Aegion 10-Q 7 Nov 14 2014 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
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	'	37,381,538
Amendment Flag	'false	'
Entity Central Index Key	'0000353020	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Well-known Seasoned Issuer	'Yes	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues	$350,138	$307,665	$979,240	$775,741
Cost of revenues	286,199	238,254	782,320	599,625
Gross profit	63,939	69,411	196,920	176,116
Operating expenses	66,977	47,956	169,666	130,112
Acquisition-related expenses	0	2,267	539	4,175
Operating income	-13,934	22,032	15,819	44,673
Other income (expense):	'	'	'	'
Interest expense	-3,258	-5,454	-9,693	-10,033
Interest income	102	40	479	158
Other	-367	-522	-1,830	6,561
Total other income (expense)	-3,523	-5,936	-11,044	-3,314
Income before taxes on income	-17,457	16,096	4,775	41,359
Taxes on income	-1,356	3,164	4,217	7,985
Income before equity in earnings of affiliated companies	-16,101	12,932	558	33,374
Equity in earnings of affiliated companies	0	1,691	677	3,903
Income from continuing operations	-16,101	14,623	1,235	37,277
Loss from discontinued operations	-130	-558	-626	-6,456
Net income	-16,231	14,065	609	30,821
Non-controlling interests	-823	-127	-880	-959
Net income attributable to Aegion Corporation	-17,054	13,938	'	29,862
Basic:	'	'	'	'
Income from continuing operations (in Dollars per share)	($0.45)	$0.37	$0.01	$0.94
Loss from discontinued operations (in Dollars per share)	$0	($0.01)	($0.02)	($0.17)
Net income (in Dollars per share)	($0.45)	$0.36	($0.01)	$0.77
Diluted:	'	'	'	'
Income from continuing operations (in Dollars per share)	($0.45)	$0.37	$0.01	$0.93
Loss from discontinued operations (in Dollars per share)	$0	($0.01)	($0.02)	($0.17)
Net income (in Dollars per share)	($0.45)	$0.36	($0.01)	$0.76
Definite-lived intangible asset impairment	10,896	0	10,896	0
Earnout reversal	$0	($2,844)	$0	($2,844)

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	($16,231)	$14,065	$609	$30,821
Other comprehensive income:	'	'	'	'
Currency translation adjustments	-16,693	-1,093	-17,473	-11,447
Pension activity, net of tax	-8	8	-3	16
Deferred gain on hedging activity, net of tax	453	-484	641	-333
Total comprehensive income (loss)	-32,479	12,496	-16,226	19,057
Comprehensive income attributable to non-controlling interests	-285	-290	-308	-840
Comprehensive income (loss) attributable to Aegion Corporation	($32,764)	$12,206	($16,534)	$18,217

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Deferred gain on hedging activity, tax	$51	$48	$124	$100

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$115,941	$158,045
Restricted cash	623	483
Receivables, net of allowances of $9,822 and $3,441, respectively	266,883	231,775
Retainage	35,923	30,831
Costs and estimated earnings in excess of billings	105,170	79,999
Inventories	59,225	58,768
Prepaid expenses and other current assets	41,459	38,522
Current assets of discontinued operations	4,789	5,435
Total current assets	630,013	603,858
Property, plant & equipment, less accumulated depreciation	169,873	182,303
Other assets	'	'
Goodwill	347,236	348,680
Identified intangible assets, less accumulated amortization	189,974	209,283
Investments	0	9,101
Deferred income tax assets	2,627	6,957
Other assets	13,276	14,315
Total other assets	553,113	588,336
Non-current assets of discontinued operations	2,191	2,921
Total Assets	1,355,190	1,377,418
Current liabilities	'	'
Accounts payable	93,548	80,417
Accrued expenses	111,785	105,466
Billings in excess of costs and estimated earnings	30,355	24,978
Current maturities of long-term debt and line of credit	26,399	22,024
Current liabilities of discontinued operations	1,721	2,070
Total current liabilities	263,808	234,955
Long-term debt, less current maturities	357,802	366,616
Deferred income tax liabilities	29,629	38,217
Other non-current liabilities	12,299	10,512
Non-current liabilities of discontinued operations	224	197
Total liabilities	663,762	650,497
Commitments and Contingencies – Note 8	'	'
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 37,374,331 and 37,983,114 respectively	374	380
Additional paid-in capital	216,575	236,128
Retained earnings	470,537	470,808
Accumulated other comprehensive income (loss)	-14,211	2,052
Total stockholders’ equity	673,275	709,368
Non-controlling interests	18,153	17,553
Total equity	691,428	726,921
Total Liabilities and Equity	$1,355,190	$1,377,418

Consolidated_Balance_Sheets_Un1

Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts receivable	$2,829	$3,441
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)	37,631,630	37,983,114
Common stock, shares outstanding (in Shares)	37,631,630	37,983,114

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (Unaudited) (USD $)

Total

Common Stock [Member]

Additional Paid-in Capital [Member]

Retained Earnings [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Noncontrolling Interest [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

In Thousands, except Share data, unless otherwise specified

Common Stock [Member]

Additional Paid-in Capital [Member]

Retained Earnings [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Noncontrolling Interest [Member]

Common Stock [Member]

Additional Paid-in Capital [Member]

Retained Earnings [Member]

Accumulated Other Comprehensive Income (Loss) [Member]

Noncontrolling Interest [Member]

Balance at Dec. 31, 2012

$716,120

$390

$257,209

$426,457

$15,260

$16,804

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Dec. 31, 2012

'

38,952,561

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

30,821

0

0

29,862

0

959

'

'

'

'

'

'

'

'

'

'

'

'

Net Income (Loss) Attributable to Parent

29,862

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

'

29,511

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, Stock Options Exercised

899

0

899

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Restricted shares issued

'

'

'

'

'

'

4

4

0

0

0

0

0

0

0

0

0

0

Restricted shares issued (in Shares)

'

'

'

'

'

'

'

431,877

'

'

'

'

'

11,112

'

'

'

'

Issuance of shares pursuant to deferred stock unit awards (in Shares)

'

5,313

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeitures of restricted shares

0

0

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Forfeitures of restricted shares (in Shares)

'

-20,704

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired

19,017

-8

-19,009

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired (in Shares)

'

-833,552

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation expense

5,090

0

5,090

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Currency translation adjustment and derivative transactions, net

-11,764

0

0

0

-11,645

-119

'

'

'

'

'

'

'

'

'

'

'

'

Balance at Sep. 30, 2013

722,153

386

244,189

456,319

3,615

17,644

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Sep. 30, 2013

'

38,576,118

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balance at Dec. 31, 2013

726,921

380

236,128

470,808

2,052

17,553

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Dec. 31, 2013

37,983,114

37,983,114

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

609

0

0

'

0

880

'

'

'

'

'

'

'

'

'

'

'

'

Net Income (Loss) Attributable to Parent

'

'

'

-271

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period

526,359

526,359

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, Stock Options Exercised

8,211

5

8,206

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Restricted shares issued

'

'

'

'

'

'

2

2

0

0

0

0

0

0

0

0

0

0

Restricted shares issued (in Shares)

'

'

'

'

'

'

'

226,483

'

'

'

'

'

15,277

'

'

'

'

Issuance of shares pursuant to deferred stock unit awards (in Shares)

'

31,794

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeitures of restricted shares

-1

-1

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Forfeitures of restricted shares (in Shares)

'

-75,006

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired

31,063

-12

-31,051

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired (in Shares)

'

-1,333,690

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation expense

4,201

0

4,201

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests

-617

0

-909

0

0

292

'

'

'

'

'

'

'

'

'

'

'

'

Currency translation adjustment and derivative transactions, net

-16,835

0

0

0

-16,263

-572

'

'

'

'

'

'

'

'

'

'

'

'

Balance at Sep. 30, 2014

$691,428

$374

$216,575

$470,537

($14,211)

$18,153

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Sep. 30, 2014

37,631,630

37,374,331

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
	USD ($)	USD ($)	Brinderson LP [Member]	Brinderson LP [Member]
			USD ($)	USD ($)
Proceeds from long-term debt	$0	$385,500	'	'
Cash flows from operating activities:	'	'	'	'
Net income	609	30,821	'	'
Loss from discontinued operations	626	6,456	'	'
Income from continuing operations	1,235	37,277	'	'
Adjustments to reconcile to net cash provided by operating activities:	'	'	'	'
Depreciation and amortization	32,984	29,126	'	'
Gain on sale of fixed assets	-65	-815	'	'
Equity-based compensation expense	4,201	5,090	'	'
Deferred income taxes	-3,797	-1,523	'	'
Equity in earnings of affiliated companies	-677	-3,903	'	'
Non-cash restructuring charges	17,187	0	'	'
Fixed asset impairment	11,870	0	'	'
Definite-lived intangible asset impairment	10,896	0	'	'
Gain on sale of interests in German joint venture	0	-11,771	'	'
Loss on sale of interests in Bayou Coating, L.L.C.	472	0	'	'
Loss on foreign currency transactions	149	1,700	'	'
Other	881	-159	'	'
Changes in operating assets and liabilities (net of acquisitions):	'	'	'	'
Restricted cash	-142	-142	'	'
Return on equity of affiliated companies	684	4,027	'	'
Receivables net, retainage and costs and estimated earnings in excess of billings	-83,383	-11,144	'	'
Inventories	-4,732	-3,416	'	'
Prepaid expenses and other assets	-5,009	-5,044	'	'
Accounts payable and accrued expenses	25,511	2,932	'	'
Other operating	430	198	'	'
Net cash provided by operating activities of continuing operations	8,695	41,553	'	'
Net cash used in operating activities of discontinued operations	-90	-10,179	'	'
Net cash provided by operating activities	8,605	31,374	'	'
Cash flows from investing activities:	'	'	'	'
Capital expenditures	-25,118	-20,079	'	'
Proceeds from sale of fixed assets	1,140	1,856	'	'
Patent expenditures	-1,988	-469	'	'
Proceeds from sale of interests in Bayou Coating, L.L.C.	9,065	0	'	'
Total consideration recorded	0	18,300	-147,605	'
Purchase of Brinderson, net of cash acquired	'	'	0	143,763
Net cash used in investing activities of continuing operations	-16,901	-144,155	'	'
Net cash provided by investing activities of discontinued operations	90	774	'	'
Net cash used in investing activities	-16,811	-143,381	'	'
Cash flows from financing activities:	'	'	'	'
Proceeds from issuance of common stock upon stock option exercises, including tax effects	8,615	903	'	'
Repurchase of common stock	-31,051	-19,017	'	'
Purchase of non-controlling interest	-617	0	'	'
Business Combination, Contingent Consideration, Amounts Paid	0	2,112	'	'
Payments of Financing Costs	0	5,013	'	'
Proceeds on notes payable	1,284	1,541	'	'
Principal payments on long-term debt	-15,477	-249,125	'	'
Net cash provided by (used in) financing activities	-27,246	112,677	'	'
Effect of exchange rate changes on cash	-6,652	-7,659	'	'
Net decrease in cash and cash equivalents for the period	-42,104	-6,989	'	'
Cash and cash equivalents, beginning of period	158,045	133,676	'	'
Cash and cash equivalents, end of period	115,941	126,687	'	'
Debt Issuance Cost	$0	$1,964	'	'

Note_1_General

Note 1 - General	9 Months Ended
	Sep. 30, 2014
Description of Business [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 presentation of the Company’s financial position as of September 30, 2014 and the results of operations and statements of comprehensive income for the quarters and nine-month periods ended September 30, 2014 and 2013 and the statements of equity and cash flows for the nine-month periods ended September 30, 2014 and 2013. The unaudited consolidated financial statements 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 2013 Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 28, 2014.
	The results of operations for the quarter and nine-month period ended September 30, 2014 are not necessarily indicative of the results to be expected for the full year.
	Acquisitions/Strategic Initiatives/Divestitures
	Energy and Mining Segment
	On October 6, 2014, the Company’s board of directors approved a realignment and restructuring plan (“2014 Restructuring Plan”) as discussed further in Notes 2 and 12. As part of the 2014 Restructuring Plan, the Company made the decision to shutter two older and redundant fusion bonded epoxy coating plants and terminate certain land leases at The Bayou Companies, LLC’s (“Bayou”) Louisiana facility. The actions taken to restructure Bayou’s Louisiana operations allow Bayou to cost effectively meet market demand, for both onshore and offshore projects, by optimizing pipe coating activities and reducing fixed costs. The repositioning of Bayou’s Louisiana facility will also include additional capital investments in the remaining coating facilities over the next two to three years to augment Bayou’s competitive position.
	On March 31, 2014, the Company sold its forty-nine percent (49%) interest in Bayou Coating, L.L.C. (“Bayou Coating”) to Stupp Brothers Inc. (“Stupp”), the holder of the remaining fifty-one percent (51%) interest in Bayou Coating. Stupp purchased the interest by exercising an existing option to acquire the Company’s interest in Bayou Coating at a purchase price equal to $9.1 million, which represented forty-nine percent (49%) of the book value of Bayou Coating as of December 31, 2013. Such book value was determined on the basis of Bayou Coating’s federal information tax return for 2013 and approximated the Company’s book value of its investment in Bayou Coating as of December 31, 2013. The Company had previously received an indication from Stupp of its intent to exercise such option and, in the second quarter of 2013 in connection with such indication, the Company recognized a non-cash charge of $2.7 million ($1.8 million post-tax) related to the goodwill allocated to the joint venture as part of the purchase price accounting associated with the 2009 acquisition of Bayou. The non-cash charge represented the Company’s then current estimate of the difference between the carrying value of the investment on the balance sheet and the amount the Company would receive in connection with the exercise. During the first quarter of 2014, the difference between the Company’s recorded gross equity in earnings of affiliated companies of approximately $1.2 million and the final equity distribution settlement of $0.7 million resulted in a loss of approximately $0.5 million that is recorded in other income (expense) on the consolidated statement of operations.
	Prior to March 2014, the Company held a fifty-nine (59%) equity interest in Delta Double Jointing, LLC (“Bayou Delta”) through which the Company offers pipe jointing and other services for the steel-coated pipe industry. The remaining forty-one percent (41%) was held by Bayou Coating. On March 31, 2014, the Company acquired this forty-one percent (41%) interest from Bayou Coating by exercising its existing option at a purchase price equal to $0.6 million. As a result, Bayou Delta is now a wholly owned subsidiary of the Company.
	On July 1, 2013, the Company acquired the equity interests of Brinderson, L.P., a California limited partnership, General Energy Services, a California corporation, and Brinderson Constructors, Inc., a California corporation (collectively, “Brinderson”). Brinderson is a leading integrated service provider of maintenance, construction, engineering and turnaround activities for the upstream and downstream oil and gas markets. The transaction purchase price was $150.0 million, which resulted in a cash purchase price at closing of $147.6 million after working capital adjustments and an adjustment to account for cash held in the business at closing. The cash purchase price was funded by borrowings under the Company’s $650.0 million senior secured credit facility as discussed in Note 5.
	During the second quarter of 2013, the Company’s board of directors approved a plan of liquidation for its Bayou Welding Works (“BWW”) business in an effort to improve the Company’s overall financial performance and align the operations with its long-term strategic objectives. BWW provided specialty welding and fabrication services from its facility in New Iberia, Louisiana. Financial results for BWW were part of the Company’s Energy and Mining segment for financial reporting purposes. BWW ceased bidding new work and substantially completed all ongoing projects during the second quarter of 2013. As a result of the closure of BWW, Aegion recognized a pre-tax, non-cash charge of approximately $3.9 million ($2.4 million after-tax, or $0.06 per diluted share) to reflect the impairment of goodwill and intangible assets. The Company also recognized additional non-cash impairment charges for equipment and other assets of approximately $1.1 million on a pre-tax basis ($0.7 million on an after-tax basis, or $0.02 per diluted share), which also was recorded in the second quarter of 2013. The Company expects the cash liquidation value to approximate net asset value. Net asset value is determined using recorded amounts for assets and liabilities, which are based on Level 3 inputs as defined in Note 11. The Company also incurred cash charges to exit the business of approximately $0.1 million on a pre-tax and post-tax basis, which included property, equipment and vehicle lease termination and buyout costs, employee termination benefits and retention incentives, among other ancillary shut-down expenses. Final liquidation of BWW’s assets is expected to occur by the end of 2014.
	Water and Wastewater Segment
	On October 6, 2014, the Company’s board of directors approved the 2014 Restructuring Plan, which included the decision to exit Insituform’s contracting markets in France, Switzerland, India, Hong Kong, Malaysia and Singapore. This decision was made taking into account market size, bid table consistency, supportive governmental bid process, length of cash collection cycles and operating results in each country. Activities with respect to Insituform’s contracting operations in France, Switzerland, India, Hong Kong, Malaysia and Singapore are expected to be concluded by the end of the third quarter of 2015 as Insituform completes existing backlog in the affected countries. See further discussion in Notes 2 and 12.
	In June 2013, the Company sold its fifty percent (50%) interest in Insituform Rohrsanierungstechniken GmbH (“Insituform-Germany”) to Per Aarsleff A/S, a Danish company (“Aarsleff”). Insituform-Germany, a company that was jointly owned by Aegion and Aarsleff, is active in the business of no-dig pipe rehabilitation in Germany, Slovakia and Hungary. The sale price was €14.0 million, approximately $18.3 million. The sale resulted in a gain on sale of approximately $11.3 million (net of $0.5 million of transaction expenses). In connection with the sale, Insituform-Germany also entered into a tube supply agreement with the Company whereby Insituform-Germany will purchase on an annual basis at least GBP 2.3 million, approximately $3.6 million, of felt cured-in-place pipe (“CIPP”) liners during the two-year period from June 26, 2013 to June 30, 2015.
	Purchase Price Accounting
	The Company accounts for its acquisitions in accordance with FASB ASC 805, Business Combinations. The Company records definite-lived intangible assets at their determined fair value related to customer relationships, backlog, trade names and trademarks and patents and other acquired technologies. Acquisitions generally result in goodwill related to, among other things, purchase price, growth opportunities and market potential. The goodwill associated with the Brinderson acquisition is deductible for tax purposes. At September 30, 2014, the Company had substantially completed its accounting for Brinderson with the exception of final working capital adjustments. During the second quarter of 2014, certain pre-acquisition matters were identified by the Company where a loss is both probable and reasonably estimable. Accordingly, the Company increased recorded goodwill by $14.5 million and adjusted its purchase price accounting retroactively to the measurement period, July 1, 2013. The Company has provided claim notices related to these uncertainties; however, no escrow receivable was recorded as of September 30, 2014. To the extent the Company receives notification or cash in future periods, these adjustments would be recorded through purchase accounting consistent with FASB ASC 805, Business Combinations. As the Company completes its final accounting for this acquisition, future adjustments related to working capital, escrow and related contingencies could occur.
	The Brinderson acquisition made the following contributions to the Company’s revenues and profits (in thousands):
		Quarter Ended			Nine Months Ended
		30-Sep-14			30-Sep-14
	Revenues	$	77,353		$	225,940
	Net income	3,503			8,430
	The following unaudited pro forma summary presents combined information of the Company as if the Brinderson acquisition had occurred at the beginning of the year preceding its acquisition (in thousands):
		Nine Months Ended
		30-Sep-13
	Revenues	$	885,842
	Net income (1)	40,889
	_____________________
	(1)	Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded at the beginning of the year preceding the acquisition date.
	The transaction purchase price to acquire Brinderson was $150.0 million, which resulted in a cash purchase price at closing of $147.6 million after preliminary working capital adjustments and an adjustment to account for cash held in the business at closing.
	The following table summarizes the fair value of identified assets and liabilities of the Brinderson acquisition at its acquisition date (in thousands):
	Cash	$	3,842
	Receivables and cost and estimated earnings in excess of billings	28,353
	Prepaid expenses and other current assets	655
	Property, plant and equipment	6,848
	Identified intangible assets	60,210
	Other assets	1,071
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	(30,622		)
	Total identifiable net assets	$	70,357
	Total consideration recorded	$	147,605
	Less: total identifiable net assets	70,357
	Goodwill at September 30, 2014	$	77,248
	During the second quarter of 2014, and in connection with the 2012 acquisition of Fyfe Group LLC’s Asian operations (“Fyfe Asia”), the Company agreed to a working capital settlement with the previous owners, which increased the purchase price and related goodwill by $1.1 million.

Note_2_Accounting_Policies

Note 2 - Accounting Policies	9 Months Ended
	Sep. 30, 2014
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 Brinderson are derived mainly from multiple maintenance contracts under multi-year, long-term Master Service Agreements and alliance contracts, as well as, engineering and construction-type contracts. Brinderson enters into contracts with its customers 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. Brinderson also performs 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
	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. Net foreign exchange transaction gains (losses) are included in other income (expense) in the Consolidated Statements of Operations. Due to the strengthening of the U.S. Dollar, there was a substantial decrease with respect to certain functional currencies and their relation to the U.S. Dollar during the third quarter of 2014, most notably the Canadian Dollar, British Pound and Euro.
	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, 2014 and 2013, the Company had accumulated income (loss) of $(13.9) million and $2.1 million, respectively, related to currency translation adjustments, $(0.1) million and $1.3 million, respectively, related to derivative transactions and $(0.2) million and $0.2 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 7 for additional information regarding taxes on income.
	Long-Lived Assets
	Property, plant and equipment and other identified intangibles (primarily customer relationships, patents and acquired technologies, trademarks, licenses, contract backlog and non-compete agreements) are recorded at cost 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.
	On October 6, 2014, the Company’s board of directors approved the 2014 Restructuring Plan as discussed further in Note 12. As part of the 2014 Restructuring Plan, the Company evaluated the long-lived assets of its global operations affected by the restructuring initiative. In the early stages of the evaluation process, the Company reviewed the financial performance of all at risk asset groups within each affected reporting unit. Due to the ongoing weak economic conditions and weak economic outlook for certain at risk asset groups, the Company decided to no longer focus on the possible growth opportunities within these businesses; therefore, the Company would no longer provide cash flow or operational support to these businesses. This decision was deemed a significant adverse change in the extent or manner in which the asset is currently being used, and as such, the Company performed an asset impairment review as of September 30, 2014 for all of its at risk asset groups within each of the affected reporting units in accordance with ASC 360 Property, Plant and Equipment (“FASB ASC 360”).
	The affected asset groups include: (i) the Bayou and Bayou Delta asset groups within the Bayou reporting unit (“Bayou Reporting Unit”); (ii) the France and Switzerland asset groups within the European Sewer and Water Rehabilitation (“Europe”) reporting unit; and (iii) the Singapore, Hong Kong, Malaysia and India asset groups within the Asia-Pacific Sewer and Water Rehabilitation (“Asia-Pacific”) reporting unit. The results of the Bayou Reporting Unit and its related asset groups are reported within the Energy and Mining reportable segment. The results of Europe and Asia-Pacific and their related asset groups are reported within the Water and Wastewater reportable segment.
	The assets of each asset group represent the lowest level for which identifiable cash flows can be determined independent of other groups of assets and liabilities. The Company developed internal forward business plans under the guidance of local and regional leadership to determine the undiscounted expected future cash flows derived from each of the at risk asset groups’ long-lived assets. Such were based on management’s best estimates considering the likelihood of various outcomes. Based on the internal projections, the Company determined that the undiscounted expected future cash flows for all of the at risk asset groups referenced above were less than the carrying value of the assets, and as a result, engaged a third-party valuation firm to assist in determining the fair value of long-lived assets at these at risk asset groups.
	In order to determine the impairment amount of long-lived assets, the Company first determined the fair value of each key component of its long-lived assets at each asset group. For property and equipment, the Company primarily utilized the cost and market approaches, which involved the use of significant estimates and assumptions such as salvage and scrap market data and producer price indices. The Company also considered functional and economic obsolescence related to the business and the assets. Based upon the results of the analysis, the at risk asset groups with a fair value less than the carrying value of their respective assets included Bayou, Bayou Delta, France, Malaysia and India. Accordingly, the Company recorded a total impairment charge of $11.9 million in the quarter and nine months ended September 30, 2014, which consisted of $10.9 million related to Bayou, $0.4 million related to Bayou Delta, $0.2 million related to France, $0.3 million related to Malaysia and $0.1 million related to India. The impairment charge was primarily recorded to cost of revenues in the Consolidated Statements of Operations.
	Included within the impairment assessment were Bayou-related intangible assets such as tradenames and customer relationships that were also tested on an undiscounted cash flow basis. For customer relationships, the undiscounted expected future cash flows were less than the carrying value; thus, the Company engaged a third-party valuation firm to assist in determining the fair value of customer relationships recorded at Bayou. In order to determine the impairment amount of the customer relationships intangible asset, the Company calculated the fair value of the intangible based on the multi-period excess earnings method, which utilizes discounted cash flows to evaluate the net earnings attributable to the asset being measured. Key assumptions used in assessment include the discount rate (based on weighted-average cost of capital), revenue growth rates, contributory asset charges and working capital needs, which were based on current market conditions and were consistent with internal management projections.
	Based on the results of the valuation, the carrying amount of the customer relationship intangible asset at Bayou exceeded the fair value and resulted in a full impairment as of September 30, 2014. Accordingly, the Company recorded a $10.9 million impairment charge for the quarter and nine months ended September 30, 2014. The impairment charge was recorded to definite-lived intangible asset impairment in the Consolidated Statements of Operations.
	The fair value estimates described above were determined using observable inputs and significant unobservable inputs, which are based on level 3 inputs as defined in Note 11.
	Goodwill
	Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. Under FASB ASC 350, Intangibles – Goodwill and Other (“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. The annual assessment was last completed as of October 1, 2013. See Note 4 for additional information regarding goodwill by operating segment. Factors that could potentially trigger an interim impairment review include (but are not limited to):
	•	significant underperformance of a reporting unit relative to expected, historical or forecasted future operating results;
	•	significant negative industry or economic trends;
	•	significant changes in the strategy for a reporting unit including extended slowdowns in a segment’s market;
	•	a decrease in the Company’s market capitalization below its book value; and
	•	a significant change in regulations.
	As a result of the 2014 Restructuring Plan, the Company evaluated the goodwill of its global operations affected by the restructuring initiative and determined that a triggering event had occurred. As such, the Company performed a goodwill impairment review for each affected reporting unit as of September 30, 2014. The Company’s reporting units adversely affected by the 2014 Restructuring Plan were Bayou, Europe and Asia-Pacific. In accordance with the provisions of FASB ASC 350, the Company determined the fair value of its reporting units and compared such fair value to the carrying value of those reporting units. For all three reporting units, fair value exceeded carrying value.
	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. Management believes this approach is appropriate because it provides a fair value estimate using multiples from entities with operations and economic characteristics comparable to the Company’s 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. Management 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. Management determines the appropriate discount rate for each of the Company’s 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 were adjusted, as appropriate, to account for company-specific risks associated with each reporting unit.
	Other significant assumptions used in the Company’s goodwill review included: (i) annual revenue growth rates generally ranging from 2% to 7%; (ii) sustained or slightly increased gross margins; (iii) peer group EBITDA multiples; and (iv) terminal values for each reporting unit using a long-term growth rate of 2.5% to 3.0%. If actual results differ from estimates used in these calculations, we could incur future impairment charges.
	For the Bayou Reporting Unit, the excess of fair value in relation to its carrying value was 10.2%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis; however, the fair value in relation to its carrying value improved from the prior year due to a decrease in carrying value as of the valuation dates. During the first nine months of 2014, the carrying value at the Bayou Reporting Unit was lowered due to the sale of its interest in Bayou Coating as described in Note 1 and the impairment of tangible and intangibles assets described above. The fair value for the Bayou Reporting Unit decreased $48.0 million, or 30.9%, from the prior year analysis due to the suspension of a material contract, a lack of project activity available in the Gulf of Mexico market and customer-driven project delays. The impairment analysis assumed a weighted average cost of capital of 13.5% and a long-term growth rate of 3%. The analysis also included an annual revenue growth rate of approximately 5%; modestly higher than the prior year actual results, but at a level that is below our five-year average. Projected cash flows anticipate a modest recovery in the Gulf of Mexico market beginning in 2015. The Company noted improved visibility into larger bidding opportunities for deep water drilling activities in the Gulf of Mexico; however, there is a significant lead time from drilling to the point of building the pipeline infrastructure, or gather lines, to bring oil and natural gas onshore for refinement. This extended lead time creates added uncertainty and could have a material negative impact on long-term projected cash flows. Additionally, projected cash flows related to the Bayou Reporting Unit’s new insulation facility located in Louisiana are subject to final operational testing and largely dependent, in 2015 and 2016, on a single, large customer with a long-standing history with the Company. The Bayou Reporting Unit’s Canadian coating operation, while not as reliant on larger projects, is dependent upon overall increased project activity in order to realize the cash flow projections included in the impairment analysis. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	For Europe, the excess of fair value in relation to its carrying value was 9.3%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis, and the fair value in relation to its carrying value declined from the prior year due to exiting certain European operations. The fair value for Europe decreased $8.2 million, or 9.5%, from the prior year analysis. The impairment analysis assumed a weighted average cost of capital of 14.0% and a long-term growth rate of 2.5%. The analysis also included an annual revenue growth rate of approximately 5%; slightly below the prior year results, and certain cost savings expected to be achieved through the 2014 Restructuring Plan. In addition, projected cash flows were also based, in part, on the successful closure of the Insituform contacting operations in France and Switzerland. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	For Asia-Pacific, the excess of fair value in relation to its carrying value was 12.1%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis, and the fair value in relation to its carrying value declined from the prior year due to exiting certain Asia-Pacific operations, many of which, however, were underperforming. The fair value for Asia-Pacific decreased $18.0 million, or 36.4%, from the prior year analysis. The impairment analysis assumed a weighted average cost of capital of 14.0% and a long-term growth rate of 3.0%. The analysis also included an annual revenue growth rate of approximately 5% for the remaining operations and certain cost savings expected to be achieved through the 2014 Restructuring Plan. In addition, projected cash flows were also based, in part, on the successful closure of the Insituform contracting operations in India, Hong Kong, Malaysia and Singapore. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	The total value of goodwill recorded at September 30, 2014 for the Bayou, Europe and Asia-Pacific reporting units was $29.7 million, $20.4 million and $5.3 million, respectively. The Company will perform its annual goodwill assessment for all of its reporting units as of October 1, 2014.
	Investments in Affiliated Companies
	On March 31, 2014, the Company sold its forty-nine percent (49%) interest in Bayou Coating to Stupp, the holder of the remaining fifty-one percent (51%) interest in Bayou Coating. Stupp purchased the interest by exercising an existing option to acquire the Company’s interest in Bayou Coating at a purchase price equal to $9.1 million. The Company had previously received an indication from Stupp of its intent to exercise such option and, in the second quarter of 2013 in connection with such indication, the Company recognized a non-cash charge of $2.7 million ($1.8 million post-tax) related to the goodwill allocated to the joint venture as part of the purchase price accounting associated with the 2009 acquisition of Bayou. The non-cash charge represented the Company’s then current estimate of the difference between the carrying value of the investment on the balance sheet and the amount the Company would receive in connection with the exercise. During the first quarter of 2014, the difference between the Company’s recorded gross equity in earnings of affiliated companies of approximately $1.2 million and the final equity distribution settlement of $0.7 million resulted in a loss of approximately $0.5 million that is recorded in other income (expense) on the consolidated statement of operations.
	Prior to March 2014, the Company held a fifty-nine (59%) equity interest in Bayou Delta through which the Company offers pipe jointing and other services for the steel-coated pipe industry. The remaining forty-one percent (41%) was held by Bayou Coating. On March 31, 2014, the Company acquired this forty-one percent (41%) interest from Bayou Coating by exercising its existing option at a purchase price equal to $0.6 million. As a result, Bayou Delta is now a wholly owned subsidiary of the Company.
	In June 2013, the Company sold its fifty percent (50%) interest in Insituform-Germany to Aarsleff. Insituform-Germany, a company that was jointly owned by Aegion and Aarsleff, is active in the business of no-dig pipe rehabilitation in Germany, Slovakia and Hungary. The sale price was €14.0 million, approximately $18.3 million. The sale resulted in a gain on the sale of approximately $11.3 million (net of $0.5 million of transaction expenses). In connection with the sale, Insituform-Germany also entered into a tube supply agreement with the Company whereby Insituform-Germany will purchase on an annual basis at least GBP 2.3 million, approximately $3.6 million, of felt cured-in-place pipe (“CIPP”) liners during the two-year period from June 26, 2013 to June 30, 2015.
	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, are accounted for by the equity method. At December 31, 2013, the investment in affiliated companies on the Company’s consolidated balance sheets was $9.1 million. Due to the sale of Bayou Coating, the balance was zero at September 30, 2014.
	Net income presented below for the quarters ended September 30, 2014 and 2013 includes Bayou Coating’s previously held forty-one percent (41%) interest in Bayou Delta, which is eliminated for purposes of determining the Company’s equity in earnings of affiliated companies because Bayou Delta is consolidated in the Company’s financial statements as a result of its additional ownership through another Company subsidiary.
	The Company’s equity in earnings of affiliated companies for all periods presented below includes acquisition-related depreciation and amortization expense and is net of income taxes associated with these earnings. Financial data for these investments in affiliated companies for each of the nine month periods ended September 30, 2014 and 2013 is summarized in the following table (in thousands):
		Nine Months Ended September 30,
	Income statement data	2014		2013 (1)
	Revenue	$	9,088	$	75,986
	Gross profit	3,489		21,753
	Net income	2,413		13,624
	Equity in earnings of affiliated companies	677		3,903
	_____________________
	(1)    Includes the financial data of Insituform-Germany through its sale in June 2013.
	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, 2014, 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,		December 31,
	2014		2013
Current assets	$	58,646	$	55,960
Non-current assets	44,769		47,606
Current liabilities	25,697		27,335
Non-current liabilities	37,215		36,761
	Nine Months Ended September 30,
Income statement data	2014		2013
Revenue	$	58,942	$	62,650
Gross profit	9,370		10,179
Net income	714		2,040
Newly Issued Accounting Pronouncements
In April 2014, the FASB issued guidance that changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. Under the new guidance, a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results and is disposed of or classified as held for sale. The standard also introduces several new disclosures. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date and is effective for annual and interim periods beginning after December 15, 2014, with earlier adoption permitted. The Company does not expect that the adoption of this standard will have a material effect on its 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 nonfinancial 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, 2016. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations.

Note_3_Share_Information

Note 3 - Share Information	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Share Information	'
	SHARE INFORMATION
	Earnings per share have been calculated using the following share information:
		Quarters Ended		Nine Months Ended
		September 30,		September 30,
		2014	2013	2014	2013
	Weighted average number of common shares used for basic EPS	37,406,061	38,672,441	37,752,472	38,836,276
	Effect of dilutive stock options and restricted and deferred stock unit awards	—	398,932	360,317	392,349
	Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	37,406,061	39,071,373	38,112,789	39,228,625
	The Company excluded 312,091 stock options and restricted and deferred stock units for the quarter ended September 30, 2014 from the diluted earnings per share calculation for the Company’s common stock because of the reported net loss for the period. Additionally, the Company excluded 200,665 and 159,639 stock options for the quarters ended September 30, 2014 and 2013, respectively, and 200,665 and 159,639 stock options for the nine-month periods ended September 30, 2014 and 2013, 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.

Note_4_Goodwill_and_Intangible

Note 4 - Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Identified Intangible Assets	'
	GOODWILL AND IDENTIFIED INTANGIBLE ASSETS
	Goodwill and identified intangible assets consist of the following:
	Goodwill
	(In thousands)
		Energy and				Water and				Commercial				Total
		Mining				Wastewater				and Structural
	Beginning balance at January 1, 2014	$	153,110			$	130,078			$	65,492			$	348,680
	Additions to goodwill through acquisitions (1)	—				—				1,098				1,098
	Foreign currency translation	(609		)		(1,845		)		(88		)		(2,542		)
	Balance at September 30, 2014	$	152,501			$	128,233			$	66,502			$	347,236
	__________________________
	(1)	During the second quarter of 2014, the Company recorded goodwill of $1.1 million related to the 2012 acquisition of Fyfe Asia (see Note 1).
	Identified Intangible Assets
	(In thousands)			30-Sep-14												31-Dec-13
		Weighted		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
		Average
		Useful
		Lives
		(Years)
	License agreements	6		$	3,912			$	(3,094	)		$	818			$	3,917	$	(2,977	)	$	940
	Backlog	0		4,736				(4,736		)		—				4,745		(4,745		)	—
	Leases	12		2,067				(588		)		1,479				2,067		(477		)	1,590
	Trademarks	16		21,648				(4,941		)		16,707				21,394		(4,167		)	17,227
	Non-competes	4		1,140				(817		)		323				1,140		(753		)	387
	Customer relationships (1)	14		147,704				(12,517		)		135,187				182,703		(28,287		)	154,416
	Patents and acquired technology	16		59,152				(23,692		)		35,460				57,419		(22,696		)	34,723
				$	240,359			$	(50,385	)		$	189,974			$	273,385	$	(64,102	)	$	209,283
	__________________________
	(1)	During the third quarter of 2014, the Company recorded an intangible asset impairment of $10.9 million related to realignment efforts at Bayou (see Note 2).
	Amortization expense was $3.6 million and $3.7 million for the quarters ended September 30, 2014 and 2013, respectively, and $10.6 million and $8.8 million for the nine-month periods ended September 30, 2014 and 2013, respectively. Estimated amortization expense by year is as follows (in thousands):
	2014		$	14,224
	2015		13,509
	2016		13,516
	2017		13,469
	2018		13,391

Note_5_LongTerm_Debt_and_Credi

Note 5 - Long-Term Debt and Credit Facility	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt and Credit Facility	'
	LONG-TERM DEBT AND CREDIT FACILITY
	Financing Arrangements
	In July 2013, in connection with the Brinderson acquisition, the Company entered into a $650.0 million senior secured credit facility (the “Credit Facility”) with a syndicate of banks. Bank of America, N.A. served as the administrative agent. 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, each with a maturity date of July 1, 2018. The Company borrowed the entire term loan and drew $35.5 million against the revolving line of credit from the Credit Facility on July 1, 2013 for the following purposes: (1) to pay the $147.6 million cash purchase price for the Company’s acquisition of Brinderson, L.P. and related entities, which closed on July 1, 2013; (2) to retire $232.3 million in indebtedness outstanding under the Company’s prior credit facility; and (3) to fund expenses associated with the Credit Facility and the Brinderson acquisition. Additionally, the Company used $7.0 million of its cash on hand to fund these transactions.
	Generally, interest will be 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 one month LIBOR borrowing rate (LIBOR plus Company’s applicable rate) as of September 30, 2014 was approximately 2.10%.
	The Company’s indebtedness at September 30, 2014 consisted of $325.9 million outstanding from the $350.0 million term loan under the Credit Facility and $45.5 million on the line of credit under the Credit Facility. In July 2014, the Company borrowed $10.0 million on the line of credit for working capital needs. Additionally, the Company and Wasco Coatings UK Ltd. (“Wasco Energy”) loaned Bayou Wasco Insulation, LLC (“Bayou Wasco”), a joint venture between the Company and Wasco Energy, an aggregate of $14.0 million for the purchase of capital assets in 2012 and 2013. Additionally, during September 2014, the Company and Wasco Energy agreed to loan Bayou Wasco an additional $2.6 million for working capital needs increasing the total to $16.6 million. Of such amount, $8.1 million (representing funds loaned by Wasco Energy) was designated as third-party debt in the Company’s consolidated financial statements. In February 2014, the Company and Wasco Energy agreed to a five-year term on the funds loaned; therefore, the amounts are classified as long-term debt as of September 30, 2014. In connection with the formation of Bayou Perma-Pipe Canada, Ltd. (“BPPC”), the Company and Perma-Pipe Canada, Inc. loaned BPPC an aggregate of $8.0 million for the purchase of capital assets and for operating purposes. Additionally, during January 2012, the Company and Perma-Pipe Canada, Inc. agreed to loan BPPC an additional $6.2 million for the purchase of capital assets increasing the total to $14.2 million. Of such amount, $4.5 million was designated as third-party debt in the Company’s consolidated financial statements. The Company also held $0.1 million of third party notes and bank debt at September 30, 2014.
	As of September 30, 2014, the Company had $20.7 million in letters of credit issued and outstanding under the Credit Facility. Of such amount, $11.4 million was collateral for the benefit of certain of our insurance carriers and $9.3 million was for letters of credit or bank guarantees of performance or payment obligations of foreign subsidiaries.
	The Company’s indebtedness at December 31, 2013 consisted of $341.3 million outstanding from the term loan under the Credit Facility and $35.5 million on the line of credit under the Credit Facility. Additionally, the Company designated $11.7 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, 2013.
	At September 30, 2014 and December 31, 2013, the estimated fair value of the Company’s long-term debt was approximately $383.9 million and $380.1 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 11.
	In July 2013, the Company entered into an interest rate swap agreement, for a notional amount of $175.0 million that is set to expire in July 2016. The notional amount of this swap mirrors the amortization of a $175.0 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 0.87% calculated on the amortizing $175.0 million notional amount, and provides for the Company to receive a payment based upon a variable monthly LIBOR interest rate calculated on the amortizing $175.0 million notional amount. The annualized borrowing rate of the swap at September 30, 2014 was approximately 2.19%. The receipt of the monthly LIBOR-based payment offsets a variable monthly LIBOR-based interest cost on a corresponding $175.0 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 will be accounted for as a cash flow hedge.
	The Credit Facility is subject to certain financial covenants, including a consolidated financial leverage ratio and consolidated fixed charge coverage ratio. On October 6, 2014, the Company amended the Credit Facility’s defined terms for income and fixed charges to allow for the add-back of certain cash and non-cash charges related to the 2014 Restructuring Plan when calculating the Company’s compliance with the 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, as amended, 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 exceed 3.75 to 1.00, but decreased, as scheduled, to not more that 3.50 to 1.00 beginning with the quarter ended June 30, 2014. At September 30, 2014, the Company’s consolidated financial leverage ratio was 2.89 to 1.00 and, using the Credit Facility defined income, the Company had the capacity to borrow up to approximately $80.4 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, 2014, the Company’s fixed charge ratio was 1.28 to 1.00.
	At September 30, 2014, the Company was in compliance with all of its debt and financial covenants as required under the Credit Facility.

Note_6_Stockholders_Equity_and

Note 6 - Stockholders' Equity and Equity Compensation	9 Months Ended
	Sep. 30, 2014
Shareholders' Equity and Share-based Payments [Abstract]	'
Stockholders' Equity and Equity Compensation	'
	STOCKHOLDERS’ EQUITY AND EQUITY COMPENSATION
	Share Repurchase Plan
	In February 2014, 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 2014. Once a repurchase is complete, the Company promptly retires the shares. The Company also is 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 and directors. The participants in the Company’s equity plans may surrender shares of previously issued common stock in satisfaction of tax obligations arising from the vesting of restricted stock awards under such plans, in connection with the exercise of stock option awards, and with the lapse of restricted periods of deferred stock unit 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 vests, the shares of the Company’s common stock are surrendered in exchange for stock option exercises or the lapse of the restricted periods of deferred stock unit awards. In addition, in connection with the exercise of employee stock options, the option holder may elect a “net, net” exercise, such that the option holder receives a number of shares equal to (1) 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 (2) 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-month period ended September 30, 2014, the Company acquired 860,761 shares of the Company’s common stock for $20.0 million ($23.24 average price per share) through the open market repurchase program discussed above and 53,286 shares of the Company’s common stock for $1.2 million ($22.66 average price per share) in connection with the satisfaction of tax obligations from the vesting of restricted stock, exercise of stock options and distribution of deferred stock units. In addition, during the nine-month period ended September 30, 2014, the Company acquired 419,643 shares of the Company’s common stock in connection with “net, net” exercises of employee stock options for a gross value of $9.9 million ($1.4 million in cash value). Once repurchased, the Company immediately retired all such shares.
	Equity-Based Compensation Plans
	At September 30, 2014, the Company had two active equity-based compensation plans under which awards may be made, including stock appreciation rights, restricted shares of common stock, performance awards, stock options and stock units. The Company’s 2013 Employee Equity Incentive Plan (the “2013 Employee Plan”) has 2,895,000 shares of the Company’s common stock reserved for issuance and, at September 30, 2014, 1,953,034 shares of common stock were available for issuance. The Company’s 2011 Non-Employee Director Equity Incentive Plan (“2011 Director Plan”) has 250,000 shares of the Company’s common stock registered for issuance and, at September 30, 2014, 135,396 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 recorded as a reduction of current period expense.
	The following table summarizes all stock award activity during the nine months ended September 30, 2014:
		Stock Awards			Weighted
					Average
					Award Date
					Fair Value
	Outstanding at January 1, 2014	555,025			$	22.79
	Restricted shares awarded	226,483			23.81
	Restricted stock units awarded	230,324			24.2
	Restricted shares distributed	(117,086	)		23.69
	Restricted stock units distributed	(15,277	)		21.25
	Restricted shares forfeited	(75,006	)		23.47
	Restricted stock units forfeited	(96,976	)		24.66
	Outstanding at September 30, 2014	707,487			$	23.13
	Expense associated with stock awards was $2.8 million in each of the nine month periods ended September 30, 2014 and 2013. Unrecognized pre-tax expense of $11.4 million related to stock awards is expected to be recognized over the weighted average remaining service period of 2.06 years for awards outstanding at September 30, 2014.
	Expense associated with stock awards was $1.0 million and $0.8 million for the quarters ended September 30, 2014 and 2013, respectively.
	Deferred Stock Unit Awards
	Deferred stock units generally are 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 generally are 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.
	The following table summarizes all deferred stock unit activity during the nine months ended September 30, 2014:
		Deferred			Weighted
		Stock			Average
		Units			Award Date
					Fair Value
	Outstanding at January 1, 2014	214,455			$	19.56
	Awarded	32,904			23.96
	Distributed	(31,794	)		19.7
	Outstanding at September 30, 2014	215,565			$	20.18
	There was no expense associated with awards of deferred stock units for the quarters ended September 30, 2014 and 2013. Expense associated with awards of deferred stock units for the nine months ended September 30, 2014 and 2013 was $0.8 million and $0.9 million, 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.
	The following table summarizes all stock option activity during the nine months ended September 30, 2014:
		Shares			Weighted
					Average
					Exercise
					Price
	Outstanding at January 1, 2014	1,208,824			$	18.54
	Granted	38,820			24.21
	Exercised	(526,359	)		16.36
	Canceled/Expired	(196,802	)		24.37
	Outstanding at September 30, 2014	524,483			$	18.95
	Exercisable at September 30, 2014	460,364			$	19
	Expense associated with stock option grants was $0.1 million and $0.4 million in the quarters ended September 30, 2014 and 2013, respectively. In the nine months ended September 30, 2014 and 2013, the Company recorded expense of $0.6 million and $1.4 million, respectively, related to stock option grants. Unrecognized pre-tax expense of $0.2 million related to stock option grants is expected to be recognized over the weighted average remaining contractual term of 0.90 years for awards outstanding at September 30, 2014.
	Financial data for stock option exercises are summarized in the following table (in thousands):
		Nine Months Ended September 30,
		2014				2013
	Amount collected from stock option exercises	$	8,614			$	738
	Total intrinsic value of stock option exercises	3,771				131
	Tax benefit of stock option exercises recorded in additional paid-in-capital	6				55
	Aggregate intrinsic value of outstanding stock options	2,381				6,983
	Aggregate intrinsic value of exercisable stock options	2,138				5,962
	The intrinsic value calculations are based on the Company’s closing stock price of $22.25 and $23.72 on September 30, 2014 and 2013, respectively.
	The Company uses a binomial option-pricing model for valuation purposes to reflect the features of stock options granted. The fair value of stock options awarded during the nine-month periods ended September 30, 2014 and 2013 were estimated at the date of grant based on the assumptions presented in the table below. Volatility, expected term and dividend yield assumptions were based on the Company’s historical experience. The risk-free rate was based on a U.S. treasury note with a maturity similar to the option grant’s expected term.
		Nine Months Ended September 30,
		2014		2013
	Grant-date fair value	$11.27		$12.92
	Volatility	41.60%		49.80%
Expected term (years)	7		7
Dividend yield	—%		—%
Risk-free rate	2.30%		1.10%

Note_7_Income_Taxes_Notes

Note 7 - Income Taxes (Notes)	9 Months Ended
	Sep. 30, 2014
Note 7 - Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	TAXES ON INCOME
	The effective tax rates in the third quarter and first nine-months of 2014 were unfavorably impacted by a relatively small income tax benefit recorded on significant pre-tax charges related to the restructuring initiative and the impact of discrete tax items that were primarily the result of establishing valuation allowances on net operating losses in jurisdictions where the Company will not have the ability to generate future taxable income.
	The Company’s effective tax rate for continuing operations was 7.8% and 88.3% in the quarter and nine-month period ended September 30, 2014, respectively, compared to 19.7% and 19.3% in the corresponding periods in 2013. The low effective tax rate on the pre-tax loss and the high effective tax rate on pre-tax income for the quarter and nine-month period ended September 30, 2014, respectively, were negatively influenced by recording no tax benefit on losses in jurisdictions where valuation allowances were recorded against deferred tax assets.

Note_8_Commitments_and_Conting

Note 8 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
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 connection with the Brinderson acquisition, certain pre-acquisition matters were identified during the quarter ended June 30, 2014 where a loss is both probable and reasonably estimable. The Company identified the range of possible loss from zero to $24 million. The Company establishes liabilities in accordance with FASB ASC Subtopic No. 450-20, Contingencies – Loss Contingencies, and, accordingly, recorded a $14.5 million accrual for such matters as part of its purchase price accounting for Brinderson (see Note 1). The Company believes it has meritorious defenses against certain of these matters.
	Purchase Commitments
	The Company had no material purchase commitments at September 30, 2014.
	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, 2014 on its consolidated balance sheet.

Note_9_Segment_Reporting

Note 9 - Segment Reporting	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Segment Reporting	'
	SEGMENT REPORTING
	The Company operates in three distinct markets: energy and mining; water and wastewater; and commercial and structural services. Management organizes the Company around differences in products and services. As such, the Company is organized into three reportable segments: Energy and Mining; Water and Wastewater; and Commercial and Structural. Each reportable segment has a senior operating vice president who reports to the chief operating decision maker (“CODM”). The operating results and financial information reported by each segment are evaluated separately, regularly reviewed and used by the CODM to evaluate segment performance, allocate overall resources and determine management incentive compensation.
	During the first quarter of 2014, the Company reorganized its North American Water and Wastewater and International Water and Wastewater reportable segments into a single, reportable segment titled Water and Wastewater. As a result of this reorganization, the entire Water and Wastewater segment reports to the Senior Vice President - Water and Wastewater, who, in turn, reports to the CODM. During 2014, all filings with the Securities and Exchange Commission (“SEC”) have combined these two previously reported segments into a single Waste and Wastewater segment.
	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. Financial results for discontinued operations have been removed for all periods presented. The Company evaluates performance based on stand-alone operating income (loss).
	Financial information by segment was as follows (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues:
	Energy and Mining	$	197,510		$	168,708		$	557,028		$	385,991
	Water and Wastewater	135,649			122,149			371,493			341,680
	Commercial and Structural	16,979			16,808			50,719			48,070
	Total revenues	$	350,138		$	307,665		$	979,240		$	775,741
	Gross profit:
	Energy and Mining	$	29,380		$	37,118		$	100,856		$	87,678
	Water and Wastewater	26,719			26,473			76,078			71,210
	Commercial and Structural	7,840			5,820			19,986			17,228
	Total gross profit	$	63,939		$	69,411		$	196,920		$	176,116
	Operating income (loss):
	Energy and Mining	$	(9,757	)	$	12,874		$	5,661		$	24,481
	Water and Wastewater	(5,450		)	10,071			10,224			21,672
	Commercial and Structural	1,273			(913		)	(66		)	(1,480		)
	Total operating income (loss)	$	(13,934	)	$	22,032		$	15,819		$	44,673
	The following table summarizes revenues, gross profit and operating income by geographic region (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues(1):
	United States	$	242,795		$	202,353		$	681,043		$	496,544
	Canada	55,742			56,026			139,817			131,172
	Europe	20,096			20,605			63,887			65,592
	Other foreign	31,505			28,681			94,493			82,433
	Total revenues	$	350,138		$	307,665		$	979,240		$	775,741
	Gross profit:
	United States	$	40,507		$	43,838		$	132,790		$	111,006
	Canada	13,893			14,351			32,889			31,753
	Europe	3,544			4,769			12,846			15,453
	Other foreign	5,995			6,453			18,395			17,904
	Total gross profit	$	63,939		$	69,411		$	196,920		$	176,116
	Operating income (loss):
	United States	$	(12,955	)	$	8,941		$	604		$	16,067
	Canada	10,359			10,397			21,911			20,622
	Europe	(687		)	1,106			692			3,928
	Other foreign	(10,651		)	1,588			(7,388		)	4,056
	Total operating income (loss)	$	(13,934	)	$	22,032		$	15,819		$	44,673
	__________________________
	(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.

Note_10_Discontinued_Operation

Note 10 - Discontinued Operations	9 Months Ended
	Sep. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	DISCONTINUED OPERATIONS
	During the second quarter of 2013, the Company’s board of directors approved a plan of liquidation for its BWW business in an effort to improve the Company’s overall financial performance and align the operations with its long-term strategic objectives. BWW provided specialty welding and fabrication services from its facility in Louisiana. Financial results for BWW were part of the Company’s Energy and Mining segment for financial reporting purposes.
	BWW ceased bidding new work and substantially completed all ongoing projects during the second quarter of 2013. As a result of the closure of BWW, Aegion recognized a pre-tax, non-cash charge of approximately $3.9 million ($2.4 million after-tax, or $0.06 per diluted share) to reflect the impairment of goodwill and intangible assets. The Company also recognized additional non-cash impairment charges for equipment and other assets of approximately $1.1 million on a pre-tax basis ($0.7 million on an after-tax basis, or $0.02 per diluted share), which also was recorded in the second quarter of 2013. The Company expects the cash liquidation value to approximate net asset value as shown in the table below. Net asset value is determined using recorded amounts for assets and liabilities, which are based on Level 3 inputs as defined in Note 11. The Company also incurred cash charges to exit the business of approximately $0.1 million on a pre-tax and post-tax basis, which included property, equipment and vehicle lease termination and buyout costs, employee termination benefits and retention incentives, among other ancillary shut-down expenses. Final liquidation of BWW’s assets is expected to occur by the end of 2014.
	Operating results for discontinued operations are summarized as follows (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues	$	—		$	744		$	—		$	8,864
	Gross loss	—			(837		)	(67		)	(4,077		)
	Operating expenses	215			210			617			1,828
	Closure charges of welding business	—			—			—			5,019
	Operating loss	(215		)	(1,047		)	(684		)	(10,924		)
	Interest expense	—			—			—			(25		)
	Other income (expense)	(1		)	—			(74		)	207
	Loss before income tax	(216		)	(1,047		)	(758		)	(10,742		)
	Tax benefit	86			489			132			4,286
	Net loss	(130		)	(558		)	(626		)	(6,456		)
	Balance sheet data for discontinued operations was as follows (in thousands):
		September 30,			December 31,
		2014			2013
	Restricted cash	$	1,193		$	1,193
	Receivables, net	3,471			4,038
	Prepaid expenses and other current assets	125			204
	Property, plant and equipment, less accumulated depreciation	955			1,118
	Deferred tax assets	1,236			1,803
	Total assets	$	6,980		$	8,356
	Accounts payable	$	1,566		$	2,050
	Accrued expenses	155			20
	Deferred tax liabilities	224			197
	Total liabilities	$	1,945		$	2,267

Note_11_Derivative_Financial_I

Note 11 - Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2014
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, 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, 2014 and 2013, 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 the cash flow hedges. At September 30, 2014, the Company recorded a net deferred gain of $0.6 million related to the cash flow hedges in other current assets 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 with, and receives royalty payments from its wholly-owned Canadian entities, paid in Canadian Dollars, rather than the Company’s functional currency, U.S. Dollars. In order to reduce the uncertainty of the U.S. Dollar settlement amount of that anticipated future payment from the Canadian entities, the Company uses forward contracts to sell a portion of the anticipated Canadian Dollars to be received at the future date and buys U.S. Dollars.
	In July 2013, the Company replaced its interest rate swap agreement with a notional amount of $83.0 million with an interest rate swap agreement with a notional amount of $175.0 million, which is set to expire in July 2016. The notional amount of this swap mirrors the amortization of a $175.0 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 0.87% calculated on the amortizing $175.0 million notional amount, and provides for the Company to receive a payment based upon a variable monthly LIBOR interest rate calculated on the amortizing $175.0 million notional amount. The receipt of the monthly LIBOR-based payment offsets a variable monthly LIBOR-based interest cost on a corresponding $175.0 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 will be 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 (as defined below) inputs (in thousands):
	Designation of Derivatives		Balance Sheet Location		September 30,				December 31,
					2014				2013
	Derivatives Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	607			$	24
			Total Assets		$	607			$	24
	Interest Rate Swaps		Other non-current liabilities		$	740			$	1,220
			Total Liabilities		$	740			$	1,220
	Derivatives Not Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	292			$	878
			Total Assets		$	292			$	878
			Total Derivative Assets		$	899			$	902
			Total Derivative Liabilities		740				1,220
			Total Net Derivative Asset (Liability)		$	159			$	(318	)
	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 table represents assets and liabilities measured at fair value on a recurring basis and the basis for that measurement (in thousands):
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		30-Sep-14				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	899			$	—			$	899	$	—
	Total	$	899			$	—			$	899	$	—
	Liabilities:
	Interest Rate Swap	$	740			$	—			$	740	$	—
	Total	$	740			$	—			$	740	$	—
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		31-Dec-13				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	902			$	—			$	902	$	—
	Total	$	902			$	—			$	902	$	—
	Liabilities:
	Interest Rate Swap	$	1,220			$	—			$	1,220	$	—
	Total	$	1,220			$	—			$	1,220	$	—
	The following table summarizes the Company’s derivative positions at September 30, 2014:
		Position		Notional				Weighted		Average
				Amount				Average		Exchange
								Remaining		Rate
								Maturity
								In Years
	Canadian Dollar/USD	Sell		$	33,225,371			0.2		1.12
	Singapore Dollar/USD	Sell		$	1,973,834			0.2		1.28
	Hong Kong Dollar/USD	Sell		$	1,558,146			0.2		7.77
	Australian Dollar/USD	Sell		$	3,030,088			0.2		0.87
	USD/British Pound	Sell		£	1,900,000			0.2		1.62
	EURO/British Pound	Sell		£	8,000,000			0.2		0.78
	Interest Rate Swap			$	162,968,750			1.8
	The Company had no transfers between Level 1, 2 or 3 inputs during the nine months ended September 30, 2014. Certain financial instruments are required to be recorded at fair value. Changes in assumptions or estimation methods could affect the fair value estimates; however, we do not believe any such changes would have a material impact on our 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.

Note_12_Subsequent_Event_Notes

Note 12 - Subsequent Event (Notes)	9 Months Ended
	Sep. 30, 2014
Note 12 - Subsequent Event [Abstract]	'
Subsequent Events [Text Block]	'
	12.    SUBSEQUENT EVENT
	On October 6, 2014, the Company’s board of directors approved the 2014 Restructuring Plan and delegated authority to the Company’s management to determine final actions with respect to 2014 Restructuring Plan. The 2014 Restructuring Plan is intended to exit low-return businesses and reduce the size and cost of the Company’s overhead structure to improve gross margins and profitability in the long term.
	The 2014 Restructuring Plan includes exiting certain unprofitable international locations for the Company’s Water and Wastewater business, consolidating the Company’s worldwide Commercial and Structural business with the Company’s global Water and Wastewater business and eliminating certain idle facilities in the Company’s Bayou Louisiana coatings operations. Effective in the fourth quarter of 2014, the Company will realign its existing three reportable segments into three new reportable segments: Infrastructure Solutions; Corrosion Protection; and Energy Services. The reportable segments will be the same as the Company’s operating segments, which correspond to its management organizational structure. Each new reportable segment will have a operating president who will report to the CODM. The operating results and financial information reported by each of the new segments will be evaluated separately, regularly reviewed and used by the CODM to evaluate segment performance, allocate resources and determine management incentive compensation. All future SEC filings will reflect these new reportable segments.
	As part of the 2014 Restructuring Plan, the Company recognized the following non-cash, pre-tax charges totaling $40.0 million for the quarter and nine months ended September 30, 2014 (in thousands):
		Fixed Asset Impairment		Definite-lived Intangible Asset Impairment		Non-Cash Restructuring Charges		Total Restructuring Charges
	Cost of revenues	$	11,834	$	—	$	3,106	$	14,940
	Operating expenses	36		—		14,081		14,117
	Definite-lived intangible asset impairment	—		10,896		—		10,896
		$	11,870	$	10,896	$	17,187	$	39,953
	The non-cash, pre-tax charge of $40.0 million includes $22.2 million related to the impairment of certain long-lived assets and definite-lived intangible assets for Bayou’s coating operations in Louisiana, which is reported in the Energy and Mining reportable segment, and $17.8 million related to inventory obsolescence, impairment of certain long-lived assets, bad debt expense, write-off of certain other current assets and a legal accrual related to disputed work performed for the Company’s European and Asia-Pacific operations, which are reported in the Water and Wastewater reportable segment.
	Included in the 2014 Restructuring Plan is a reduction of the Company’s overhead expenses and related elimination of approximately 170 full-time positions out of approximately 6,000 employees worldwide. The Company expects pre-tax cash charges of $15 million to $18 million to be incurred from the fourth quarter of 2014 through the third quarter of 2015 for related employee severance, extension of benefits, employment assistance programs and other costs associated with the restructuring. Additional non-cash charges related to the various restructured operations could potentially be recorded between the fourth quarter of 2014 and the third quarter of 2015.

Note_2_Accounting_Policies_Pol

Note 2 - Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Accounting Policies [Abstract]	'
Income Tax, Policy [Policy Text Block]	'
	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 7 for additional information regarding taxes on income.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	'
	Long-Lived Assets
	Property, plant and equipment and other identified intangibles (primarily customer relationships, patents and acquired technologies, trademarks, licenses, contract backlog and non-compete agreements) are recorded at cost 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.
	On October 6, 2014, the Company’s board of directors approved the 2014 Restructuring Plan as discussed further in Note 12. As part of the 2014 Restructuring Plan, the Company evaluated the long-lived assets of its global operations affected by the restructuring initiative. In the early stages of the evaluation process, the Company reviewed the financial performance of all at risk asset groups within each affected reporting unit. Due to the ongoing weak economic conditions and weak economic outlook for certain at risk asset groups, the Company decided to no longer focus on the possible growth opportunities within these businesses; therefore, the Company would no longer provide cash flow or operational support to these businesses. This decision was deemed a significant adverse change in the extent or manner in which the asset is currently being used, and as such, the Company performed an asset impairment review as of September 30, 2014 for all of its at risk asset groups within each of the affected reporting units in accordance with ASC 360 Property, Plant and Equipment (“FASB ASC 360”).
	The affected asset groups include: (i) the Bayou and Bayou Delta asset groups within the Bayou reporting unit (“Bayou Reporting Unit”); (ii) the France and Switzerland asset groups within the European Sewer and Water Rehabilitation (“Europe”) reporting unit; and (iii) the Singapore, Hong Kong, Malaysia and India asset groups within the Asia-Pacific Sewer and Water Rehabilitation (“Asia-Pacific”) reporting unit. The results of the Bayou Reporting Unit and its related asset groups are reported within the Energy and Mining reportable segment. The results of Europe and Asia-Pacific and their related asset groups are reported within the Water and Wastewater reportable segment.
	The assets of each asset group represent the lowest level for which identifiable cash flows can be determined independent of other groups of assets and liabilities. The Company developed internal forward business plans under the guidance of local and regional leadership to determine the undiscounted expected future cash flows derived from each of the at risk asset groups’ long-lived assets. Such were based on management’s best estimates considering the likelihood of various outcomes. Based on the internal projections, the Company determined that the undiscounted expected future cash flows for all of the at risk asset groups referenced above were less than the carrying value of the assets, and as a result, engaged a third-party valuation firm to assist in determining the fair value of long-lived assets at these at risk asset groups.
	In order to determine the impairment amount of long-lived assets, the Company first determined the fair value of each key component of its long-lived assets at each asset group. For property and equipment, the Company primarily utilized the cost and market approaches, which involved the use of significant estimates and assumptions such as salvage and scrap market data and producer price indices. The Company also considered functional and economic obsolescence related to the business and the assets. Based upon the results of the analysis, the at risk asset groups with a fair value less than the carrying value of their respective assets included Bayou, Bayou Delta, France, Malaysia and India. Accordingly, the Company recorded a total impairment charge of $11.9 million in the quarter and nine months ended September 30, 2014, which consisted of $10.9 million related to Bayou, $0.4 million related to Bayou Delta, $0.2 million related to France, $0.3 million related to Malaysia and $0.1 million related to India. The impairment charge was primarily recorded to cost of revenues in the Consolidated Statements of Operations.
	Included within the impairment assessment were Bayou-related intangible assets such as tradenames and customer relationships that were also tested on an undiscounted cash flow basis. For customer relationships, the undiscounted expected future cash flows were less than the carrying value; thus, the Company engaged a third-party valuation firm to assist in determining the fair value of customer relationships recorded at Bayou. In order to determine the impairment amount of the customer relationships intangible asset, the Company calculated the fair value of the intangible based on the multi-period excess earnings method, which utilizes discounted cash flows to evaluate the net earnings attributable to the asset being measured. Key assumptions used in assessment include the discount rate (based on weighted-average cost of capital), revenue growth rates, contributory asset charges and working capital needs, which were based on current market conditions and were consistent with internal management projections.
	Based on the results of the valuation, the carrying amount of the customer relationship intangible asset at Bayou exceeded the fair value and resulted in a full impairment as of September 30, 2014. Accordingly, the Company recorded a $10.9 million impairment charge for the quarter and nine months ended September 30, 2014. The impairment charge was recorded to definite-lived intangible asset impairment in the Consolidated Statements of Operations.
	The fair value estimates described above were determined using observable inputs and significant unobservable inputs, which are based on level 3 inputs as defined in Note 11.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	'
	Goodwill
	Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. Under FASB ASC 350, Intangibles – Goodwill and Other (“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. The annual assessment was last completed as of October 1, 2013. See Note 4 for additional information regarding goodwill by operating segment. Factors that could potentially trigger an interim impairment review include (but are not limited to):
	•	significant underperformance of a reporting unit relative to expected, historical or forecasted future operating results;
	•	significant negative industry or economic trends;
	•	significant changes in the strategy for a reporting unit including extended slowdowns in a segment’s market;
	•	a decrease in the Company’s market capitalization below its book value; and
	•	a significant change in regulations.
	As a result of the 2014 Restructuring Plan, the Company evaluated the goodwill of its global operations affected by the restructuring initiative and determined that a triggering event had occurred. As such, the Company performed a goodwill impairment review for each affected reporting unit as of September 30, 2014. The Company’s reporting units adversely affected by the 2014 Restructuring Plan were Bayou, Europe and Asia-Pacific. In accordance with the provisions of FASB ASC 350, the Company determined the fair value of its reporting units and compared such fair value to the carrying value of those reporting units. For all three reporting units, fair value exceeded carrying value.
	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. Management believes this approach is appropriate because it provides a fair value estimate using multiples from entities with operations and economic characteristics comparable to the Company’s 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. Management 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. Management determines the appropriate discount rate for each of the Company’s 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 were adjusted, as appropriate, to account for company-specific risks associated with each reporting unit.
	Other significant assumptions used in the Company’s goodwill review included: (i) annual revenue growth rates generally ranging from 2% to 7%; (ii) sustained or slightly increased gross margins; (iii) peer group EBITDA multiples; and (iv) terminal values for each reporting unit using a long-term growth rate of 2.5% to 3.0%. If actual results differ from estimates used in these calculations, we could incur future impairment charges.
	For the Bayou Reporting Unit, the excess of fair value in relation to its carrying value was 10.2%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis; however, the fair value in relation to its carrying value improved from the prior year due to a decrease in carrying value as of the valuation dates. During the first nine months of 2014, the carrying value at the Bayou Reporting Unit was lowered due to the sale of its interest in Bayou Coating as described in Note 1 and the impairment of tangible and intangibles assets described above. The fair value for the Bayou Reporting Unit decreased $48.0 million, or 30.9%, from the prior year analysis due to the suspension of a material contract, a lack of project activity available in the Gulf of Mexico market and customer-driven project delays. The impairment analysis assumed a weighted average cost of capital of 13.5% and a long-term growth rate of 3%. The analysis also included an annual revenue growth rate of approximately 5%; modestly higher than the prior year actual results, but at a level that is below our five-year average. Projected cash flows anticipate a modest recovery in the Gulf of Mexico market beginning in 2015. The Company noted improved visibility into larger bidding opportunities for deep water drilling activities in the Gulf of Mexico; however, there is a significant lead time from drilling to the point of building the pipeline infrastructure, or gather lines, to bring oil and natural gas onshore for refinement. This extended lead time creates added uncertainty and could have a material negative impact on long-term projected cash flows. Additionally, projected cash flows related to the Bayou Reporting Unit’s new insulation facility located in Louisiana are subject to final operational testing and largely dependent, in 2015 and 2016, on a single, large customer with a long-standing history with the Company. The Bayou Reporting Unit’s Canadian coating operation, while not as reliant on larger projects, is dependent upon overall increased project activity in order to realize the cash flow projections included in the impairment analysis. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	For Europe, the excess of fair value in relation to its carrying value was 9.3%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis, and the fair value in relation to its carrying value declined from the prior year due to exiting certain European operations. The fair value for Europe decreased $8.2 million, or 9.5%, from the prior year analysis. The impairment analysis assumed a weighted average cost of capital of 14.0% and a long-term growth rate of 2.5%. The analysis also included an annual revenue growth rate of approximately 5%; slightly below the prior year results, and certain cost savings expected to be achieved through the 2014 Restructuring Plan. In addition, projected cash flows were also based, in part, on the successful closure of the Insituform contacting operations in France and Switzerland. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	For Asia-Pacific, the excess of fair value in relation to its carrying value was 12.1%. The values derived from both the income approach and market approach decreased from the October 1, 2013 analysis, and the fair value in relation to its carrying value declined from the prior year due to exiting certain Asia-Pacific operations, many of which, however, were underperforming. The fair value for Asia-Pacific decreased $18.0 million, or 36.4%, from the prior year analysis. The impairment analysis assumed a weighted average cost of capital of 14.0% and a long-term growth rate of 3.0%. The analysis also included an annual revenue growth rate of approximately 5% for the remaining operations and certain cost savings expected to be achieved through the 2014 Restructuring Plan. In addition, projected cash flows were also based, in part, on the successful closure of the Insituform contracting operations in India, Hong Kong, Malaysia and Singapore. If any of these assumptions do not materialize in a manner consistent with the Company’s expectations, there is risk of impairment to recorded goodwill.
	The total value of goodwill recorded at September 30, 2014 for the Bayou, Europe and Asia-Pacific reporting units was $29.7 million, $20.4 million and $5.3 million, respectively. The Company will perform its annual goodwill assessment for all of its reporting units as of October 1, 2014.
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 Brinderson are derived mainly from multiple maintenance contracts under multi-year, long-term Master Service Agreements and alliance contracts, as well as, engineering and construction-type contracts. Brinderson enters into contracts with its customers 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. Brinderson also performs 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 Transaction	'
	Foreign Currency Translation
	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. Net foreign exchange transaction gains (losses) are included in other income (expense) in the Consolidated Statements of Operations. Due to the strengthening of the U.S. Dollar, there was a substantial decrease with respect to certain functional currencies and their relation to the U.S. Dollar during the third quarter of 2014, most notably the Canadian Dollar, British Pound and Euro.
	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, 2014 and 2013, the Company had accumulated income (loss) of $(13.9) million and $2.1 million, respectively, related to currency translation adjustments, $(0.1) million and $1.3 million, respectively, related to derivative transactions and $(0.2) million and $0.2 million, respectively, related to pension activity in accumulated other comprehensive income.
Investments in Affiliated Companies	'
	Investments in Affiliated Companies
	On March 31, 2014, the Company sold its forty-nine percent (49%) interest in Bayou Coating to Stupp, the holder of the remaining fifty-one percent (51%) interest in Bayou Coating. Stupp purchased the interest by exercising an existing option to acquire the Company’s interest in Bayou Coating at a purchase price equal to $9.1 million. The Company had previously received an indication from Stupp of its intent to exercise such option and, in the second quarter of 2013 in connection with such indication, the Company recognized a non-cash charge of $2.7 million ($1.8 million post-tax) related to the goodwill allocated to the joint venture as part of the purchase price accounting associated with the 2009 acquisition of Bayou. The non-cash charge represented the Company’s then current estimate of the difference between the carrying value of the investment on the balance sheet and the amount the Company would receive in connection with the exercise. During the first quarter of 2014, the difference between the Company’s recorded gross equity in earnings of affiliated companies of approximately $1.2 million and the final equity distribution settlement of $0.7 million resulted in a loss of approximately $0.5 million that is recorded in other income (expense) on the consolidated statement of operations.
	Prior to March 2014, the Company held a fifty-nine (59%) equity interest in Bayou Delta through which the Company offers pipe jointing and other services for the steel-coated pipe industry. The remaining forty-one percent (41%) was held by Bayou Coating. On March 31, 2014, the Company acquired this forty-one percent (41%) interest from Bayou Coating by exercising its existing option at a purchase price equal to $0.6 million. As a result, Bayou Delta is now a wholly owned subsidiary of the Company.
	In June 2013, the Company sold its fifty percent (50%) interest in Insituform-Germany to Aarsleff. Insituform-Germany, a company that was jointly owned by Aegion and Aarsleff, is active in the business of no-dig pipe rehabilitation in Germany, Slovakia and Hungary. The sale price was €14.0 million, approximately $18.3 million. The sale resulted in a gain on the sale of approximately $11.3 million (net of $0.5 million of transaction expenses). In connection with the sale, Insituform-Germany also entered into a tube supply agreement with the Company whereby Insituform-Germany will purchase on an annual basis at least GBP 2.3 million, approximately $3.6 million, of felt cured-in-place pipe (“CIPP”) liners during the two-year period from June 26, 2013 to June 30, 2015.
	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, are accounted for by the equity method. At December 31, 2013, the investment in affiliated companies on the Company’s consolidated balance sheets was $9.1 million. Due to the sale of Bayou Coating, the balance was zero at September 30, 2014.
	Net income presented below for the quarters ended September 30, 2014 and 2013 includes Bayou Coating’s previously held forty-one percent (41%) interest in Bayou Delta, which is eliminated for purposes of determining the Company’s equity in earnings of affiliated companies because Bayou Delta is consolidated in the Company’s financial statements as a result of its additional ownership through another Company subsidiary.
	The Company’s equity in earnings of affiliated companies for all periods presented below includes acquisition-related depreciation and amortization expense and is net of income taxes associated with these earnings. Financial data for these investments in affiliated companies for each of the nine month periods ended September 30, 2014 and 2013 is summarized in the following table (in thousands):
		Nine Months Ended September 30,
	Income statement data	2014		2013 (1)
	Revenue	$	9,088	$	75,986
	Gross profit	3,489		21,753
	Net income	2,413		13,624
	Equity in earnings of affiliated companies	677		3,903
	_____________________
	(1)    Includes the financial data of Insituform-Germany through its sale in June 2013.
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.
Newly Issued Accounting Pronouncements	'
	Newly Issued Accounting Pronouncements
	In April 2014, the FASB issued guidance that changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. Under the new guidance, a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results and is disposed of or classified as held for sale. The standard also introduces several new disclosures. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date and is effective for annual and interim periods beginning after December 15, 2014, with earlier adoption permitted. The Company does not expect that the adoption of this standard will have a material effect on its 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 nonfinancial 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, 2016. The Company is currently evaluating the effect the guidance will have on its financial condition and results of operations.

Note_1_General_Tables

Note 1 - General (Tables)	9 Months Ended
	Sep. 30, 2014
General [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	'
	The following table summarizes the fair value of identified assets and liabilities of the Brinderson acquisition at its acquisition date (in thousands):
	Cash	$	3,842
	Receivables and cost and estimated earnings in excess of billings	28,353
	Prepaid expenses and other current assets	655
	Property, plant and equipment	6,848
	Identified intangible assets	60,210
	Other assets	1,071
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	(30,622		)
	Total identifiable net assets	$	70,357
	Total consideration recorded	$	147,605
	Less: total identifiable net assets	70,357
	Goodwill at September 30, 2014	$	77,248
Pro Forma [Member]	'
General [Line Items]	'
Business Acquisition, Pro Forma Information	'
	The following unaudited pro forma summary presents combined information of the Company as if the Brinderson acquisition had occurred at the beginning of the year preceding its acquisition (in thousands):
		Nine Months Ended
		30-Sep-13
	Revenues	$	885,842
	Net income (1)	40,889
	_____________________
	(1)	Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded at the beginning of the year preceding the acquisition date.
Since Acquisition [Member]	'
General [Line Items]	'
Business Acquisition, Pro Forma Information	'
	The Brinderson acquisition made the following contributions to the Company’s revenues and profits (in thousands):
		Quarter Ended			Nine Months Ended
		30-Sep-14			30-Sep-14
	Revenues	$	77,353		$	225,940
	Net income	3,503			8,430

Note_2_Accounting_Policies_Tab

Note 2 - Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2014
Balance Sheet [Member]	'
Note 2 - Accounting Policies [Line Items]	'
Schedule of Variable Interest Entities [Table Text Block]	'
	Financial data for consolidated variable interest entities are summarized in the following table (in thousands):
	Balance sheet data	September 30,		December 31,
		2014		2013
	Current assets	$	58,646	$	55,960
	Non-current assets	44,769		47,606
	Current liabilities	25,697		27,335
	Non-current liabilities	37,215		36,761
Income Statement [Member]	'
Note 2 - Accounting Policies [Line Items]	'
Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block]	'
	Financial data for these investments in affiliated companies for each of the nine month periods ended September 30, 2014 and 2013 is summarized in the following table (in thousands):
		Nine Months Ended September 30,
	Income statement data	2014		2013 (1)
	Revenue	$	9,088	$	75,986
	Gross profit	3,489		21,753
	Net income	2,413		13,624
	Equity in earnings of affiliated companies	677		3,903
	_____________________
	(1)    Includes the financial data of Insituform-Germany through its sale in June 2013.
Schedule of Variable Interest Entities [Table Text Block]	'
		Nine Months Ended September 30,
	Income statement data	2014		2013
	Revenue	$	58,942	$	62,650
	Gross profit	9,370		10,179
	Net income	714		2,040

Note_3_Share_Information_Table

Note 3 - Share Information (Tables)	9 Months Ended
	Sep. 30, 2014
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
		September 30,		September 30,
		2014	2013	2014	2013
	Weighted average number of common shares used for basic EPS	37,406,061	38,672,441	37,752,472	38,836,276
	Effect of dilutive stock options and restricted and deferred stock unit awards	—	398,932	360,317	392,349
	Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	37,406,061	39,071,373	38,112,789	39,228,625

Note_4_Goodwill_and_Intangible1

Note 4 - Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	Goodwill
	(In thousands)
		Energy and				Water and				Commercial				Total
		Mining				Wastewater				and Structural
	Beginning balance at January 1, 2014	$	153,110			$	130,078			$	65,492			$	348,680
	Additions to goodwill through acquisitions (1)	—				—				1,098				1,098
	Foreign currency translation	(609		)		(1,845		)		(88		)		(2,542		)
	Balance at September 30, 2014	$	152,501			$	128,233			$	66,502			$	347,236
	__________________________
	(1)	During the second quarter of 2014, the Company recorded goodwill of $1.1 million related to the 2012 acquisition of Fyfe Asia (see Note 1).
Schedule of Finite-Lived Intangible Assets	'
	Identified Intangible Assets
	(In thousands)			30-Sep-14												31-Dec-13
		Weighted		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
		Average
		Useful
		Lives
		(Years)
	License agreements	6		$	3,912			$	(3,094	)		$	818			$	3,917	$	(2,977	)	$	940
	Backlog	0		4,736				(4,736		)		—				4,745		(4,745		)	—
	Leases	12		2,067				(588		)		1,479				2,067		(477		)	1,590
	Trademarks	16		21,648				(4,941		)		16,707				21,394		(4,167		)	17,227
	Non-competes	4		1,140				(817		)		323				1,140		(753		)	387
	Customer relationships (1)	14		147,704				(12,517		)		135,187				182,703		(28,287		)	154,416
	Patents and acquired technology	16		59,152				(23,692		)		35,460				57,419		(22,696		)	34,723
				$	240,359			$	(50,385	)		$	189,974			$	273,385	$	(64,102	)	$	209,283
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	'
	Estimated amortization expense by year is as follows (in thousands):
	2014		$	14,224
	2015		13,509
	2016		13,516
	2017		13,469
	2018		13,391

Note_6_Stockholders_Equity_and1

Note 6 - Stockholders' Equity and Equity Compensation (Tables)	9 Months Ended
	Sep. 30, 2014
Shareholders' Equity and Share-based Payments [Abstract]	'
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	'
	The following table summarizes all stock award activity during the nine months ended September 30, 2014:
		Stock Awards			Weighted
					Average
					Award Date
					Fair Value
	Outstanding at January 1, 2014	555,025			$	22.79
	Restricted shares awarded	226,483			23.81
	Restricted stock units awarded	230,324			24.2
	Restricted shares distributed	(117,086	)		23.69
	Restricted stock units distributed	(15,277	)		21.25
	Restricted shares forfeited	(75,006	)		23.47
	Restricted stock units forfeited	(96,976	)		24.66
	Outstanding at September 30, 2014	707,487			$	23.13
Schedule of Other Share-based Compensation, Activity	'
	The following table summarizes all deferred stock unit activity during the nine months ended September 30, 2014:
		Deferred			Weighted
		Stock			Average
		Units			Award Date
					Fair Value
	Outstanding at January 1, 2014	214,455			$	19.56
	Awarded	32,904			23.96
	Distributed	(31,794	)		19.7
	Outstanding at September 30, 2014	215,565			$	20.18
Schedule of Share-based Compensation, Stock Options, Activity	'
	The following table summarizes all stock option activity during the nine months ended September 30, 2014:
		Shares			Weighted
					Average
					Exercise
					Price
	Outstanding at January 1, 2014	1,208,824			$	18.54
	Granted	38,820			24.21
	Exercised	(526,359	)		16.36
	Canceled/Expired	(196,802	)		24.37
	Outstanding at September 30, 2014	524,483			$	18.95
	Exercisable at September 30, 2014	460,364			$	19
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity	'
	Financial data for stock option exercises are summarized in the following table (in thousands):
		Nine Months Ended September 30,
		2014				2013
	Amount collected from stock option exercises	$	8,614			$	738
	Total intrinsic value of stock option exercises	3,771				131
	Tax benefit of stock option exercises recorded in additional paid-in-capital	6				55
	Aggregate intrinsic value of outstanding stock options	2,381				6,983
	Aggregate intrinsic value of exercisable stock options	2,138				5,962
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
		Nine Months Ended September 30,
		2014		2013
	Grant-date fair value	$11.27		$12.92
	Volatility	41.60%		49.80%
	Expected term (years)	7		7
	Dividend yield	—%		—%
	Risk-free rate	2.30%		1.10%

Note_9_Segment_Reporting_Table

Note 9 - Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2014
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	Financial information by segment was as follows (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues:
	Energy and Mining	$	197,510		$	168,708		$	557,028		$	385,991
	Water and Wastewater	135,649			122,149			371,493			341,680
	Commercial and Structural	16,979			16,808			50,719			48,070
	Total revenues	$	350,138		$	307,665		$	979,240		$	775,741
	Gross profit:
	Energy and Mining	$	29,380		$	37,118		$	100,856		$	87,678
	Water and Wastewater	26,719			26,473			76,078			71,210
	Commercial and Structural	7,840			5,820			19,986			17,228
	Total gross profit	$	63,939		$	69,411		$	196,920		$	176,116
	Operating income (loss):
	Energy and Mining	$	(9,757	)	$	12,874		$	5,661		$	24,481
	Water and Wastewater	(5,450		)	10,071			10,224			21,672
	Commercial and Structural	1,273			(913		)	(66		)	(1,480		)
	Total operating income (loss)	$	(13,934	)	$	22,032		$	15,819		$	44,673
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area	'
	The following table summarizes revenues, gross profit and operating income by geographic region (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues(1):
	United States	$	242,795		$	202,353		$	681,043		$	496,544
	Canada	55,742			56,026			139,817			131,172
	Europe	20,096			20,605			63,887			65,592
	Other foreign	31,505			28,681			94,493			82,433
	Total revenues	$	350,138		$	307,665		$	979,240		$	775,741
	Gross profit:
	United States	$	40,507		$	43,838		$	132,790		$	111,006
	Canada	13,893			14,351			32,889			31,753
	Europe	3,544			4,769			12,846			15,453
	Other foreign	5,995			6,453			18,395			17,904
	Total gross profit	$	63,939		$	69,411		$	196,920		$	176,116
	Operating income (loss):
	United States	$	(12,955	)	$	8,941		$	604		$	16,067
	Canada	10,359			10,397			21,911			20,622
	Europe	(687		)	1,106			692			3,928
	Other foreign	(10,651		)	1,588			(7,388		)	4,056
	Total operating income (loss)	$	(13,934	)	$	22,032		$	15,819		$	44,673
	__________________________
	(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.

Note_10_Discontinued_Operation1

Note 10 - Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2014
Income Statement [Member]	'
Note 9 - Discontinued Operations (Tables) [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	'
	Operating results for discontinued operations are summarized as follows (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Revenues	$	—		$	744		$	—		$	8,864
	Gross loss	—			(837		)	(67		)	(4,077		)
	Operating expenses	215			210			617			1,828
	Closure charges of welding business	—			—			—			5,019
	Operating loss	(215		)	(1,047		)	(684		)	(10,924		)
	Interest expense	—			—			—			(25		)
	Other income (expense)	(1		)	—			(74		)	207
	Loss before income tax	(216		)	(1,047		)	(758		)	(10,742		)
	Tax benefit	86			489			132			4,286
	Net loss	(130		)	(558		)	(626		)	(6,456		)
Balance Sheet [Member]	'
Note 9 - Discontinued Operations (Tables) [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	'
	Balance sheet data for discontinued operations was as follows (in thousands):
		September 30,			December 31,
		2014			2013
	Restricted cash	$	1,193		$	1,193
	Receivables, net	3,471			4,038
	Prepaid expenses and other current assets	125			204
	Property, plant and equipment, less accumulated depreciation	955			1,118
	Deferred tax assets	1,236			1,803
	Total assets	$	6,980		$	8,356
	Accounts payable	$	1,566		$	2,050
	Accrued expenses	155			20
	Deferred tax liabilities	224			197
	Total liabilities	$	1,945		$	2,267

Note_11_Derivative_Financial_I1

Note 11 - Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	'
	The following table provides a summary of the fair value amounts of our derivative instruments, all of which are Level 2 (as defined below) inputs (in thousands):
	Designation of Derivatives		Balance Sheet Location		September 30,				December 31,
					2014				2013
	Derivatives Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	607			$	24
			Total Assets		$	607			$	24
	Interest Rate Swaps		Other non-current liabilities		$	740			$	1,220
			Total Liabilities		$	740			$	1,220
	Derivatives Not Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	292			$	878
			Total Assets		$	292			$	878
			Total Derivative Assets		$	899			$	902
			Total Derivative Liabilities		740				1,220
			Total Net Derivative Asset (Liability)		$	159			$	(318	)
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	'
	The following table represents assets and liabilities measured at fair value on a recurring basis and the basis for that measurement (in thousands):
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		30-Sep-14				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	899			$	—			$	899	$	—
	Total	$	899			$	—			$	899	$	—
	Liabilities:
	Interest Rate Swap	$	740			$	—			$	740	$	—
	Total	$	740			$	—			$	740	$	—
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		31-Dec-13				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	902			$	—			$	902	$	—
	Total	$	902			$	—			$	902	$	—
	Liabilities:
	Interest Rate Swap	$	1,220			$	—			$	1,220	$	—
	Total	$	1,220			$	—			$	1,220	$	—
Schedule of Notional Amounts of Outstanding Derivative Positions	'
	The following table summarizes the Company’s derivative positions at September 30, 2014:
		Position		Notional				Weighted		Average
				Amount				Average		Exchange
								Remaining		Rate
								Maturity
								In Years
	Canadian Dollar/USD	Sell		$	33,225,371			0.2		1.12
	Singapore Dollar/USD	Sell		$	1,973,834			0.2		1.28
	Hong Kong Dollar/USD	Sell		$	1,558,146			0.2		7.77
	Australian Dollar/USD	Sell		$	3,030,088			0.2		0.87
	USD/British Pound	Sell		£	1,900,000			0.2		1.62
	EURO/British Pound	Sell		£	8,000,000			0.2		0.78
	Interest Rate Swap			$	162,968,750			1.8

Note_12_Subsequent_Event_Table

Note 12 - Subsequent Event (Tables)	9 Months Ended
	Sep. 30, 2014
Note 12 - Subsequent Event [Abstract]	'
Restructuring and Related Costs [Table Text Block]	'
		Fixed Asset Impairment		Definite-lived Intangible Asset Impairment		Non-Cash Restructuring Charges		Total Restructuring Charges
	Cost of revenues	$	11,834	$	—	$	3,106	$	14,940
	Operating expenses	36		—		14,081		14,117
	Definite-lived intangible asset impairment	—		10,896		—		10,896
		$	11,870	$	10,896	$	17,187	$	39,953

Note_1_General_Details

Note 1 - General (Details)

3 Months Ended

9 Months Ended

12 Months Ended

24 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Jun. 30, 2015

Jun. 30, 2015

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Jul. 02, 2013

Sep. 30, 2014

Sep. 30, 2013

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Jul. 02, 2013

Sep. 30, 2013

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

Goodwill and Intagible Assets [Member]

Tangible Assets [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Delta Double Jointing [Member]

Brinderson LP [Member]

2013 Credit Facility [Member]

Insituform Germany [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

General [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, Acquired During Period

'

'

'

$1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net

'

'

'

'

'

'

'

'

'

'

'

'

150,000,000

'

'

'

'

'

'

'

'

Debt Instrument, Face Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

650,000,000

'

Goodwill and Intangible Asset Impairment

'

3,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill and Intangible Asset Impairment, Net of Tax

'

2,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)

'

'

'

'

'

'

'

'

$0.06

$0.02

'

'

'

'

'

'

'

'

'

'

'

Tangible Asset Impairment Charges

11,870,000

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tangible Asset Impairment Charges, Net of Tax

'

700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Exit Costs

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Ownership Percentage by Parent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

59.00%

'

'

50.00%

Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners

'

'

'

'

'

'

'

'

'

'

'

'

'

51.00%

'

'

'

41.00%

'

'

'

Sale of interests in German joint venture

'

'

'

9,065,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Noncontrolling Interests

'

'

'

617,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

PercentOfBookValue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

49.00%

49.00%

'

'

'

'

Gain (Loss) on Sale of Equity Investments

'

'

'

-472,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Other than Temporary Impairment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,700,000

'

'

'

'

'

'

Equity Method Investment Other Than Temporary Impairment Net Of Tax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,800,000

'

'

'

'

'

'

Total consideration recorded

'

18,300,000

14,000,000

0

-18,300,000

'

'

'

'

'

147,600,000

147,605,000

'

'

'

'

'

'

'

'

'

Gain (Loss) on Disposition of Business

'

11,300,000

'

0

11,771,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Transaction Costs

'

500,000

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Purchase Commitment, Amount (in Pounds)

'

'

'

'

'

'

3,600,000

2,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity in earnings of affiliated companies

0

1,691,000

'

677,000

3,903,000

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

Proceeds from Equity Method Investment, Dividends or Distributions

'

'

'

684,000

4,027,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss Contingency Accrual

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$14,500,000

'

'

Note_1_General_Details_Busines

Note 1 - General (Details) - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions (Brinderson LP [Member], USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Brinderson LP [Member]	'	'
Note 1 - General - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions [Line Items]	'	'
Revenues	$77,353	$225,940
Net income	$3,503	$8,430

Note_1_General_Details_Busines1

Note 1 - General (Details) - Business Acquisitions - Pro Forma Information (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Business Acquisitions - Proforma Information [Abstract]	'	'
Revenues	'	$885,842
Net income (loss)	'	$40,889

Note_1_General_Details_Busines2

Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2014
	USD ($)	EUR (€)	USD ($)	USD ($)	USD ($)	Brinderson LP [Member]	Brinderson LP [Member]
						USD ($)	USD ($)
Note 1 - General - Business Acquisitions - Initial Purchase Price Allocation [Line Items]	'	'	'	'	'	'	'
Cash	'	'	'	'	'	'	$3,842
Receivables and cost and estimated earnings in excess of billings	'	'	'	'	'	'	28,353
Prepaid expenses and other current assets	'	'	'	'	'	'	655
Property, plant and equipment	'	'	'	'	'	'	6,848
Identified intangible assets	'	'	'	'	'	'	60,210
Other assets	'	'	'	'	'	'	1,071
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	'	'	'	'	'	'	-30,622
Total consideration recorded	18,300	14,000	0	-18,300	'	147,600	147,605
Total identifiable net assets	'	'	'	'	'	'	70,357
Goodwill at September 30, 2014	'	'	$347,236	'	$348,680	'	$77,248

Note_2_Accounting_Policies_Det

Note 2 - Accounting Policies (Details)

3 Months Ended

9 Months Ended

24 Months Ended

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

3 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jun. 30, 2015

Jun. 30, 2015

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

GBP (£)

USD ($)

Minimum [Member]

Maximum [Member]

Insituform Germany [Member]

Europe [Member]

Europe [Member]

Asia Pacific [Member]

Asia Pacific [Member]

Bayou [Member]

Bayou [Member]

Bayou [Member]

Delta Double Jointing [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Bayou Coating [Member]

Bayou Delta [Member]

FRANCE

MALAYSIA

INDIA

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Note 2 - Accounting Policies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tangible Asset Impairment Charges

$11,870,000

$1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

$11,000,000

'

'

'

'

'

'

'

$0

$0

$0

$0

Fair Value Inputs, Discount Rate

'

'

'

'

'

'

'

'

'

'

'

14.00%

'

14.00%

'

'

13.50%

'

'

'

'

'

'

'

'

'

'

Fair Value Inputs, Long-term Revenue Growth Rate

'

'

'

'

'

'

'

'

2.50%

3.00%

'

'

3.00%

'

3.00%

'

'

3.00%

'

'

'

'

'

'

'

'

'

Compound Annual Growth Rate Assumption

'

'

'

'

'

'

'

'

2.00%

7.00%

'

5.00%

'

5.00%

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount

'

'

'

'

'

'

'

'

'

'

'

9.30%

'

12.10%

'

10.20%

10.20%

'

'

'

'

'

'

'

'

'

'

PercentOfBookValue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

49.00%

49.00%

'

'

'

'

Sale of interests in German joint venture

'

'

'

9,065,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Other than Temporary Impairment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,700,000

'

'

'

'

'

'

Equity Method Investment Other Than Temporary Impairment Net Of Tax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,800,000

'

'

'

'

'

'

Equity Method Investment, Summarized Financial Information, Net Income (Loss)

0

1,691,000

'

677,000

3,903,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

Proceeds from Equity Method Investment, Dividends or Distributions

'

'

'

684,000

4,027,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Sale of Equity Investments

'

'

'

-472,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax

-13,900,000

2,100,000

'

-13,900,000

2,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax

-100,000

1,300,000

'

-100,000

1,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax

-200,000

200,000

'

-200,000

200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Ownership Percentage by Parent

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

59.00%

'

'

'

'

'

'

'

'

Total consideration recorded

'

18,300,000

14,000,000

0

-18,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Disposition of Business

'

11,300,000

'

0

11,771,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Transaction Costs

'

500,000

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Purchase Commitment, Amount (in Pounds)

'

'

'

'

'

3,600,000

2,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

41.00%

51.00%

'

'

'

'

'

'

'

Payments to Noncontrolling Interests

'

'

'

617,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

'

20.00%

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures

0

'

'

0

'

'

'

9,101,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

347,236,000

'

'

347,236,000

'

'

'

348,680,000

'

'

'

20,400,000

'

5,300,000

'

29,700,000

29,700,000

'

'

'

'

'

'

'

'

'

'

Impairment of Intangible Assets, Finite-lived

10,896,000

0

'

10,896,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reporting Unit, Change in Fair Value, Value

'

'

'

'

'

'

'

'

'

'

'

'

($8,200,000)

'

($18,000,000)

'

'

($48,000,000)

'

'

'

'

'

'

'

'

'

Reporting Unit, Change in Fair Value, Percent

'

'

'

'

'

'

'

'

'

'

'

'

-9.50%

'

-36.40%

'

'

-30.90%

'

'

'

'

'

'

'

'

'

Note_2_Accounting_Policies_Det1

Note 2 - Accounting Policies (Details) - Financial Data for Investments in Affiliated Companies (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financial Data for Investments in Affiliated Companies [Abstract]	'	'	'	'
Revenue	'	'	$9,088	$75,986
Gross profit	'	'	3,489	21,753
Net income	'	'	2,413	13,624
Equity in earnings of affiliated companies	$0	$1,691	$677	$3,903

Note_2_Accounting_Policies_Det2

Note 2 - Accounting Policies (Details) - Financial Data for Variable Interest Entities - Balance Sheet (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financial Data for Variable Interest Entities - Balance Sheet [Abstract]	'	'
Current assets	$58,646	$55,960
Non-current assets	44,769	47,606
Current liabilities	25,697	27,335
Non-current liabilities	$37,215	$36,761

Note_2_Accounting_Policies_Det3

Note 2 - Accounting Policies (Details) - Financial Data for Variable Interest Entities - Income Statement (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Financial Data for Variable Interest Entities - Income Statement [Abstract]	'	'
Revenue	$58,942	$62,650
Gross profit	9,370	10,179
Net income	$714	$2,040

Note_3_Share_Information_Detai

Note 3 - Share Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Weighted Average Number Diluted Shares Outstanding Adjustment	312,091	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	200,665	159,639	200,665	159,639

Note_3_Share_Information_Detai1

Note 3 - Share Information (Details) - Earnings Per Share Calculation, Share Information	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Calculation, Share Information [Abstract]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	200,665	159,639	200,665	159,639
Weighted average number of common shares used for basic EPS	37,406,061	38,672,441	37,752,472	38,836,276
Effect of dilutive stock options and restricted and deferred stock unit awards	0	398,932	360,317	392,349
Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	37,406,061	39,071,373	38,112,789	39,228,625

Note_4_Goodwill_and_Intangible2

Note 4 - Goodwill and Intangible Assets Note 4 - Goodwill and Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Amortization of Intangible Assets	$3.60	$3.70	$10.60	$8.80

Note_4_Goodwill_and_Intangible3

Note 4 - Goodwill and Intangible Assets (Details) - Reconciliation Goodwill (USD $)	9 Months Ended
	Sep. 30, 2014
Goodwill [Line Items]	'
Goodwill, Acquired During Period	$1,100,000
Goodwill [Roll Forward]	'
Goodwill	348,680,000
Foreign currency translation	-2,542,000
Goodwill	347,236,000
Energy And Mining [Member]	'
Goodwill [Line Items]	'
Goodwill, Acquired During Period	0
Goodwill [Roll Forward]	'
Goodwill	153,110,000
Foreign currency translation	-609,000
Goodwill	152,501,000
Water and Wastewater [Member]	'
Goodwill [Line Items]	'
Goodwill, Acquired During Period	0
Goodwill [Roll Forward]	'
Goodwill	130,078,000
Foreign currency translation	-1,845,000
Goodwill	128,233,000
Commercial And Structural [Member]	'
Goodwill [Line Items]	'
Goodwill, Acquired During Period	1,100,000
Goodwill [Roll Forward]	'
Goodwill	65,492,000
Foreign currency translation	-88,000
Goodwill	$66,502,000

Note_4_Goodwill_and_Intangible4

Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	$240,359	'	$240,359	'	$273,385
Accumulated Amortization	-50,385	'	-50,385	'	-64,102
Impairment of Intangible Assets, Finite-lived	10,896	0	10,896	0	'
Net Carrying Amount	189,974	'	189,974	'	209,283
Licensing Agreements [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'6 years	'	'
Gross Carrying Amount	3,912	'	3,912	'	3,917
Accumulated Amortization	-3,094	'	-3,094	'	-2,977
Net Carrying Amount	818	'	818	'	940
Backlog [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'0 years	'	'
Gross Carrying Amount	4,736	'	4,736	'	4,745
Accumulated Amortization	-4,736	'	-4,736	'	-4,745
Net Carrying Amount	0	'	0	'	0
Leases [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'12 years	'	'
Gross Carrying Amount	2,067	'	2,067	'	2,067
Accumulated Amortization	-588	'	-588	'	-477
Net Carrying Amount	1,479	'	1,479	'	1,590
Trademarks [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'16 years	'	'
Gross Carrying Amount	21,648	'	21,648	'	21,394
Accumulated Amortization	-4,941	'	-4,941	'	-4,167
Net Carrying Amount	16,707	'	16,707	'	17,227
Non-competes [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'4 years	'	'
Gross Carrying Amount	1,140	'	1,140	'	1,140
Accumulated Amortization	-817	'	-817	'	-753
Net Carrying Amount	323	'	323	'	387
Customer Relationships [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'14 years	'	'
Gross Carrying Amount	147,704	'	147,704	'	182,703
Accumulated Amortization	-12,517	'	-12,517	'	-28,287
Net Carrying Amount	135,187	'	135,187	'	154,416
Patents and acquired technology [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Weighted Average Useful Lives	'	'	'16 years	'	'
Gross Carrying Amount	59,152	'	59,152	'	57,419
Accumulated Amortization	-23,692	'	-23,692	'	-22,696
Net Carrying Amount	$35,460	'	$35,460	'	$34,723

Note_4_Goodwill_and_Intangible5

Note 4 - Goodwill and Intangible Assets (Details) - Estimated Future Amortization Expense by Year (USD $)	Sep. 30, 2014
In Thousands, unless otherwise specified
Estimated Future Amortization Expense by Year [Abstract]	'
2014	$14,224
2016	13,509
2017	13,516
2017	13,469
2018	$13,391

Note_5_LongTerm_Debt_and_Credi1

Note 5 - Long-Term Debt and Credit Facility (Details)

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Jul. 02, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Jul. 31, 2013

Jul. 02, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Jul. 02, 2013

Jul. 31, 2013

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

Additional [Member]

Initial [Member]

Wasco Energy [Member]

Bayou Wasco [Member]

Initial [Member]

Additional [Member]

Insurance Carriers Collateral [Member]

Work Performance Obligations [Member]

BPPC [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Brinderson LP [Member]

2013 Interest Rate Swap [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Minimum [Member]

Maximum [Member]

USD ($)

USD ($)

USD ($)

USD ($)

Note 5 - Long-Term Debt and Credit Facility [Line Items]

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Debt Instrument, Face Amount

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$650,000,000

'

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'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

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300,000,000

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'

'

'

'

'

Secured Debt

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'

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'

'

'

'

'

'

'

'

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325,900,000

341,300,000

'

350,000,000

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

'

'

'

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'

'

'

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1.25%

2.25%

'

'

'

'

Debt Instrument, Interest Rate at Period End

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'

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2.10%

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Line of Credit Facility, Amount Outstanding

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'

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'

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45,500,000

35,500,000

'

'

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'

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Proceeds from Lines of Credit

'

'

10,000,000

0

'

'

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'

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'

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'

'

Total consideration recorded

18,300,000

14,000,000

0

-18,300,000

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

147,600,000

147,605,000

'

'

Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds

'

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'

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'

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'

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150,000,000

'

Credit Facility, Retired Amount

'

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232,300,000

'

'

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'

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'

'

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'

'

'

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'

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'

'

'

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Business Combination, Consideration Paid

'

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7,000,000

'

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'

'

'

'

'

'

'

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'

'

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'

'

'

'

'

'

Other Loans Payable

'

'

100,000

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Due from Joint Ventures

'

'

'

'

'

'

2,600,000

14,000,000

8,100,000

16,600,000

8,000,000

6,200,000

'

'

14,200,000

'

'

'

'

'

'

'

'

'

'

Other Long-term Debt

'

'

4,500,000

'

11,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Letters of Credit Outstanding, Amount

'

'

20,700,000

'

'

'

'

'

'

'

'

'

11,400,000

9,300,000

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, Fair Value

'

'

383,900,000

'

380,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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Derivative Asset, Notional Amount

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000,000

Derivative, Variable Interest Rate

'

'

2.19%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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Derivative, Amount of Hedged Item

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000,000

'

'

'

'

'

'

'

Derivative, Fixed Interest Rate Percentage

'

'

0.87%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Maximum Consolidated Leverage Ratio

'

'

3.75

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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CreditFacilityMinimumConsolidatedLeverageRatio

'

'

3.5

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

Credit Facility Actual Consolidated Leverage Ratio

'

'

2.89

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Remaining Borrowing Capacity

'

'

$80,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Minimum Consolidated Fixed Charge Ratio

'

'

1.25

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

Credit Facility Actual Consolidated Fixed Charge Ratio

'

'

1.28

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note_6_Stockholders_Equity_and2

Note 6 - Stockholders' Equity and Equity Compensation (Details) (USD $)

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Feb. 28, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2014

Sep. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Through the Open Market Repurchase Program [Member]

In Connection with Equity Compensation Programs [Member]

In Connection with Equity Compensation Programs [Member]

Employee Stock Option [Member]

Stock Awards [Member]

Stock Awards [Member]

Deferred Stock Units [Member]

Deferred Stock Units [Member]

Deferred Stock Units [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

2013 Employee Plan [Member]

2013 Employee Plan [Member]

2011 Director Plan [Member]

Deferred Compensation, Share-based Payments [Member]

Stock Awards [Member]

2011 Director Plan [Member]

Note 6 - Stockholders' Equity and Equity Compensation (Details) [Line Items]

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'

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Stock Repurchase Program, Authorized Amount

$20,000,000

'

'

'

'

'

$10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Shares (in Shares)

'

'

'

'

860,761

53,286

'

419,643

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Value

'

'

'

'

20,000,000

1,200,000

'

9,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Net Cash Value

'

'

'

'

'

'

'

1,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)

'

'

'

'

$23.24

$22.66

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,895,000

'

250,000

'

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number

'

'

'

'

'

'

'

'

707,487

555,025

215,565

'

214,455

'

'

'

'

'

1,953,034

'

135,396

Allocated Share-based Compensation Expense

'

1,000,000

800,000

2,800,000

'

'

'

'

'

'

788,000

890,000

'

100,000

400,000

600,000

1,400,000

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized

'

$11,400,000

'

$11,400,000

'

'

'

'

'

'

'

'

'

$200,000

'

$200,000

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition

'

'

'

'2 years 0 months 22 days

'

'

'

'

'

'

'

'

'

'

'

'0 years 10 months 24 days

'

'

'

'

'

Price Per Share For Intrinsic Value Calculation Stock Options (in Dollars per share)

'

$22.25

$23.72

$22.25

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note_6_Stockholders_Equity_and3

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Stock Award Activity (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
	Restricted Stock [Member]	Restricted Stock Units (RSUs) [Member]	Stock Awards [Member]	Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'	'	'
Stock Awards - Outstanding	'	'	707,487	555,025
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	'	'	$23.13	$22.79
Stock Awards - Awarded	226,483	230,324	'	'
Weighted Average Award Date Fair Value - Awarded (in Dollars per share)	$23.81	$24.20	'	'
Stock Awards - Distributed	-117,086	-15,277	'	'
Weighted Average Award Date Fair Value - Distributed (in Dollars per share)	$23.69	$21.25	'	'
Stock Awards - Forfeited	-75,006	-96,976	'	'
Weighted Average Award Date Fair Value - Forfeited (in Dollars per share)	$23.47	$24.66	'	'
Stock Awards - Outstanding	'	'	707,487	555,025
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	'	'	$23.13	$22.79

Note_6_Stockholders_Equity_and4

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Deferred Stock Unit Activity (Deferred Stock Units [Member], USD $)	9 Months Ended
	Sep. 30, 2014
Deferred Stock Units [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'
Stock Awards - Outstanding	214,455
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	$19.56
Awarded	32,904
Awarded (in Dollars per share)	$23.96
Shares distributed	-31,794
Shares distributed (in Dollars per share)	$19.70
Stock Awards - Outstanding	215,565
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	$20.18

Note_6_Stockholders_Equity_and5

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Stock Option Activity (USD $)	9 Months Ended
	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'
Outstanding at January 1, 2013	1,208,824
Outstanding at January 1, 2013 (in Dollars per share)	$18.54
Granted	38,820
Granted (in Dollars per share)	$24.21
Exercised	-526,359
Exercised (in Dollars per share)	$16.36
Canceled/Expired	-196,802
Canceled/Expired (in Dollars per share)	$24.37
Outstanding at September 30, 2013	524,483
Outstanding at September 30, 2013 (in Dollars per share)	$18.95
Exercisable at September 30, 2013	460,364
Exercisable at September 30, 2013 (in Dollars per share)	$19

Note_6_Stockholders_Equity_and6

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Additional Stock Option Information (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Additional Stock Option Information [Abstract]	'	'
Amount collected from stock option exercises	$8,614	$738
Total intrinsic value of stock option exercises	3,771	131
Tax benefit of stock option exercises recorded in additional paid-in-capital	6	55
Aggregate intrinsic value of outstanding stock options	2,381	6,983
Aggregate intrinsic value of exercisable stock options	$2,138	$5,962

Note_6_Stockholders_Equity_and7

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Binomial Option-Pricing Model Assumptions (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Binomial Option-Pricing Model Assumptions [Abstract]	'	'
Grant-date fair value (in Dollars per share)	$11.27	$12.92
Volatility	41.60%	49.80%
Expected term (years)	'7 years	'7 years
Dividend yield	0.00%	0.00%
Risk-free rate	2.30%	1.10%

Note_7_Income_Taxes_Details

Note 7 - Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Taxes [Abstract]	'	'	'	'
Effective Income Tax Rate Reconciliation, Percent	7.80%	19.70%	88.30%	19.30%

Note_8_Commitments_and_Conting1

Note 8 - Commitments and Contingencies Footnote Details (Details) (USD $)	Sep. 30, 2014
Loss Contingencies [Line Items]	'
Loss Contingency, Range of Possible Loss, Minimum	$0
Loss Contingency, Range of Possible Loss, Maximum	24,000,000
Brinderson LP [Member]	'
Loss Contingencies [Line Items]	'
Loss Contingency Accrual	$14,500,000

Note_9_Segment_Reporting_Detai

Note 9 - Segment Reporting (Details)	9 Months Ended
	Sep. 30, 2014
	segment
	market
Note 8 - Segment Reporting (Details) [Line Items]	'
Number of Markets	3
Number of Reportable Segments	3
Water and Wastewater [Member]	'
Note 8 - Segment Reporting (Details) [Line Items]	'
Number of Reportable Segments	2

Note_9_Segment_Reporting_Detai1

Note 9 - Segment Reporting (Details) - Financial Information by Segment (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Revenues	$350,138	$307,665	$979,240	$775,741
Gross profit:	'	'	'	'
Gross profit	63,939	69,411	196,920	176,116
Operating income (loss):	'	'	'	'
Operating income (loss)	-13,934	22,032	15,819	44,673
Energy And Mining [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	197,510	168,708	557,028	385,991
Gross profit:	'	'	'	'
Gross profit	29,380	37,118	100,856	87,678
Operating income (loss):	'	'	'	'
Operating income (loss)	-9,757	12,874	5,661	24,481
Water and Wastewater [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	135,649	122,149	371,493	341,680
Gross profit:	'	'	'	'
Gross profit	26,719	26,473	76,078	71,210
Operating income (loss):	'	'	'	'
Operating income (loss)	-5,450	10,071	10,224	21,672
Commercial And Structural [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	16,979	16,808	50,719	48,070
Gross profit:	'	'	'	'
Gross profit	7,840	5,820	19,986	17,228
Operating income (loss):	'	'	'	'
Operating income (loss)	$1,273	($913)	($66)	($1,480)

Note_9_Segment_Reporting_Detai2

Note 9 - Segment Reporting (Details) - Summary of Revenues, Gross Profit and Operating Income (Loss) by Geographic Region (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:	'	'	'	'
Revenues	$350,138	$307,665	$979,240	$775,741
Gross Profit:	'	'	'	'
Gross profit	63,939	69,411	196,920	176,116
Operating income (loss)	'	'	'	'
Operating income (loss)	-13,934	22,032	15,819	44,673
United States [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	242,795	202,353	681,043	496,544
Gross Profit:	'	'	'	'
Gross profit	40,507	43,838	132,790	111,006
Operating income (loss)	'	'	'	'
Operating income (loss)	-12,955	8,941	604	16,067
Canada [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	55,742	56,026	139,817	131,172
Gross Profit:	'	'	'	'
Gross profit	13,893	14,351	32,889	31,753
Operating income (loss)	'	'	'	'
Operating income (loss)	10,359	10,397	21,911	20,622
Europe [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	20,096	20,605	63,887	65,592
Gross Profit:	'	'	'	'
Gross profit	3,544	4,769	12,846	15,453
Operating income (loss)	'	'	'	'
Operating income (loss)	-687	1,106	692	3,928
Other foreign [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	31,505	28,681	94,493	82,433
Gross Profit:	'	'	'	'
Gross profit	5,995	6,453	18,395	17,904
Operating income (loss)	'	'	'	'
Operating income (loss)	($10,651)	$1,588	($7,388)	$4,056

Note_10_Discontinued_Operation2

Note 10 - Discontinued Operations (Details) (USD $)	3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Note 9 - Discontinued Operations [Line Items]	'	'	'
Goodwill and Intangible Asset Impairment	'	$3,900,000	'
Goodwill and Intangible Asset Impairment, Net of Tax	'	2,400,000	'
Tangible Asset Impairment Charges	11,870,000	1,100,000	'
Tangible Asset Impairment Charges, Net of Tax	'	700,000	'
Business Exit Costs	'	'	$100,000
Goodwill and Intagible Assets [Member]	'	'	'
Note 9 - Discontinued Operations [Line Items]	'	'	'
Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)	'	$0.06	'
Tangible Assets [Member]	'	'	'
Note 9 - Discontinued Operations [Line Items]	'	'	'
Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)	'	$0.02	'

Note_10_Discontinued_Operation3

Note 10 - Discontinued Operations (Details) - Operating Results for Discontinued Operations (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Closure charges of welding business	'	'	'	'	$100
Interest expense	0	0	0	-25	'
Other expenses	'	'	-74	207	'
Bayou Welding Works [Member]	'	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'	'
Revenues	0	744	0	8,864	'
Gross profit	0	-837	-67	-4,077	'
Operating expenses	215	210	617	1,828	'
Closure charges of welding business	0	0	0	5,019	'
Operating loss	-215	-1,047	-684	-10,924	'
Other expenses	-1	0	'	'	'
Loss before tax benefits	-216	-1,047	-758	-10,742	'
Tax benefits	86	489	-132	-4,286	'
Net loss	($130)	($558)	($626)	($6,456)	'

Note_10_Discontinued_Operation4

Note 10 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (Bayou Welding Works [Member], Discontinued Operations [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Bayou Welding Works [Member] | Discontinued Operations [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Restricted cash	$1,193	$1,193
Receivables, net	3,471	4,038
Prepaid expenses and other current assets	125	204
Property, plant and equipment, less accumulated depreciation	955	1,118
Deferred tax assets	1,236	1,803
Total assets	6,980	8,356
Accounts payable	1,566	2,050
Accrued expenses	155	20
Deferred tax liabilities	224	197
Total liabilities	$1,945	$2,267

Note_11_Derivative_Financial_I2

Note 11 - Derivative Financial Instruments (Details) (USD $)

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jul. 31, 2013

Jul. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Jul. 31, 2013

Jul. 02, 2013

2011 Interest Rate Swap [Member]

2013 Interest Rate Swap [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net

$100,000

$100,000

$100,000

$100,000

'

'

'

'

'

'

'

'

Cash Flow Hedge Derivative Instrument Assets at Fair Value

'

'

'

'

'

'

607,000

24,000

'

'

'

'

Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax

-13,900,000

2,100,000

-13,900,000

2,100,000

'

'

'

'

'

'

'

'

Derivative Asset, Notional Amount

'

'

'

'

83,000,000

175,000,000

'

'

'

'

'

'

Derivative, Amount of Hedged Item

'

'

'

'

'

'

'

'

'

'

175,000,000

'

Secured Debt

'

'

'

'

'

'

'

'

$325,900,000

$341,300,000

'

$350,000,000

Derivative, Fixed Interest Rate Percentage

0.87%

'

0.87%

'

'

'

'

'

'

'

'

'

Note_11_Derivative_Financial_I3

Note 11 - Derivative Financial Instruments (Details) - Summary of the Fair Value Amounts of Derivative Instruments (Fair Value, Inputs, Level 2 [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Inputs, Level 2 [Member]	'	'
Derivatives Designated as Hedging Instruments	'	'
Forward Currency Contracts	$607	$24
Cash Flow Hedge Derivative Instrument Assets at Fair Value	607	24
Interest Rate Swaps	740	1,220
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	740	1,220
Derivatives Not Designated as Hedging Instruments	'	'
Forward Currency Contracts	292	878
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	292	878
Derivative Assets (Liabilities), at Fair Value, Net	$159	($318)

Note_11_Derivative_Financial_I4

Note 11 - Derivative Financial Instruments (Details) - Liabilities Measured at Fair Value on a Recurring Basis and the Basis for that Measurement (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Inputs, Level 3 [Member]	'	'
Liabilities	'	'
Interest Rate Swap	$0	'
Total Derivative Liabilities	0	'
Fair Value, Measurements, Recurring [Member]	'	'
Assets	'	'
Forward Currency Contracts	899	902
Total Derivative Assets	899	902
Liabilities	'	'
Interest Rate Swap	740	1,220
Total Derivative Liabilities	740	1,220
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Assets	'	'
Forward Currency Contracts	0	0
Total Derivative Assets	0	0
Liabilities	'	'
Interest Rate Swap	0	0
Total Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Assets	'	'
Forward Currency Contracts	899	902
Total Derivative Assets	899	902
Liabilities	'	'
Interest Rate Swap	740	1,220
Total Derivative Liabilities	740	1,220
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'	'
Assets	'	'
Forward Currency Contracts	0	0
Total Derivative Assets	0	0
Liabilities	'	'
Interest Rate Swap	'	0
Total Derivative Liabilities	'	$0

Note_11_Derivative_Financial_I5

Note 11 - Derivative Financial Instruments (Details) - Summary of the Company’s Derivative Positions

9 Months Ended

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Canadian Dollar/USD [Member]

Singapore Dollar/USD [Member]

Hong Kong Dollar/USD [Member]

Australian Dollar/USD [Member]

USD/British Pound [Member]

EURO/British Pound [Member]

Interest Rate Swap [Member]

Short [Member]

Short [Member]

Short [Member]

Short [Member]

Short [Member]

Short [Member]

Short [Member]

Canadian Dollar/USD [Member]

Singapore Dollar/USD [Member]

Hong Kong Dollar/USD [Member]

Australian Dollar/USD [Member]

USD/British Pound [Member]

EURO/British Pound [Member]

Interest Rate Swap [Member]

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

GBP (£)

USD ($)

Note 10 - Derivative Financial Instruments (Details) - Summary of the Company’s Derivative Positions [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional Amount

'

'

'

'

'

'

'

$33,225,371

$1,973,834

$1,558,146

$3,030,088

£ 1,900,000

£ 8,000,000

$162,968,750

Weighted Average Remaining Maturity In Years

'2 months 12 days

'2 months 12 days

'2 months 12 days

'2 months 12 days

'2 months 12 days

'2 months 12 days

'1 year 9 months 18 days

'

'

'

'

'

'

'

Average Exchange Rate

1.12

1.28

7.77

0.87

1.62

0.78

'

'

'

'

'

'

'

'

Note_12_Subsequent_Event_Detai

Note 12 - Subsequent Event (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Tangible Asset Impairment Charges	$11,870,000	$1,100,000	'	'
Impairment of Intangible Assets, Finite-lived	10,896,000	0	10,896,000	0
Restructuring Costs and Asset Impairment Charges	39,953,000	'	17,187,000	0
Restructuring Reserve, Settled without Cash	17,187,000	'	'	'
Restructuring and Related Cost, Expected Number of Positions Eliminated	'	'	170	'
Entity Number of Employees	6,000	'	6,000	'
Energy And Mining [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Restructuring Costs and Asset Impairment Charges	22,200,000	'	'	'
Water and Wastewater [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Restructuring Costs and Asset Impairment Charges	17,800,000	'	'	'
Minimum [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Payments for Restructuring	'	'	15,000,000	'
Maximum [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Payments for Restructuring	'	'	18,000,000	'
Cost of Sales [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Tangible Asset Impairment Charges	11,834,000	'	'	'
Impairment of Intangible Assets, Finite-lived	0	'	'	'
Restructuring Costs and Asset Impairment Charges	14,940,000	'	'	'
Restructuring Reserve, Settled without Cash	3,106,000	'	'	'
Operating Expense [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Tangible Asset Impairment Charges	36,000	'	'	'
Impairment of Intangible Assets, Finite-lived	0	'	'	'
Restructuring Costs and Asset Impairment Charges	14,117,000	'	'	'
Restructuring Reserve, Settled without Cash	14,081,000	'	'	'
Definite-lived Intangible Asset Impairment [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Tangible Asset Impairment Charges	0	'	'	'
Impairment of Intangible Assets, Finite-lived	10,896,000	'	'	'
Restructuring Costs and Asset Impairment Charges	10,896,000	'	'	'
Restructuring Reserve, Settled without Cash	$0	'	'	'