Aegion 10-Q 31 Oct 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 25, 2013
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	'	38,374,118
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-13	'
Document Fiscal Year Focus	'2013	'
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, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Revenues	$307,665	$262,867	$775,741		$745,236
Cost of revenues	238,254	199,936	599,625		567,514
Gross profit	69,411	62,931	176,116		177,722
Operating expenses	47,956	42,351	130,112		125,314
Earnout reversal	-2,844	-6,892	-2,844		-6,892
Acquisition-related expenses	2,267	607	4,175		2,594
Operating income	22,032	26,865	44,673		56,706
Other income (expense):	'	'	'		'
Interest expense	-5,454	-2,481	-10,033		-7,591
Interest income	40	86	158		230
Other	-522	-237	6,561		-1,169
Total other expense	-5,936	-2,632	-3,314		-8,530
Income before taxes on income	16,096	24,233	41,359		48,176
Taxes on income	3,164	5,064	7,985		11,862
Income before equity in earnings of affiliated companies	12,932	19,169	33,374		36,314
Equity in earnings of affiliated companies	1,691	2,001	3,903	[1]	4,389
Income from continuing operations	14,623	21,170	37,277		40,703
Loss from discontinued operations	-558	-435	-6,456		-880
Net income	14,065	20,735	30,821		39,823
Non-controlling interests	-127	-1,191	-959		-2,057
Net income attributable to Aegion Corporation	$13,938	$19,544	$29,862		$37,766
Basic:	'	'	'		'
Income from continuing operations (in Dollars per share)	$0.37	$0.51	$0.94		$0.98
Loss from discontinued operations (in Dollars per share)	($0.01)	($0.01)	($0.17)		($0.02)
Net income (in Dollars per share)	$0.36	$0.50	$0.77		$0.96
Diluted:	'	'	'		'
Income from continuing operations (in Dollars per share)	$0.37	$0.50	$0.93		$0.97
Loss from discontinued operations (in Dollars per share)	($0.01)	($0.01)	($0.17)		($0.02)
Net income (in Dollars per share)	$0.36	$0.49	$0.76		$0.95
[1]	Includes the financial data of Insituform-Germany through the date of its sale in June 2013.

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Net income	$14,065		$20,735		$30,821		$39,823
Other comprehensive income:	'		'		'		'
Currency translation adjustments	-1,093		4,708		-11,447		4,432
Pension activity, net of tax	8		-8		16		-10
Deferred loss on hedging activity, net of tax	-484	[1]	-86	[1]	-333	[1]	-220	[1]
Total comprehensive income	12,496		25,349		19,057		44,025
Less: comprehensive income attributable to noncontrolling interests	-290		-1,533		-840		-2,393
Comprehensive income attributable to Aegion Corporation	$12,206		$23,816		$18,217		$41,632
[1]	Amounts presented net of tax of $345 and $56 for the quarters ended September 30, 2013 and 2012, respectively, and $219 and $143 for the nine months ended September 30, 2013 and 2012, respectively.

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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Deferred loss on hedging activity, tax	$345	$56	$219	$143

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$126,687	$133,676
Restricted cash	523	382
Receivables, net	238,585	232,854
Retainage	31,392	30,172
Costs and estimated earnings in excess of billings	93,443	67,740
Inventories	61,764	59,123
Prepaid expenses and other current assets	32,724	27,728
Current assets of discontinued operations	12,365	8,986
Total current assets	597,483	560,661
Property, plant & equipment, less accumulated depreciation	187,294	183,163
Other assets	'	'
Goodwill	334,416	272,294
Identified intangible assets, less accumulated amortization	212,506	159,629
Investments	10,920	19,181
Deferred income tax assets	7,731	7,989
Other assets	13,241	8,153
Total other assets	578,814	467,246
Non-current assets of discontinued operations	1,242	6,824
Total Assets	1,364,833	1,217,894
Current liabilities	'	'
Accounts payable	85,091	74,724
Accrued expenses	88,393	79,580
Billings in excess of costs and estimated earnings	24,953	31,552
Current maturities of long-term debt and line of credit	26,879	33,775
Current liabilities of discontinued operations	2,401	4,885
Total current liabilities	227,717	224,516
Long-term debt, less current maturities	366,469	221,848
Deferred income tax liabilities	37,140	39,790
Other non-current liabilities	11,354	15,620
Total liabilities	642,680	501,774
(See Commitments and Contingencies: Note 7)	'	'
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 38,576,118 and 38,952,561, respectively	386	390
Additional paid-in capital	244,189	257,209
Retained earnings	456,319	426,457
Accumulated other comprehensive income	3,615	15,260
Total stockholders’ equity	704,509	699,316
Non-controlling interests	17,644	16,804
Total equity	722,153	716,120
Total Liabilities and Equity	$1,364,833	$1,217,894

Consolidated_Balance_Sheets_Un1

Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
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)	38,576,118	38,952,561
Common stock, shares outstanding (in Shares)	38,576,118	38,952,561

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

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, 2011

$648,989

$394

$260,680

$373,796

$5,862

$8,257

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Dec. 31, 2011

39,352,375

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income

37,766

0

0

37,766

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income

2,057

'

'

'

'

2,057

'

'

'

'

'

'

'

'

'

'

'

'

Net income

39,823

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock upon stock option exercises including tax benefit

563

1

562

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock upon stock option exercises including tax benefit (in Shares)

26,776

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted shares issued

'

'

'

'

'

'

3

3

0

0

0

0

0

0

0

0

0

0

Restricted shares issued (in Shares)

'

'

'

'

'

'

266,715

'

'

'

'

'

14,446

'

'

'

'

'

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

34,132

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeitures of restricted shares (in Shares)

-30,599

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired

-6,354

-5

-6,349

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Shares repurchased and retired (in Shares)

-384,890

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity-based compensation expense

5,246

0

5,246

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Investment by non-controlling interests

4,939

0

0

0

0

4,939

'

'

'

'

'

'

'

'

'

'

'

'

Currency translation adjustment and derivative transactions, net

4,202

0

0

0

3,866

336

'

'

'

'

'

'

'

'

'

'

'

'

Balance at Sep. 30, 2012

697,411

393

260,139

411,562

9,728

15,589

'

'

'

'

'

'

'

'

'

'

'

'

Balance (in Shares) at Sep. 30, 2012

39,278,955

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income

29,862

0

0

29,862

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income

959

'

'

'

'

959

'

'

'

'

'

'

'

'

'

'

'

'

Net income

30,821

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock upon stock option exercises including tax benefit

899

0

899

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock upon stock option exercises including tax benefit (in Shares)

29,511

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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 (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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Cash flows from operating activities:	'		'
Net income	$30,821		$39,823
Loss from discontinued operations	6,456		880
Income from continuing operations	37,277		40,703
Adjustments to reconcile to net cash provided by operating activities:	'		'
Depreciation and amortization	29,126		28,743
Gain on sale of fixed assets	-815		-246
Equity-based compensation expense	5,090		5,246
Deferred income taxes	-1,523		-1,800
Equity in earnings of affiliated companies	-3,903	[1]	-4,389
Debt Issuance Cost	1,964		0
Earnout reversal	-2,844		-6,892
Gain on sale of interests in German joint venture	-11,771		0
Loss on foreign currency transactions	1,700		138
Other	-159		-913
Changes in operating assets and liabilities (net of acquisitions):	'		'
Restricted cash	-142		-359
Return on equity of affiliated companies	4,027		5,002
Receivables net, retainage and costs and estimated earnings in excess of billings	-11,144		3,760
Inventories	-3,416		-6,333
Prepaid expenses and other assets	-5,044		-2,624
Accounts payable and accrued expenses	2,932		-3,980
Other operating	198		1,773
Net cash provided by operating activities of continuing operations	41,553		57,829
Net cash provided by (used in) operating activities of discontinued operations	-10,179		863
Net cash provided by operating activities	31,374		58,692
Cash flows from investing activities:	'		'
Capital expenditures	-20,079		-33,710
Proceeds from sale of fixed assets	1,856		3,399
Patent expenditures	-469		-420
Sale of interests in German joint venture	18,300		0
Net cash used in investing activities of continuing operations	-144,155		-72,678
Net cash provided by (used in) investing activities of discontinued operations	774		-1,002
Net cash used in investing activities	-143,381		-73,680
Cash flows from financing activities:	'		'
Proceeds from issuance of common stock upon stock option exercises, including tax effects	903		840
Repurchase of common stock	-19,017		-6,354
Investments from noncontrolling interests	0		4,939
Payment of earnout related to acquistion of CRTS, Inc.	-2,112		0
Credit facility financing fees	-5,013		0
Proceeds on notes payable	1,541		5,608
Principal payments on notes payable	0		-890
Proceeds from line of credit	0		26,000
Proceeds from long-term debt	385,500		983
Principal payments on long-term debt	-249,125		-18,750
Net cash provided by financing activities	112,677		12,376
Effect of exchange rate changes on cash	-7,659		-2,203
Net decrease in cash and cash equivalents for the period	-6,989		-4,815
Cash and cash equivalents, beginning of period	133,676		106,129
Cash and cash equivalents, end of period	126,687		101,314
Brinderson LP [Member]	'		'
Cash flows from investing activities:	'		'
Purchase of business, net of cash acquired	-143,763		0
Fyfe LA [Member]	'		'
Cash flows from investing activities:	'		'
Purchase of business, net of cash acquired	0		-3,048
Fyfe Asia [Member]	'		'
Cash flows from investing activities:	'		'
Purchase of business, net of cash acquired	0		-39,415
Hockway [Member]	'		'
Cash flows from investing activities:	'		'
Purchase of business, net of cash acquired	0		1,048
Fyfe NA [Member]	'		'
Cash flows from investing activities:	'		'
Purchase of business, net of cash acquired	$0		($532)
[1]	Includes the financial data of Insituform-Germany through the date of its sale in June 2013.

Note_1_General

Note 1 - General	9 Months Ended
	Sep. 30, 2013
General [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	GENERAL
	The accompanying unaudited consolidated financial statements of Aegion Corporation and its subsidiaries (collectively, “Aegion” or the “Company”) reflect all adjustments (consisting only of normal recurring adjustments) that are, in the opinion of management, necessary for a fair statement of the Company’s financial position as of September 30, 2013 and the results of operations and statements of comprehensive income for the quarters and nine-month periods ended September 30, 2013 and 2012 and the statements of equity and cash flows for the nine-month periods ended September 30, 2013 and 2012. 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 2012 Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 27, 2013. Additionally, certain prior year amounts have been reclassified to conform to the current year presentation.
	The results of operations for the quarter and nine-month period ended September 30, 2013 are not necessarily indicative of the results to be expected for the full year.
	Acquisitions/Strategic Initiatives/Divestitures
	Energy and Mining Segment
	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”). The cash purchase price at closing was $147.6 million (subject to working capital adjustments) and funded by borrowings under the Company’s new $650.0 million senior secured credit facility as discussed in Note 5 of this report. Brinderson is a leading integrated service provider of maintenance, construction, engineering and turnaround activities for the upstream and downstream oil and gas markets. Primarily focused on serving large oil and gas customers in California, Brinderson’s competitive advantages include its industry-leading safety record, a strong reputation for reliability and quality and comprehensive solutions needed for upstream oil field and downstream major refinery maintenance, repairs and retrofits. These core competencies position Brinderson to meet the growing demand for non-discretionary operating and maintenance expenditures.
	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 initiatives. 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 10 of this report. 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.
	In June 2011, the Company acquired all of the outstanding stock of CRTS, Inc. (“CRTS”). The purchase price at closing included a provision whereby CRTS shareholders would able to earn up to an additional $15.0 million upon the achievement of certain performance targets over the three-year period ending December 31, 2013 (the “CRTS earnout”). During the third quarter of 2013 and 2012, the Company reversed $2.8 million and $5.9 million, respectively, related to the CRTS earnout. In each year, operating results have been below the target amounts in the purchase agreement. As of September 30, 2013, the Company calculated the fair value of the contingent consideration arrangement to be $1.1 million, which is based on Level 3 inputs as defined in Note 10 of this report.
	In March 2012, the Company organized United Special Technical Services LLC (“USTS”), a joint venture located in the Sultanate of Oman between United Pipeline Systems and Special Technical Services LLC, an Omani company (“STS”), for the purpose of executing pipeline, piping and of flow line high-density polyethylene lining services throughout the Middle East and Northern Africa. The Company holds a fifty-one percent (51%) equity interest in USTS and STS holds the remaining forty-nine percent (49%) equity interest. USTS initiated operations in the second quarter of 2012.
	Starting in February 2014, and solely during the month of January in each calendar year thereafter, the Company’s equity partner in Bayou Coating, L.L.C. (“Bayou Coating”), Stupp Brothers Inc. (“Stupp”), has the option to acquire: (i) the assets of Bayou Coating at book value as of the end of the prior fiscal year, or (ii) the Company’s equity interests in Bayou Coating at forty-nine percent (49%) of the book value of Bayou Coating, as of the end of the prior fiscal year, with such book value to be determined on the basis of Bayou Coating’s federal information tax return for such fiscal year. During 2013, the Company received an indication from Stupp that it intends to exercise the equity interest option in January 2014. In connection with this indication, in the second quarter of 2013, 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 Company’s 2009 acquisition of The Bayou Companies, LLC (“Bayou”). The non-cash charge represents the Company’s current estimate of the difference between the carrying value of the investment on the Company’s balance sheet and the amount the Company may receive in connection with the exercise. The Company is currently evaluating and gathering more information regarding additional potential financial impacts associated with the exercise of this option. The Company does not expect any additional material impacts to its consolidated balance sheet related to Stupp’s exercise of this option.
	Water and Wastewater Segment
	In June 2013, the Company sold its fifty percent (50%) interest in Insituform Rohrsanierungstechniken GmbH (“Insituform-Germany”), held through its indirect subsidiary, Insituform Technologies Limited (UK), 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 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) recorded in other income (expense) on the consolidated statement of operations. 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.
	Commercial and Structural Segment
	In April 2012, the Company purchased Fyfe Group LLC’s Asian operations (“Fyfe Asia”), which included all of the equity interests of Fyfe Asia Pte. Ltd, a Singaporean entity (and its interest in two joint ventures located in Borneo and Indonesia), Fyfe (Hong Kong) Limited, Fibrwrap Construction (M) Sdn Bhd, a Malaysian entity, Fyfe Japan Co. Ltd and Fibrwrap Construction Pte. Ltd and Technologies & Art Pte. Ltd., Singaporean entities. Customers in India and China will be served through an exclusive product supply and license agreement. Fyfe Asia provides Fibrwrap® installation services throughout Asia, as well as provides product and engineering support to installers and applicators of fiber reinforced polymer systems in Asia. The cash purchase price at closing was $40.7 million. The purchase price was funded out of the Company’s cash balances and by borrowing $18.0 million against the Company’s line of credit.
	In January 2012, the Company purchased Fyfe Group LLC’s Latin American operations (“Fyfe LA”), which included all of the equity interests of Fyfe Latin America S.A., a Panamanian entity (and its interest in various joint ventures located in Peru, Costa Rica, Chile and Colombia), Fyfe – Latin America S.A. de C.V., an El Salvadorian entity, and Fibrwrap Construction Latin America S.A., a Panamanian entity. Fyfe LA provides Fibrwrap® installation services throughout Latin America, as well as product and engineering support to installers and applicators of fiber reinforced polymer systems in Latin America. The cash purchase price at closing was $2.3 million and funded out of the Company’s cash balances. During the first quarter of 2012, the Company paid the sellers an additional $1.1 million based on a preliminary working capital adjustment. An annual payout can be earned based on the achievement of certain performance targets in each year over the three-year period ending December 31, 2014. No annual payout has been earned to date as the performance targets have not been met. As of September 30, 2013, the Company calculated the fair value of the contingent consideration arrangement to be $0.3 million, which is based on Level 3 inputs as defined in Note 10 of this report.
	Purchase Price Accounting
	The Company accounts for its acquisitions in accordance with FASB ASC 805, Business Combinations. The Company records finite-lived intangible assets at their determined fair value related to customer relationships, backlog, trade names and trademarks and patents and other acquired technologies. The acquisitions generally result in goodwill related to, among other things, growth opportunities and synergies. The goodwill associated with the Brinderson acquisition is deductible for tax purposes. The Company completed its accounting for Fyfe LA and Fyfe Asia during the quarters ended December 31, 2012 and March 31, 2013, respectively. During the third quarter of 2013, the Company included its preliminary accounting for Brinderson.
	The Fyfe LA, Fyfe Asia and Brinderson acquisitions made the following contributions to the Company’s revenues and profits during the quarters and nine months ended September 30, 2013 and 2012 (in thousands):
		Quarters Ended								Quarters Ended
		30-Sep-13								30-Sep-12
		Brinderson				Fyfe Asia/				Brinderson				Fyfe Asia/
						Fyfe LA								Fyfe LA
	Revenues	$	47,948			$	4,574			$	—			$	3,985
	Net income (1)	1,225				149				—				179
		Nine Months Ended								Nine Months Ended
		30-Sep-13								30-Sep-12
		Brinderson				Fyfe Asia/				Brinderson				Fyfe Asia/
						Fyfe LA								Fyfe LA
	Revenues	$	47,948			$	12,530			$	—			$	8,457
	Net income (1)	1,225				519				—				135
	_____________________
	(1)	Net income includes an allocation of corporate expenses that is not necessarily an indication of the entity’s operations on a stand alone basis.
	The following unaudited pro forma summary presents combined information of the Company as if the Fyfe LA, Fyfe Asia and Brinderson acquisitions had occurred on January 1, 2012 (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2013		2012				2013				2012
	Revenues	n/a (1)		$	316,984			$	885,842			$	905,282
	Net income (2)	n/a (1)		22,401				40,889				44,758
	_____________________
	(1)	Amounts are presented in the unaudited consolidated statement of operations for the quarter ended September 30, 2013.
	(2)	Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded as of January 1 of the year preceding the respective acquisition date.
	Total cash consideration recorded to acquire Fyfe Asia was $40.1 million. This amount included purchase price at closing of $40.7 million less a final working capital adjustment of $0.6 million. Total cash consideration recorded to acquire Brinderson at its acquisition date was $147.6 million (subject to working capital adjustments).
	The following table summarizes the fair value of identified assets and liabilities of the Brinderson and Fyfe Asia acquisitions at their respective acquisition dates (in thousands):
		Brinderson				Fyfe Asia
	Cash	$	3,842			$	1,303
	Receivables and cost and estimated earnings in excess of billings	28,353				9,022
	Prepaid expenses and other current assets	655				1,262
	Property, plant and equipment	6,848				938
	Identified intangible assets	60,210				14,130
	Other assets	1,071				—
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	(16,072		)		(4,109		)
	Deferred tax liabilities	—				(2,410		)
	Total identifiable net assets	$	84,907			$	20,136
	Total consideration recorded	147,605				40,144
	Less: total identifiable net assets	84,907				20,136
	Goodwill at September 30, 2013	$	62,698			$	20,008
	The following adjustments were made during the first quarter of 2013 relative to the acquisition of Fyfe Asia as the Company finalized its purchase price accounting (in thousands):
	Total identifiable net assets at December 31, 2012	$	20,342
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	206
	Total identifiable net assets at September 30, 2013	$	20,136
	Goodwill at December 31, 2012	$	19,802
	Increase in goodwill related to acquisition	206
	Goodwill at September 30, 2013	$	20,008

Note_2_Accounting_Policies

Note 2 - Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	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. During the first nine months of 2013, the Company recorded revenue related to claims in its discontinued operations, which has been determined to be probable and reasonably estimated. The amount of this revenue is immaterial to the Company’s consolidated financial statements. 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. 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. 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.
	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.
	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, 2013 and 2012, the Company had $2.1 million and $8.5 million, respectively, related to currency translation adjustments, $1.3 million and $0.9 million, respectively, related to derivative transactions and $0.2 million and $0.3 million, respectively, related to pension activity in accumulated other comprehensive income.
	Investments in Affiliated Companies
	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 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) recorded in other income (expense) on the consolidated statement of operations. 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.
	The Company, through its subsidiary, Insituform Technologies Netherlands BV, owns a forty-nine percent (49%) equity interest in WCU Corrosion Technologies Pte. Ltd. (“WCU”). WCU offers the Company’s Tite Liner® process in the oil and gas sector and onshore corrosion services in Asia and Australia.
	The Company, through its subsidiary, The Bayou Companies, LLC, owns a forty-nine percent (49%) equity interest in Bayou Coating. Bayou Coating provides pipe coating services from its facility in Baton Rouge, Louisiana, and is adjacent to and services the Stupp pipe mill in Baton Rouge.
	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 September 30, 2013 and December 31, 2012, the investments in affiliated companies on the Company’s consolidated balance sheets were $10.9 million and $19.2 million, respectively.
	Net income presented below for the nine-month periods ended September 30, 2013 and 2012 includes Bayou Coating’s forty-one percent (41%) interest in Delta Double Jointing, LLC (“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 are summarized in the following table (in thousands):
		Nine Months Ended September 30,
	Income statement data	2013 (1)		2012
	Revenue	$	75,986	$	102,407
	Gross profit	21,753		28,620
	Net income	13,624		15,382
	Equity in earnings of affiliated companies	3,903		4,389
	_____________________
	(1)    Includes the financial data of Insituform-Germany through the date of 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, 2013, the Company consolidated any VIEs in which it was the primary beneficiary. Also, as of September 30, 2013, the Company had significant interests in certain VIEs primarily through its joint venture arrangements for which the Company was not the primary beneficiary. There have been no changes in the status of the Company’s VIE or primary beneficiary designations during 2013.
	Financial data for consolidated variable interest entities are summarized in the following table (in thousands):
	Balance sheet data	30-Sep-13		December 31, 2012
	Current assets	$	52,896	$	65,251
	Non-current assets	52,264		47,086
	Current liabilities	37,162		45,604
	Non-current liabilities	22,326		23,169
		Nine Months Ended September 30,
	Income statement data	2013		2012
	Revenue	$	62,650	$	74,313
	Gross profit	10,179		11,361
	Net income	2,040		1,391
	The Company’s non-consolidated variable interest entities are accounted for using the equity method of accounting and discussed further under “Investments in Affiliated Companies” above.
	Newly Adopted Accounting Pronouncements
	ASU No. 2013-1 updates standard ASU No. 2011-11 and provides guidance to implement the balance sheet offsetting disclosures that require the presentation of gross and net information about transactions that are (1) offset in the financial statements or (2) subject to an enforceable master netting arrangement or similar agreement, regardless of whether the transactions are actually offset in the statement of financial position. The disclosure requirements are effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. Refer to Note 10 for discussion of the new accounting pronouncement.
	ASU No. 2013-2 generally provides guidance to improve the reporting of reclassifications out of accumulated other comprehensive income to various components in the income statement. This standard requires an entity to present either parenthetically on the face of the financial statements or in the notes, significant amounts reclassified from each component of accumulated other comprehensive income and the income statement line items affected by the reclassification. ASU 2013-2 was effective for fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company evaluated this pronouncement effective January 1, 2013 and determined reclassifications out of accumulated other comprehensive income to various components in the income statement is immaterial to the financial statements to the Company. Refer to Note 10 for discussion of the new accounting pronouncement.

Note_3_Share_Information

Note 3 - Share Information	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	SHARE INFORMATION
	Earnings per share have been calculated using the following share information:
		Quarters Ended		Nine Months Ended September 30,
		September 30,
		2013	2012	2013	2012
	Weighted average number of common shares used for basic EPS	38,672,441	39,285,484	38,836,276	39,253,373
	Effect of dilutive stock options and restricted and deferred stock unit awards	398,932	319,745	392,349	306,241
	Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	39,071,373	39,605,229	39,228,625	39,559,614
	The Company excluded 159,639 and 252,348 stock options for the quarters ended September 30, 2013 and 2012, respectively, and 159,639 and 252,348 stock options for the nine-month periods ended September 30, 2013 and 2012, 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, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets Disclosure [Text Block]	'
	GOODWILL AND INTANGIBLE ASSETS
	Goodwill
	The following table presents a reconciliation of the beginning and ending balances of the Company’s goodwill at January 1, 2013 and September 30, 2013 (in millions):
		Energy				North American				International				Commercial				Total
		and				Water and				Water and				and Structural (3)
		Mining (1)(2)				Wastewater				Wastewater
	Beginning balance at January 1, 2013	$	76.7			$	101.9			$	28.1			$	65.6			$	272.3
	Additions to goodwill through acquisitions	62.7				—				—				0.2				62.9
	Foreign currency translation	(0.4		)		0.9				(1.0		)		(0.3		)		(0.8		)
	Goodwill at end of period (4)	$	139			$	102.8			$	27.1			$	65.5			$	334.4
	__________________________
	(1)	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $1.4 million of goodwill associated with BWW, which operation now is reported as discontinued. Consequently, the goodwill associated with BWW is no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.
	(2)	During 2013, the Company recorded an increase of goodwill of $62.7 million related to the Brinderson acquisition.
	(3)	During 2013, the Company recorded an increase of goodwill of $0.2 million related to the Fyfe Asia acquisition.
	(4)	The Company does not have any accumulated impairment charges.
	Intangible Assets
	Intangible assets at September 30, 2013 and December 31, 2012 were as follows (in thousands):
		As of September 30, 2013 (1)(2)														As of December 31, 2012
		Weighted Average Useful Lives (Years)		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Gross Carrying Amount				Accumulated Amortization			Net Carrying Amount
	License agreements	7		$	3,921			$	(2,945	)		$	976			$	3,925			$	(2,821	)	$	1,104
	Backlog	0		4,749				(4,749		)		—				4,756				(4,756		)	—
	Leases	13		2,073				(436		)		1,637				2,067				(331		)	1,736
	Trademarks	17		21,362				(4,091		)		17,271				21,290				(3,317		)	17,972
	Non-competes	5		1,140				(731		)		409				710				(710		)	—
	Customer relationships	14		182,774				(25,133		)		157,641				123,301				(18,912		)	104,389
	Patents and acquired technology	18		59,890				(25,318		)		34,572				55,672				(21,244		)	34,428
				$	275,909			$	(63,403	)		$	212,506			$	211,721			$	(52,091	)	$	159,629
	__________________________
	-1	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $2.5 million of intangible assets associated with BWW, which operation now is reported as discontinued. Consequently, the intangible assets and accumulated amortization associated with BWW are no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.
	-2	During the third quarter of 2013, the Company recorded $59.8 million in customer relationships to be amortized over a weighted average life of 15 years and $0.4 million in non-compete agreements to be amortized over a weighted average life of 5 years related to the acquisition of Brinderson, as discussion in Note 1 of this report.
	Amortization expense was $3.6 million and $2.6 million for each of the quarters ended September 30, 2013 and 2012, respectively, and $8.8 million and $8.1 million for the nine-month periods ended September 30, 2013 and 2012, respectively. Estimated amortization expense by year is as follows (in thousands):
	2013		$	12,476
	2014		14,583
	2015		14,590
	2016		14,564
	2017		14,543

Note_5_LongTerm_Debt_and_Credi

Note 5 - Long-Term Debt and Credit Facility	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure [Text Block]	'
	LONG-TERM DEBT AND CREDIT FACILITY
	Financing Arrangements
	In July 2013, in connection with the Brinderson acquisition, the Company entered into a new $650.0 million senior secured credit facility (the “New 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 new credit facility. The New 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 New 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., 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 New Credit Facility and the Brinderson acquisition. Additionally, the Company used $7.0 million of its cash on hand to fund these transactions. This New Credit Facility replaced the Company’s $500.0 million credit facility entered into on August 31, 2011 (the “Old Credit Facility”).
	Generally, interest will be charged on the principal amounts outstanding under the New 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, 2013 was approximately 2.21%.
	The Company’s total indebtedness at September 30, 2013 consisted of $345.6 million outstanding from the $350.0 million term loan under the New Credit Facility, $35.5 million on the line of credit under the New Credit Facility and $0.3 million of third party notes and bank debt. Additionally, the Company and Wasco Coatings UK Ltd. (“Wasco Energy”), a subsidiary of Wah Seong Corporation, 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, of which $6.9 million (representing funds loaned by Wasco Energy) was designated in the consolidated financial statements as third-party debt. 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, $5.0 million was designated in the Company’s consolidated financial statements as third-party debt at September 30, 2013.
	As of September 30, 2013, the Company had $18.7 million in letters of credit issued and outstanding under the New Credit Facility. Of such amount, $10.4 million was collateral for the benefit of certain of our insurance carriers and $8.3 million was for letters of credit or bank guarantees of performance or payment obligations of foreign subsidiaries.
	The Company’s total indebtedness at December 31, 2012 consisted of $218.8 million outstanding from an original $250 million term loan under the Old Credit Facility, $26.0 million on the line of credit under the Old Credit Facility and $0.1 million of third party notes and bank debt. Additionally, the Company and Wasco Energy loaned Bayou Wasco $11.0 million for the purchase of capital assets in 2012, of which $5.5 million (representing funds loaned by Wasco Energy) was designated in the consolidated financial statements as third-party debt. In connection with the formation of 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. As of December 31, 2012, $4.1 million of the additional $6.2 million had been funded. As of December 31, 2012, $5.2 million of such total amount (representing funds loaned by Perma-Pipe Canada Inc.) was designated in the consolidated financial statements as third-party debt.
	At September 30, 2013 and December 31, 2012, the estimated fair value of the Company’s long-term debt was approximately $385.8 million and $253.6 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 10 of this report.
	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 New 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 New 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 New Credit Facility is subject to certain financial covenants, including a consolidated financial leverage ratio and consolidated fixed charge coverage ratio. Subject to the specifically defined terms and methods of calculation as set forth in the New Credit Facility’s credit agreement, the financial covenant requirements, as of each quarterly reporting period end, are defined as follows:
	•	Consolidated financial leverage ratio compares consolidated funded indebtedness to New Credit Facility defined income. The initial maximum amount was not to initially exceed 3.75 to 1.00 and will decrease periodically at scheduled reporting periods to not more that 3.50 to 1.00 beginning with the quarter ending June 30, 2014. At September 30, 2013, the Company’s consolidated financial leverage ratio was 2.64 to 1.00 and, using the New Credit Facility defined income, the Company had the capacity to borrow up to approximately $163.6 million of additional debt.
	•	Consolidated fixed charge coverage ratio compares New Credit Facility defined income to New Credit Facility defined fixed charges with a minimum permitted ratio of not less than 1.25 to 1.00. At September 30, 2013, the Company’s fixed charge ratio was 1.85 to 1.00.
	At September 30, 2013, the Company was in compliance with all of its debt and financial covenants as required under the New Credit Facility.

Note_6_Stockholders_Equity_and

Note 6 - Stockholders' Equity and Equity Compensation	9 Months Ended
	Sep. 30, 2013
Shareholders' Equity and Share-based Payments [Abstract]	'
Shareholders' Equity and Share-based Payments [Text Block]	'
	STOCKHOLDERS’ EQUITY AND EQUITY COMPENSATION
	Share Repurchase Plan
	In December 2012, the Company’s Board of Directors authorized the repurchase of up to $5.0 million of the Company’s common stock to be made during 2013. This amount represented the then maximum open market repurchases authorized in any calendar year under the terms of the Old Credit Facility. In May 2013, prior to the Company entering into the New Credit Facility, the Company’s Board of Directors authorized the repurchase of up to an additional $10.0 million of the Company’s common stock to be made during the balance of the 2013 calendar year. The Company simultaneously executed an amendment to the Old Credit Facility to allow for this additional repurchase. In September 2013, after the Company entered into the New Credit Facility, the Company’s Board of Directors authorized the repurchase of up to an additional $10.0 million of the Company’s common stock to be made during the balance of the 2013 calendar year. This amount represented half of the potential maximum open market repurchases authorized in any calendar year under the terms of the New Credit Facility given the covenants currently applicable to the Company. Once repurchased, the Company immediately retires the shares.
	In addition to the open market repurchases, the Company also is authorized to purchase up to $10.0 million 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.
	During the first nine months of 2013, the Company acquired 782,260 shares of the Company’s common stock for $17.8 million ($22.79 average price per share) through the three open market repurchase programs discussed above and 51,292 shares of the Company’s common stock for $1.2 million ($23.32 average price per share) in connection with the satisfaction of tax obligations in connection with the vesting of restricted stock, exercise of stock options and distribution of deferred stock units. Once repurchased, the Company immediately retired all such shares.
	Equity-Based Compensation Plans
	At September 30, 2013, 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, 2013, 2,840,257 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, 2013, 168,390 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.
	A summary of stock award activity during the nine-month period ended September 30, 2013 follows:
		Stock Awards			Weighted
					Average
					Award Date
					Fair Value
	Outstanding at January 1, 2013	701,918			$	19.42
	Restricted shares awarded	431,877			24.09
	Restricted stock units awarded	112,401			25.11
	Restricted shares distributed	(274,028	)		19.03
	Restricted stock units distributed	(11,112	)		20.7
	Restricted shares forfeited	(20,704	)		21.41
	Restricted stock units forfeited	(54,481	)		20.38
	Outstanding at September 30, 2013	885,871			$	22.42
	Expense associated with stock awards was $2.8 million and $3.0 million in the nine months ended September 30, 2013 and 2012, respectively. Unrecognized pre-tax expense of $10.1 million related to stock awards is expected to be recognized over the weighted average remaining service period of 2.1 years for awards outstanding at September 30, 2013.
	Expense associated with stock awards was $0.8 million for each of the quarters ended September 30, 2013 and 2012.
	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.
	A summary of deferred stock unit activity during the nine-month period ended September 30, 2013 follows:
		Deferred			Weighted
		Stock			Average
		Units			Award Date
					Fair Value
	Outstanding at January 1, 2013	181,518			$	19.06
	Awarded	39,876			22.33
	Shares distributed	(5,313	)		22.67
	Forfeited	(714	)		24
	Outstanding at September 30, 2013	215,367			$	19.56
	There was no expense associated with awards of deferred stock units for the quarters ended September 30, 2013 and 2012. Expense associated with awards of deferred stock units for the nine months ended September 30, 2013 and 2012 was $0.9 million and $0.7 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.
	A summary of stock option activity during the nine-month period ended September 30, 2013 follows:
		Shares			Weighted
					Average
					Exercise
					Price
	Outstanding at January 1, 2013	1,223,618			$	18.49
	Granted	29,025			25.11
	Exercised	(29,511	)		20.14
	Canceled/Expired	(7,729	)		24.52
	Outstanding at September 30, 2013	1,215,403			$	18.57
	Exercisable at September 30, 2013	940,317			$	17.89
	Expense associated with stock option grants was $0.4 million and $0.5 million in the quarters ended September 30, 2013 and 2012, respectively. In the nine months ended September 30, 2013 and 2012, the Company recorded expense of $1.4 million and $1.6 million, respectively, related to stock option grants. Unrecognized pre-tax expense of $1.5 million related to stock option grants is expected to be recognized over the weighted average remaining contractual term of 1.5 years for awards outstanding at September 30, 2013.
	Financial data for stock option exercises are summarized in the following table (in thousands):
		Nine Months Ended September 30,
		2013				2012
	Amount collected from stock option exercises	$	738			$	480
	Total intrinsic value of stock option exercises	131				106
	Tax benefit of stock option exercises recorded in additional paid-in-capital	55				17
	Aggregate intrinsic value of outstanding stock options	6,983				3,263
	Aggregate intrinsic value of exercisable stock options	5,962				2,966
	The intrinsic value calculations are based on the Company’s closing stock price of $23.72 and $19.16 on September 30, 2013 and 2012, 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, 2013 and 2012 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,
		2013				2012
	Range		Weighted Average		Range		Weighted Average
Grant-date fair value	$12.92		$12.92		$8.14 - $8.19		$8.19
Volatility	49.80%		49.80%		43.0% - 45.2%		45.10%
Expected term (years)	7		7		7		7
Dividend yield	—%		—%		—%		—%
Risk-free rate	1.10%		1.10%		1.0% - 1.5%		1.50%

Note_7_Commitments_and_Conting

Note 7 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	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.
	Purchase Commitments
	The Company had no material purchase commitments at September 30, 2013.
	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, 2013 on its consolidated balance sheet.

Note_8_Segment_Reporting

Note 8 - Segment Reporting	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	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 well as by geographic areas. Within the water and wastewater market, the Company operates in two distinct geographies: North America and internationally outside of North America. As such, the Company is organized into four reportable segments: Energy and Mining; North American Water and Wastewater; International Water and Wastewater; and Commercial and Structural. Each segment is regularly reviewed and evaluated separately.
	During the first quarter of 2013, the Company re-organized its Water and Wastewater businesses to bring all of its operations under one central leadership team. The Company hired a Senior Vice President - Global Water and Wastewater and a Vice President of International Water and Wastewater. The Vice President of International Water and Wastewater is responsible for the European Water and Wastewater operations as well as the Asia-Pacific Water and Wastewater operations and reports directly to the Senior Vice President - Global Water and Wastewater. In connection with this management re-organization, the Company combined its European Water and Wastewater and Asia-Pacific Water and Wastewater reportable segments into one reportable segment titled International Water and Wastewater. All future filings will combine these previously reported segments into one.
	During the third quarter of 2013, the Company acquired Brinderson. Brinderson is a leading integrated service provider of maintenance, construction, engineering and turnaround activities for the upstream and downstream oil and gas markets. For reportable segment purposes, management reports Brinderson in the Company’s Energy and Mining segment.
	The quarter and nine months ended September 30, 2013 results include $2.3 million and $4.2 million, respectively, for costs incurred related to the Company’s acquisition of Brinderson and other acquisition targets the Company is no longer pursuing. The quarter and nine months ended September 30, 2012 results include $0.6 million and $2.6 million, respectively, for costs incurred related to the acquisitions of Fyfe LA and Fyfe Asia. The Company recorded these costs under “Acquisition-related expenses” on its consolidated statements of operations.
	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,
		2013			2012			2013			2012
	Revenues:
	Energy and Mining	$	168,708		$	137,386		$	385,991		$	377,610
	North American Water and Wastewater	95,997			77,818			261,616			231,647
	International Water and Wastewater	26,152			27,766			80,064			80,712
	Commercial and Structural	16,808			19,897			48,070			55,267
	Total revenues	$	307,665		$	262,867		$	775,741		$	745,236
	Gross profit:
	Energy and Mining	$	37,118		$	33,710		$	87,678		$	93,466
	North American Water and Wastewater	21,357			17,183			55,786			48,850
	International Water and Wastewater	5,116			2,890			15,424			9,603
	Commercial and Structural	5,820			9,148			17,228			25,803
	Total gross profit	$	69,411		$	62,931		$	176,116		$	177,722
	Operating income (loss):
	Energy and Mining	$	12,874		$	21,426		$	24,481		$	42,902
	North American Water and Wastewater	10,328			6,289			23,010			16,361
	International Water and Wastewater	(257		)	(3,195		)	(1,338		)	(7,542		)
	Commercial and Structural	(913		)	2,345			(1,480		)	4,985
	Total operating income	$	22,032		$	26,865		$	44,673		$	56,706
	The following table summarizes revenues, gross profit and operating income (loss) by geographic region (in thousands):
		Quarters Ended						Nine Months Ended September 30,
		September 30,
		2013			2012			2013			2012
	Revenues:
	United States	$	202,353		$	162,427		$	496,544		$	472,059
	Canada	56,026			47,141			131,172			130,900
	Europe	20,605			21,455			65,592			62,398
	Other foreign	28,681			31,844			82,433			79,879
	Total revenues	$	307,665		$	262,867		$	775,741		$	745,236
	Gross profit:
	United States	$	43,838		$	40,375		$	111,006		$	121,487
	Canada	14,351			13,352			31,753			33,995
	Europe	4,769			5,332			15,453			15,107
	Other foreign	6,453			3,872			17,904			7,133
	Total gross profit	$	69,411		$	62,931		$	176,116		$	177,722
	Operating income (loss):
	United States	$	8,941		$	16,422		$	16,067		$	35,552
	Canada	10,397			9,069			20,622			20,928
	Europe	1,106			1,691			3,928			3,789
	Other foreign	1,588			(317		)	4,056			(3,563		)
	Total operating income	$	22,032		$	26,865		$	44,673		$	56,706

Note_9_Discontinued_Operations

Note 9 - Discontinued Operations	9 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	'
	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 initiatives. 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 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 10 of this report. 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.
	The discontinuation of BWW signified a triggering event for the Bayou reporting unit goodwill. The Company updated its analysis of the Bayou reporting unit as of the date of discontinuation. In its previous Bayou reporting unit analysis on October 1, 2012, the Company tested the Bayou reporting unit as a whole, which included the carrying value and future cash flows associated with the BWW business. In the updated analysis associated with this triggering event, the Company removed any carrying value associated with BWW (as it was tested separately) and updated its income projections to reflect the removal of BWW and the current future cash flows of the Bayou reporting unit. Additionally, the Company updated the data points associated with the market approach. In this analysis, it was determined that the Bayou reporting unit did not result in an impairment at the date of discontinuation.
	Operating results for discontinued operations are summarized as follows (in thousands):
		Quarters Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Revenues	$	744		$	2,288		$	8,864		$	8,045
	Gross profit (loss)	(837		)	(157		)	(4,077		)	164
	Operating expenses	210			556			1,828			1,466
	Closure charges of welding business	—			—			5,019			—
	Operating loss	(1,047		)	(723		)	(10,924		)	(1,302		)
	Loss before tax benefits	(1,047		)	(741		)	(10,742		)	(1,500		)
	Tax benefits	489			306			4,286			620
	Net loss	(558		)	(435		)	(6,456		)	(880		)
	Balance sheet data for discontinued operations was as follows (in thousands):
		30-Sep-13			December 31, 2012
	Restricted cash	$	1,193		$	1,192
	Receivables, net	9,552			4,380
	Costs and estimated earnings in excess of billings	1,543			2,775
	Inventories	—			386
	Prepaid expenses and other current assets	77			253
	Property, plant and equipment, less accumulated depreciation	1,242			2,803
	Other assets	—			4,021
	Total assets	$	13,607		$	15,810
	Accounts payable	$	1,644		$	3,225
	Accrued expenses	757			1,660
	Total liabilities	$	2,401		$	4,885

Note_10_Derivative_Financial_I

Note 10 - Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments and Hedging Activities Disclosure [Text Block]	'
	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 and nine months ended September 30, 2013 and 2012, 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, 2013, the Company recorded a net deferred gain of $0.1 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 New 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 New 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,
					2013				2012
	Derivatives Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	11			$	—
			Total Assets		$	11			$	—
	Forward Currency Contracts		Accrued expenses		$	—			$	9
	Interest Rate Swaps		Other non-current liabilities		1,336				764
			Total Liabilities		$	1,336			$	773
	Derivatives Not Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	583			$	—
			Total Assets		$	583			$	—
	Forward Currency Contracts		Accrued Expenses		$	—			$	585
			Total Derivative Assets		$	594			$	—
			Total Derivative Liabilities		1,336				1,358
			Total Net Derivative Asset (Liability)		$	742			$	1,358
	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-13				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	594			$	—			$	594	$	—
	Total	$	594			$	—			$	594	$	—
	Liabilities:
	Interest Rate Swap	$	1,336			$	—			$	1,336	$	—
	Total	$	1,336			$	—			$	1,336	$	—
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		31-Dec-12				(Level 1)				(Level 2)		(Level 3)
	Liabilities:
	Forward Currency Contracts	$	594			$	—			$	594	$	—
	Interest Rate Swap	764				—				764		—
	Total	$	1,358			$	—			$	1,358	$	—
	The following table summarizes the Company’s derivative positions at September 30, 2013:
		Position		Notional				Weighted		Average
				Amount				Average		Exchange
								Remaining		Rate
								Maturity
								In Years
	Canadian Dollar/USD	Sell		$	13,001,124			0.2		1.03
	Singapore Dollar/USD	Sell		$	1,979,368			0.2		1.26
	Hong Kong Dollar/USD	Sell		$	1,570,093			0.2		7.75
	Australian Dollar/USD	Sell		$	3,579,286			0.2		0.93
	USD/British Pound	Sell		£	1,900,000			0.7		0.84
	EURO/British Pound	Sell		£	8,000,000			0.9		1.61
	Interest Rate Swap			$	172,812,500			2.8
	The Company had no transfers between Level 1, 2 or 3 inputs during the nine-month period ended September 30, 2013. 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_2_Accounting_Policies_Pol

Note 2 - Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Revenue Recognition, Policy [Policy Text Block]	'
	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. During the first nine months of 2013, the Company recorded revenue related to claims in its discontinued operations, which has been determined to be probable and reasonably estimated. The amount of this revenue is immaterial to the Company’s consolidated financial statements. 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. 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. 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.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	'
	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.
	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.
Equity Method Investments, Policy [Policy Text Block]	'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.
Consolidation, Variable Interest Entity, Policy [Policy Text Block]	'
	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.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	ASU No. 2013-1 updates standard ASU No. 2011-11 and provides guidance to implement the balance sheet offsetting disclosures that require the presentation of gross and net information about transactions that are (1) offset in the financial statements or (2) subject to an enforceable master netting arrangement or similar agreement, regardless of whether the transactions are actually offset in the statement of financial position. The disclosure requirements are effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. Refer to Note 10 for discussion of the new accounting pronouncement.
	ASU No. 2013-2 generally provides guidance to improve the reporting of reclassifications out of accumulated other comprehensive income to various components in the income statement. This standard requires an entity to present either parenthetically on the face of the financial statements or in the notes, significant amounts reclassified from each component of accumulated other comprehensive income and the income statement line items affected by the reclassification. ASU 2013-2 was effective for fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company evaluated this pronouncement effective January 1, 2013 and determined reclassifications out of accumulated other comprehensive income to various components in the income statement is immaterial to the financial statements to the Company. Refer to Note 10 for discussion of the new accounting pronouncement.

Note_1_General_Tables

Note 1 - General (Tables)	9 Months Ended
	Sep. 30, 2013
General [Line Items]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	The following table summarizes the fair value of identified assets and liabilities of the Brinderson and Fyfe Asia acquisitions at their respective acquisition dates (in thousands):
		Brinderson				Fyfe Asia
	Cash	$	3,842			$	1,303
	Receivables and cost and estimated earnings in excess of billings	28,353				9,022
	Prepaid expenses and other current assets	655				1,262
	Property, plant and equipment	6,848				938
	Identified intangible assets	60,210				14,130
	Other assets	1,071				—
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	(16,072		)		(4,109		)
	Deferred tax liabilities	—				(2,410		)
	Total identifiable net assets	$	84,907			$	20,136
	Total consideration recorded	147,605				40,144
	Less: total identifiable net assets	84,907				20,136
	Goodwill at September 30, 2013	$	62,698			$	20,008
Schedule of Purchase Accounting Adjustments [Table Text Block]	'
	The following adjustments were made during the first quarter of 2013 relative to the acquisition of Fyfe Asia as the Company finalized its purchase price accounting (in thousands):
	Total identifiable net assets at December 31, 2012	$	20,342
	Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	206
	Total identifiable net assets at September 30, 2013	$	20,136
	Goodwill at December 31, 2012	$	19,802
	Increase in goodwill related to acquisition	206
	Goodwill at September 30, 2013	$	20,008
Pro Forma [Member]	'
General [Line Items]	'
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The following unaudited pro forma summary presents combined information of the Company as if the Fyfe LA, Fyfe Asia and Brinderson acquisitions had occurred on January 1, 2012 (in thousands):
		Quarters Ended						Nine Months Ended
		September 30,						September 30,
		2013		2012				2013				2012
	Revenues	n/a (1)		$	316,984			$	885,842			$	905,282
	Net income (2)	n/a (1)		22,401				40,889				44,758
	_____________________
	(1)	Amounts are presented in the unaudited consolidated statement of operations for the quarter ended September 30, 2013.
	(2)	Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded as of January 1 of the year preceding the respective acquisition date.
Since Acquisition [Member]	'
General [Line Items]	'
Business Acquisition, Pro Forma Information [Table Text Block]	'
	The Fyfe LA, Fyfe Asia and Brinderson acquisitions made the following contributions to the Company’s revenues and profits during the quarters and nine months ended September 30, 2013 and 2012 (in thousands):
		Quarters Ended								Quarters Ended
		30-Sep-13								30-Sep-12
		Brinderson				Fyfe Asia/				Brinderson				Fyfe Asia/
						Fyfe LA								Fyfe LA
	Revenues	$	47,948			$	4,574			$	—			$	3,985
	Net income (1)	1,225				149				—				179
		Nine Months Ended								Nine Months Ended
		30-Sep-13								30-Sep-12
		Brinderson				Fyfe Asia/				Brinderson				Fyfe Asia/
						Fyfe LA								Fyfe LA
	Revenues	$	47,948			$	12,530			$	—			$	8,457
	Net income (1)	1,225				519				—				135
	_____________________
	(1)	Net income includes an allocation of corporate expenses that is not necessarily an indication of the entity’s operations on a stand alone basis.

Note_2_Accounting_Policies_Tab

Note 2 - Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2013
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	30-Sep-13		December 31, 2012
	Current assets	$	52,896	$	65,251
	Non-current assets	52,264		47,086
	Current liabilities	37,162		45,604
	Non-current liabilities	22,326		23,169
Income Statement [Member]	'
Note 2 - Accounting Policies [Line Items]	'
Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block]	'
	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 are summarized in the following table (in thousands):
		Nine Months Ended September 30,
	Income statement data	2013 (1)		2012
	Revenue	$	75,986	$	102,407
	Gross profit	21,753		28,620
	Net income	13,624		15,382
	Equity in earnings of affiliated companies	3,903		4,389
	_____________________
	(1)    Includes the financial data of Insituform-Germany through the date of its sale in June 2013.
Schedule of Variable Interest Entities [Table Text Block]	'
		Nine Months Ended September 30,
	Income statement data	2013		2012
	Revenue	$	62,650	$	74,313
	Gross profit	10,179		11,361
	Net income	2,040		1,391

Note_3_Share_Information_Table

Note 3 - Share Information (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Schedule of Weighted Average Number of Shares [Table Text Block]	'
	Earnings per share have been calculated using the following share information:
		Quarters Ended		Nine Months Ended September 30,
		September 30,
		2013	2012	2013	2012
	Weighted average number of common shares used for basic EPS	38,672,441	39,285,484	38,836,276	39,253,373
	Effect of dilutive stock options and restricted and deferred stock unit awards	398,932	319,745	392,349	306,241
	Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	39,071,373	39,605,229	39,228,625	39,559,614

Note_4_Goodwill_and_Intangible1

Note 4 - Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill [Table Text Block]	'
		Energy				North American				International				Commercial				Total
		and				Water and				Water and				and Structural (3)
		Mining (1)(2)				Wastewater				Wastewater
	Beginning balance at January 1, 2013	$	76.7			$	101.9			$	28.1			$	65.6			$	272.3
	Additions to goodwill through acquisitions	62.7				—				—				0.2				62.9
	Foreign currency translation	(0.4		)		0.9				(1.0		)		(0.3		)		(0.8		)
	Goodwill at end of period (4)	$	139			$	102.8			$	27.1			$	65.5			$	334.4
	__________________________
	(1)	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $1.4 million of goodwill associated with BWW, which operation now is reported as discontinued. Consequently, the goodwill associated with BWW is no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.
	(2)	During 2013, the Company recorded an increase of goodwill of $62.7 million related to the Brinderson acquisition.
	(3)	During 2013, the Company recorded an increase of goodwill of $0.2 million related to the Fyfe Asia acquisition.
	(4)	The Company does not have any accumulated impairment charges.
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	Intangible assets at September 30, 2013 and December 31, 2012 were as follows (in thousands):
		As of September 30, 2013 (1)(2)														As of December 31, 2012
		Weighted Average Useful Lives (Years)		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Gross Carrying Amount				Accumulated Amortization			Net Carrying Amount
	License agreements	7		$	3,921			$	(2,945	)		$	976			$	3,925			$	(2,821	)	$	1,104
	Backlog	0		4,749				(4,749		)		—				4,756				(4,756		)	—
	Leases	13		2,073				(436		)		1,637				2,067				(331		)	1,736
	Trademarks	17		21,362				(4,091		)		17,271				21,290				(3,317		)	17,972
	Non-competes	5		1,140				(731		)		409				710				(710		)	—
	Customer relationships	14		182,774				(25,133		)		157,641				123,301				(18,912		)	104,389
	Patents and acquired technology	18		59,890				(25,318		)		34,572				55,672				(21,244		)	34,428
				$	275,909			$	(63,403	)		$	212,506			$	211,721			$	(52,091	)	$	159,629
	__________________________
	-1	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $2.5 million of intangible assets associated with BWW, which operation now is reported as discontinued. Consequently, the intangible assets and accumulated amortization associated with BWW are no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.
	-2	During the third quarter of 2013, the Company recorded $59.8 million in customer relationships to be amortized over a weighted average life of 15 years and $0.4 million in non-compete agreements to be amortized over a weighted average life of 5 years related to the acquisition of Brinderson, as discussion in Note 1 of this report.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	Estimated amortization expense by year is as follows (in thousands):
	2013		$	12,476
	2014		14,583
	2015		14,590
	2016		14,564
	2017		14,543

Note_6_Stockholders_Equity_and1

Note 6 - Stockholders' Equity and Equity Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Shareholders' Equity and Share-based Payments [Abstract]	'
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	'
	A summary of stock award activity during the nine-month period ended September 30, 2013 follows:
		Stock Awards			Weighted
					Average
					Award Date
					Fair Value
	Outstanding at January 1, 2013	701,918			$	19.42
	Restricted shares awarded	431,877			24.09
	Restricted stock units awarded	112,401			25.11
	Restricted shares distributed	(274,028	)		19.03
	Restricted stock units distributed	(11,112	)		20.7
	Restricted shares forfeited	(20,704	)		21.41
	Restricted stock units forfeited	(54,481	)		20.38
	Outstanding at September 30, 2013	885,871			$	22.42
Schedule of Other Share-based Compensation, Activity [Table Text Block]	'
	A summary of deferred stock unit activity during the nine-month period ended September 30, 2013 follows:
		Deferred			Weighted
		Stock			Average
		Units			Award Date
					Fair Value
	Outstanding at January 1, 2013	181,518			$	19.06
	Awarded	39,876			22.33
	Shares distributed	(5,313	)		22.67
	Forfeited	(714	)		24
	Outstanding at September 30, 2013	215,367			$	19.56
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
	A summary of stock option activity during the nine-month period ended September 30, 2013 follows:
		Shares			Weighted
					Average
					Exercise
					Price
	Outstanding at January 1, 2013	1,223,618			$	18.49
	Granted	29,025			25.11
	Exercised	(29,511	)		20.14
	Canceled/Expired	(7,729	)		24.52
	Outstanding at September 30, 2013	1,215,403			$	18.57
	Exercisable at September 30, 2013	940,317			$	17.89
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]	'
	Financial data for stock option exercises are summarized in the following table (in thousands):
		Nine Months Ended September 30,
		2013				2012
	Amount collected from stock option exercises	$	738			$	480
	Total intrinsic value of stock option exercises	131				106
	Tax benefit of stock option exercises recorded in additional paid-in-capital	55				17
	Aggregate intrinsic value of outstanding stock options	6,983				3,263
	Aggregate intrinsic value of exercisable stock options	5,962				2,966
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
		Nine Months Ended September 30,
		2013				2012
		Range		Weighted Average		Range		Weighted Average
	Grant-date fair value	$12.92		$12.92		$8.14 - $8.19		$8.19
	Volatility	49.80%		49.80%		43.0% - 45.2%		45.10%
	Expected term (years)	7		7		7		7
	Dividend yield	—%		—%		—%		—%
	Risk-free rate	1.10%		1.10%		1.0% - 1.5%		1.50%

Note_8_Segment_Reporting_Table

Note 8 - Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information, by Segment [Table Text Block]	'
	Financial information by segment was as follows (in thousands):
		Quarters Ended						Nine Months Ended September 30,
		September 30,
		2013			2012			2013			2012
	Revenues:
	Energy and Mining	$	168,708		$	137,386		$	385,991		$	377,610
	North American Water and Wastewater	95,997			77,818			261,616			231,647
	International Water and Wastewater	26,152			27,766			80,064			80,712
	Commercial and Structural	16,808			19,897			48,070			55,267
	Total revenues	$	307,665		$	262,867		$	775,741		$	745,236
	Gross profit:
	Energy and Mining	$	37,118		$	33,710		$	87,678		$	93,466
	North American Water and Wastewater	21,357			17,183			55,786			48,850
	International Water and Wastewater	5,116			2,890			15,424			9,603
	Commercial and Structural	5,820			9,148			17,228			25,803
	Total gross profit	$	69,411		$	62,931		$	176,116		$	177,722
	Operating income (loss):
	Energy and Mining	$	12,874		$	21,426		$	24,481		$	42,902
	North American Water and Wastewater	10,328			6,289			23,010			16,361
	International Water and Wastewater	(257		)	(3,195		)	(1,338		)	(7,542		)
	Commercial and Structural	(913		)	2,345			(1,480		)	4,985
	Total operating income	$	22,032		$	26,865		$	44,673		$	56,706
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	'
	The following table summarizes revenues, gross profit and operating income (loss) by geographic region (in thousands):
		Quarters Ended						Nine Months Ended September 30,
		September 30,
		2013			2012			2013			2012
	Revenues:
	United States	$	202,353		$	162,427		$	496,544		$	472,059
	Canada	56,026			47,141			131,172			130,900
	Europe	20,605			21,455			65,592			62,398
	Other foreign	28,681			31,844			82,433			79,879
	Total revenues	$	307,665		$	262,867		$	775,741		$	745,236
	Gross profit:
	United States	$	43,838		$	40,375		$	111,006		$	121,487
	Canada	14,351			13,352			31,753			33,995
	Europe	4,769			5,332			15,453			15,107
	Other foreign	6,453			3,872			17,904			7,133
	Total gross profit	$	69,411		$	62,931		$	176,116		$	177,722
	Operating income (loss):
	United States	$	8,941		$	16,422		$	16,067		$	35,552
	Canada	10,397			9,069			20,622			20,928
	Europe	1,106			1,691			3,928			3,789
	Other foreign	1,588			(317		)	4,056			(3,563		)
	Total operating income	$	22,032		$	26,865		$	44,673		$	56,706

Note_9_Discontinued_Operations1

Note 9 - Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2013
Income Statement [Member]	'
Note 9 - Discontinued Operations (Tables) [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Operating results for discontinued operations are summarized as follows (in thousands):
		Quarters Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Revenues	$	744		$	2,288		$	8,864		$	8,045
	Gross profit (loss)	(837		)	(157		)	(4,077		)	164
	Operating expenses	210			556			1,828			1,466
	Closure charges of welding business	—			—			5,019			—
	Operating loss	(1,047		)	(723		)	(10,924		)	(1,302		)
	Loss before tax benefits	(1,047		)	(741		)	(10,742		)	(1,500		)
	Tax benefits	489			306			4,286			620
	Net loss	(558		)	(435		)	(6,456		)	(880		)
Balance Sheet [Member]	'
Note 9 - Discontinued Operations (Tables) [Line Items]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
	Balance sheet data for discontinued operations was as follows (in thousands):
		30-Sep-13			December 31, 2012
	Restricted cash	$	1,193		$	1,192
	Receivables, net	9,552			4,380
	Costs and estimated earnings in excess of billings	1,543			2,775
	Inventories	—			386
	Prepaid expenses and other current assets	77			253
	Property, plant and equipment, less accumulated depreciation	1,242			2,803
	Other assets	—			4,021
	Total assets	$	13,607		$	15,810
	Accounts payable	$	1,644		$	3,225
	Accrued expenses	757			1,660
	Total liabilities	$	2,401		$	4,885

Note_10_Derivative_Financial_I1

Note 10 - Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	'
	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,
					2013				2012
	Derivatives Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	11			$	—
			Total Assets		$	11			$	—
	Forward Currency Contracts		Accrued expenses		$	—			$	9
	Interest Rate Swaps		Other non-current liabilities		1,336				764
			Total Liabilities		$	1,336			$	773
	Derivatives Not Designated as Hedging Instruments:
	Forward Currency Contracts		Prepaid expenses and other current assets		$	583			$	—
			Total Assets		$	583			$	—
	Forward Currency Contracts		Accrued Expenses		$	—			$	585
			Total Derivative Assets		$	594			$	—
			Total Derivative Liabilities		1,336				1,358
			Total Net Derivative Asset (Liability)		$	742			$	1,358
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	'
	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-13				(Level 1)				(Level 2)		(Level 3)
	Assets:
	Forward Currency Contracts	$	594			$	—			$	594	$	—
	Total	$	594			$	—			$	594	$	—
	Liabilities:
	Interest Rate Swap	$	1,336			$	—			$	1,336	$	—
	Total	$	1,336			$	—			$	1,336	$	—
		Total Fair Value at				Quoted Prices in Active Markets for Identical Assets				Significant Observable Inputs		Significant Unobservable Inputs
		31-Dec-12				(Level 1)				(Level 2)		(Level 3)
	Liabilities:
	Forward Currency Contracts	$	594			$	—			$	594	$	—
	Interest Rate Swap	764				—				764		—
	Total	$	1,358			$	—			$	1,358	$	—
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]	'
	The following table summarizes the Company’s derivative positions at September 30, 2013:
		Position		Notional				Weighted		Average
				Amount				Average		Exchange
								Remaining		Rate
								Maturity
								In Years
	Canadian Dollar/USD	Sell		$	13,001,124			0.2		1.03
	Singapore Dollar/USD	Sell		$	1,979,368			0.2		1.26
	Hong Kong Dollar/USD	Sell		$	1,570,093			0.2		7.75
	Australian Dollar/USD	Sell		$	3,579,286			0.2		0.93
	USD/British Pound	Sell		£	1,900,000			0.7		0.84
	EURO/British Pound	Sell		£	8,000,000			0.9		1.61
	Interest Rate Swap			$	172,812,500			2.8

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

9 Months Ended

3 Months Ended

3 Months Ended

Sep. 30, 2013

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Jun. 30, 2015

Jun. 30, 2015

Jul. 02, 2013

Apr. 30, 2012

Jun. 30, 2013

Jun. 30, 2013

Sep. 30, 2013

Jul. 02, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2011

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Jul. 02, 2013

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

USD ($)

Goodwill and Intagible Assets [Member]

Tangible Assets [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Fyfe Asia [Member]

Fyfe LA [Member]

CRTS [Member]

CRTS [Member]

CRTS [Member]

USTS [Member]

Bayou Coating [Member]

Bayou Coating [Member]

2013 Credit Facility [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

General [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

$147,600,000

'

'

'

'

$147,600,000

'

'

'

'

'

'

'

'

'

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

'

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tangible Asset Impairment Charges, Net of Tax

'

700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Exit Costs

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15,000,000

'

'

'

'

Earnout reversal

-2,844,000

'

'

-6,892,000

'

'

-2,844,000

-6,892,000

'

'

'

'

'

'

'

'

'

'

'

2,800,000

5,900,000

'

'

'

'

'

Business Combination, Contingent Consideration, Liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

1,100,000

'

'

'

'

'

'

Noncontrolling Interest, Ownership Percentage by Parent

'

50.00%

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

51.00%

'

'

'

Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

49.00%

'

'

'

PercentOfBookValue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

49.00%

'

Equity Method Investment, Other than Temporary Impairment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,700,000

'

'

EquityMethodInvestmentOtherThanTemporaryImpairmentNetOfTax

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,800,000

'

'

Total consideration recorded

'

18,300,000

14,000,000

'

'

'

'

'

'

'

'

'

'

'

'

147,605,000

'

40,144,000

'

'

'

'

'

'

'

'

Gain (Loss) on Disposition of Business

'

11,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Transaction Costs

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Purchase Commitment, Amount (in Pounds)

'

'

'

'

'

'

'

'

'

3,600,000

2,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

NumberOfJointVentures

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Acquire Businesses, Gross

'

'

'

'

40,700,000

2,300,000

'

'

40,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from line of credit

'

'

'

'

18,000,000

'

0

26,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments for Previous Acquisition

'

'

'

'

'

$1,100,000

$2,112,000

$0

$600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note_1_General_Details_Busines

Note 1 - General (Details) - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Brinderson LP [Member]	'		'		'		'
Note 1 - General - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions [Line Items]	'		'		'		'
Revenues	$47,948		$0		$47,948		$0
Net income(1)	1,225	[1]	0	[1]	1,225	[1]	0	[1]
Fyfe LA And Fyfe Asia [Member]	'		'		'		'
Note 1 - General - Business Acquisitions - Contributions to Revenues and Profits Since Acquisitions [Line Items]	'		'		'		'
Revenues	4,574		3,985		12,530		8,457
Net income(1)	$149	[1]	$179	[1]	$519	[1]	$135	[1]
[1]	Net income includes an allocation of corporate expenses that is not necessarily an indication of the entity’s operations on a stand alone basis.

Note_1_General_Details_Busines1

Note 1 - General (Details) - Business Acquisitions - Proforma Information (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Business Acquisitions - Proforma Information [Abstract]	'		'		'		'
Revenues	'	[1]	$316,984		$885,842		$905,282
Net income (loss)	'	[1]	$22,401	[2]	$40,889	[2]	$44,758	[2]
[1]	Amounts are presented in the unaudited consolidated statement of operations for the quarter ended September 30, 2013.
[2]	Includes pro-forma adjustments for purchase price depreciation and amortization as if those intangibles were recorded as of January 1 of the year preceding the respective acquisition date.

Note_1_General_Details_Busines2

Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
	USD ($)	EUR (€)	USD ($)	USD ($)	Brinderson LP [Member]	Fyfe Asia [Member]	Fyfe Asia [Member]
					USD ($)	USD ($)	USD ($)
Note 1 - General - Business Acquisitions - Initial Purchase Price Allocation [Line Items]	'	'	'	'	'	'	'
Cash	'	'	'	'	$3,842	$1,303	'
Receivables and cost and estimated earnings in excess of billings	'	'	'	'	28,353	9,022	'
Prepaid expenses and other current assets	'	'	'	'	655	1,262	'
Property, plant and equipment	'	'	'	'	6,848	938	'
Identified intangible assets	'	'	'	'	60,210	14,130	'
Other assets	'	'	'	'	1,071	0	'
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings	'	'	'	'	-16,072	-4,109	'
Deferred tax liabilities	'	'	'	'	0	-2,410	'
Total consideration recorded	18,300	14,000	'	'	147,605	40,144	'
Total identifiable net assets	'	'	'	'	84,907	20,136	20,342
Goodwill at September 30, 2013	'	'	$334,416	$272,294	$62,698	$20,008	$19,802

Note_1_General_Details_Busines3

Note 1 - General (Details) - Business Acquisitions - Continued Purchase Price Allocation (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified			Fyfe Asia [Member]	Payables [Member]
				Fyfe Asia [Member]
Identifiable Net Assets [Roll Forward]	'	'	'	'
Total identifiable net assets	'	'	$20,342	'
Change in goodwill related to acquisitions	'	'	206	206
Total identifiable net assets	'	'	20,136	'
FYFE Asia Adjustment - Goodwill	'	'	'	'
Goodwill	334,416	272,294	19,802	'
Change in goodwill related to acquisitions	'	'	206	206
Goodwill	$334,416	$272,294	$20,008	'

Note_2_Accounting_Policies_Det

Note 2 - Accounting Policies (Details)	3 Months Ended		24 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2015	Jun. 30, 2015	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	USD ($)	EUR (€)	USD ($)	GBP (£)	USD ($)	USD ($)	USD ($)	Bayou Delta [Member]	Insituform-Germany [Member]	WCU [Member]	Bayou Coating [Member]
Note 2 - Accounting Policies [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	'	'	'	'	$2,100,000	'	$8,500,000	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	'	'	'	'	1,300,000	'	900,000	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	'	'	'	'	200,000	'	300,000	'	'	'	'
Noncontrolling Interest, Ownership Percentage by Parent	50.00%	50.00%	'	'	'	'	'	'	50.00%	'	'
Business Combination, Consideration Transferred	18,300,000	14,000,000	'	'	'	'	'	'	'	'	'
Gain (Loss) on Disposition of Business	11,300,000	'	'	'	'	'	'	'	'	'	'
Business Acquisition, Transaction Costs	500,000	'	'	'	'	'	'	'	'	'	'
Long-term Purchase Commitment, Amount (in Pounds)	'	'	3,600,000	2,300,000	'	'	'	'	'	'	'
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	'	'	'	'	'	'	'	'	'	49.00%	'
Equity Method Investment, Ownership Percentage	'	'	'	'	'	'	'	41.00%	'	'	49.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	'	'	'	'	$10,920,000	$19,181,000	'	'	'	'	'

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, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Financial Data for Investments in Affiliated Companies [Abstract]	'	'	'		'
Revenue	'	'	$75,986	[1]	$102,407
Gross profit	'	'	21,753	[1]	28,620
Net income	'	'	13,624	[1]	15,382
Equity in earnings of affiliated companies	$1,691	$2,001	$3,903	[1]	$4,389
[1]	Includes the financial data of Insituform-Germany through the date of its sale in June 2013.

Note_2_Accounting_Policies_Det2

Note 2 - Accounting Policies (Details) - Financial Data for Variable Interest Entities - Balance Sheet (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financial Data for Variable Interest Entities - Balance Sheet [Abstract]	'	'
Current assets	$52,896	$65,251
Non-current assets	52,264	47,086
Current liabilities	37,162	45,604
Non-current liabilities	$22,326	$23,169

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, 2013	Sep. 30, 2012
Financial Data for Variable Interest Entities - Income Statement [Abstract]	'	'
Revenue	$62,650	$74,313
Gross profit	10,179	11,361
Net income	$2,040	$1,391

Note_3_Share_Information_Detai

Note 3 - Share Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	159,639	252,348	159,639	252,348

Note_3_Share_Information_Detai1

Note 3 - Share Information (Details) - Earnings Per Share Calculation, Share Information	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share Calculation, Share Information [Abstract]	'	'	'	'
Weighted average number of common shares used for basic EPS	38,672,441	39,285,484	38,836,276	39,253,373
Effect of dilutive stock options and restricted and deferred stock unit awards	398,932	319,745	392,349	306,241
Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	39,071,373	39,605,229	39,228,625	39,559,614

Note_4_Goodwill_and_Intangible2

Note 4 - Goodwill and Intangible Assets (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

Sep. 30, 2013

Jun. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Customer Relationships [Member]

Noncompete Agreements [Member]

Fyfe Asia [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Brinderson LP [Member]

Customer Relationships [Member]

Noncompete Agreements [Member]

Finite-Lived Intangible Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Impairment of Intangible Assets (Excluding Goodwill)

'

$2,500,000

'

'

'

'

'

'

'

'

'

'

Finite-Lived Customer Relationships, Gross

'

'

'

'

'

'

'

'

'

59,800,000

'

'

Finite-Lived Intangible Asset, Useful Life

'

'

'

'

'

'14 years

[1],[2]

'5 years

[1],[2]

'

'

'

'15 years

'5 years

Finite-Lived Noncompete Agreements, Gross

'

'

'

'

'

'

'

'

'

400,000

'

'

Goodwill, Written off Related to Sale of Business Unit

'

1,400,000

'

'

'

'

'

'

'

'

'

'

Goodwill, Purchase Accounting Adjustments

'

'

'

'

'

'

'

206,000

'

'

'

'

Amortization of Intangible Assets

3,600,000

'

2,600,000

8,800,000

8,100,000

'

'

'

'

'

'

'

Goodwill, Acquired During Period

'

'

'

$62,900,000

'

'

'

$200,000

$62,700,000

'

'

'

[1]

During the third quarter of 2013, the Company recorded $59.8 million in customer relationships to be amortized over a weighted average life of 15 years and $0.4 million in non-compete agreements to be amortized over a weighted average life of 5 years related to the acquisition of Brinderson, as discussion in Note 1 of this report.

[2]

During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $2.5 million of intangible assets associated with BWW, which operation now is reported as discontinued. Consequently, the intangible assets and accumulated amortization associated with BWW are no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.

Note_4_Goodwill_and_Intangible3

Note 4 - Goodwill and Intangible Assets (Details) - Reconciliation Goodwill (USD $)	9 Months Ended
	Sep. 30, 2013
Goodwill [Roll Forward]	'
Goodwill	$272,294,000
Additions to goodwill through acquisitions	62,900,000
Foreign currency translation	-800,000
Goodwill	334,416,000
Energy And Mining [Member]	'
Goodwill [Roll Forward]	'
Goodwill	76,700,000	[1],[2]
Additions to goodwill through acquisitions	62,700,000	[1],[2]
Foreign currency translation	-400,000	[1],[2]
Goodwill	139,000,000	[1],[2],[3]
North American Water And Wastewater [Member]	'
Goodwill [Roll Forward]	'
Goodwill	101,900,000
Additions to goodwill through acquisitions	0
Foreign currency translation	900,000
Goodwill	102,800,000	[3]
International Water And Wastewater [Member]	'
Goodwill [Roll Forward]	'
Goodwill	28,100,000
Additions to goodwill through acquisitions	0
Foreign currency translation	-1,000,000
Goodwill	27,100,000	[3]
Commercial And Structural [Member]	'
Goodwill [Roll Forward]	'
Goodwill	65,600,000	[4]
Additions to goodwill through acquisitions	200,000	[4]
Foreign currency translation	-300,000	[4]
Goodwill	$65,500,000	[3],[4]
[1]	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $1.4 million of goodwill associated with BWW, which operation now is reported as discontinued. Consequently, the goodwill associated with BWW is no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.
[2]	During 2013, the Company recorded an increase of goodwill of $62.7 million related to the Brinderson acquisition.
[3]	The Company does not have any accumulated impairment charges.
[4]	During 2013, the Company recorded an increase of goodwill of $0.2 million related to the Fyfe Asia acquisition.

Note_4_Goodwill_and_Intangible4

Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]	'		'
Gross Carrying Amount	$275,909	[1],[2]	$211,721
Accumulated Amortization	-63,403	[1],[2]	-52,091
Net Carrying Amount	212,506		159,629
Licensing Agreements [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'7 years	[1],[2]	'
Gross Carrying Amount	3,921	[1],[2]	3,925
Accumulated Amortization	-2,945	[1],[2]	-2,821
Net Carrying Amount	976	[1],[2]	1,104
Order or Production Backlog [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'0 years	[1],[2]	'
Gross Carrying Amount	4,749	[1],[2]	4,756
Accumulated Amortization	-4,749	[1],[2]	-4,756
Net Carrying Amount	0	[1],[2]	0
Lease Agreements [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'13 years	[1],[2]	'
Gross Carrying Amount	2,073	[1],[2]	2,067
Accumulated Amortization	-436	[1],[2]	-331
Net Carrying Amount	1,637	[1],[2]	1,736
Trademarks [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'17 years	[1],[2]	'
Gross Carrying Amount	21,362	[1],[2]	21,290
Accumulated Amortization	-4,091	[1],[2]	-3,317
Net Carrying Amount	17,271	[1],[2]	17,972
Noncompete Agreements [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'5 years	[1],[2]	'
Gross Carrying Amount	1,140	[1],[2]	710
Accumulated Amortization	-731	[1],[2]	-710
Net Carrying Amount	409	[1],[2]	0
Customer Relationships [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'14 years	[1],[2]	'
Gross Carrying Amount	182,774	[1],[2]	123,301
Accumulated Amortization	-25,133	[1],[2]	-18,912
Net Carrying Amount	157,641	[1],[2]	104,389
Patents [Member]	'		'
Finite-Lived Intangible Assets [Line Items]	'		'
Weighted Average Useful Lives	'18 years	[1],[2]	'
Gross Carrying Amount	59,890	[1],[2]	55,672
Accumulated Amortization	-25,318	[1],[2]	-21,244
Net Carrying Amount	$34,572	[1],[2]	$34,428
[1]	During the third quarter of 2013, the Company recorded $59.8 million in customer relationships to be amortized over a weighted average life of 15 years and $0.4 million in non-compete agreements to be amortized over a weighted average life of 5 years related to the acquisition of Brinderson, as discussion in Note 1 of this report.
[2]	During the second quarter of 2013, the Company approved a plan of liquidation with respect to BWW and, in connection therewith, recorded a write-down of the $2.5 million of intangible assets associated with BWW, which operation now is reported as discontinued. Consequently, the intangible assets and accumulated amortization associated with BWW are no longer included in this table. Additionally, all prior year balances have been retrospectively adjusted. For further information, see Note 9 contained within this report.

Note_4_Goodwill_and_Intangible5

Note 4 - Goodwill and Intangible Assets (Details) - Estimated Future Amortization Expense by Year (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Estimated Future Amortization Expense by Year [Abstract]	'
2013	$12,476
2014	14,583
2015	14,590
2016	14,564
2017	$14,543

Note_5_LongTerm_Debt_and_Credi1

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

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Jul. 02, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Jul. 02, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Aug. 31, 2011

Wasco Energy [Member]

Wasco Energy [Member]

Bayou Wasco [Member]

Initial [Member]

Initial [Member]

Additional [Member]

Additional [Member]

Insurance Carriers Collateral [Member]

Work Performance Obligations [Member]

Bayou Wasco [Member]

BPPC [Member]

BPPC [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2013 Credit Facility [Member]

2011 Credit Facility [Member]

2011 Credit Facility [Member]

Minimum [Member]

Maximum [Member]

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Face Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$650

'

'

$250

$500

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300

'

'

'

'

Line of Credit Facility, Term

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Secured Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

345.6

350

'

'

'

'

Term Loan, Term

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Maturity Date

1-Jul-18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.25%

2.25%

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'one month LIBOR borrowing rate

'

'

'

'

'

Debt Instrument, Interest Rate at Period End

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.21%

'

'

'

'

'

Unsecured Debt

'

'

218.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Amount Outstanding

'

35.5

'

'

'

'

'

'

'

'

'

'

'

'

'

35.5

'

'

'

26

'

Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds

'

147.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility, Retired Amount

'

232.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Consideration Paid

'

7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Loans Payable

0.3

'

0.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Due from Joint Ventures

'

'

4.1

6.9

5.5

14

8

8

6.2

6.2

'

'

11

14.2

14.2

'

'

'

'

'

'

Other Long-term Debt

5

'

5.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Letters of Credit Outstanding, Amount

18.7

'

'

'

'

'

'

'

'

'

10.4

8.3

'

'

'

'

'

'

'

'

'

Long-term Debt, Fair Value

385.8

'

253.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative, Amount of Hedged Item

175

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative, Fixed Interest Rate Percentage

0.87%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Maximum Consolidated Leverage Ratio

3.75

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

CreditFacilityMinimumConsolidatedLeverageRatio

3.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Actual Consolidated Leverage Ratio

2.64

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Remaining Borrowing Capacity

$163.60

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Minimum Consolidated Fixed Charge Ratio

1.25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility Actual Consolidated Fixed Charge Ratio

1.85

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2013

31-May-13

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Minimum [Member]

Maximum [Member]

Through the Open Market Repurchase Program [Member]

In Connection with Equity Compensation Programs [Member]

Employee Plan [Member]

Director Plan [Member]

Deferred Stock Units [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]

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchase Program, Authorized Amount

$10

$10

$5

'

'

'

$10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Shares (in Shares)

'

'

'

'

'

'

'

'

'

782,260

51,292

'

'

'

'

'

'

'

'

'

'

Stock Repurchased During Period, Value

'

'

'

'

'

'

'

'

'

17.8

1.2

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

$22.79

$23.32

'

'

'

'

'

'

'

'

'

'

Number of Equity-Based Compensation Plans

3

'

'

3

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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, Number of Shares Available for Grant (in Shares)

'

'

'

'

'

'

'

'

'

'

'

2,840,257

168,390

'

'

'

'

'

'

'

'

Allocated Share-based Compensation Expense

'

'

'

0.8

2.8

3

'

'

'

'

'

'

'

0

0

0.9

0.7

0.4

0.5

1.4

1.6

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

$10.10

'

'

$10.10

$10.10

'

'

'

'

'

'

'

'

'

'

'

'

$1.50

'

$1.50

'

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

'

'

'

'

'2 years 1 month 6 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year 6 months

'

Deferred Stock Unit, Share Transfer Obligation (in Shares)

1

'

'

1

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Options, General Term

'

'

'

'

'

'

'

'7 years

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

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

$23.72

'

'

$23.72

$23.72

$19.16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note_6_Stockholders_Equity_and3

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Stock Award Activity (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
	Restricted Stock [Member]	Restricted Stock Units (RSUs) [Member]	Stock Awards [Member]	Stock Awards [Member]
Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Stock Award Activity [Line Items]	'	'	'	'
Stock Awards - Outstanding	'	'	885,871	701,918
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	'	'	$22.42	$19.42
Stock Awards - Awarded	431,877	112,401	'	'
Weighted Average Award Date Fair Value - Awarded (in Dollars per share)	$24.09	$25.11	'	'
Stock Awards - Distributed	-274,028	-11,112	'	'
Weighted Average Award Date Fair Value - Distributed (in Dollars per share)	$19.03	$20.70	'	'
Stock Awards - Forfeited	-20,704	-54,481	'	'
Weighted Average Award Date Fair Value - Forfeited (in Dollars per share)	$21.41	$20.38	'	'
Stock Awards - Outstanding	'	'	885,871	701,918
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	'	'	$22.42	$19.42

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, 2013
Deferred Stock Units [Member]	'
Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Deferred Stock Unit Activity [Line Items]	'
Stock Awards - Outstanding	181,518
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	$19.06
Awarded	39,876
Awarded (in Dollars per share)	$22.33
Shares distributed	-5,313
Shares distributed (in Dollars per share)	$22.67
Forfeited	-714
Forfeited (in Dollars per share)	$24
Stock Awards - Outstanding	215,367
Weighted Average Award Date Fair Value - Outstanding (in Dollars per share)	$19.56

Note_6_Stockholders_Equity_and5

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Summary of Stock Option Activity (USD $)	9 Months Ended
	Sep. 30, 2013
Summary of Stock Option Activity [Abstract]	'
Outstanding at January 1, 2013	1,223,618
Outstanding at January 1, 2013 (in Dollars per share)	$18.49
Granted	29,025
Granted (in Dollars per share)	$25.11
Exercised	-29,511
Exercised (in Dollars per share)	$20.14
Canceled/Expired	-7,729
Canceled/Expired (in Dollars per share)	$24.52
Outstanding at September 30, 2013	1,215,403
Outstanding at September 30, 2013 (in Dollars per share)	$18.57
Exercisable at September 30, 2013	940,317
Exercisable at September 30, 2013 (in Dollars per share)	$17.89

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, 2013	Sep. 30, 2012
Additional Stock Option Information [Abstract]	'	'
Amount collected from stock option exercises	$738	$480
Total intrinsic value of stock option exercises	131	106
Tax benefit of stock option exercises recorded in additional paid-in-capital	55	17
Aggregate intrinsic value of outstanding stock options	6,983	3,263
Aggregate intrinsic value of exercisable stock options	$5,962	$2,966

Note_6_Stockholders_Equity_and7

Note 6 - Stockholders' Equity and Equity Compensation (Details) - Binomial Option-Pricing Model Assumptions (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Grant-date fair value (in Dollars per share)	$12.92	$8.19
Volatility	49.80%	45.10%
Volatility, Minimum	'	43.00%
Volatility, Maximum	'	45.20%
Expected term (years)	'7 years	'7 years
Dividend yield	0.00%	0.00%
Risk-free rate	1.10%	1.50%
Risk-free rate, Minimum	'	1.00%
Risk-free rate, Maximum	'	1.50%
Minimum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Grant-date fair value (in Dollars per share)	'	$8.14
Maximum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Grant-date fair value (in Dollars per share)	'	$8.19

Note_8_Segment_Reporting_Detai

Note 8 - Segment Reporting (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 8 - Segment Reporting (Details) [Line Items]	'	'	'	'
Number of Markets	'	'	3	'
Number of Reportable Segments	'	'	4	'
Business Combination, Acquisition Related Costs (in Dollars)	$2,267	$607	$4,175	$2,594
Water and Wastewater [Member]	'	'	'	'
Note 8 - Segment Reporting (Details) [Line Items]	'	'	'	'
Number of Geographic Segments	'	'	2	'

Note_8_Segment_Reporting_Detai1

Note 8 - Segment Reporting (Details) - Financial Information by Segment (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:	'	'	'	'
Revenues	$307,665	$262,867	$775,741	$745,236
Gross profit:	'	'	'	'
Gross profit	69,411	62,931	176,116	177,722
Operating income (loss):	'	'	'	'
Operating income (loss)	22,032	26,865	44,673	56,706
Energy And Mining [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	168,708	137,386	385,991	377,610
Gross profit:	'	'	'	'
Gross profit	37,118	33,710	87,678	93,466
Operating income (loss):	'	'	'	'
Operating income (loss)	12,874	21,426	24,481	42,902
North American Water And Wastewater [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	95,997	77,818	261,616	231,647
Gross profit:	'	'	'	'
Gross profit	21,357	17,183	55,786	48,850
Operating income (loss):	'	'	'	'
Operating income (loss)	10,328	6,289	23,010	16,361
International Water And Wastewater [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	26,152	27,766	80,064	80,712
Gross profit:	'	'	'	'
Gross profit	5,116	2,890	15,424	9,603
Operating income (loss):	'	'	'	'
Operating income (loss)	-257	-3,195	-1,338	-7,542
Commercial And Structural [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	16,808	19,897	48,070	55,267
Gross profit:	'	'	'	'
Gross profit	5,820	9,148	17,228	25,803
Operating income (loss):	'	'	'	'
Operating income (loss)	($913)	$2,345	($1,480)	$4,985

Note_8_Segment_Reporting_Detai2

Note 8 - 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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:	'	'	'	'
Revenues	$307,665	$262,867	$775,741	$745,236
Gross Profit:	'	'	'	'
Gross profit	69,411	62,931	176,116	177,722
Operating income (loss)	'	'	'	'
Operating income (loss)	22,032	26,865	44,673	56,706
United States [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	202,353	162,427	496,544	472,059
Gross Profit:	'	'	'	'
Gross profit	43,838	40,375	111,006	121,487
Operating income (loss)	'	'	'	'
Operating income (loss)	8,941	16,422	16,067	35,552
Canada [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	56,026	47,141	131,172	130,900
Gross Profit:	'	'	'	'
Gross profit	14,351	13,352	31,753	33,995
Operating income (loss)	'	'	'	'
Operating income (loss)	10,397	9,069	20,622	20,928
Europe [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	20,605	21,455	65,592	62,398
Gross Profit:	'	'	'	'
Gross profit	4,769	5,332	15,453	15,107
Operating income (loss)	'	'	'	'
Operating income (loss)	1,106	1,691	3,928	3,789
Other foreign [Member]	'	'	'	'
Revenues:	'	'	'	'
Revenues	28,681	31,844	82,433	79,879
Gross Profit:	'	'	'	'
Gross profit	6,453	3,872	17,904	7,133
Operating income (loss)	'	'	'	'
Operating income (loss)	$1,588	($317)	$4,056	($3,563)

Note_9_Discontinued_Operations2

Note 9 - Discontinued Operations (Details) (USD $)	3 Months Ended	9 Months Ended
	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
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	1,100,000	'	'
Tangible Asset Impairment Charges, Net of Tax	700,000	'	'
Proceeds from Sale of Property, Plant, and Equipment	'	1,856,000	3,399,000
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_9_Discontinued_Operations3

Note 9 - Discontinued Operations (Details) - Operating Results for Discontinued Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'
Closure charges of welding business	'	'	$100	'
Welding Business [Member]	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'
Revenues	744	2,288	8,864	8,045
Gross profit	-837	-157	-4,077	164
Operating expenses	210	556	1,828	1,466
Closure charges of welding business	0	0	5,019	0
Operating loss	-1,047	-723	-10,924	-1,302
Loss before tax benefits	-1,047	-741	-10,742	-1,500
Tax benefits	489	306	4,286	620
Net loss	($558)	($435)	($6,456)	($880)

Note_9_Discontinued_Operations4

Note 9 - Discontinued Operations (Details) - Balance Sheet Data for Discontinued Operations (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Costs and estimated earnings in excess of billings	$93,443	$67,740
Discontinued Operations [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Restricted cash	1,193	1,192
Receivables, net	9,552	4,380
Costs and estimated earnings in excess of billings	1,543	2,775
Inventories	0	386
Prepaid expenses and other current assets	77	253
Property, plant and equipment, less accumulated depreciation	1,242	2,803
Other assets	0	4,021
Total assets	13,607	15,810
Accounts payable	1,644	3,225
Accrued expenses	757	1,660
Total liabilities	$2,401	$4,885

Note_10_Derivative_Financial_I2

Note 10 - Derivative Financial Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]	'	'	'	'
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$100,000	$100,000	$100,000	$100,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	2,100,000	8,500,000	2,100,000	8,500,000
Derivative, Amount of Hedged Item	175,000,000	'	175,000,000	'
Derivative, Fixed Interest Rate Percentage	0.87%	'	0.87%	'
2011 Interest Rate Swap [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Derivative Asset, Notional Amount	83,000,000	'	83,000,000	'
2013 Interest Rate Swap [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Derivative Asset, Notional Amount	175,000,000	'	175,000,000	'
Cash Flow Hedging [Member]	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$100,000	'	$100,000	'

Note_10_Derivative_Financial_I3

Note 10 - Derivative Financial Instruments (Details) - Summary of the Fair Value Amounts of Derivative Instruments (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Derivatives Designated as Hedging Instruments	'	'
Forward Currency Contracts	$11	$0
Cash Flow Hedge Derivative Instrument Assets at Fair Value	11	0
Forward Currency Contracts	0	9
Interest Rate Swaps	1,336	764
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	1,336	773
Derivatives Not Designated as Hedging Instruments	'	'
Forward Currency Contracts	583	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	583	0
Forward Currency Contracts	0	585
Total Derivative Assets	594	0
Derivative Liability	1,336	1,358
Derivative Assets (Liabilities), at Fair Value, Net	742	1,358
Fair Value, Inputs, Level 2 [Member]	'	'
Derivatives Not Designated as Hedging Instruments	'	'
Total Derivative Assets	594	'
Derivative Liability	$1,336	$1,358

Note_10_Derivative_Financial_I4

Note 10 - Derivative Financial Instruments (Details) - Liabilities Measured at Fair Value on a Recurring Basis and the Basis for that Measurement (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Forward Currency Contracts	$594	'
Total Derivative Assets	594	0
Liabilities	'	'
Forward Currency Contracts	'	594
Interest Rate Swap	1,336	764
Total Derivative Liabilities	1,336	1,358
Fair Value, Inputs, Level 1 [Member]	'	'
Assets	'	'
Forward Currency Contracts	0	'
Total Derivative Assets	0	'
Liabilities	'	'
Forward Currency Contracts	'	0
Interest Rate Swap	0	0
Total Derivative Liabilities	0	0
Fair Value, Inputs, Level 2 [Member]	'	'
Assets	'	'
Forward Currency Contracts	594	'
Total Derivative Assets	594	'
Liabilities	'	'
Forward Currency Contracts	'	594
Interest Rate Swap	1,336	764
Total Derivative Liabilities	1,336	1,358
Fair Value, Inputs, Level 3 [Member]	'	'
Assets	'	'
Forward Currency Contracts	0	'
Total Derivative Assets	0	'
Liabilities	'	'
Forward Currency Contracts	'	0
Interest Rate Swap	0	0
Total Derivative Liabilities	$0	$0

Note_10_Derivative_Financial_I5

Note 10 - Derivative Financial Instruments (Details) - Summary of the Company’s Derivative Positions	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	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	$13,001,124	$1,979,368	$1,570,093	$3,579,286	£ 1,900,000	£ 8,000,000	$172,812,500
Weighted Average Remaining Maturity In Years	'2 months 12 days	'2 months 12 days	'2 months 12 days	'2 months 12 days	'8 months 12 days	'10 months 24 days	'2 years 9 months 18 days
Average Exchange Rate	1.03	1.26	7.75	0.93	0.84	1.61	'