Willbros 10-Q 6 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	WG
Entity Registrant Name	Willbros Group, Inc.\NEW\
Entity Central Index Key	1449732
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		61,396,119

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$38,988	$23,273
Accounts receivable, net	295,774	347,137
Contract cost and recognized income not yet billed	31,517	39,781
Prepaid expenses and other assets	23,531	25,432
Parts and supplies inventories	1,264	3,555
Deferred income taxes	6,030	6,621
Assets held for sale	1,700	0
Assets associated with discontinued operations	5,706	7,057
Total current assets	404,510	452,856
Property, plant and equipment, net	82,092	94,432
Intangible assets, net	98,713	116,130
Deferred income taxes	698	711
Other assets	27,190	28,078
Total assets	613,203	692,207
Current liabilities:
Accounts payable and accrued liabilities	178,858	207,313
Contract billings in excess of cost and recognized income	12,177	16,371
Current portion of capital lease obligations	940	917
Notes payable and current portion of long-term debt	7,749	7,476
Accrued income taxes	2,320	2,430
Other current liabilities	8,480	7,462
Liabilities associated with discontinued operations	4,740	5,185
Total current liabilities	215,264	247,154
Long-term debt	214,862	280,170
Capital lease obligations	226	467
Long-term liabilities for unrecognized tax benefits	109	117
Deferred income taxes	6,304	6,895
Other long-term liabilities	42,085	43,579
Total liabilities	478,850	578,382
Contingencies and commitments (Note 13)
Stockholders’ equity:
Preferred stock, par value $.01 per share, 1,000,000 shares authorized, none issued	0	0
Common stock, par value $.05 per share, 70,000,000 shares authorized and 62,554,459 shares issued at March 31, 2015 (52,094,931 at December 31, 2014)	3,114	2,597
Additional paid-in capital	738,866	703,728
Accumulated deficit	-591,569	-581,745
Treasury stock at cost, 1,547,593 shares at March 31, 2015 (1,430,690 at December 31, 2014)	-13,994	-13,832
Accumulated other comprehensive income (loss)	-2,353	2,788
Total Willbros Group, Inc. stockholders’ equity	134,064	113,536
Noncontrolling interest	289	289
Total stockholders’ equity	134,353	113,825
Total liabilities and stockholders’ equity	$613,203	$692,207

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.05	$0.05
Common stock, shares authorized	70,000,000	70,000,000
Common stock, shares issued	62,554,459	52,094,931
Treasury stock, shares	1,547,593	1,430,690

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Contract revenue	$346,932	$476,538
Operating expenses:
Contract	327,643	441,996
Amortization of intangibles	3,095	3,119
General and administrative	35,632	37,072
Gain on sale of subsidiaries	-58,549	0
Other charges	3,950	0
Total operating expenses	311,771	482,187
Operating income (loss)	35,161	-5,649
Non-operating expenses:
Interest expense, net	-8,296	-7,718
Debt covenant suspension and extinguishment charges	-35,869	0
Other, net	-110	40
Total non-operating expense	-44,275	-7,678
Loss from continuing operations before income taxes	-9,114	-13,327
Provision for income taxes	317	3,669
Loss from continuing operations	-9,431	-16,996
Loss from discontinued operations net of provision for income taxes	-393	-7,994
Net loss	($9,824)	($24,990)
Basic income (loss) per share attributable to Company shareholders:
Loss from continuing operations, basic (in USD per share)	($0.19)	($0.35)
Loss from discontinued operations, diluted (in USD per share)	($0.01)	($0.16)
Net loss (in USD per share)	($0.20)	($0.51)
Diluted income (loss) per share attributable to Company shareholders:
Loss from continuing operations, basic (in USD per share)	($0.19)	($0.35)
Loss from discontinued operations, diluted (in USD per share)	($0.01)	($0.16)
Net loss (in USD per share)	($0.20)	($0.51)
Weighted average number of common shares outstanding:
Basic (in shares)	49,819,388	48,847,349
Diluted (in shares)	49,819,388	48,847,349

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	($9,824)	($24,990)
Other comprehensive loss, net of tax
Foreign currency translation adjustments	-4,651	-2,063
Changes in derivative financial instruments	-490	-785
Total other comprehensive loss, net of tax	-5,141	-2,848
Total comprehensive loss	($14,965)	($27,838)

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net loss	($9,824)	($24,990)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Loss from discontinued operations	393	7,994
Depreciation and amortization	8,619	9,164
Impairment of long-lived asset	1,979	0
Debt covenant suspension and extinguishment charges	35,869	0
Stock-based compensation	1,918	2,479
Amortization of debt issuance costs	161	156
Non-cash interest expense	0	302
Deferred income tax expense	-36	3,177
Gain on disposal of property and equipment	-280	-1,242
Gain on sale of subsidiaries	-58,549	0
Provision for (recovery of) bad debts	-118	68
Changes in operating assets and liabilities:
Accounts receivable, net	28,985	7,075
Contract cost and recognized income not yet billed	7,867	-26,831
Prepaid expenses and other assets	1,120	-3,521
Accounts payable and accrued liabilities	-16,021	9,681
Accrued income taxes	-139	-3,073
Contract billings in excess of cost and recognized income	-4,192	22,996
Other assets and liabilities, net	-1,646	-3,721
Cash used in operating activities of continuing operations	-3,894	-286
Cash provided by operating activities of discontinued operations	116	15,348
Cash provided by (used in) operating activities	-3,778	15,062
Cash flows from investing activities:
Proceeds from sales of property, plant and equipment	453	1,742
Proceeds from sale of subsidiaries	85,741	21,152
Purchases of property, plant and equipment	-1,641	-3,635
Cash provided by investing activities of continuing operations	84,553	19,259
Cash provided by investing activities of discontinued operations	397	0
Cash provided by investing activities	84,950	19,259
Cash flows from financing activities:
Proceeds from revolver and notes payable	32,100	0
Payments on capital leases	-218	-268
Payments of revolver and notes payable	-30,279	-19,097
Payments on term loan facility	-65,537	-2,902
Cost of debt issuance	-527	0
Payments to reacquire common stock	-162	-893
Cash used in financing activities of continuing operations	-64,623	-23,160
Cash used in financing activities of discontinued operations	0	-71
Cash used in financing activities	-64,623	-23,231
Effect of exchange rate changes on cash and cash equivalents	-834	-823
Net increase in cash and cash equivalents	15,715	10,267
Cash and cash equivalents of continuing operations at beginning of period	23,273	42,569
Cash and cash equivalents of discontinued operations at beginning of period	0	1,041
Cash and cash equivalents at beginning of period	23,273	43,610
Cash and cash equivalents at end of period	38,988	53,877
Less: cash and cash equivalents of discontinued operations at end of period	0	0
Cash and cash equivalents of continuing operations at end of period	38,988	53,877
Supplemental disclosures of cash flow information:
Cash paid for interest (including discontinued operations)	8,324	7,037
Cash paid for income taxes (including discontinued operations)	$813	$7,216

The_Company_and_Basis_of_Prese

The Company and Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
The Company and Basis of Presentation	Willbros Group, Inc., a Delaware corporation, and its subsidiaries (the “Company,” “Willbros” or “WGI”), is a specialty energy infrastructure contractor serving the oil, gas, refinery, petrochemical and power industries. The Company’s offerings include engineering, procurement and construction (either individually or as an integrated “EPC” service offering), turnarounds, maintenance, facilities development and operations services. The Company’s principal markets for continuing operations are the United States and Canada. The Company obtains its work through competitive bidding and through negotiations with prospective clients. Contract values range from several thousand dollars to several hundred million dollars and contract durations range from a few weeks to more than two years.
	The accompanying Condensed Consolidated Balance Sheet as of December 31, 2014, which has been derived from audited consolidated financial statements, and the unaudited Condensed Consolidated Financial Statements as of March 31, 2015 and 2014, have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to those rules and regulations. However, the Company believes the presentations and disclosures herein are adequate to make the information not misleading. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the Company’s December 31, 2014 audited Consolidated Financial Statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.
	In the opinion of management, the unaudited Condensed Consolidated Financial Statements reflect all adjustments necessary to fairly state the financial position as of March 31, 2015, and the results of operations and cash flows of the Company for all interim periods presented. The results of operations and cash flows for the three months ended March 31, 2015 are not necessarily indicative of the operating results and cash flows to be achieved for the full year.
	The Condensed Consolidated Financial Statements include certain estimates and assumptions made by management. These estimates and assumptions relate to the reported amounts of assets and liabilities at the dates of the Condensed Consolidated Financial Statements and the reported amounts of revenue and expense during those periods. Significant items subject to such estimates and assumptions include the carrying amount of property, plant and equipment, and parts and supplies inventories; quantification of amounts recorded for contingencies, tax accruals and certain other accrued liabilities; valuation allowances for accounts receivable and deferred income tax assets; and revenue recognition under the percentage-of-completion method of accounting, including estimates of progress toward completion and estimates of gross profit or loss accrual on contracts in progress. The Company bases its estimates on historical experience and other assumptions that it believes to be relevant under the circumstances. Actual results could differ from those estimates.
	Reclassifications – Certain reclassifications have been made to prior period amounts to conform to the current period financial statement presentation. These reclassifications relate to the sale of the union refinery maintenance turnaround business unit, a related fabrication facility and associated tools and equipment (“CTS”) during the second quarter of 2014. See Note 15 – Discontinued Operations for additional discussion associated with these reclassifications.

New_Accounting_Pronouncements

New Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	In April 2015, the FASB issued guidance that simplifies the presentation of debt issuance costs with the requirement that debt issuance costs related to a debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The standard is effective for fiscal years beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. The Company is currently assessing the impact, if any, the guidance will have on its condensed consolidated financial statements.

Business_Disposals

Business Disposals	3 Months Ended
	Mar. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Business Disposals	UtilX
	On March 17, 2015, the Company sold all of its equity interests of UtilX Corporation ("UtilX") to Novinium, Inc. for approximately $40.0 million in cash, of which $0.5 million was deposited into an escrow account for a period of six months to cover post-closing adjustments and any indemnification obligations of the Company. The closing consideration is subject to working capital and other typical post-closing adjustments. The Company recorded a gain of $21.4 million in connection with this sale during the first quarter of 2015.
	Premier
	On March 31, 2015, the Company sold all of its membership units in Premier Utility Services, LLC ("Premier") to USIC Locating Services, LLC for approximately $51.0 million in cash, of which $4.0 million was deposited into an escrow account for a period of up to eighteen months to cover post-closing adjustments and any indemnification obligations of the Company. The closing consideration is subject to typical post-closing adjustments. The Company recorded a gain of $37.1 million in connection with this sale during the first quarter of 2015.
	The two business disposals discussed above do not qualify as discontinued operations in accordance with Accounting Standards Update ("ASU") 2014-08, which the Company adopted on January 1, 2015.
	Business Disposals
	The following business disposals qualify as discontinued operations as they were sold prior to the Company's adoption of ASU 2014-08 on January 1, 2015.
	CTS
	In the second quarter of 2014, the Company sold its CTS business to a private buyer. In connection with the disposition, the Company recorded total proceeds of $25.0 million and recognized a net loss on sale of $8.2 million. The net loss is inclusive of a non-cash charge of $15.0 million related to intangible assets associated with the sold business.
	Hawkeye
	In the fourth quarter of 2013, the Company sold certain assets comprising its Hawkeye business to Elecnor Hawkeye, LLC, a subsidiary of Elecnor, Inc. (“Elecnor”). In connection with the sale, the Company recorded total consideration of $27.7 million, subject to a post-closing working capital adjustment. At the closing, Elecnor delivered two letters of credit, one to the Company for $16.2 million and the other to the escrow agent for $8.0 million. The Company recognized a net loss on the sale of $2.7 million in the fourth quarter of 2013.
	In the first quarter of 2014, the Company received $21.2 million in cash consisting of full payment against the $16.2 million letter of credit and $5.0 million of the $8.0 million in escrow. The Company received $1.5 million of additional proceeds in 2014. In the second quarter of 2015, the Company entered into a settlement agreement under which the Company will receive $3.7 million of the remaining $5.0 million in proceeds during the second quarter of 2015.
	Former Nigeria-Based Operations
	Litigation and Settlement
	On March 29, 2012, the Company and Willbros Global Holdings, Inc., formerly known as Willbros Group, Inc., a Panama corporation (“WGHI”), which is now a subsidiary of the Company, entered into a settlement agreement (the “Settlement Agreement”) with WAPCo to settle a lawsuit filed against WGHI by WAPCo in 2010 under English law in the London High Court in which WAPCo was seeking $273.7 million plus costs and interest. The lawsuit was based upon a parent company guarantee issued by WGHI to WAPCo in connection with a Nigerian project undertaken by a WGHI subsidiary that was later sold to a third party. WAPCo alleged that the third party defaulted in the performance of the project and thereafter brought the lawsuit against WGHI under the parent company guarantee for its claimed losses.
	The Settlement Agreement required that WGHI make payments to WAPCo totaling $55.5 million. Payments made to WAPCo during 2012, 2013 and the second quarter of 2014 totaled $22.8 million. On December 30, 2014, the Company made a final payment to WAPCo of $32.7 million. The Company and WGHI have now fulfilled all of the terms of the Settlement Agreement.
	The Company currently has no employees working in Nigeria and does not intend to return to Nigeria.
	Results of Discontinued Operations
	Condensed Statements of Operations with respect to discontinued operations are as follows (in thousands):
		Three Months Ended March 31, 2015
		Hawkeye			CTS			Total
	Revenue	$	921		$	—		$	921
	Operating loss	(410		)	—			(410		)
	Pre-tax loss	(393		)	—			(393		)
	Net loss	(393		)	—			(393		)
		Three Months Ended March 31, 2014
		Hawkeye			CTS			Total
	Revenue	$	6,080		$	24,361		$	30,441
	Operating loss	(6,499		)	(1,377		)	(7,876		)
	Pre-tax loss	(6,617		)	(1,377		)	(7,994		)
	Net loss	(6,617		)	(1,377		)	(7,994		)
	Condensed Balance Sheets with respect to discontinued operations are as follows (in thousands):
		31-Mar-15
		Hawkeye
	Accounts receivable, net	$	5,513
	Contract cost and recognized income not yet billed	66
	Prepaid expenses	16
	Property, plant and equipment, net	111
	Other	—
	Total assets	5,706
	Accounts payable and accrued liabilities	$	4,336
	Other	404
	Total liabilities	4,740
	Net assets of discontinued operations	966
		31-Dec-14
		Hawkeye
	Accounts receivable, net	$	5,564
	Contract cost and recognized income not yet billed	66
	Property, plant and equipment, net	511
	Prepaid expenses	16
	Other	900
	Total assets	7,057
	Accounts payable and accrued liabilities	$	3,970
	Other	1,215
	Total liabilities	5,185
	Net assets of discontinued operations	1,872

Other_Charges

Other Charges	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Other Charges	Approximately $2.0 million in long-lived asset impairment charges, $0.7 million in lease abandonment charges, $0.5 million in employee severance charges and $0.3 million in the accelerated vesting of stock awards related to management changes and headcount reductions across the Company are included in the line item "Other charges" on the Condensed Consolidated Statement of Operations. Also included in this line item are $0.5 million in legal and accounting costs associated with the investigation of the root cause behind the deterioration of certain construction projects within the Oil & Gas segment which led to the restatements of the Company's Condensed Consolidated Financial Statements for the quarterly periods ended March 31, 2014 and June 30, 2014.
	Activity in the accrual related to other charges for the quarter ended March 31, 2015 is as follows (in thousands):
			Employee Termination and Other Benefits			Lease abandonment		Long-lived asset impairment			Accounting and legal fees associated with restatement			Total
	Accrued cost at December 31, 2014		$	397		$	—	$	—		$	3,413		$	3,810
	Costs recognized during Q1 2015		784			711		1,979			476			3,950
	Cash payments		(451		)	—					(3,114		)	(3,565		)
	Non-cash charges (1)		(272		)	—		(1,979		)	—			(2,251		)
	Accrued cost at March 31, 2015		$	458		$	711	$	—		$	775		$	1,944
	-1	Non-cash charges consist of $0.3 million of accelerated stock-based compensation and a $2.0 million long-lived asset impairment charge.

Contracts_in_Progress

Contracts in Progress	3 Months Ended
	Mar. 31, 2015
Contractors [Abstract]
Contracts in Progress	Contract cost and recognized income not yet billed on uncompleted contracts arise when recorded revenues for a contract exceed the amounts billed under the terms of the contracts. Contract billings in excess of cost and recognized income arise when billed amounts exceed revenues recorded. Amounts are billable to customers upon various measures of performance, including achievement of certain milestones, completion of specified units, or completion of the contract. Also included in contract cost and recognized income not yet billed on uncompleted contracts are amounts the Company seeks to collect from customers for change orders approved in scope but not for price associated with that scope change (unapproved change orders). Revenue for these amounts is recorded equal to the lesser of the expected revenue or cost incurred when realization of price approval is probable. Estimating revenues from unapproved change orders involves the use of estimates, and it is reasonably possible that revisions to the estimated recoverable amounts of recorded unapproved change orders may be made in the near-term. If the Company does not successfully resolve these matters, a reduction in revenues may be required to amounts that have been previously recorded.
	Contract cost and recognized income not yet billed and related amounts billed as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
		March 31,			December 31,
		2015			2014
	Cost incurred on contracts in progress	$	862,191		$	981,518
	Recognized income	75,884			90,994
		938,075			1,072,512
	Progress billings and advance payments	(918,735		)	(1,049,102		)
		$	19,340		$	23,410
	Contract cost and recognized income not yet billed	$	31,517		$	39,781
	Contract billings in excess of cost and recognized income	(12,177		)	(16,371		)
		$	19,340		$	23,410
	Contract cost and recognized income not yet billed includes $3.2 million and $2.8 million at March 31, 2015 and December 31, 2014, respectively, on completed contracts.
	The balances billed but not paid by customers pursuant to retainage provisions in certain contracts are generally due upon completion of the contracts and acceptance by the customer. Based on the Company’s experience with similar contracts in recent years, the majority of the retainage balances at each balance sheet date are expected to be collected within the next 12 months. Current retainage balances at March 31, 2015 and December 31, 2014, were approximately $28.1 million and $43.4 million, respectively, and are included in “Accounts receivable” in the Condensed Consolidated Balance Sheets. There were no retainage balances with settlement dates beyond the next 12 months at March 31, 2015 and December 31, 2014.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	The changes in the carrying amounts of intangible assets for the three months ended March 31, 2015 are detailed below (in thousands):
		Customer			Trademark /			Technology			Total
		Relationships			Tradename
	Balance as of December 31, 2014	$	105,604		$	7,505		$	3,021		$	116,130
	Amortization	(2,641		)	(332		)	(122		)	(3,095		)
	Additions	—			300			120			420
	Disposals	(10,829		)	(1,010		)	(2,903		)	(14,742		)
	Balance as of March 31, 2015	$	92,134		$	6,463		$	116		$	98,713
	Weighted Average Remaining Amortization Period	10.0 years			5.1 years			4.8 years
	Disposals relate to the intangible assets sold as part of the sales of UtilX and Premier during the first quarter of 2015. See Note 3 – Business Disposals for additional information associated with these disposals.
	Intangible assets are amortized on a straight-line basis over their estimated useful lives, which range from 5 to 15 years.
	Estimated amortization expense for the remainder of 2015 and each of the subsequent five years and thereafter is as follows (in thousands):
	Fiscal year:
	Remainder of 2015	$	8,049
	2016	10,732
	2017	10,732
	2018	10,732
	2019	10,614
	2020	9,142
	Thereafter	38,712
	Total amortization	$	98,713

Accounts_Payable_and_Accrued_L

Accounts Payable and Accrued Liabilities	3 Months Ended
	Mar. 31, 2015
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities as of March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,		December 31,
		2015		2014
	Trade accounts payable	$	82,648	$	82,557
	Payroll and payroll liabilities	39,118		44,483
	Accrued contract costs	24,002		34,791
	Self-insurance accrual	15,880		15,915
	Other accrued liabilities	17,210		29,567
	Total accounts payable and accrued liabilities	$	178,858	$	207,313

Longterm_Debt

Long-term Debt	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Long-term Debt	Long-term debt as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
			March 31,			December 31,
			2015			2014
	2014 Term Loan Facility		$	204,463		$	270,000
	Revolver borrowings under the 2013 ABL Credit Facility		—			—
	Capital lease obligations		1,166			1,384
	Other obligations		18,148			17,646
	Total debt		223,777			289,030
	Less: current portion		(8,689		)	(8,393		)
	Long-term debt, net		$	215,088		$	280,637
	2014 Term Loan Facility
	On December 15, 2014, the Company entered into a new credit agreement dated as of December 15, 2014 (the “2014 Term Credit Agreement”) among the Company, certain of its subsidiaries, as guarantors, the lenders from time to time party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and KKR Credit Advisors (US) LLC, as sole lead arranger and sole Bookrunner. The 2014 Term Credit Agreement replaced the six-year $250.0 million term loan facility maturing on August 7, 2019 with JP Morgan Chase Bank, N.A. serving as a sole administrative agent for the lenders thereunder (the “2013 Term Loan Facility”).
	The 2014 Term Credit Agreement provides for a $270.0 million term loan facility (the “2014 Term Loan Facility”), which the Company drew in full on the effective date of the 2014 Term Credit Agreement. Willbros Group, Inc. is the borrower under the 2014 Term Credit Agreement, with all of its obligations guaranteed by its material U.S. subsidiaries, other than excluded subsidiaries. Obligations under the 2014 Term Loan Facility are secured by a first priority security interest in, among other things, the borrower’s and the guarantors’ equipment, subsidiary capital stock and intellectual property (the “2014 Term Loan Priority Collateral”) and a second priority security interest in, among other things, the borrower’s and the guarantors’ inventory, accounts receivable, deposit accounts and similar assets.
	The term loans bear interest at the “Adjusted Base Rate” plus an applicable margin of 8.75 percent, or the “Eurodollar Rate” plus an applicable margin of 9.75 percent. The interest rate in effect at March 31, 2015 and 2014 was 11 percent, comprised of an applicable margin of 9.75 percent for Eurodollar rate loans plus a LIBOR floor of 1.25 percent.
	In the first quarter of 2015, the Company made early payments of approximately $64.8 million against its 2014 Term Loan Facility. As a result of these early payments, the Company recorded debt extinguishment charges of approximately $1.6 million, which consisted of prepayment premiums of 2 percent and the write-off of debt issuance costs.
	2013 ABL Credit Facility
	On August 7, 2013 the Company entered into a five-year $150.0 million asset based senior revolving credit facility maturing on August 7, 2018 with Bank of America, N.A. serving as sole administrative agent for the lenders thereunder, collateral agent, issuing bank and swingline lender (as amended by the First Amendment to Loan, Security and Guaranty Agreement dated as of August 30, 2013, the Second Amendment to Loan, Security and Guaranty Agreement dated as of April 1, 2014 and the Third Amendment to Loan, Security and Guaranty Agreement dated as of December 15, 2014 (the “Third Amendment”), the “2013 ABL Credit Facility”). The Third Amendment amended the 2013 ABL Credit Facility to take into account the refinancing of the Company’s 2013 Term Loan Facility pursuant to the 2014 Term Credit Agreement and to make certain changes to the definition of Consolidated EBITDA.
	The initial aggregate amount of commitments for the 2013 ABL Credit Facility is comprised of $125.0 million for the U.S. facility (the “U.S. Facility”) and $25.0 million for the Canadian facility (the “Canadian Facility”). The 2013 ABL Credit Facility includes a sublimit of $100.0 million for letters of credit and an accordion feature permitting the borrowers, under certain conditions, to increase the aggregate amount by an incremental $75.0 million, with additional commitments from existing lenders or new commitments from lenders reasonably acceptable to the administrative agent. The borrowers under the U.S. Facility consist of all of the Company’s U.S. operating subsidiaries with assets included in the borrowing base, and the U.S. Facility is guaranteed by Willbros Group, Inc. and its material U.S. subsidiaries, other than excluded subsidiaries. The borrower under the Canadian Facility is Willbros Construction Services (Canada) LP, and the Canadian Facility is guaranteed by Willbros Group, Inc. and all of its material U.S. and Canadian subsidiaries, other than excluded subsidiaries.
	Advances under the U.S. and Canadian Facility are limited to a borrowing base consisting of the sum of 85 percent of the value of “eligible accounts” and 60 percent of the value of “eligible unbilled accounts” less applicable reserves, which the administrative agent may establish from time to time in its permitted discretion. Eligible unbilled accounts may not exceed $50.0 million in the aggregate. Advances in U.S. dollars bear interest at a rate equal to LIBOR or the U.S. or Canadian base rate plus an additional margin. Advances in Canadian dollars bear interest at the Bankers Acceptance (“BA”) Equivalent Rate or the Canadian prime rate plus an additional margin.
	The interest rate margins will be adjusted each quarter based on the Company’s fixed charge coverage ratio as of the end of the previous quarter as follows:
	Fixed Charge Coverage Ratio		U.S. Base Rate, Canadian		LIBOR Loans, BA Rate Loans and
			Base Rate and Canadian		Letter of Credit Fees
			Prime Rate Loans
	>1.25 to 1		1.25%		2.25%
	<1.25 to 1 and 1.15 to 1		1.50%		2.50%
	<1.15 to 1		1.75%		2.75%
	The borrowers will also pay an unused line fee on each of the U.S. and Canadian Facilities equal to 50 basis points when usage under the applicable facility during the preceding calendar month is less than 50 percent of the commitments or 37.5 basis points when usage under the applicable facility equals or exceeds 50 percent of the commitments for such period. With respect to the letters of credit, the borrowers will pay a letter of credit fee equal to the applicable LIBOR margin, shown in the table above, on all letters of credit and a 0.125 percent fronting fee to the issuing bank, in each case, payable monthly in arrears.
	Obligations under the 2013 ABL Credit Facility are secured by a first priority security interest in the borrowers’ and guarantors’ accounts receivable, deposit accounts and similar assets (the “ABL Priority Collateral”) and a second priority security interest in the 2014 Term Loan Priority Collateral.
	Debt Covenants and Events of Default
	A default under the 2014 Term Loan Facility and the 2013 ABL Credit Facility may be triggered by events such as a failure to comply with financial covenants or other covenants under the 2014 Term Loan Facility and the 2013 ABL Credit Facility, a failure to make payments when due under the 2014 Term Loan Facility and the 2013 ABL Credit Facility, a failure to make payments when due in respect of, or a failure to perform obligations relating to, debt obligations in excess of $15.0 million, a change of control of the Company and certain insolvency proceedings. A default under the 2013 ABL Credit Facility would permit the lenders to terminate their commitment to make cash advances or issue letters of credit, require the immediate repayment of any outstanding cash advances with interest and require the cash collateralization of outstanding letter of credit obligations. A default under the 2014 Term Loan Facility would permit the lenders to require immediate repayment of all principal, interest, fees and other amounts payable thereunder.
	On March 31, 2015, (the "Closing Date"), the Company amended the 2014 Term Credit Agreement pursuant to a First Amendment (the "First Amendment"). The First Amendment, among other things, suspends the calculation of the Maximum Total Leverage Ratio and Minimum Interest Coverage Ratio covenants for the period from December 31, 2014 through March 31, 2016 (the "Covenant Suspension Period") and provides that any failure by the Company to comply with the Maximum Total Leverage Ratio or Minimum Interest Coverage Ratio during the Covenant Suspension Period shall not be deemed to result in a default or event of default. Prior to obtaining the First Amendment, the Company would not have complied with the Maximum Total Leverage Ratio and Minimum Interest Coverage Ratio at March 31, 2015.
	In consideration of the suspension of the calculation of the Maximum Total Leverage Ratio and Minimum Interest Coverage Ratio for the Covenant Suspension Period, the Company entered into a subscription agreement pursuant to which it issued approximately 10.1 million shares, which is equivalent to 19.9 percent of the outstanding shares of common stock immediately prior to the Closing Date of the First Amendment, to KKR Lending Partners II L.P. and other entities indirectly advised by KKR Credit Advisers (US), LLC. In connection with this transaction, the Company recorded debt covenant suspension charges of approximately $33.5 million which represents the fair value of the 10.1 million outstanding shares of common stock issued, multiplied by the closing stock price on the Closing Date. In addition, the Company recorded debt extinguishment charges of approximately $0.8 million related to the write-off of debt issuance costs associated with the Company's 2014 Term Loan Facility.
	The Company’s primary sources of capital are its cash on hand, proceeds from asset sales, operating cash flows and borrowings under the 2013 ABL Credit Facility. Based on current forecasts, through a combination of these sources, the Company expects to have sufficient liquidity and capital resources to meet its obligations for at least the next twelve months. However, the Company can make no assurances regarding its ability to achieve its forecasts.
	As of March 31, 2015, the Company did not have any outstanding revolver borrowings. The Company’s unused availability under its March 31, 2015 borrowing base certificate was $83.6 million on a borrowing base of $133.6 million and outstanding letters of credit of $50.0 million. If the Company’s unused availability under the 2013 ABL Credit Facility is less than the greater of (i) 15 percent of the revolving commitments or $22.5 million for five consecutive days, or (ii) 12.5 percent of the revolving commitments or $18.8 million at any time, or upon the occurrence of certain events of default under the 2013 ABL Credit Facility, the Company is subject to increased reporting requirements, the administrative agent shall have exclusive control over any deposit account, the Company will not have any right of access to, or withdrawal from, any deposit account, or any right to direct the disposition of funds in any deposit account, and amounts in any deposit account will be applied to reduce the outstanding amounts under the 2013 ABL Credit Facility. In addition, if the Company's unused availability under the 2013 ABL Credit Facility is less than the amounts described above, the Company would be required to comply with a Minimum Fixed Charge Coverage Ratio of 1.15 to 1. Based on current forecasts, the Company does not expect its unused availability under the 2013 ABL Credit Facility to be less than the amounts described above and therefore does not expect the Minimum Fixed Charge Coverage Ratio to be applicable over the next twelve months. If the Minimum Fixed Charge Coverage Ratio were to become applicable, the Company would not expect to be in compliance over the next twelve months and would therefore be in default under its credit agreements.
	The 2014 Term Credit Agreement and the 2013 ABL Credit Facility also include customary representations and warranties and affirmative and negative covenants, including:
	•	the preparation of financial statements in accordance with GAAP;
	•	the identification of any events or circumstances, either individually or in the aggregate, that has had or could reasonably be expected to have a material adverse effect on the business, results of operations, properties or condition of the Company;
	•	limitations on liens and indebtedness;
	•	limitations on dividends and other payments in respect of capital stock;
	•	limitations on capital expenditures; and
	•	limitations on modifications of the documentation of the 2013 ABL Credit Facility.
	Fair Value of Debt
	The estimated fair value of the Company’s debt instruments as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
			March 31,			December 31,
			2015			2014
	2014 Term Loan Facility		$	204,463		$	270,000
	Revolver borrowings under the 2013 ABL Credit Facility		—			—
	Capital lease obligations		1,166			1,384
	Other obligations		18,148			17,646
	Total fair value of debt instruments		$	223,777		$	289,030
	The 2014 Term Loan Facility, revolver borrowings under the 2013 ABL Credit Facility, capital lease obligations and other obligations are classified within Level 2 of the fair value hierarchy. The fair values of the 2014 Term Loan Facility have been estimated using discounted cash flow analyses based on the Company’s incremental borrowing rate for similar borrowing arrangements. A significant increase or decrease in the inputs could result in a directionally opposite change in the fair value of the 2014 Term Loan Facility.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	The effective tax rate on continuing operations was negative 3.5 percent and negative 27.5 percent for the three months ended March 31, 2015 and 2014, respectively. Tax benefit for discrete items for the three months ended March 31, 2015 was approximately $0.4 million. This amount is composed primarily of a state tax refund. Tax expense for the three months ended March 31, 2015 was $0.3 million, mainly due to Canadian Tax and Texas Margins Tax offset by the tax benefit from a tax refund. The Company has not recorded the benefit of current year losses in the United States. As of March 31, 2015, U.S. federal and state deferred tax assets continue to be covered by valuation allowances. The ultimate realization of deferred tax assets is dependent upon the generation of future U.S. taxable income. The Company considers the impacts of reversing taxable temporary differences, future forecasted income and available tax planning strategies when forecasting future taxable income and in evaluating whether deferred tax assets are more likely than not to be realized.
	In April 2011, the Company discontinued its strategy of reinvesting foreign earnings in foreign operations. This change in strategy continues through the first quarter of 2015. The Company does not anticipate recording tax expense related to future repatriations of foreign earnings to the U.S.
	The Company expects that the statute of limitations will expire on uncertain tax positions within the next 12 months. Assuming that the statute of limitations expires, the Company would release reserves in the amount of $0.1 million.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholders' Equity	Changes in Accumulated Other Comprehensive Income (Loss) by Component
		Three Months Ended March 31, 2015 (in thousands)
		Foreign currency			Changes in			Total
		translation			derivative			accumulated
		adjustments			financial			comprehensive
					instruments			income (loss)
	Balance as of December 31, 2014	$	6,863		$	(4,075	)	$	2,788
	Other comprehensive loss before reclassifications	(4,651		)	(979		)	(5,630		)
	Amounts reclassified from accumulated other comprehensive income (loss)	—			489			489
	Net current-period other comprehensive loss	(4,651		)	(490		)	(5,141		)
	Balance as of March 31, 2015	$	2,212		$	(4,565	)	$	(2,353	)
		Three Months Ended March 31, 2014 (in thousands)
		Foreign currency			Changes in			Total
		translation			derivative			accumulated
		adjustments			financial			comprehensive
					instruments			income
	Balance as of December 31, 2013	$	11,280		$	(2,473	)	$	8,807
	Other comprehensive loss before reclassifications	(2,063		)	(1,034		)	(3,097		)
	Amounts reclassified from accumulated other comprehensive income (loss)	—			249			249
	Net current-period other comprehensive loss	(2,063		)	(785		)	(2,848		)
	Balance as of March 31, 2014	$	9,217		$	(3,258	)	$	5,959
	Reclassifications out of Accumulated Other Comprehensive Income
	Three Months Ended March 31, 2015 (in thousands)
	Details about Accumulated Other	Amount Reclassified from Accumulated Other  Comprehensive Income			Details about Accumulated Other Comprehensive Income Components
	Comprehensive Income Components
	Interest rate contracts	$	489		Interest expense, net
	Total	$	489
	Three Months Ended March 31, 2014 (in thousands)
	Details about Accumulated Other	Amount Reclassified from Accumulated Other  Comprehensive Income			Details about Accumulated Other Comprehensive Income Components
	Comprehensive Income Components
	Interest rate contracts	$	249		Interest expense, net
	Total	$	249

Income_Loss_Per_Share

Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Income (Loss) Per Share	Basic income (loss) per share is computed by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted income (loss) per share is based on the weighted average number of shares outstanding during each period and the assumed exercise of potentially dilutive stock options and vesting of restricted stock units less the number of treasury shares assumed to be purchased from the proceeds using the average market price of the Company’s stock for each of the periods presented.
	Basic and diluted income (loss) per common share from continuing operations is computed as follows (in thousands, except share and per share amounts):
		Three Months Ended
		March 31,
		2015				2014
	Net loss from continuing operations applicable to common shares (numerator for basic and diluted calculation)	$	(9,431	)		$	(16,996	)
	Weighted average number of common shares outstanding for basic loss per share	49,819,388				48,847,349
	Weighted average number of potentially dilutive common shares outstanding	—				—
	Weighted average number of common shares outstanding for diluted loss per share	49,819,388				48,847,349
	Loss per common share from continuing operations:
	Basic	$	(0.19	)		$	(0.35	)
	Diluted	$	(0.19	)		$	(0.35	)
	The Company has excluded shares potentially issuable under the terms of use of the securities listed below from the computation of diluted income per share, as the effect would be anti-dilutive:
		Three Months Ended
		March 31,
		2015			2014
	Stock options	227,750			185,290
	Restricted stock and restricted stock rights	571,137			889,179
		798,887			1,074,469

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Information	The Company’s segments are comprised of strategic businesses that are defined by the industries or geographic regions they serve. Each is managed as an operation with well-established strategic directions and performance requirements.
	Management evaluates the performance of each operating segment based on operating income. To support the segments, the Company has a focused corporate operation led by the executive management team, which, in addition to oversight and leadership, provides general, administrative and financing functions for the organization. The costs to provide these services are allocated, as are certain other corporate costs, to the four operating segments.
	The following tables reflect the Company’s operations by reportable segment for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended March 31, 2015
		Oil & Gas			Utility T&D			Professional			Canada			Eliminations			Consolidated
								Services
	Contract revenue	$	76,440		$	86,986		$	100,141		$	87,009		$	(3,644	)	$	346,932
	Contract operating expenses	77,386			83,167			88,702			82,032			(3,644		)	327,643
	Amortization of intangibles	81			2,390			624			—			—			3,095
	General and administrative	9,119			5,597			15,116			5,800			—			35,632
	Gain on sale of subsidiaries	—			—			—			—			—			(58,549		)
	Other charges	829			692			1,737			692			—			3,950
	Operating income (loss)	$	(10,975	)	$	(4,860	)	$	(6,038	)	$	(1,515	)	$	—		35,161
	Non-operating expenses																(44,275		)
	Provision for income taxes																317
	Loss from continuing operations																(9,431		)
	Loss from discontinued operations net of provision for income taxes																(393		)
	Net loss																$	(9,824	)
	Other charges incurred during the first quarter of 2015 include $2.8 million related to the Company's corporate operations and have been allocated to each segment based on a percentage of total revenue.
		Three Months Ended March 31, 2014
		Oil & Gas			Utility T&D			Professional			Canada			Eliminations			Consolidated
								Services
	Contract revenue	$	177,529		$	83,521		$	100,095		$	117,079		$	(1,686	)	$	476,538
	Contract operating expenses	186,338			76,777			83,614			96,953			(1,686		)	441,996
	Amortization of intangibles	82			2,390			647			—			—			3,119
	General and administrative	12,121			3,940			14,156			6,855			—			37,072
	Operating income (loss)	$	(21,012	)	$	414		$	1,678		$	13,271		$	—		(5,649		)
	Non-operating expenses																(7,678		)
	Provision for income taxes																3,669
	Loss from continuing operations																(16,996		)
	Loss from discontinued operations net of provision for income taxes																(7,994		)
	Net loss																$	(24,990	)
	Total assets by segment as of March 31, 2015 and December 31, 2014 are presented below (in thousands):
		March 31,			December 31,
		2015			2014
	Oil & Gas	$	127,540		$	179,305
	Utility T&D	219,446			228,094
	Professional Services	107,881			137,784
	Canada	97,161			95,270
	Corporate	55,469			44,697
	Total assets, continuing operations	$	607,497		$	685,150

Contingencies_Commitments_and_

Contingencies, Commitments and Other Circumstances	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingencies, Commitments and Other Circumstances	Contingencies
	Central Maine Power
	On January 20, 2014, the Company settled a lawsuit against Central Maine Power Company (“CMP”) in connection with an existing project to install transmission lines and perform construction services for CMP, for the project generally known as the Transmission Line Construction of the Southern Loop and Southern Connector portion of the Maine Power Reliability Program (the “MPRP Project”). Under terms of the settlement, CMP made a payment to the Company in the first quarter of 2014 of $20.1 million, which consisted of $17.0 million in settlement proceeds and $3.1 million as an early payment of retention. In addition, CMP extended the schedule and provided other relief on the remainder of the MPRP Project. The impact of the settlement on operating results was recognized in the fourth quarter of 2013. The Company substantially completed the MPRP Project during the third quarter of 2014.
	Litigation and Regulatory Matters Related to the Company’s October 21, 2014 Press Release Announcing the Restatement of Condensed Consolidated Financial Statements for the Quarterly Period Ended June 30, 2014
	After the Company announced it would be restating its Condensed Consolidated Financial Statements for the quarterly period ended June 30, 2014, a complaint was filed in the United States District Court for the Southern District of Texas on October 28, 2014 seeking class action status on behalf of purchasers of the Company’s stock and alleging damages on their behalf arising from the matters that led to the restatement. The original defendants in the case are the Company and its former chief executive officer and current chief financial officer. On January 31, 2015, the court named two employee retirement systems as Lead Plaintiffs. On March 31, 2015, a consolidated complaint was filed in which the current chief executive officer of the Company was added as a defendant. The complaint in the case, now entitled In re Willbros Group, Inc. Securities Litigation, alleges violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, arising out of the restatements of the Company’s first and second quarter 2014 financial statements and seeks undisclosed damages. The Company intends to file a motion to dismiss the case. As this matter is at a very early stage, the Company is not able at this time to determine the likelihood of loss, if any, arising from this matter. The Company believes the claims are without merit and intends to defend against them vigorously.
	In addition, two shareholder derivative complaints have been filed, one of which is now dismissed. The first, Markovich v. Harl et al, was filed on November 6, 2014 in the District Court of Harris County, Texas. The second, Kumararatne v. McNabb et al, was filed on March 4, 2015 in the United States District Court for the Southern District of Texas, but was voluntarily dismissed by the complainant on April 23, 2015. The remaining lawsuit is filed on behalf of the Company naming certain current and former officers and members of the Company's board of directors as defendants and the Company as a nominal defendant. The complaint alleges that the officer and board member defendants breached their fiduciary duties by permitting the Company's internal controls to be inadequate, wasted corporate assets and were unjustly enriched. The defendants have sought dismissal on the grounds that the plaintiff failed to make demand upon the Company’s board to bring the suit. As this matter is at a very early stage, the Company is not able at this time to determine the likely outcome.
	Other
	The Securities and Exchange Commission ("SEC") issued an order of investigation on January 29, 2015 and a subpoena on February 3, 2015, requesting information regarding the restatement of the Company's previously issued condensed consolidated financial statements for the quarterly periods ended March 31, 2014 and June 30, 2014. The Company has been fully cooperating and intends to continue providing full cooperation with the SEC.
	In addition to the matters discussed above and in Note 15 - Discontinued Operations, the Company is party to a number of other legal proceedings. Management believes that the nature and number of these proceedings are typical for a firm of similar size engaged in a similar type of business and that none of these proceedings is material to the Company’s consolidated results of operations, financial position or cash flows.
	Commitments
	From time to time, the Company enters into commercial commitments, usually in the form of commercial and standby letters of credit, surety bonds and financial guarantees. Contracts with the Company’s customers may require the Company to secure letters of credit or surety bonds with regard to the Company’s performance of contracted services. In such cases, the commitments can be called upon in the event of failure to perform contracted services. Likewise, contracts may allow the Company to issue letters of credit or surety bonds in lieu of contract retention provisions, where the client withholds a percentage of the contract value until project completion or expiration of a warranty period. Retention commitments can be called upon in the event of warranty or project completion issues, as prescribed in the contracts. At March 31, 2015, the Company had approximately $50.0 million of outstanding letters of credit, all of which related to continuing operations. This amount represents the maximum amount of payments the Company could be required to make if these letters of credit are drawn upon. Additionally, the Company issues surety bonds customarily required by commercial terms on construction projects. At March 31, 2015, the Company had bonds outstanding, primarily performance bonds, with a face value at $395.4 million related to continuing operations. This amount represents the bond penalty amount of future payments the Company could be required to make if the Company fails to perform its obligations under such contracts. The performance bonds do not have a stated expiration date; rather, each is released when the contract is accepted by the owner. The Company’s maximum exposure as it relates to the value of the bonds outstanding is lowered on each bonded project as the cost to complete is reduced. As of March 31, 2015, no liability has been recognized for letters of credit or surety bonds.
	Other Circumstances
	The Company has the usual liability of contractors for the completion of contracts and the warranty of its work. In addition, the Company acts as prime contractor on a majority of the projects it undertakes and is normally responsible for the performance of the entire project, including subcontract work. Management is not aware of any material exposure related thereto which has not been provided for in the accompanying Condensed Consolidated Financial Statements.

Fair_Value_Measurements

Fair Value Measurements

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

The FASB’s standard on fair value measurements defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance.

Fair Value Hierarchy

The FASB’s standard on fair value measurements establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. This standard establishes three levels of inputs that may be used to measure fair value:

Level 1 – Quoted prices in active markets for identical assets or liabilities.

Level 2 – Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities.

Level 3 – Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.

The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, notes payable, long-term debt and interest rate contracts. The fair value estimates of the Company’s financial instruments have been determined using available market information and appropriate valuation methodologies and approximate carrying value.

Financial Instruments Measured at Fair Value on a Recurring Basis

The Company measures certain financial instruments at fair value on a recurring basis. The fair value of these financial instruments (in thousands) was determined using the following inputs as of March 31, 2015 and December 31, 2014:

31-Mar-15

Total

Quoted Prices in

Significant

Significant

Active Markets for

Other

Other

Identical Assets

Observable

Unobservable

(Level 1)

Inputs (Level 2)

Inputs (Level 3)

Liabilities:

Interest rate swaps

$

4,565

$

—

$

4,565

$

—

31-Dec-14

Total

Quoted Prices in

Significant

Significant

Active Markets

Other

Other

for Identical

Observable

Unobservable

Assets (Level 1)

Inputs (Level 2)

Inputs (Level 3)

Liabilities:

Interest rate swaps

$

4,075

$

—

$

4,075

$

—

Hedging Arrangements

The Company attempts to negotiate contracts that provide for payment in U.S. dollars, but it may be required to take all or a portion of payment under a contract in another currency. To mitigate non-U.S. currency exchange risk, the Company seeks to match anticipated non-U.S. currency revenue with expenses in the same currency whenever possible. To the extent it is unable to match non-U.S. currency revenue with expenses in the same currency, the Company may use forward contracts, options or other common hedging techniques in the same non-U.S. currencies. The Company had no derivative financial instruments to hedge currency risk at March 31, 2015 or December 31, 2014.

Interest Rate Swaps

The Company is subject to hedging arrangements to fix or otherwise limit the interest cost of its variable interest rate borrowings. The Company is subject to interest rate risk on its debt and investment of cash and cash equivalents arising in the normal course of business. The Company does not engage in speculative trading strategies.

In August 2013, the Company entered into an interest rate swap agreement for a notional amount of $124.1 million to hedge changes in the variable rate interest expense on $124.1 million of its existing or replacement LIBOR indexed debt. Under the swap agreement, which is effective June 30, 2014 through August 7, 2019, the Company receives interest at either one-month LIBOR or 1.25 percent (whichever is greater) and pays interest at a fixed rate of 2.84 percent. The swap is designated and qualifies as a cash flow hedging instrument with the effective portion of the swap’s change in fair value recorded in Other Comprehensive Income (“OCI”). The swap is highly effective in offsetting changes in interest expense and no hedge ineffectiveness has been recorded in the Condensed Consolidated Statements of Operations. Amounts in OCI will be reclassified to interest expense when the hedged interest payments on the underlying debt are recognized.

In September 2010, the Company entered into two interest rate swap agreements for a total notional amount of $150.0 million to hedge changes in the variable rate interest expense on $150.0 million of its then existing or replacement LIBOR indexed debt. Under each swap agreement, the Company received interest at either three-month LIBOR or 2 percent (whichever was greater) and paid interest at a fixed rate of 2.68 percent through June 30, 2014. Through August 7, 2013, the swap agreements were designated and qualified as cash flow hedging instruments, with the effective portion of the swaps’ change in fair value recorded in OCI. Amounts in OCI were reclassified to interest expense when the hedged interest payments on the underlying debt were recognized during the period when the swaps were designated as cash flow hedges. Through August 7, 2013, the swaps were highly effective hedges, and only an immaterial amount of hedge ineffectiveness was recorded in the Condensed Consolidated Statements of Operations. On August 7, 2013, the swaps were de-designated due to the refinancing of the underlying debt, which decreased the interest rate floor from 2 percent to 1.25 percent. In addition, on August 7, 2013, each swap agreement was transferred to another party through a novation transaction, which increased the Company’s interest rate to 2.70 percent through June 30, 2014. Changes in the value of the swaps that remain open are reported in earnings and were immaterial for the three months ended March 31, 2015.

The carrying amount and fair value of these swap agreements are equivalent since the Company accounts for these instruments at fair value. The values, as identified below (in thousands), are derived from pricing models using inputs based upon market information, including contractual terms, market prices and yield curves. The inputs to the valuation pricing models are observable in the market, and as such are generally classified as Level 2 in the fair value hierarchy. For validation purposes, the swap valuations are periodically compared to those produced by swap counterparties. Amounts of OCI relating to the interest rate swaps expected to be recognized in interest expense in the coming twelve months totaled $1.9 million.

Liability Derivatives

31-Mar-15

31-Dec-14

Balance Sheet

Fair

Balance Sheet

Fair Value

Location

Value

Location

Interest rate contracts- swaps

Other current

$

1,863

Other current

$

1,865

liabilities

liabilities

Interest rate contracts- swaps

Other long-term

2,702

Other long-term

2,210

liabilities

liabilities

Total derivatives

$

4,565

$

4,075

For the Three Months Ended March 31,

Derivatives in ASC 815 Cash Flow

Amount of Gain Recognized in OCI on Derivative (Effective Portion)

Location of Gain or (Loss)

Amount of Loss Reclassified

Hedging Relationships

Reclassified from

from Accumulated OCI into

Accumulated OCI into Income (Effective Portion)

Income (Effective Portion)

2015

2014

2015

2014

Interest rate contracts

$

(979

)

$

(1,034

)

Interest expense, net

$

489

$

249

Total

$

(979

)

$

(1,034

)

$

489

$

249

Discontinued_Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	UtilX
	On March 17, 2015, the Company sold all of its equity interests of UtilX Corporation ("UtilX") to Novinium, Inc. for approximately $40.0 million in cash, of which $0.5 million was deposited into an escrow account for a period of six months to cover post-closing adjustments and any indemnification obligations of the Company. The closing consideration is subject to working capital and other typical post-closing adjustments. The Company recorded a gain of $21.4 million in connection with this sale during the first quarter of 2015.
	Premier
	On March 31, 2015, the Company sold all of its membership units in Premier Utility Services, LLC ("Premier") to USIC Locating Services, LLC for approximately $51.0 million in cash, of which $4.0 million was deposited into an escrow account for a period of up to eighteen months to cover post-closing adjustments and any indemnification obligations of the Company. The closing consideration is subject to typical post-closing adjustments. The Company recorded a gain of $37.1 million in connection with this sale during the first quarter of 2015.
	The two business disposals discussed above do not qualify as discontinued operations in accordance with Accounting Standards Update ("ASU") 2014-08, which the Company adopted on January 1, 2015.
	Business Disposals
	The following business disposals qualify as discontinued operations as they were sold prior to the Company's adoption of ASU 2014-08 on January 1, 2015.
	CTS
	In the second quarter of 2014, the Company sold its CTS business to a private buyer. In connection with the disposition, the Company recorded total proceeds of $25.0 million and recognized a net loss on sale of $8.2 million. The net loss is inclusive of a non-cash charge of $15.0 million related to intangible assets associated with the sold business.
	Hawkeye
	In the fourth quarter of 2013, the Company sold certain assets comprising its Hawkeye business to Elecnor Hawkeye, LLC, a subsidiary of Elecnor, Inc. (“Elecnor”). In connection with the sale, the Company recorded total consideration of $27.7 million, subject to a post-closing working capital adjustment. At the closing, Elecnor delivered two letters of credit, one to the Company for $16.2 million and the other to the escrow agent for $8.0 million. The Company recognized a net loss on the sale of $2.7 million in the fourth quarter of 2013.
	In the first quarter of 2014, the Company received $21.2 million in cash consisting of full payment against the $16.2 million letter of credit and $5.0 million of the $8.0 million in escrow. The Company received $1.5 million of additional proceeds in 2014. In the second quarter of 2015, the Company entered into a settlement agreement under which the Company will receive $3.7 million of the remaining $5.0 million in proceeds during the second quarter of 2015.
	Former Nigeria-Based Operations
	Litigation and Settlement
	On March 29, 2012, the Company and Willbros Global Holdings, Inc., formerly known as Willbros Group, Inc., a Panama corporation (“WGHI”), which is now a subsidiary of the Company, entered into a settlement agreement (the “Settlement Agreement”) with WAPCo to settle a lawsuit filed against WGHI by WAPCo in 2010 under English law in the London High Court in which WAPCo was seeking $273.7 million plus costs and interest. The lawsuit was based upon a parent company guarantee issued by WGHI to WAPCo in connection with a Nigerian project undertaken by a WGHI subsidiary that was later sold to a third party. WAPCo alleged that the third party defaulted in the performance of the project and thereafter brought the lawsuit against WGHI under the parent company guarantee for its claimed losses.
	The Settlement Agreement required that WGHI make payments to WAPCo totaling $55.5 million. Payments made to WAPCo during 2012, 2013 and the second quarter of 2014 totaled $22.8 million. On December 30, 2014, the Company made a final payment to WAPCo of $32.7 million. The Company and WGHI have now fulfilled all of the terms of the Settlement Agreement.
	The Company currently has no employees working in Nigeria and does not intend to return to Nigeria.
	Results of Discontinued Operations
	Condensed Statements of Operations with respect to discontinued operations are as follows (in thousands):
		Three Months Ended March 31, 2015
		Hawkeye			CTS			Total
	Revenue	$	921		$	—		$	921
	Operating loss	(410		)	—			(410		)
	Pre-tax loss	(393		)	—			(393		)
	Net loss	(393		)	—			(393		)
		Three Months Ended March 31, 2014
		Hawkeye			CTS			Total
	Revenue	$	6,080		$	24,361		$	30,441
	Operating loss	(6,499		)	(1,377		)	(7,876		)
	Pre-tax loss	(6,617		)	(1,377		)	(7,994		)
	Net loss	(6,617		)	(1,377		)	(7,994		)
	Condensed Balance Sheets with respect to discontinued operations are as follows (in thousands):
		31-Mar-15
		Hawkeye
	Accounts receivable, net	$	5,513
	Contract cost and recognized income not yet billed	66
	Prepaid expenses	16
	Property, plant and equipment, net	111
	Other	—
	Total assets	5,706
	Accounts payable and accrued liabilities	$	4,336
	Other	404
	Total liabilities	4,740
	Net assets of discontinued operations	966
		31-Dec-14
		Hawkeye
	Accounts receivable, net	$	5,564
	Contract cost and recognized income not yet billed	66
	Property, plant and equipment, net	511
	Prepaid expenses	16
	Other	900
	Total assets	7,057
	Accounts payable and accrued liabilities	$	3,970
	Other	1,215
	Total liabilities	5,185
	Net assets of discontinued operations	1,872

New_Accounting_Pronouncements_

New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	In April 2015, the FASB issued guidance that simplifies the presentation of debt issuance costs with the requirement that debt issuance costs related to a debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The standard is effective for fiscal years beginning after December 15, 2015, and interim periods within fiscal years beginning after December 15, 2016. The Company is currently assessing the impact, if any, the guidance will have on its condensed consolidated financial statements.

Other_Charges_Tables

Other Charges (Tables)	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Activity in the accrual related to other charges for the quarter ended March 31, 2015 is as follows (in thousands):
			Employee Termination and Other Benefits			Lease abandonment		Long-lived asset impairment			Accounting and legal fees associated with restatement			Total
	Accrued cost at December 31, 2014		$	397		$	—	$	—		$	3,413		$	3,810
	Costs recognized during Q1 2015		784			711		1,979			476			3,950
	Cash payments		(451		)	—					(3,114		)	(3,565		)
	Non-cash charges (1)		(272		)	—		(1,979		)	—			(2,251		)
	Accrued cost at March 31, 2015		$	458		$	711	$	—		$	775		$	1,944
	-1	Non-cash charges consist of $0.3 million of accelerated stock-based compensation and a $2.0 million long-lived asset impairment charge.

Contracts_in_Progress_Tables

Contracts in Progress (Tables)	3 Months Ended
	Mar. 31, 2015
Contractors [Abstract]
Schedule of Contract Cost and Recognized Income Not Yet Billed and Related Amounts	Contract cost and recognized income not yet billed and related amounts billed as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
		March 31,			December 31,
		2015			2014
	Cost incurred on contracts in progress	$	862,191		$	981,518
	Recognized income	75,884			90,994
		938,075			1,072,512
	Progress billings and advance payments	(918,735		)	(1,049,102		)
		$	19,340		$	23,410
	Contract cost and recognized income not yet billed	$	31,517		$	39,781
	Contract billings in excess of cost and recognized income	(12,177		)	(16,371		)
		$	19,340		$	23,410

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in the Carrying Amounts of Intangible Assets	The changes in the carrying amounts of intangible assets for the three months ended March 31, 2015 are detailed below (in thousands):
		Customer			Trademark /			Technology			Total
		Relationships			Tradename
	Balance as of December 31, 2014	$	105,604		$	7,505		$	3,021		$	116,130
	Amortization	(2,641		)	(332		)	(122		)	(3,095		)
	Additions	—			300			120			420
	Disposals	(10,829		)	(1,010		)	(2,903		)	(14,742		)
	Balance as of March 31, 2015	$	92,134		$	6,463		$	116		$	98,713
	Weighted Average Remaining Amortization Period	10.0 years			5.1 years			4.8 years
Estimated Amortization Expense	Estimated amortization expense for the remainder of 2015 and each of the subsequent five years and thereafter is as follows (in thousands):
	Fiscal year:
	Remainder of 2015	$	8,049
	2016	10,732
	2017	10,732
	2018	10,732
	2019	10,614
	2020	9,142
	Thereafter	38,712
	Total amortization	$	98,713

Accounts_Payable_and_Accrued_L1

Accounts Payable and Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities as of March 31, 2015 and December 31, 2014 were as follows (in thousands):
		March 31,		December 31,
		2015		2014
	Trade accounts payable	$	82,648	$	82,557
	Payroll and payroll liabilities	39,118		44,483
	Accrued contract costs	24,002		34,791
	Self-insurance accrual	15,880		15,915
	Other accrued liabilities	17,210		29,567
	Total accounts payable and accrued liabilities	$	178,858	$	207,313

Longterm_Debt_Tables

Long-term Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Long Term Debt	Long-term debt as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
		March 31,			December 31,
		2015			2014
	2014 Term Loan Facility	$	204,463		$	270,000
	Revolver borrowings under the 2013 ABL Credit Facility	—			—
	Capital lease obligations	1,166			1,384
	Other obligations	18,148			17,646
	Total debt	223,777			289,030
	Less: current portion	(8,689		)	(8,393		)
	Long-term debt, net	$	215,088		$	280,637
Schedule of Interest Rate Margins	The interest rate margins will be adjusted each quarter based on the Company’s fixed charge coverage ratio as of the end of the previous quarter as follows:
	Fixed Charge Coverage Ratio	U.S. Base Rate, Canadian		LIBOR Loans, BA Rate Loans and
		Base Rate and Canadian		Letter of Credit Fees
		Prime Rate Loans
	>1.25 to 1	1.25%		2.25%
	<1.25 to 1 and 1.15 to 1	1.50%		2.50%
	<1.15 to 1	1.75%		2.75%
Fair Value of Debt Instruments	The estimated fair value of the Company’s debt instruments as of March 31, 2015 and December 31, 2014 was as follows (in thousands):
		March 31,			December 31,
		2015			2014
	2014 Term Loan Facility	$	204,463		$	270,000
	Revolver borrowings under the 2013 ABL Credit Facility	—			—
	Capital lease obligations	1,166			1,384
	Other obligations	18,148			17,646
	Total fair value of debt instruments	$	223,777		$	289,030

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income by Component	Changes in Accumulated Other Comprehensive Income (Loss) by Component
		Three Months Ended March 31, 2015 (in thousands)
		Foreign currency			Changes in			Total
		translation			derivative			accumulated
		adjustments			financial			comprehensive
					instruments			income (loss)
	Balance as of December 31, 2014	$	6,863		$	(4,075	)	$	2,788
	Other comprehensive loss before reclassifications	(4,651		)	(979		)	(5,630		)
	Amounts reclassified from accumulated other comprehensive income (loss)	—			489			489
	Net current-period other comprehensive loss	(4,651		)	(490		)	(5,141		)
	Balance as of March 31, 2015	$	2,212		$	(4,565	)	$	(2,353	)
		Three Months Ended March 31, 2014 (in thousands)
		Foreign currency			Changes in			Total
		translation			derivative			accumulated
		adjustments			financial			comprehensive
					instruments			income
	Balance as of December 31, 2013	$	11,280		$	(2,473	)	$	8,807
	Other comprehensive loss before reclassifications	(2,063		)	(1,034		)	(3,097		)
	Amounts reclassified from accumulated other comprehensive income (loss)	—			249			249
	Net current-period other comprehensive loss	(2,063		)	(785		)	(2,848		)
	Balance as of March 31, 2014	$	9,217		$	(3,258	)	$	5,959
Reclassifications Out of Accumulated Other Comprehensive Income	Reclassifications out of Accumulated Other Comprehensive Income
	Three Months Ended March 31, 2015 (in thousands)
	Details about Accumulated Other	Amount Reclassified from Accumulated Other  Comprehensive Income			Details about Accumulated Other Comprehensive Income Components
	Comprehensive Income Components
	Interest rate contracts	$	489		Interest expense, net
	Total	$	489
	Three Months Ended March 31, 2014 (in thousands)
	Details about Accumulated Other	Amount Reclassified from Accumulated Other  Comprehensive Income			Details about Accumulated Other Comprehensive Income Components
	Comprehensive Income Components
	Interest rate contracts	$	249		Interest expense, net
	Total	$	249

Income_Loss_Per_Share_Tables

Income (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Income (Loss) Per Common Share from Continuing Operations	Basic and diluted income (loss) per common share from continuing operations is computed as follows (in thousands, except share and per share amounts):
		Three Months Ended
		March 31,
		2015				2014
	Net loss from continuing operations applicable to common shares (numerator for basic and diluted calculation)	$	(9,431	)		$	(16,996	)
	Weighted average number of common shares outstanding for basic loss per share	49,819,388				48,847,349
	Weighted average number of potentially dilutive common shares outstanding	—				—
	Weighted average number of common shares outstanding for diluted loss per share	49,819,388				48,847,349
	Loss per common share from continuing operations:
	Basic	$	(0.19	)		$	(0.35	)
	Diluted	$	(0.19	)		$	(0.35	)
Schedule of Potentially Dilutive Shares	The Company has excluded shares potentially issuable under the terms of use of the securities listed below from the computation of diluted income per share, as the effect would be anti-dilutive:
		Three Months Ended
		March 31,
		2015			2014
	Stock options	227,750			185,290
	Restricted stock and restricted stock rights	571,137			889,179
		798,887			1,074,469

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The following tables reflect the Company’s operations by reportable segment for the three months ended March 31, 2015 and 2014 (in thousands):
		Three Months Ended March 31, 2015
		Oil & Gas			Utility T&D			Professional			Canada			Eliminations			Consolidated
								Services
	Contract revenue	$	76,440		$	86,986		$	100,141		$	87,009		$	(3,644	)	$	346,932
	Contract operating expenses	77,386			83,167			88,702			82,032			(3,644		)	327,643
	Amortization of intangibles	81			2,390			624			—			—			3,095
	General and administrative	9,119			5,597			15,116			5,800			—			35,632
	Gain on sale of subsidiaries	—			—			—			—			—			(58,549		)
	Other charges	829			692			1,737			692			—			3,950
	Operating income (loss)	$	(10,975	)	$	(4,860	)	$	(6,038	)	$	(1,515	)	$	—		35,161
	Non-operating expenses																(44,275		)
	Provision for income taxes																317
	Loss from continuing operations																(9,431		)
	Loss from discontinued operations net of provision for income taxes																(393		)
	Net loss																$	(9,824	)
	Other charges incurred during the first quarter of 2015 include $2.8 million related to the Company's corporate operations and have been allocated to each segment based on a percentage of total revenue.
		Three Months Ended March 31, 2014
		Oil & Gas			Utility T&D			Professional			Canada			Eliminations			Consolidated
								Services
	Contract revenue	$	177,529		$	83,521		$	100,095		$	117,079		$	(1,686	)	$	476,538
	Contract operating expenses	186,338			76,777			83,614			96,953			(1,686		)	441,996
	Amortization of intangibles	82			2,390			647			—			—			3,119
	General and administrative	12,121			3,940			14,156			6,855			—			37,072
	Operating income (loss)	$	(21,012	)	$	414		$	1,678		$	13,271		$	—		(5,649		)
	Non-operating expenses																(7,678		)
	Provision for income taxes																3,669
	Loss from continuing operations																(16,996		)
	Loss from discontinued operations net of provision for income taxes																(7,994		)
	Net loss																$	(24,990	)
Reconciliation of Assets from Segment to Consolidated	Total assets by segment as of March 31, 2015 and December 31, 2014 are presented below (in thousands):
		March 31,			December 31,
		2015			2014
	Oil & Gas	$	127,540		$	179,305
	Utility T&D	219,446			228,094
	Professional Services	107,881			137,784
	Canada	97,161			95,270
	Corporate	55,469			44,697
	Total assets, continuing operations	$	607,497		$	685,150

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The Company measures certain financial instruments at fair value on a recurring basis. The fair value of these financial instruments (in thousands) was determined using the following inputs as of March 31, 2015 and December 31, 2014:
		31-Mar-15
		Total				Quoted Prices in			Significant				Significant
						Active Markets for			Other				Other
						Identical Assets			Observable				Unobservable
						(Level 1)			Inputs (Level 2)				Inputs (Level 3)
	Liabilities:
	Interest rate swaps	$	4,565			$	—		$	4,565			$	—
		31-Dec-14
		Total				Quoted Prices in			Significant				Significant
						Active Markets			Other				Other
						for Identical			Observable				Unobservable
						Assets (Level 1)			Inputs (Level 2)				Inputs (Level 3)
	Liabilities:
	Interest rate swaps	$	4,075			$	—		$	4,075			$	—
Interest Rate Swaps and Caps Derivatives Recognized in Earnings
		Liability Derivatives
		31-Mar-15						31-Dec-14
		Balance Sheet		Fair				Balance Sheet	Fair Value
		Location		Value				Location
	Interest rate contracts- swaps	Other current		$	1,863			Other current	$	1,865
		liabilities						liabilities
	Interest rate contracts- swaps	Other long-term		2,702				Other long-term	2,210
		liabilities						liabilities
	Total derivatives			$	4,565				$	4,075
Derivative Instruments, Effect on Other Comprehensive Income (Loss)
	For the Three Months Ended March 31,
	Derivatives in ASC 815 Cash Flow	Amount of Gain Recognized in OCI on Derivative (Effective Portion)							Location of Gain or (Loss)		Amount of Loss Reclassified
	Hedging Relationships								Reclassified from		from Accumulated OCI into
									Accumulated OCI into Income (Effective Portion)		Income (Effective Portion)
		2015				2014					2015				2014
	Interest rate contracts	$	(979	)		$	(1,034	)	Interest expense, net		$	489			$	249
	Total	$	(979	)		$	(1,034	)			$	489			$	249

Discontinued_Operations_Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Major Classes of Revenue and Income (Losses) with Respect to the Discontinued Operations	Condensed Statements of Operations with respect to discontinued operations are as follows (in thousands):
		Three Months Ended March 31, 2015
		Hawkeye			CTS			Total
	Revenue	$	921		$	—		$	921
	Operating loss	(410		)	—			(410		)
	Pre-tax loss	(393		)	—			(393		)
	Net loss	(393		)	—			(393		)
		Three Months Ended March 31, 2014
		Hawkeye			CTS			Total
	Revenue	$	6,080		$	24,361		$	30,441
	Operating loss	(6,499		)	(1,377		)	(7,876		)
	Pre-tax loss	(6,617		)	(1,377		)	(7,994		)
	Net loss	(6,617		)	(1,377		)	(7,994		)
	Condensed Balance Sheets with respect to discontinued operations are as follows (in thousands):
		31-Mar-15
		Hawkeye
	Accounts receivable, net	$	5,513
	Contract cost and recognized income not yet billed	66
	Prepaid expenses	16
	Property, plant and equipment, net	111
	Other	—
	Total assets	5,706
	Accounts payable and accrued liabilities	$	4,336
	Other	404
	Total liabilities	4,740
	Net assets of discontinued operations	966
		31-Dec-14
		Hawkeye
	Accounts receivable, net	$	5,564
	Contract cost and recognized income not yet billed	66
	Property, plant and equipment, net	511
	Prepaid expenses	16
	Other	900
	Total assets	7,057
	Accounts payable and accrued liabilities	$	3,970
	Other	1,215
	Total liabilities	5,185
	Net assets of discontinued operations	1,872

Business_Disposals_Details

Business Disposals (Details) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended
In Millions, unless otherwise specified	Mar. 17, 2015	Mar. 31, 2015	Mar. 31, 2015
UtilX [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from business disposals	$40
Escrow deposit	0.5
Period of escrow deposit	6 months
Gain on disposal		21.4
Premier Utility Services, LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from business disposals			51
Escrow deposit		4	4
Period of escrow deposit			18 months
Gain on disposal		$37.10

Other_Charges_Details

Other Charges (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Accrued cost at December 31, 2014	$3,810
Restructuring Charges	3,950
Payments for Restructuring	-3,565
Restructuring Reserve, Settled without Cash	-2,251
Accrued cost at March 31, 2015	1,944
Employee Termination and Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Accrued cost at December 31, 2014	397
Restructuring Charges	784
Payments for Restructuring	-451
Restructuring Reserve, Settled without Cash	-272
Accrued cost at March 31, 2015	458
Employee Termination and Other Benefits [Member] | Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	500
Lease Abandonment [Member]
Restructuring Cost and Reserve [Line Items]
Accrued cost at December 31, 2014	0
Restructuring Charges	711
Payments for Restructuring	0
Restructuring Reserve, Settled without Cash	0
Accrued cost at March 31, 2015	711
Long-Lived Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Accrued cost at December 31, 2014	0
Restructuring Charges	1,979
Restructuring Reserve, Settled without Cash	-1,979
Accrued cost at March 31, 2015	0
Accounting and Legal Fees [Member]
Restructuring Cost and Reserve [Line Items]
Accrued cost at December 31, 2014	3,413
Restructuring Charges	476
Payments for Restructuring	-3,114
Restructuring Reserve, Settled without Cash	0
Accrued cost at March 31, 2015	$775

Contracts_in_Progress_Schedule

Contracts in Progress - Schedule of Contract Cost and Recognized Income Not Yet Billed and Related Amounts (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Contractors [Abstract]
Cost incurred on contracts in progress	$862,191	$981,518
Recognized income	75,884	90,994
Contract cost in excess of cost and recognized income	938,075	1,072,512
Progress billings and advance payments	-918,735	-1,049,102
Total Contract in progress	19,340	23,410
Contract cost and recognized income not yet billed	31,517	39,781
Contract billings in excess of cost and recognized income	-12,177	-16,371
Net cost of contracts in progress	$19,340	$23,410

Contracts_in_Progress_Addition

Contracts in Progress - Additional Information (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Contractors [Abstract]
Contract cost and recognized income not yet billed on completed agreements	$3.20	$2.80
Retainage balances	$28.10	$43.40

Intangible_Assets_Schedule_of_

Intangible Assets - Schedule of Changes in the Carrying Amounts of Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	$116,130
Amortization	-3,095	-3,119
Additions	420
Disposals	-14,742
Ending Balance	98,713
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	105,604
Amortization	-2,641
Additions	0
Disposals	-10,829
Ending Balance	92,134
Weighted Average Remaining Amortization Period	10 years 0 months 18 days
Trademark / Tradename [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	7,505
Amortization	-332
Additions	300
Disposals	-1,010
Ending Balance	6,463
Weighted Average Remaining Amortization Period	5 years 1 month 24 days
Technology [Member]
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	3,021
Amortization	-122
Additions	120
Disposals	-2,903
Ending Balance	$116
Weighted Average Remaining Amortization Period	4 years 9 months

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Amortization method	on a straight-line basis over their estimated useful lives
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of intangible asset	5 years
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of intangible asset	15 years

Intangible_Assets_Estimated_Am

Intangible Assets - Estimated Amortization Expense (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fiscal year:
Remainder of 2015	$8,049
2016	10,732
2017	10,732
2018	10,732
2019	10,614
2020	9,142
Thereafter	38,712
Total amortization	$98,713	$116,130

Accounts_Payable_and_Accrued_L2

Accounts Payable and Accrued Liabilities - Accounts Payable and Accrued Liabilities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities, Current [Abstract]
Trade accounts payable	$82,648	$82,557
Payroll and payroll liabilities	39,118	44,483
Accrued contract costs	24,002	34,791
Self-insurance accrual	15,880	15,915
Other accrued liabilities	17,210	29,567
Total accounts payable and accrued liabilities	$178,858	$207,313

Long_Term_Debt_Detail

Long Term Debt (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Total debt	$223,777	$289,030
Less: current portion	-8,689	-8,393
Long-term debt, net	215,088	280,637
2014 term loan facility [Member]
Debt Instrument [Line Items]
Total debt	204,463	270,000
Revolver borrowings [Member]
Debt Instrument [Line Items]
Total debt	0	0
Capital lease obligations [Member]
Debt Instrument [Line Items]
Total debt	1,166	1,384
Other obligations [Member]
Debt Instrument [Line Items]
Total debt	$18,148	$17,646

Longterm_Debt_Additional_Infor

Long-term Debt - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 15, 2014	Mar. 31, 2015	Aug. 07, 2013	Mar. 31, 2014
Line of Credit Facility [Line Items]
Minimum amount of debt obligation that will lead to change of control and insolvency proceedings		$15,000,000
Interest rate description	The term loans will bear interest at the Adjusted Base Rate ("ABR") plus an applicable margin, or the "Eurodollar Rate" plus an applicable margin. The ABR is the highest of (i) the rate announced by JPMorgan Chase Bank, N.A. as its prime rate, (ii) the federal funds rate plus 0.5 percent, (iii) the Eurodollar Rate applicable for a period of one month plus 1.0 percent and (iv) 2.25 percent.
2013 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt term			6 years
Maximum borrowing capacity			250,000,000
2014 Term Loan [Member]
Line of Credit Facility [Line Items]
Repayments of long term line of credit	64,800,000
Payment of debt extinguishment costs	1,600,000			33,500,000
Prepayment penalty	2.00%
Shares issued as consideration				10,100,000
Shares issued as consideration, percent of outstanding shares				19.90%
Write off of deferred debt issuance costs				800,000
ABL Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	133,600,000			133,600,000	150,000,000
Expiry period					5 years
Maturity period of term loan facility					7-Aug-18
Sublimit for letters of credit					100,000,000
Accordion feature permitting, under certain conditions, the increase of aggregate borrowings					75,000,000
Borrowing base, percent of eligible accounts receivable					85.00%
Borrowing base, percent of unbilled accounts receivable					60.00%
Commitment fee description	The borrowers will also pay an unused line fee on each of the U.S. and Canadian Facilities equal to 50 basis points when usage under the applicable facility during the preceding calendar month is less than 50 percent of the commitments or 37.5 basis points when usage under the applicable facility equals or exceeds 50 percent of the commitments for such period.
Unused capacity, threshold for commitment fee, percentage					50.00%
Percentage of proceeds from sale of asset subject to mandatory prepayment requirement					0.13%
Percentage of annual excess cash flow subject to mandatory prepayment requirement	83,600,000			83,600,000
Outstanding amount of letters of credit	50,000,000			50,000,000
ABL Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Unbilled receivables, maximum					50,000,000
Unused line fee percentage					0.50%
ABL Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Unused line fee percentage					0.38%
ABL Credit Facility [Member] | U.S. Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					125,000,000
ABL Credit Facility [Member] | Canadian Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					25,000,000
Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Minimum fixed charge coverage ratio, Covenants Requirements		1.15
Debt repayment terms	The term loans are repayable in equal quarterly installments in an aggregate amount equal to 0.25 percent of the original amount of the 2013 Term Loan Facility.
Revolving Credit Facility [Member] | Five Consecutive Day [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Excess availability threshold percentage				15.00%
Excess availability threshold amount				22,500,000
Revolving Credit Facility [Member] | Anytime [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Excess availability threshold percentage				12.50%
Excess availability threshold amount				18,800,000
JP Morgan Chase Bank NA and KKR Credit Advisors (US) LLC [Member] | 2014 Term Loan [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$270,000,000
Effective interest rate at period end	11.00%			11.00%		11.00%
LIBOR floor				1.25%		1.25%
JP Morgan Chase Bank NA and KKR Credit Advisors (US) LLC [Member] | 2014 Term Loan [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			8.75%
JP Morgan Chase Bank NA and KKR Credit Advisors (US) LLC [Member] | 2014 Term Loan [Member] | Eurodollar Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			9.75%	9.75%		9.75%

Longterm_Debt_Schedule_of_Inte

Long-term Debt - Schedule of Interest Rate Margins (Detail)	3 Months Ended
	Mar. 31, 2015
Greater than 1.25 to 1 [Member] | Greater Than One Point Two Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.25
1.25 to 1 and 1.15 to 1 [Member] | Less Than Or Equal to One Point Two Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.25
1.25 to 1 and 1.15 to 1 [Member] | Greater Than One Point One Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.15
1.15 to 1 [Member] | Less Than Or Equal to One Point One Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.15
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | Greater than 1.25 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.25%
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | 1.25 to 1 and 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.50%
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.75%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | Greater than 1.25 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.25%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | 1.25 to 1 and 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.50%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.75%

Longterm_Debt_Fair_Value_of_De

Long-term Debt - Fair Value of Debt Instruments (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Fair value of debt instruments	$223,777	$289,030
2014 term loan facility [Member]
Debt Instrument [Line Items]
Fair value of debt instruments	204,463	270,000
Revolver borrowings [Member]
Debt Instrument [Line Items]
Fair value of debt instruments	0	0
Capital lease obligations [Member]
Debt Instrument [Line Items]
Fair value of debt instruments	1,166	1,384
Other obligations [Member]
Debt Instrument [Line Items]
Fair value of debt instruments	$18,148	$17,646

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Effective tax rate from continuing operations	-3.50%	-27.50%
Tax benefit for discrete items	($400,000)
Income tax expense (benefit)	317,000	3,669,000
Lapse in Statute of Limitation [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Release in tax reserves related to statute of limitations expirations expected in next twelve months	$100,000

Stockholders_Equity_Schedule_o

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	$2,788	$8,807
Other comprehensive loss before reclassifications	-5,630	-3,097
Amounts reclassified from accumulated other comprehensive income (loss)	489	249
Total other comprehensive loss, net of tax	-5,141	-2,848
Ending balance	-2,353	5,959
Foreign currency translation adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	6,863	11,280
Other comprehensive loss before reclassifications	-4,651	-2,063
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Total other comprehensive loss, net of tax	-4,651	-2,063
Ending balance	2,212	9,217
Changes in derivative financial instrument [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	-4,075	-2,473
Other comprehensive loss before reclassifications	-979	-1,034
Amounts reclassified from accumulated other comprehensive income (loss)	489	249
Total other comprehensive loss, net of tax	-490	-785
Ending balance	($4,565)	($3,258)

Stockholders_Equity_Reclassifi

Stockholders' Equity - Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (Reclassification out of Accumulated Other Comprehensive Income [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	$489	$249
Interest rate contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest rate contracts	$489	$249

Income_Loss_Per_Share_Schedule

Income (Loss) Per Share - Schedule of Basic and Diluted Income (Loss) Per Common Share from Continuing Operations (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income (loss) from continuing operations applicable to common shares (numerator for basic and diluted calculation)	($9,431)	($16,996)
Weighted average number of common shares outstanding for basic income (loss) per share (in shares)	49,819,388	48,847,349
Weighted average number of potentially dilutive common shares outstanding	0	0
Weighted average number of common shares outstanding for diluted income (loss) per share (in shares)	49,819,388	48,847,349
Income (loss) per common share from continuing operations:
Basic (in USD per share)	($0.19)	($0.35)
Diluted (in USD per share)	($0.19)	($0.35)

Income_Loss_Per_Common_Share_S

Income (Loss) Per Common Share - Schedule of Potentially Dilutive Shares (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares excluded from the computation of diluted income (loss) per share	798,887	1,074,469
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares excluded from the computation of diluted income (loss) per share	227,750	185,290
Restricted stock and restricted stock rights [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares excluded from the computation of diluted income (loss) per share	571,137	889,179

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Segment
Segment Reporting [Abstract]
Number of operating segments	4

Segment_Information_Schedule_o

Segment Information - Schedule of Company's Operations by Reportable Segment (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Contract revenue	$346,932,000	$476,538,000
Contract	327,643,000	441,996,000
Amortization of intangibles	3,095,000	3,119,000
General and administrative	35,632,000	37,072,000
Gain on sale of subsidiaries	-58,549,000	0
Other charges	3,950,000	0
Operating income	35,161,000	-5,649,000
Other expense	-44,275,000	-7,678,000
Provision for income taxes	317,000	3,669,000
Loss from continuing operations	-9,431,000	-16,996,000
Loss from discontinued operations net of provision for income taxes	-393,000	-7,994,000
Net loss	-9,824,000	-24,990,000
Total assets, continuing operations	613,203,000		692,207,000
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	607,497,000		685,150,000
Corporate [Member]
Segment Reporting Information [Line Items]
Operating expenses	2,800,000
Corporate [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	55,469,000		44,697,000
Eliminations [Member]
Segment Reporting Information [Line Items]
Contract revenue	-3,644,000	-1,686,000
Contract	-3,644,000	-1,686,000
Amortization of intangibles	0	0
General and administrative	0	0
Other charges	0
Operating income	0	0
Oil & Gas [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Contract revenue	76,440,000	177,529,000
Contract	77,386,000	186,338,000
Amortization of intangibles	81,000	82,000
General and administrative	9,119,000	12,121,000
Other charges	829,000
Operating income	-10,975,000	-21,012,000
Oil & Gas [Member] | Operating Segments [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	127,540,000		179,305,000
Utility T&D [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Contract revenue	86,986,000	83,521,000
Contract	83,167,000	76,777,000
Amortization of intangibles	2,390,000	2,390,000
General and administrative	5,597,000	3,940,000
Other charges	692,000
Operating income	-4,860,000	414,000
Utility T&D [Member] | Operating Segments [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	219,446,000		228,094,000
Professional Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Contract revenue	100,141,000	100,095,000
Contract	88,702,000	83,614,000
Amortization of intangibles	624,000	647,000
General and administrative	15,116,000	14,156,000
Other charges	1,737,000
Operating income	-6,038,000	1,678,000
Professional Services [Member] | Operating Segments [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	107,881,000		137,784,000
CANADA | Operating Segments [Member]
Segment Reporting Information [Line Items]
Contract revenue	87,009,000	117,079,000
Contract	82,032,000	96,953,000
Amortization of intangibles	0	0
General and administrative	5,800,000	6,855,000
Other charges	692,000
Operating income	-1,515,000	13,271,000
CANADA | Operating Segments [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Total assets, continuing operations	$97,161,000		$95,270,000

Contingencies_Commitments_and_1

Contingencies, Commitments and Other Circumstances - Additional Information (Detail) (USD $)	3 Months Ended	30 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Mar. 31, 2015
Commitment And Contingencies [Line Items]
Legal settlement amount	$20,100,000	$22,800,000
Payments related to Legal Settlements	17,000,000
Payments related to retention	3,100,000
Face value of primarily performance bonds			395,400,000
Letter of Credit [Member]
Commitment And Contingencies [Line Items]
Liability recognized for letters of credit			$0

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$4,565	$4,075
Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	4,565	4,075
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	4,565	4,075
Significant Other Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$0	$0

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	1 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2013	Sep. 30, 2010	Mar. 31, 2015	Aug. 07, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR indexed debt			$395.40
Fixed interest rate		2.68%		2.70%
Recognized interest expense for next twelve months			1.9
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR Interest rate period	1 month
London Inter-Bank Offered Rate (LIBOR) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR Interest rate period		3 months
London Inter-Bank Offered Rate (LIBOR) [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR interest rate floor received		2.00%		1.25%
Interest rate swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed interest rate	2.84%
LIBOR interest rate floor received	1.25%
Interest rate swaps [Member] | August 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of derivatives	124.1
Interest rate swaps [Member] | September 2010 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount of derivatives		150
Number of interest rate swap agreements		2
Interest rate swaps [Member] | London Inter-Bank Offered Rate (LIBOR) [Member] | August 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR indexed debt	124.1
Interest rate swaps [Member] | London Inter-Bank Offered Rate (LIBOR) [Member] | September 2010 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
LIBOR indexed debt		150

Fair_Value_Measurements_Intere

Fair Value Measurements - Interest Rate Swaps and Caps Derivatives Recognized in Earnings (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$4,565	$4,075
Interest rate swaps [Member] | Other current liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	1,863	1,865
Interest rate swaps [Member] | Other long-term liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$2,702	$2,210

Fair_Value_Measurements_Deriva

Fair Value Measurements - Derivative Instruments, Effect on Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	($979)	($1,034)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	489	249
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest rate contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	-979	-1,034
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest expense, net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	$489	$249

Discontinued_Operations_Additi

Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended		30 Months Ended	3 Months Ended		12 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2014	Jun. 30, 2015	Dec. 31, 2010	Dec. 30, 2014	Mar. 29, 2012
				Contract
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations net of provision for income taxes	($393,000)	($7,994,000)
Legal settlement amount		20,100,000	22,800,000
Hawkeye [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration from business disposals				27,700,000
Number of Letters of Credit				2
Net loss from business disposal				2,700,000
Hawkeye [Member] | Letter of Credit [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales consideration from business disposals		16,200,000		16,200,000
Hawkeye [Member] | Letter of Credit [Member] | Escrow Agent [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales consideration from business disposals		5,000,000		8,000,000
CTS [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales consideration from business disposals					25,000,000
Loss from discontinued operations net of provision for income taxes					8,200,000
Net loss inclusive of non cash charge					15,000,000
Cash [Member] | Hawkeye [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales consideration from business disposals		21,200,000				1,500,000
Cash [Member] | Hawkeye [Member] | Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales consideration from business disposals							3,700,000
Former Nigeria-Based Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount claimed subsequently amended								273,700,000
Wapco [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Legal settlement amount									$32,700,000	$55,500,000

Discontinued_Operations_Schedu

Discontinued Operations - Schedule of Major Classes of Revenue and Income (Losses) with Respect to the Discontinued Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$921	$30,441
Operating loss	-410	-7,876
Pre-tax loss	-393	-7,994
Net loss	-393	-7,994
Hawkeye [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	921	6,080
Operating loss	-410	-6,499
Pre-tax loss	-393	-6,617
Net loss	-393	-6,617
Assets with respect to discontinued operations
Accounts receivable, net	5,513		5,564
Contract cost and recognized income not yet billed	66		66
Prepaid Expenses	16
Property, plant and equipment, net	111		511
Intangible assets, net			16
Other	0		900
Total assets	5,706		7,057
Accounts payable and accrued liabilities	4,336		3,970
Other	404		1,215
Total liabilities	4,740		5,185
Net assets (liabilities) of discontinued operations	966		1,872
CTS [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0	24,361
Operating loss	0	-1,377
Pre-tax loss	0	-1,377
Net loss	$0	($1,377)