contingency payments		$ 0.4
Change in accrual	$ 2.3	$ 1.8

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	9 Months Ended
	Sep. 30, 2016segment
Segment Reporting [Abstract]
Number of operating segments	3
Number of reportable segments	3

Segment Reporting - Financial I

Segment Reporting - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 308,524	$ 356,595	$ 900,118	$ 1,002,857
Gross profit	66,318	77,121	181,922	208,364
Operating income (loss)	20,505	24,938	24,511	48,586
Interest expense	(3,825)	(3,144)	(11,081)	(9,365)
Interest income	37	25	197	229
Other	288	(359)	(1,183)	(2,360)
Total other expense	(3,500)	(3,478)	(12,067)	(11,496)
Income before taxes on income	17,005	21,460	12,444	37,090
Restructuring charges	212	172	8,544	1,034
Acquisition-related expenses	(324)	(457)	(2,059)	(780)
Restructuring Plan 2014
Segment Reporting Information [Line Items]
Restructuring charges	(400)	1,500	(500)	10,700
Restructuring Plan 2016
Segment Reporting Information [Line Items]
Restructuring charges	1,287		14,791
Schultz Mechanical Contractors, Inc.
Segment Reporting Information [Line Items]
Restructuring charges			200
Infrastructure Solutions
Segment Reporting Information [Line Items]
Revenues	158,562	149,606	434,523	421,170
Gross profit	40,566	38,428	109,485	106,074
Operating income (loss)	18,573	16,255	37,448	35,701
Acquisition-related expenses	(300)		(2,100)
Inventory step up expense			3,600
Infrastructure Solutions | Restructuring Plan 2014
Segment Reporting Information [Line Items]
Restructuring charges	(400)	1,400	(500)	7,900
Infrastructure Solutions | Restructuring Plan 2016
Segment Reporting Information [Line Items]
Operating income (loss)			3,100
Restructuring charges	(31)		3,340
Corrosion Protection
Segment Reporting Information [Line Items]
Revenues	95,084	121,392	281,939	329,157
Gross profit	18,374	27,595	52,676	70,311
Operating income (loss)	513	6,886	(7,626)	8,323
Acquisition-related expenses		(500)
Corrosion Protection | Restructuring Plan 2016
Segment Reporting Information [Line Items]
Restructuring charges	178		3,872
Energy Services
Segment Reporting Information [Line Items]
Revenues	54,878	85,597	183,656	252,530
Gross profit	7,378	11,098	19,761	31,979
Operating income (loss)	1,419	$ 1,797	(5,311)	4,562
Energy Services | Restructuring Plan 2016
Segment Reporting Information [Line Items]
Restructuring charges	$ 1,140		$ 7,579	7,600
Energy Services | Schultz Mechanical Contractors, Inc.
Segment Reporting Information [Line Items]
Acquisition-related expenses				$ (300)

Segment Reporting - Summary of

Segment Reporting - Summary of Revenues, Gross Profit and Operating Income (Loss) by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 308,524	$ 356,595	$ 900,118	$ 1,002,857
Gross profit	66,318	77,121	181,922	208,364
Operating income (loss)	20,505	24,938	24,511	48,586
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	232,734	267,001	684,088	742,976
Gross profit	51,217	56,243	138,869	148,736
Operating income (loss)	15,402	11,464	15,547	19,188
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	39,161	45,340	94,113	131,391
Gross profit	8,373	9,998	19,644	30,677
Operating income (loss)	5,410	6,258	10,208	19,700
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,850	14,905	43,771	42,668
Gross profit	2,794	4,025	8,893	12,085
Operating income (loss)	352	570	1,108	2,511
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22,779	29,349	78,146	85,822
Gross profit	3,934	6,855	14,516	16,866
Operating income (loss)	$ (659)	$ 6,646	$ (2,352)	$ 7,187

Derivative Financial Instrume62

Derivative Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Oct. 30, 2015
Debt Instrument [Line Items]
Gain upon settlement of cash flow hedges, (less than $0.1 million)	$ 100,000	$ 100,000
2015 Credit Facility
Debt Instrument [Line Items]
Amount of hedged item				$ 262,500,000
Maximum borrowing capacity				350,000,000
Recurring
Debt Instrument [Line Items]
Derivative Liability	5,751,000		$ 256,000
Recurring | Significant Observable Inputs (Level 2)
Debt Instrument [Line Items]
Derivative Liability	5,751,000		256,000
Recurring | Designated as Hedging Instrument | Significant Observable Inputs (Level 2)
Debt Instrument [Line Items]
Derivative Liability	$ 5,502,000		$ 256,000
2015 Interest Rate Swap
Debt Instrument [Line Items]
Notional Amount				$ 262,500,000
Fixed interest rate				1.46%

Derivative Financial Instrume63

Derivative Financial Instruments - Summary of the Fair Value Amounts of Derivative Instruments (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative assets	$ 0	$ 109
Derivative liabilities	5,751	256
Forward Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	109
Derivative liabilities	892	243
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative liabilities	4,859	13
Significant Observable Inputs (Level 2)
Derivatives, Fair Value [Line Items]
Derivative assets	0	109
Derivative liabilities	5,751	256
Net derivative asset (liability)	(5,751)	(147)
Significant Observable Inputs (Level 2) | Forward Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	109
Derivative liabilities	892	243
Significant Observable Inputs (Level 2) | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative liabilities	4,859	13
Designated as Hedging Instrument | Significant Observable Inputs (Level 2)
Derivatives, Fair Value [Line Items]
Derivative assets	0	18
Derivative liabilities	5,502	256
Designated as Hedging Instrument | Significant Observable Inputs (Level 2) | Forward Currency Contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	18
Designated as Hedging Instrument | Significant Observable Inputs (Level 2) | Forward Currency Contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	643	243
Designated as Hedging Instrument | Significant Observable Inputs (Level 2) | Interest Rate Swaps | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	4,859	13
Not Designated as Hedging Instrument | Significant Observable Inputs (Level 2)
Derivatives, Fair Value [Line Items]
Derivative assets	0	91
Derivative liabilities	249	0
Not Designated as Hedging Instrument | Significant Observable Inputs (Level 2) | Forward Currency Contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	91
Not Designated as Hedging Instrument | Significant Observable Inputs (Level 2) | Forward Currency Contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 249	$ 0

Derivative Financial Instrume64

Derivative Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets:
Derivative assets	$ 0	$ 109
Liabilities:
Derivative liabilities	5,751	256
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Significant Observable Inputs (Level 2)
Assets:
Derivative assets	0	109
Liabilities:
Derivative liabilities	5,751	256
Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Forward Currency Contracts
Assets:
Derivative assets	0	109
Liabilities:
Derivative liabilities	892	243
Forward Currency Contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Forward Currency Contracts | Significant Observable Inputs (Level 2)
Assets:
Derivative assets	0	109
Liabilities:
Derivative liabilities	892	243
Forward Currency Contracts | Significant Unobservable Inputs (Level 3)
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Interest Rate Swaps
Liabilities:
Derivative liabilities	4,859	13
Interest Rate Swaps | Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities:
Derivative liabilities	0	0
Interest Rate Swaps | Significant Observable Inputs (Level 2)
Liabilities:
Derivative liabilities	4,859	13
Interest Rate Swaps | Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liabilities	$ 0	$ 0

Derivative Financial Instrume65

Derivative Financial Instruments - Summary of Derivative Positions (Details) - 9 months ended Sep. 30, 2016	EUR (€)$ / €€ / £$ / £	USD ($)$ / €€ / £$ / £	GBP (£)$ / €€ / £$ / £
USD/EURO | Sell
Derivative [Line Items]
Notional Amount | €	€ 3,641,000
Weighted Average Remaining Maturity In Years	3 months
Average Exchange Rate | $ / €	1.13	1.13	1.13
USD/British Pound | Sell
Derivative [Line Items]
Notional Amount			£ 4,595,000
Weighted Average Remaining Maturity In Years	3 months
Average Exchange Rate | $ / £	1.30	1.30	1.30
EURO/British Pound | Sell
Derivative [Line Items]
Notional Amount			£ 8,000,000
Weighted Average Remaining Maturity In Years	3 months
Average Exchange Rate | € / £	0.87	0.87	0.87
Interest Rate Swaps
Derivative [Line Items]
Notional Amount | $		$ 249,375,000
Weighted Average Remaining Maturity In Years	4 years 1 month

Uncategorized Items - aegn-2016

Label	Element	Value
Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations	us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations	$ 211,696,000