10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2016

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                  to                 

Commission file number: 001-33225

Great Lakes Dredge & Dock Corporation

(Exact name of registrant as specified in its charter)

Delaware	20-5336063
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
2122 York Road, Oak Brook, IL	60523
(Address of principal executive offices)	(Zip Code)

(630) 574-3000

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	☐	Accelerated Filer	☒
Non-Accelerated Filer	☐  (Do not check if a smaller reporting company)	Smaller reporting company	☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of October 28, 2016, 60,940,829 shares of the Registrant’s Common Stock, par value $.0001 per share, were outstanding.

Great Lakes Dredge & Dock Corporation and Subsidiaries

Quarterly Report Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

For the Quarterly Period ended September 30, 2016

INDEX

		Page
	Part I Financial Information (Unaudited)	3
Item 1	Financial Statements	3
	Condensed Consolidated Balance Sheets at September 30, 2016 and December 31, 2015	3
	Condensed Consolidated Statements of Operations for the Three and Nine Months ended September 30, 2016 and 2015	4
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months ended September 30, 2016 and 2015	5
	Condensed Consolidated Statements of Equity for the Nine Months Ended September 30, 2016 and 2015	6
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2016 and 2015	7
	Notes to Condensed Consolidated Financial Statements	9
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Item 3	Quantitative and Qualitative Disclosures About Market Risk	39
Item 4	Controls and Procedures	39
	Part II Other Information	40
Item 1	Legal Proceedings	40
Item 1A	Risk Factors	40
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	40
Item 3	Defaults Upon Senior Securities	40
Item 4	Mine Safety Disclosures	40
Item 5	Other Information	40
Item 6	Exhibits	41
	Signature	42
	Exhibit Index	43

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PART I — Financial Information

Item 1. Financial Statements.

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

Condensed Consolidated Balance Sheets

(Unaudited)

(in thousands, except per share amounts)  

	September 30,			December 31,
	2016			2015
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	13,595		$	14,184
Accounts receivable—net		115,753			130,777
Contract revenues in excess of billings		75,843			81,195
Inventories		35,734			35,963
Prepaid expenses and other current assets		78,341			67,614
Total current assets		319,266			329,733
PROPERTY AND EQUIPMENT—Net		436,691			430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		85,314			86,004
INVENTORIES—Noncurrent		48,706			41,646
INVESTMENTS IN JOINT VENTURES		5,791			3,761
OTHER		8,366			6,770
TOTAL	$	904,134		$	898,124
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	109,255		$	118,846
Accrued expenses		57,365			72,277
Billings in excess of contract revenues		9,677			7,061
Revolving credit facility		60,000			—
Current portion of long term debt		11,745			7,506
Total current liabilities		248,042			205,690
7 3/8% SENIOR NOTES		272,748			271,998
REVOLVING CREDIT FACILITY		—			20,000
NOTES PAYABLE		45,012			53,792
DEFERRED INCOME TAXES		73,753			74,006
OTHER		10,002			20,465
Total liabilities		649,557			645,951
COMMITMENTS AND CONTINGENCIES (Note 9)
EQUITY:
Common stock—$.0001 par value; 90,000 authorized, 61,215 and 60,709 shares issued; 60,937 and 60,431 shares outstanding at September 30, 2016 and December 31, 2015, respectively.		6			6
Treasury stock, at cost		(1,433	)		(1,433	)
Additional paid-in capital		286,266			283,247
Accumulated deficit		(28,858	)		(27,664	)
Accumulated other comprehensive loss		(1,404	)		(1,983	)
Total equity		254,577			252,173
TOTAL	$	904,134		$	898,124

See notes to unaudited condensed consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Condensed Consolidated Statements of Operations

(Unaudited)

(in thousands, except per share amounts)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Contract revenues	$	198,869		$	220,802		$	554,180		$	634,236
Costs of contract revenues		178,824			196,717			489,889			567,182
Gross profit		20,045			24,085			64,291			67,054
General and administrative expenses		7,187			15,277			47,027			48,768
Impairment of goodwill		—			—			—			2,750
(Gain) loss on sale of assets—net		(2	)		(884	)		675			(887	)
Operating income		12,860			9,692			16,589			16,423
Interest expense—net		(4,819	)		(7,293	)		(16,443	)		(18,490	)
Equity in earnings (loss) of joint ventures		6			(2,051	)		19			(5,765	)
Other income (expense)		(637	)		706			(1,918	)		(353	)
Income (loss) before income taxes		7,410			1,054			(1,753	)		(8,185	)
Income tax (provision) benefit		(2,850	)		(742	)		559			2,831
Net income (loss)	$	4,560		$	312		$	(1,194	)	$	(5,354	)
Basic earnings (loss) per share	$	0.08		$	—		$	(0.02	)	$	(0.09	)
Basic weighted average shares		60,811			60,496			60,676			60,411
Diluted earnings (loss) per share	$	0.08		$	—		$	(0.02	)	$	(0.09	)
Diluted weighted average shares		61,526			60,841			60,676			60,411

See notes to unaudited condensed consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Condensed Consolidated Statements of Comprehensive Income (Loss)

(Unaudited)

(in thousands)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Net income (loss)	$	4,560		$	312		$	(1,194	)	$	(5,354	)
Currency translation adjustment—net of tax (1)		39			(639	)		596			(1,394	)
Net unrealized gain on derivatives—net of tax (2)		(17	)		—			(17	)		—
Other comprehensive income (loss)—net of tax		22			(639	)		579			(1,394	)
Comprehensive income (loss)	$	4,582		$	(327	)	$	(615	)	$	(6,748	)

(1) Net of income tax (provision) benefit of $(25) and $422 for the three months ended September 30, 2016 and 2015, respectively and $(395) and $922 for the nine months ended September 30, 2016 and 2015, respectively.

(2) Net of income tax benefit of $11 for the three and nine months ended September 30, 2016, respectively.

See notes to unaudited condensed consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Condensed Consolidated Statements of Equity

(Unaudited)

(in thousands)

																	Accumulated
	Sharesof				Shares of						Additional						Other
	Common		Common		Treasury			Treasury			Paid-In			Accumulated			Comprehensive
	Stock		Stock		Stock			Stock			Capital			Deficit			Loss			Total
BALANCE—January 1, 2016		60,709	$	6		(278	)	$	(1,433	)	$	283,247		$	(27,664	)	$	(1,983	)	$	252,173
Share-based compensation		126		—		—			—			2,276			—			—			2,276
Vesting of restricted stock units, including impact of shares withheld for taxes		71		—		—			—			(162	)		—			—			(162	)
Exercise of options and purchases from employee stock plans		309		—		—			—			905			—			—			905
Net loss		—		—		—			—			—			(1,194	)		—			(1,194	)
Other comprehensive income—net of tax		—		—		—			—			—			—			579			579
BALANCE—September 30, 2016		61,215	$	6		(278	)	$	(1,433	)	$	286,266		$	(28,858	)	$	(1,404	)	$	254,577

																	Accumulated
	Shares of				Shares of						Additional						Other
	Common		Common		Treasury			Treasury			Paid-In			Accumulated			Comprehensive
	Stock		Stock		Stock			Stock			Capital			Deficit			Loss			Total
BALANCE—January 1, 2015		60,170	$	6		—		$	—		$	278,166		$	(21,475	)	$	(734	)	$	255,963
Share-based compensation		124		—		—			—			2,897			—			—			2,897
Vesting of restricted stock units, including impact of shares withheld for taxes		98		—		—			—			(265	)		—			—			(265	)
Exercise of options and purchases from employee stock plans		268		—		—			—			1,356			—			—			1,356
Excess income tax benefit from share-based compensation		—		—		—			—			(13	)		—			—			(13	)
Purchase of treasury stock		—		—		(213	)		(1,107	)											(1,107	)
Net loss		—		—		—			—			—			(5,354	)		—			(5,354	)
Other comprehensive loss—net of tax		—		—		—			—			—			—			(1,394	)		(1,394	)
BALANCE—September 30, 2015		60,660	$	6		(213	)	$	(1,107	)	$	282,141		$	(26,829	)	$	(2,128	)	$	252,083

See notes to unaudited condensed consolidated financial statements.

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Great Lakes Dredge & Dock Corporation and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(in thousands)

	Nine Months Ended
	September 30,
	2016			2015
OPERATING ACTIVITIES:
Net loss	$	(1,194	)	$	(5,354	)
Adjustments to reconcile net loss to net cash flows provided by (used in) operating activities:
Depreciation and amortization		45,692			47,747
Equity in earnings of joint ventures		(6,313	)		(3,402	)
Cash distributions from joint ventures		3,234			2,500
Deferred income taxes		152			(3,031	)
(Gain) loss on sale of assets		675			(887	)
Impairment of goodwill		—			2,750
Gain on adjustment of contingent consideration		(8,940	)		(8,444	)
Amortization of deferred financing fees		1,879			2,126
Unrealized net gain from mark-to-market valuations of derivatives		(5,285	)		(1,479	)
Unrealized foreign currency gain		(213	)		(1,076	)
Share-based compensation expense		2,276			2,897
Excess income tax benefit from share-based compensation		—			13
Changes in assets and liabilities:
Accounts receivable		14,163			(31,819	)
Contract revenues in excess of billings		5,712			14,328
Inventories		(6,831	)		(3,761	)
Prepaid expenses and other current assets		(6,839	)		(6,727	)
Accounts payable and accrued expenses		(26,317	)		(9,896	)
Billings in excess of contract revenues		2,593			1,657
Other noncurrent assets and liabilities		(1,466	)		(2,039	)
Cash provided by (used in) operating activities		12,978			(3,897	)
INVESTING ACTIVITIES:
Purchases of property and equipment		(58,842	)		(53,394	)
Proceeds from dispositions of property and equipment		10,455			1,167
Cash used in investing activities		(48,387	)		(52,227	)

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	Nine Months Ended
	September 30,
	2016			2015
FINANCING ACTIVITIES:
Deferred financing fees		(332	)		(29	)
Repayments of long term note payable		(803	)		(488	)
Taxes paid on settlement of vested share awards		(162	)		(265	)
Repayments of term loan facility		(3,750	)		(3,750	)
Repayments of equipment debt		(1,064	)		(853	)
Proceeds from equipment debt		—			410
Exercise of options and purchases from employee stock plans		905			1,356
Excess income tax benefit from share-based compensation		—			(13	)
Treasury stock		—			(1,107	)
Borrowings under revolving loans		133,000			146,000
Repayments of revolving loans		(93,000	)		(118,000	)
Net cash provided by financing activities		34,794			23,261
Effect of foreign currency exchange rates on cash and cash equivalents		26			(105	)
Net decrease in cash and cash equivalents		(589	)		(32,968	)
Cash and cash equivalents at beginning of period		14,184			42,389
Cash and cash equivalents at end of period	$	13,595		$	9,421
Supplemental Cash Flow Information
Cash paid for interest	$	23,846		$	23,645
Cash paid (refunded) for income taxes	$	(226	)	$	987
Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	$	14,511		$	4,981
Property and equipment purchased on capital leases and equipment notes	$	—		$	2,190
Property and equipment purchased on notes payable	$	—		$	15,569

See notes to unaudited condensed consolidated financial statements.

8

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(dollar amounts in thousands, except per share amounts or as otherwise noted)

1. Basis of presentation

The unaudited condensed consolidated financial statements and notes herein should be read in conjunction with the audited consolidated financial statements of Great Lakes Dredge & Dock Corporation and Subsidiaries (the “Company” or “Great Lakes”) and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015. The condensed consolidated financial statements included herein have been prepared by the Company without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the SEC’s rules and regulations, although management believes that the disclosures are adequate and make the information presented not misleading. In the opinion of management, all adjustments, which are of a normal and recurring nature (except as otherwise noted), that are necessary to present fairly the Company’s financial position as of September 30, 2016, and its results of operations for the three and nine months ended September 30, 2016 and 2015 and cash flows for the nine months ended September 30, 2016 and 2015 have been included.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor is generally hired on a project-by-project basis. Costs of contract revenues vary significantly depending on the type and location of work performed and assets utilized.

The Company’s cost structure includes significant annual equipment-related costs, including depreciation, maintenance, insurance and long-term rentals. These costs have averaged approximately 21% of total costs of contract revenues over the prior three years. During the year, both equipment utilization and the timing of fixed cost expenditures fluctuate significantly. Accordingly, the Company allocates these fixed equipment costs to interim periods in proportion to revenues recognized over the year, to better match revenues and expenses. Specifically, at each interim reporting date the Company compares actual revenues earned to date on its dredging contracts to expected annual revenues and recognizes equipment costs on the same proportionate basis. In the fourth quarter, any over or under allocated equipment costs are recognized such that the expense for the year equals actual equipment costs incurred during the year.

The Company has two operating segments: dredging and environmental & infrastructure, previously referred to as environmental & remediation, which are also the Company’s two reportable segments. The Company has determined that dredging, Terra Contracting Services, LLC (“Terra”) and Great Lakes Environmental & Infrastructure, LLC (“GLEI”) are the Company’s three reporting units.

The Company performed its most recent annual test of impairment as of July 1, 2016 with no indication of impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2017. Due to a decline in the overall financial performance and declining cash flows in the Terra reporting unit, the Company concluded there was a triggering event that required an interim impairment test for the reporting unit in the second quarter of 2015 and recorded a goodwill impairment charge of $2,750 during the quarter ended June 30, 2015. This impairment of goodwill is discussed in Note 6.

The condensed consolidated results of operations and comprehensive income for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

Recent Accounting Pronouncements

In August 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update No. 2016-15 (“ASU 2016-15”), Classification of Certain Cash Receipts and Cash Payments which amends FASB’s standards for reporting cash flows in general-purpose financial statements. The amendments address the diversity in practice related to the classification of certain cash receipts and payments.  The guidance is effective for fiscal years beginning after December 15, 2017.  The Company is currently evaluating the impact of ASU 2016-15 on its consolidated financial statements.

In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“ASU 2016-09”), Compensation – Stock Compensation (Topic 718). ASU 2016-09 identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement

9

of cash flows. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-09 on its consolidated financial statements.

In February 2016, the FASB issued Accounting Standard Update No. 2016-02 (“ASU 2016-02”), Leases (Topic 842). The Board issued this update to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-02 on its financial statements.

In November 2015, the FASB issued Accounting Standard Update No. 2015-17 (“ASU 2015-17”), Income Taxes: Balance Sheet Classifications of Deferred Taxes (Topic 740) which simplifies the presentation of deferred income taxes by requiring that deferred tax liabilities and assets be classified as noncurrent in the balance sheet. The update is effective for public companies for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The guidance may be adopted prospectively or retrospectively and early adoption is permitted. As of December 31, 2015, the Company elected to early adopt this ASU 2015-17 on a prospective basis and therefore, prior years were not retrospectively adjusted.

In April 2015, the FASB issued Accounting Standard Update No. 2015-03 (“ASU 2015-03”), Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This update is effective for fiscal years beginning after December 15, 2015, and is required to be applied retrospectively. The Company adopted this standard in the first quarter of 2016 on a retrospective basis. As a result, the Company presented $3,502 of unamortized debt issuance costs that had been included in other assets in the consolidated balance sheet as of December 31, 2015 as direct deductions from the carrying amounts of the related debt liabilities.

In May 2014, the FASB issued Accounting Standard Update No. 2014-09 (“ASU 2014-09”), Revenue from Contracts with Customers (Topic 606), which supersedes the existing revenue recognition requirements. ASU 2014-09 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 has been deferred to be effective for fiscal years beginning after December 15, 2017, including interim periods within that reporting period, which will be its first quarter of fiscal 2018. Although early adoption is permitted in fiscal 2017, the Company expects to adopt ASU 2014-09 in first quarter of 2018. The Company is currently evaluating the impact of ASU 2014-09 on its consolidated financial statements.

2. Earnings per share

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings per share is computed similarly to basic earnings per share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock. For the nine months ended September 30, 2016 and 2015, the dilutive effect of 576 thousand and 462 thousand stock options and restricted stock units, respectively, were excluded from the diluted weighted-average common shares outstanding as the Company incurred a loss during these periods. For the three and nine months ended September 30, 2016, 1,594 thousand and 1,603 thousand stock options and restricted stock units were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method, as such stock options and restricted stock units were determined to be anti-dilutive. Similarly, for the three months ended September 30, 2015, 1,170 thousand stock options and restricted stock units were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method.

10

The computations for basic and diluted earnings (loss) per share are as follows:

	Three Months Ended				Nine Months Ended
(shares in thousands)	September 30,				September 30,
	2016		2015		2016			2015
Net income (loss)	$	4,560	$	312	$	(1,194	)	$	(5,354	)
Weighted-average common shares outstanding — basic		60,811		60,496		60,676			60,411
Effect of stock options and restricted stock units		715		345		—			—
Weighted-average common shares outstanding — diluted		61,526		60,841		60,676			60,411
Earnings (loss) per share —basic	$	0.08	$	—	$	(0.02	)	$	(0.09	)
Earnings (loss) per share — diluted	$	0.08	$	—	$	(0.02	)	$	(0.09	)

3. Accounts receivable and contracts in progress

Accounts receivable at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Completed contracts	$	12,379		$	37,111
Contracts in progress		87,965			70,787
Retainage		20,340			27,203
		120,684			135,101
Allowance for doubtful accounts		(469	)		(754	)
Total accounts receivable—net	$	120,215		$	134,347
Current portion of accounts receivable—net	$	115,753		$	130,777
Long-term accounts receivable and retainage		4,462			3,570
Total accounts receivable—net	$	120,215		$	134,347

The components of contracts in progress at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	404,541		$	230,159
Amounts billed		(351,754	)		(176,283	)
Costs and earnings in excess of billings for contracts in progress		52,787			53,876
Costs and earnings in excess of billings for completed contracts		23,056			27,319
Total contract revenues in excess of billings	$	75,843		$	81,195
Billings in excess of costs and earnings:
Amounts billed	$	(270,274	)	$	(207,550	)
Costs and earnings for contracts in progress		260,597			200,489
Total billings in excess of contract revenues	$	(9,677	)	$	(7,061	)

The Company has $17,910 included in costs in excess of billings that are dependent upon the sale of environmental credits earned for a wetland mitigation project. The sale of these credits is subject to market factors that could cause the amount of expected revenue to be higher or lower than currently estimated. If the amount of proceeds received from the sale of the environmental credits is lower than our expectations, we could sustain a loss of part or all of the costs incurred related to this project. Additionally, the timing of realization may be impacted by the timing of a delay in the sale of these environmental credits, resulting in a longer period to recover our investment.

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4. Accrued expenses

Accrued expenses at September 30, 2016 and December 31, 2015 are as follows:

	September 30,		December 31,
	2016		2015
Insurance	$	15,962	$	16,291
Accumulated deficit in joint ventures		14,359		15,408
Payroll and employee benefits		7,282		13,317
Income and other taxes		4,341		3,726
Interest		4,014		8,743
Percentage of completion adjustment		2,876		2,837
Fuel hedge contracts		—		4,388
Other		8,531		7,567
Total accrued expenses	$	57,365	$	72,277

5. Long-term debt

Credit Agreement

On June 4, 2012, the Company entered into a senior revolving credit agreement, as subsequently amended, (the “Credit Agreement”) with certain financial institutions from time to time party thereto as lenders, Wells Fargo Bank, National Association, as Administrative Agent, Swingline Lender and an Issuing Lender, Bank of America, N.A., as Syndication Agent and PNC Bank, National Association, BMO Harris Bank N.A. and Fifth Third Bank, as Co-Documentation Agents. The Credit Agreement provides for a senior revolving credit facility in an aggregate principal amount of up to $199,000, multicurrency borrowings up to a $50,000 sublimit and swingline loans up to a $10,000 sublimit. The Credit Agreement also includes an incremental loans feature that will allow the Company to increase the senior revolving credit facility by an aggregate principal amount of up to $15,000. This feature is subject to lenders providing incremental commitments for such increase, provided that no default or event of default exists, and the Company being in pro forma compliance with the existing financial covenants, both before and after giving effect to the increase, and subject to other standard conditions. The Credit Agreement is collateralized by a substantial portion of the Company’s operating equipment with a net book value at September 30, 2016 of $132,178.

The Company’s Credit Agreement matures on June 2, 2017 and the Company is in discussions with lenders to finalize a successor credit facility with substantially similar terms as the current Credit Agreement.

On June 24, 2016, the Company entered into the seventh amendment to the Credit Agreement which modified the Credit Agreement to allow for the sale of the vessel known as the Reem Island and provided for the collateral release to effect the sale. The reduction in the collateral pool resulted in a reduction in the size of the Credit Facility, from $210,000 to $199,000. In addition, the net cash proceeds of the sale of the Reem Island, $10,000, were applied to the revolving loans outstanding.

On June 30, 2016 the Company entered into the eighth amendment (the “Eighth Amendment”) to the Credit Agreement which increased the margin applicable to interest rates, letters of credit and commitment fees thereunder. Depending on the Company’s consolidated total leverage ratio (as defined in the Credit Agreement and further described below), borrowings under the revolving credit facility will bear interest at the option of the Company at either the LIBOR rate plus a margin between 1.50% and 3.50% or a base rate plus a margin between 0.50% and 2.50%.

In addition, the Eighth Amendment modifies the consolidated total leverage covenant contained in the Credit Agreement and adds a maximum capital expenditures covenant. The Company may not permit the consolidated total leverage ratio to be greater than (i) 5.00 to 1.00 for the fiscal quarter ending June 30, 2016, (ii) 4.75 to 1.00 for the fiscal quarter ending September 30, 2016 and (iii) 4.50 to 1.00 for any fiscal quarter ending thereafter. Further, the Company and its subsidiaries may not allow its aggregate capital expenditures to exceed (i) $105,000 for the fiscal year ending December 31, 2016 and (ii) $45,000 during any fiscal year thereafter.

Last, the Eighth Amendment requires the Company and its subsidiaries party to the Credit Agreement to pledge their respective inventory as security for the revolving credit facility.

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The Credit Agreement contains affirmative, negative and financial covenants customary for financings of this type. The Credit Agreement also contains customary events of default (including non-payment of principal or interest on any material debt and breaches of covenants) as well as events of default relating to certain actions by the Company’s surety bonding provider. The Credit Agreement requires the Company to maintain a minimum fixed charge coverage ratio of 1.25 to 1.00.

The obligations of Great Lakes under the Credit Agreement are unconditionally guaranteed, on a joint and several basis, by each existing and subsequently acquired or formed material direct and indirect domestic subsidiary of the Company. During a year, the Company frequently borrows and repays amounts under its revolving credit facility. As of September 30, 2016, the Company had $60,000 of borrowings on the revolver and $68,893 of letters of credit outstanding, resulting in $70,107 of availability under the Credit Agreement. At September 30, 2016, the Company was in compliance with its various financial covenants under the Credit Agreement.

Term loan facility

On November 4, 2014, the Company entered into a senior secured term loan facility consisting of a term loan in an aggregate principal amount of $50,000 (the “Term Loan Facility”) pursuant to a Loan and Security Agreement, as subsequently amended, (the “Loan Agreement”) by and among the lenders party thereto from time to time and Bank of America, N.A., as administrative agent. The Company borrowed an aggregate principal amount of $47,360 in 2014 and an additional $2,640 in 2015. The proceeds from the Term Loan Facility will be used for the working capital and general corporate purposes of the Company, including to repay borrowings under the Credit Agreement made to finance the construction of the Company’s dual mode articulated tug/barge trailing suction hopper dredge (the “ATB”).

The Term Loan Facility has a term of 5 years. The borrowings under the Term Loan Facility bear interest at a fixed rate of 4.655% per annum. If an event of default occurs under the Loan Agreement, the interest rate will increase by 2.00% per annum during the continuance of such event of default.

The Term Loan Facility provides for monthly amortization payments, payable in arrears, which commenced on December 4, 2014, at an annual amount of (i) approximately 10% of the principal amount of the Term Loan Facility during the first two years of the term, (ii) approximately 20% of the principal amount of the Term Loan Facility during the third and fourth years of the term, and (iii) approximately 25% of the principal amount of the Term Loan Facility during the final year of the term, with the remainder due on the maturity date of the facility. In addition, the Company has usual and customary mandatory prepayment provisions and may optionally prepay the Term Loan Facility in whole or in part at any time, subject to a minimum prepayment amount.

The Loan Agreement includes representations, affirmative and negative covenants and events of default customary for financings of this type and includes the same financial covenants that are currently set forth in the Credit Agreement. The Term Loan Facility is collateralized by a portion of the Company’s operating equipment with a net book value at September 30, 2016 of $47,975.

Senior notes

The Company has outstanding $275,000 of 7.375% senior notes due February 2019. There is an optional redemption on all notes. The redemption prices are 103.7% in 2015, 101.8% in 2016 and 100% in any year following, until the notes mature in 2019.  Interest is paid semi-annually and principal is due at maturity.

Other

The Company enters into note arrangements to finance certain vessels and ancillary equipment.  During the first quarter of 2015, the Company financed the $15,569 acquisition of a vessel previously under an operating lease with a note bearing interest at 5.75% to maturity in 2023.  The current portion of all equipment notes is $2,442. The long term portion is $15,275 and is included in notes payable or other long term liabilities.

6. Impairment of goodwill

The Company performed its most recent annual test of impairment as of July 1, 2016 with no indication of impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2017.

Due to a decline in the overall financial performance and declining cash flows in the Terra reporting unit, the Company concluded there was a triggering event that required an interim impairment test for the reporting unit in the second quarter of 2015.

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The Company performed step one of the goodwill impairment test as of June 30, 2015, which compared the fair value of the Terra reporting unit against its carrying amount, including goodwill. In deriving the fair value of the Terra reporting unit, the Company used both a market-based approach and an income-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated revenue and Adjusted EBITDA from continuing operations. Based on the first step analysis, management concluded that the fair value of the Terra reporting unit was less than its carrying value; therefore, the Company performed step two of the goodwill impairment analysis.  

Step two of the goodwill impairment analysis measures the impairment charge by allocating the reporting unit’s fair value to all of the assets and liabilities of the reporting unit in a hypothetical analysis that calculates implied fair value of goodwill in the same manner as if the reporting unit was being acquired in a business combination. Any excess of the carrying value of the reporting unit’s goodwill over the implied fair value of the reporting unit’s goodwill is recorded as a loss on impairment of goodwill.

Management determined that the Terra reporting unit’s implied fair value of goodwill was below the carrying value as of June 30, 2015. As a result, the Company recorded an impairment charge of $2,750 in the second quarter of 2015.

The change in the carrying value of goodwill for the period ended September 30, 2015 is as follows:

	DredgingSegment		Environmental & InfrastructureSegment			Total
Balance — December 31, 2014	$	76,576	$	9,750		$	86,326
Impairment of goodwill		—		(2,750	)		(2,750	)
BALANCE—September 30, 2015	$	76,576	$	7,000		$	83,576

7. Fair value measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has been established by GAAP that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance describes 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; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At times, the Company holds certain derivative contracts that it uses to manage foreign currency risk or commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. The fair values of these financial instruments are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	At September 30, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	869	$	—	$	869	$	—

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			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	4,388	$	—	$	4,388	$	—

Fuel hedge contracts

The Company is exposed to certain market risks, primarily commodity price risk as it relates to the diesel fuel purchase requirements, which occur in the normal course of business. The Company enters into heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices will have an adverse impact on cash flows associated with its domestic dredging contracts. The Company’s goal is to hedge approximately 80% of the fuel requirements for work in domestic backlog.

As of September 30, 2016, the Company was party to various swap arrangements to hedge the price of a portion of its diesel fuel purchase requirements for work in its backlog to be performed through June 2017. As of September 30, 2016, there were 8.6 million gallons remaining on these contracts which represent approximately 80% of the Company’s forecasted domestic fuel purchases through June 2017. Under these swap agreements, the Company will pay fixed prices ranging from $1.02 to $1.70 per gallon.

At September 30, 2016 the fair value asset of the fuel hedge contracts was estimated to be $869 and is recorded in prepaid expenses and other current assets. At December 31, 2015, the fair value liability of the fuel hedge contracts was estimated to be $4,388 and is recorded in accrued expenses. For fuel hedge contracts considered to be highly effective, the losses reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the nine months ended September 30, 2016 were $46. The remaining gains and losses included in accumulated other comprehensive loss at September 30, 2016 will be reclassified into earnings over the next nine months, corresponding to the period during which the hedged fuel is expected to be utilized. Changes in the fair value of fuel hedge contracts not considered highly effective are recorded as cost of contract revenues in the Statement of Operations. The fair values of fuel hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines fair value of these fuel hedges using Level 2 inputs.

The Company is exposed to counterparty credit risk associated with non-performance of its various derivative instruments. The Company’s risk would be limited to any unrealized gains on current positions. To help mitigate this risk, the Company transacts only with counterparties that are rated as investment grade or higher. In addition, all counterparties are monitored on a continuous basis.

The fair value of the fuel hedge contracts outstanding as of September 30, 2016 and December 31, 2015 is as follows:

		Fair Value at
		September 30,			December 31,
	Balance Sheet Location	2016			2015
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	(28	)	$	—
Derivatives not designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets		897			—
Total asset derivatives		$	869		$	—
Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	—		$	4,388

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Assets and liabilities measured at fair value on a nonrecurring basis  

All other nonfinancial assets and liabilities measured at fair value in the financial statements on a nonrecurring basis are subject to fair value measurements and disclosures. Nonfinancial assets and liabilities included in our condensed consolidated balance sheets and measured on a nonrecurring basis consist of goodwill and long-lived assets, including other acquired intangibles. Goodwill and long-lived assets are measured at fair value to test for and measure impairment, if any, at least annually for goodwill or when necessary for both goodwill and long-lived assets.

The Company estimated the fair value of our Terra reporting unit for our goodwill impairment test by using both a market-based approach and an income-based approach. The income approach is dependent on a number of factors, including estimates of future market growth trends, forecasted revenues and expenses based upon historical operating data, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated revenue and Adjusted EBITDA from continuing operations. The Company analyzed companies that performed similar services or are considered peers.

An impairment of goodwill was recorded in the amount of $2,750 in the second quarter of 2015. The fair value of goodwill was determined using quantitative models that contained significant unobservable inputs. See Note 6.

	FairValue Measurements Using Significant Unobservable Inputs (Level 3)
	2015
Goodwill
Balance at January 1,	$	86,326
Impairment of goodwill		(2,750	)
Balance at December 31,	$	83,576

Accumulated other comprehensive income (loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Cumulative translation adjustments—net of tax	$	39		$	(639	)	$	596		$	(1,394	)
Derivatives:
Reclassification of derivative losses to earnings—net of tax		46			—			46			—
Change in fair value of derivatives—net of tax		(63	)		—			(63	)		—
Net unrealized gain on derivatives—net of tax		(17	)		—			(17	)		—
Total other comprehensive income (loss)	$	22		$	(639	)	$	579		$	(1,394	)

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

		Three Months Ended		Nine Months Ended
		September 30,		September 30,
	Statement of Operations Location	2016		2016
Derivatives:
Fuelhedge contracts	Costs of contract revenues	$	76	$	76
	Income tax benefit		30		30
		$	46	$	46

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Other financial instruments

The carrying value of financial instruments included in current assets and current liabilities approximates fair value due to the short-term maturities of these instruments. Based on timing of the cash flows and comparison to current market interest rates, the carrying value of our senior revolving credit agreement approximates fair value. The Term Loan Facility approximates fair value based upon stable market interest rates and Company credit ratings from inception to year end. In January 2011 and again in November 2014, the Company issued a total of $275,000 of 7.375% senior notes due February 1, 2019, which were outstanding at September 30, 2016 (See Note 5). The senior notes are senior unsecured obligations of the Company and its subsidiaries that guarantee the senior notes. The fair value of the senior notes was $269,500 at September 30, 2016, which is a Level 1 fair value measurement as the senior notes value was obtained using quoted prices in active markets. It is impracticable to determine the fair value of outstanding letters of credit or performance, bid and payment bonds due to uncertainties as to the amount and timing of future obligations, if any.

8. Share-based compensation

The Company’s 2007 Long-Term Incentive Plan permits the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to its employees and directors for up to 5.8 million shares of common stock.

In March 2016, the Company granted 716 thousand restricted stock units to certain employees pursuant to the plan. In addition, all non-employee directors on the Company’s board of directors are paid a portion of their board-related compensation in stock grants. Compensation cost charged to expense related to share-based compensation arrangements was $270 and $839 for the three months ended September 30, 2016 and 2015, respectively, and $2,276 and $2,897 for the nine months ended September 30, 2016 and 2015, respectively.

9. Commitments and contingencies

Commercial commitments

Performance and bid bonds are customarily required for dredging and marine construction projects, as well as some environmental & infrastructure projects. The Company has a bonding agreement with Zurich American Insurance Company (“Zurich”) under which the Company can obtain performance, bid and payment bonds (the “Zurich Bonding Agreement”). In April 2015, we entered into additional bonding agreements with ACE Holdings, Inc., Argonaut Insurance Company, Berkley Insurance Company, and Liberty Mutual Insurance Company (collectively, the “Additional Sureties”). The bonding agreements with the Additional Sureties contain similar terms and conditions as the Zurich Bonding Agreement. The Company also has outstanding bonds with Travelers Casualty and Surety Company of America. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1,000 to $10,000. At September 30, 2016, the Company had outstanding performance bonds with a notional amount of approximately $1,043,976, of which $41,082 relates to projects from the Company’s historical demolition business. The revenue value remaining in backlog related to these projects totaled approximately $422,956.

In connection with the sale of our historical demolition business, the Company was obligated to keep in place the surety bonds on pending demolition projects for the period required under the respective contract for a project.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby the Company retains responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

Legal proceedings and other contingencies

As is customary with negotiated contracts and modifications or claims to competitively bid contracts with the federal government, the government has the right to audit the books and records of the Company to ensure compliance with such contracts, modifications, or claims, and the applicable federal laws. The government has the ability to seek a price adjustment based on the results of such audit. Any such audits have not had, and are not expected to have, a material impact on the financial position, operations, or cash flows of the Company.

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against the Company and certain of its subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved, or settled adversely to the Company. Although the Company is subject to various claims and legal actions that arise in the ordinary course of business, except as described below, the Company is not currently a party to any material legal proceedings or environmental claims. The Company records an accrual when it is probable a liability has been incurred

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and the amount of loss can be reasonably estimated. The Company does not believe any of these proceedings, individually or in the aggregate, would be expected to have a material effect on results of operations, cash flows or financial condition.

On April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC (“Yankee”), which together comprised the Company’s historical demolition business, to a privately owned demolition company. Under the terms of the divestiture, the Company retained certain pre-closing liabilities relating to the disposed business. Certain of these liabilities and a legal action brought by the Company to enforce the buyer’s obligations under the sale agreement are described below.

In 2009, NASDI received a letter stating that the Attorney General for the Commonwealth of Massachusetts is investigating alleged violations of the Massachusetts Solid Waste Act. The Company believes that the Massachusetts Attorney General is investigating waste disposal activities at an allegedly unpermitted disposal site owned by a third party with whom NASDI contracted for the disposal of waste materials in 2007 and 2008. Per the Massachusetts Attorney General’s request, NASDI executed a tolling agreement regarding the matter in 2009 and engaged in further discussions with the Massachusetts Attorney General’s office. On or about February 5, 2016, the parties agreed to a tentative settlement in the amount of $275, without any admission of liability and subject to final documentation. On June 3, 2016, a Consent Judgment was entered as a final judgment in Massachusetts Superior Court to implement that settlement.

On January 14, 2015, the Company and our subsidiary, NASDI Holdings, LLC, brought an action in the Delaware Court of Chancery to enforce the terms of the Company's agreement to sell NASDI and Yankee. Under the terms of the agreement, the Company received cash of $5,309 and retained the right to receive additional proceeds based upon future collections of outstanding accounts receivable and work in process existing at the date of close. The Company seeks specific performance of buyer’s obligation to collect and to remit the additional proceeds, and other related relief. Defendants have filed counterclaims alleging that the Company misrepresented the quality of its contracts and receivables prior to the sale. The Company denies defendants’ allegations and intends to vigorously defend against the counterclaims.

Except as noted above, the Company has not accrued any amounts with respect to the above matters, as the Company does not believe, based on information currently known to it, that a loss relating to these matters is probable, and an estimate of a range of potential losses relating to these matters cannot reasonably be made.

10. Investments

The Company owns 50% of TerraSea Environmental Solutions (“TerraSea”) as a joint venture. TerraSea is engaged in the environmental services business through its ability to remediate contaminated soil and dredged sediment treatment. At September 30, 2016 and December 31, 2015, the Company had net advances to TerraSea of $24,898 and $27,592, respectively, which are recorded in other current assets. The Company has an accumulated deficit in joint ventures, which represents losses recognized to date in excess of our investment in TerraSea, of $14,359 and $14,271 at September 30, 2016 and December 31, 2015, respectively, which is presented in accrued expenses. The Company has commenced the wind down of TerraSea with its joint venture partner. The Company believes its net advances to TerraSea are ultimately recoverable either through the operations of the joint venture or as an obligation of our joint venture partner. The joint venture partner has notified the Company that it disagrees with the amount of net advances to TerraSea. The Company believes that its joint venture partner remains obligated for its share of net advances, and any future advances necessary to complete TerraSea’s remaining project. During July 2015, the Company proposed taking a larger percent of the loss on a TerraSea project. Based on this proposal, the Company accrued $1,506 at June 30, 2015 representing the estimated share of additional losses to be assumed. The joint venture partner and the Company are continuing discussions. If those discussions do not lead to a resolution satisfactory to both parties, the joint venture partner and the Company will go to binding arbitration as stipulated by the TerraSea operating agreement. To the extent that net advances are not fully recoverable, additional losses may result in future periods. The Company and its joint venture partner remained obligated to fund TerraSea through the completion of its remaining project. The remaining TerraSea project was substantially complete at September 30, 2016.

11. Business combinations and dispositions

Discontinued operations

On April 23, 2014, the Company entered into an agreement and completed the sale of NASDI and Yankee, its two former subsidiaries that comprised our historical demolition business.  Under the terms of the agreement, the Company received cash of $5,309 and retained the right to receive additional proceeds based upon future collections of outstanding accounts receivable and work in process existing at the date of close, including recovery of outstanding claims for additional compensation from customers, net of future payments of accounts payable existing at the date of close, including any future payments of obligations associated with outstanding

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claims.  In the fourth quarter of 2013, the Company recorded a preliminary loss on disposal of assets held for sale in discontinued operations. The loss on disposal is subject to change based on the value of additional proceeds received on the working capital existing at the date of disposition.  The amount and timing of the working capital settlement and the amount and timing of the realization of additional net proceeds may be impacted by the litigation with the buyer of the historical demolition business. However, management believes that the ultimate resolution of these matters will not be material to the Company’s consolidated financial position or results of operations.

Magnus Pacific acquisition

On November 4, 2014, the Company acquired Magnus Pacific Corporation (“Magnus”), a California corporation, for an aggregate purchase price of approximately $40 million. Under the terms of the acquisition, the aggregate purchase price is satisfied by payment of $25,000 paid at closing, the issuance of a promissory note and an earnout payment. In the event Magnus did not achieve minimum earnings before interest, taxes, depreciation and amortization, as adjusted in the 2015 fiscal year, the principal amount of the promissory note would be reduced. Magnus did not reach the minimum EBITDA threshold for 2015 designated in the secured promissory note; therefore, during the second quarter of 2015, the Company reduced the remaining fair value by $7,013 to zero and the corresponding change was reflected in general and administrative expenses.

Under the terms of the acquisition, the maximum potential aggregate earnout (the “Earnout Payment”) will be determined based on the attainment of combined Adjusted EBITDA targets of Magnus and Terra for the year ending December 31, 2019. During the third quarter of 2016, the Company signed an amendment to the Magnus, now referred to as GLEI, share purchase agreement which modified the terms of the Earnout Payment. The Earnout Payment remains at $11,400and will be determined based on the attainment of an average Adjusted EBITDA target of GLEI for the years ending December 31, 2017, December 31, 2018 and December 31, 2019. The Earnout Payment may be paid in cash or shares of the Company’s common stock, at the Company’s option.

The Company remeasures the fair value of the contingent Earnout Payment based on projections of the earnings target for the business. Based on the Company’s projections at September 30, 2016, GLEI is not expected to reach the minimum Adjusted EBITDA threshold designated in the amended share purchase agreement; therefore, during the third quarter of 2016, the Company reduced the remaining fair value of $8,940 to zero and the corresponding change is reflected in general and administrative expenses and interest expense.

Other

During the third quarter of 2016, the Company entered into a definitive agreement (“Services Asset Sale Agreement”) to sell the assets associated with certain services lines of the environmental & infrastructure segment’s business, excluding the assets supporting the remediation service line. The Services Asset Sale Agreement was subject to customary closing conditions and financing approval. Subsequent to the end of the third quarter of 2016, the Company amended the terms of the Services Asset Sale Agreement to exclude certain assets thereby reducing the purchase price and extending the anticipated closing date to December 15, 2016. The Company completed the sale of a portion of these assets which were excluded from the Services Asset Sale Agreement to a separate party subsequent to the end of the third quarter of 2016.

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12. Segment information

The Company and its subsidiaries currently operate in two reportable segments: dredging and environmental & infrastructure, previously referred to as the environment & remediation segment. The Company’s financial reporting systems present various data for management to run the business, including profit and loss statements prepared according to the segments presented. Management uses operating income to evaluate performance between the two segments. Segment information for the periods presented is provided as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Dredging
Contract revenues	$	154,448		$	162,526		$	453,122		$	506,700
Operating income		5,553			19,598			26,762			45,587
Environmental & infrastructure
Contract revenues	$	44,565		$	60,451		$	103,437		$	131,929
Operating income (loss)		7,307			(9,906	)		(10,173	)		(29,164	)
Intersegment revenues	$	(144	)	$	(2,175	)	$	(2,379	)	$	(4,393	)
Total
Contract revenues	$	198,869		$	220,802		$	554,180		$	634,236
Operating income		12,860			9,692			16,589			16,423

Foreign dredging revenue of $21,139 and $34,331 for the three and nine months ended September 30, 2016, respectively, was attributable to work done in the Middle East. Foreign dredging revenue for the three and nine months ended September 30, 2015 was $38,042 and $127,280, respectively.

The majority of the Company’s long-lived assets are marine vessels and related equipment. At any point in time, the Company may employ certain assets outside of the U.S., as needed, to perform work on the Company’s foreign projects.

13. Subsidiary guarantors

The Company’s long-term debt at September 30, 2016 includes $275,000 of 7.375% senior notes due February 1, 2019. The Company’s obligations under these senior unsecured notes are guaranteed by the Company’s 100% owned domestic subsidiaries. Such guarantees are full, unconditional and joint and several.

The following supplemental financial information sets forth for the Company’s subsidiary guarantors (on a combined basis), the Company’s non-guarantor subsidiaries (on a combined basis) and Great Lakes Dredge & Dock Corporation, exclusive of its subsidiaries (“GLDD Corporation”):

(i) balance sheets as of September 30, 2016 and December 31, 2015;

(ii) statements of operations and comprehensive income (loss) for the three and nine months ended September 30, 2016 and 2015; and

(iii) statements of cash flows for the nine months ended September 30, 2016 and 2015.

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GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF SEPTEMBER 30, 2016
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	13,064		$	529	$	2	$	—		$	13,595
Accounts receivable — net		115,335			418		—		—			115,753
Contract revenues in excess of billings		73,765			2,078		—		—			75,843
Inventories		35,734			—		—		—			35,734
Prepaid expenses and other current assets		77,988			185		168		—			78,341
Total current assets		315,886			3,210		170		—			319,266
PROPERTY AND EQUIPMENT—Net		436,684			7		—		—			436,691
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		85,314			—		—		—			85,314
INVENTORIES — Noncurrent		48,706			—		—		—			48,706
INVESTMENTS IN JOINT VENTURES		5,791			—		—		—			5,791
RECEIVABLES FROM AFFILIATES		10,982			6,637		85,327		(102,946	)		—
INVESTMENTS IN SUBSIDIARIES		3,551			—		640,658		(644,209	)		—
OTHER		7,558			1		807		—			8,366
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	108,883		$	372	$	—	$	—		$	109,255
Accrued expenses		52,424			764		4,177		—			57,365
Revolving Credit Facility		—			—		60,000		—			60,000
Billings in excess of contract revenues		9,557			120		—		—			9,677
Current portion of long term debt		1,449			—		10,296		—			11,745
Total current liabilities		172,313			1,256		74,473		—			248,042
7 3/8% SENIOR NOTES		—			—		272,748		—			272,748
NOTES PAYABLE		220			—		44,792		—			45,012
DEFERRED INCOME TAXES		(794	)		—		74,547		—			73,753
PAYABLES TO AFFILIATES		91,359			5,926		5,661		(102,946	)		—
OTHER		9,838			—		164		—			10,002
Total liabilities		272,936			7,182		472,385		(102,946	)		649,557
TOTAL EQUITY		641,536			2,673		254,577		(644,209	)		254,577
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134

21

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF DECEMBER 31, 2015
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	12,035		$	2,147	$	2	$	—		$	14,184
Accounts receivable — net		129,978			799		—		—			130,777
Contract revenues in excess of billings		79,477			1,718		—		—			81,195
Inventories		35,963			—		—		—			35,963
Prepaid expenses and other current assets		66,919			218		477		—			67,614
Total current assets		324,372			4,882		479		—			329,733
PROPERTY AND EQUIPMENT—Net		430,192			18		—		—			430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		86,004			—		—		—			86,004
INVENTORIES — Noncurrent		41,646			—		—		—			41,646
INVESTMENTS IN JOINT VENTURES		3,761			—		—		—			3,761
RECEIVABLES FROM AFFILIATES		18,326			6,009		70,738		(95,073	)		—
INVESTMENTS IN SUBSIDIARIES		3,706			—		621,984		(625,690	)		—
OTHER		6,702			3		65		—			6,770
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	118,619		$	227	$	—	$	—		$	118,846
Accrued expenses		62,861			509		8,907		—			72,277
Billings in excess of contract revenues		6,964			97		—		—			7,061
Current portion of long term debt		1,424			—		6,082		—			7,506
Total current liabilities		189,868			833		14,989		—			205,690
7 3/8% SENIOR NOTES		—			—		271,998		—			271,998
REVOLVING CREDIT FACILITY		—			—		20,000		—			20,000
NOTE PAYABLE		323			—		53,469		—			53,792
DEFERRED INCOME TAXES		(783	)		—		74,789		—			74,006
PAYABLES TO AFFILIATES		85,859			3,505		5,709		(95,073	)		—
OTHER		20,326			—		139		—			20,465
Total liabilities		295,593			4,338		441,093		(95,073	)		645,951
TOTAL EQUITY		619,116			6,574		252,173		(625,690	)		252,173
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124

22

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	198,100		$	1,333		$	—		$	(564	)	$	198,869
Costs of contract revenues		(177,032	)		(2,356	)		—			564			(178,824	)
Gross profit		21,068			(1,023	)		—			—			20,045
OPERATING EXPENSES:
General and administrative expenses		7,185			—			2			—			7,187
Gain on sale of assets—net		(2	)		—			—			—			(2	)
Operating income (loss)		13,885			(1,023	)		(2	)		—			12,860
Interest expense—net		896			—			(5,715	)		—			(4,819	)
Equity in earnings (loss) of subsidiaries		(3	)		—			13,041			(13,038	)		—
Equity in earnings of joint ventures		6			—			—			—			6
Other expense		(637	)		—			—			—			(637	)
Income (loss) before income taxes		14,147			(1,023	)		7,324			(13,038	)		7,410
Income tax provision		—			(86	)		(2,764	)		—			(2,850	)
Net income (loss)	$	14,147		$	(1,109	)	$	4,560		$	(13,038	)	$	4,560
Comprehensive income (loss)	$	14,130		$	(1,070	)	$	4,582		$	(13,060	)	$	4,582

23

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	216,993		$	4,402		$	—		$	(593	)	$	220,802
Costs of contract revenues		(193,955	)		(3,355	)		—			593			(196,717	)
Gross profit		23,038			1,047			—			—			24,085
OPERATING EXPENSES:
General and administrative expenses		15,277			—			—			—			15,277
Gain on sale of assets—net		(884	)		—			—			—			(884	)
Operating income		8,645			1,047			—			—			9,692
Interest expense—net		(90	)		—			(7,203	)		—			(7,293	)
Equity in earnings of subsidiaries		2			—			8,144			(8,146	)		—
Equity in loss of joint ventures		(2,051	)		—			—			—			(2,051	)
Other income		706			—			—			—			706
Income before income taxes		7,212			1,047			941			(8,146	)		1,054
Income tax (provision) benefit		7			(120	)		(629	)		—			(742	)
Net income	$	7,219		$	927		$	312		$	(8,146	)	$	312
Comprehensive income (loss)	$	7,219		$	288		$	(327	)	$	(7,507	)	$	(327	)

24

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	554,388		$	1,333		$	—		$	(1,541	)	$	554,180
Costs of contract revenues		(486,220	)		(5,210	)		—			1,541			(489,889	)
Gross profit		68,168			(3,877	)		—			—			64,291
OPERATING EXPENSES:
General and administrative expenses		47,076			4			(53	)		—			47,027
Loss on sale of assets—net		675			—			—			—			675
Operating income (loss)		20,417			(3,881	)		53			—			16,589
Interest expense—net		531			—			(16,974	)		—			(16,443	)
Equity in earnings (loss) of subsidiaries		(181	)		—			15,082			(14,901	)		—
Equity in earnings of joint ventures		19			—			—			—			19
Other expense		(1,910	)		(8	)		—			—			(1,918	)
Income (loss) before income taxes		18,876			(3,889	)		(1,839	)		(14,901	)		(1,753	)
Income tax (provision) benefit		—			(86	)		645			—			559
Net income (loss)	$	18,876		$	(3,975	)	$	(1,194	)	$	(14,901	)	$	(1,194	)
Comprehensive income (loss)	$	18,859		$	(3,379	)	$	(615	)	$	(15,480	)	$	(615	)

25

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	624,498		$	11,912		$	—		$	(2,174	)	$	634,236
Costs of contract revenues		(558,343	)		(11,013	)		—			2,174			(567,182	)
Gross profit		66,155			899			—			—			67,054
OPERATING EXPENSES:
General and administrative expenses		48,768			—			—			—			48,768
Impairment of goodwill		2,750			—			—			—			2,750
Gain on sale of assets—net		(887	)		—			—			—			(887	)
Operating income		15,524			899			—			—			16,423
Interest expense—net		(349	)		—			(18,141	)		—			(18,490	)
Equity in earnings of subsidiaries		6			—			9,663			(9,669	)		—
Equity in loss of joint ventures		(5,765	)		—			—			—			(5,765	)
Other expense		(346	)		(7	)		—			—			(353	)
Income (loss) before income taxes		9,070			892			(8,478	)		(9,669	)		(8,185	)
Income tax (provision) benefit		7			(300	)		3,124			—			2,831
Net income (loss)	$	9,077		$	592		$	(5,354	)	$	(9,669	)	$	(5,354	)
Comprehensive income (loss)	$	9,077		$	(802	)	$	(6,748	)	$	(8,275	)	$	(6,748	)

26

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Cash provided by (used in) operating activities	$	36,242		$	(3,096	)	$	(20,168	)	$	—		$	12,978
INVESTING ACTIVITIES:
Purchases of property and equipment		(58,842	)		—			—			—			(58,842	)
Proceeds from dispositions of property and equipment		10,455			—			—			—			10,455
Net change in accounts with affiliates		10,505			—			—			(10,505	)		—
Net cash flows used in investing activities		(37,882	)		—			—			(10,505	)		(48,387	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(332	)		—			(332	)
Repayments of long term note payable		—			—			(803	)		—			(803	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayments of equipment debt		(1,064	)		—			—			—			(1,064	)
Net change in accounts with affiliates		26,733			1,452			(38,690	)		10,505			—
Intercompany dividends		(23,000	)		—			23,000			—			—
Exercise of options and purchases from employee stock plans		—			—			905			—			905
Taxes paid on settlement of vested share awards		—			—			(162	)		—			(162	)
Borrowings under revolving loans		—			—			133,000			—			133,000
Repayments of revolving loans		—			—			(93,000	)		—			(93,000	)
Net cash flows provided by financing activities		2,669			1,452			20,168			10,505			34,794
Effect of foreign currency exchange rates on cash and cash equivalents		—			26			—			—			26
Net increase (decrease) in cash and cash equivalents		1,029			(1,618	)		—			—			(589	)
Cash and cash equivalents at beginning of period		12,035			2,147			2			—			14,184
Cash and cash equivalents at end of period	$	13,064		$	529		$	2		$	—		$	13,595

27

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	$	15,013		$	(1,308	)	$	(17,602	)	$	—		$	(3,897	)
INVESTING ACTIVITIES:
Purchases of property and equipment		(53,394	)		—			—			—			(53,394	)
Proceeds from dispositions of property and equipment		1,167			—			—			—			1,167
Net change in accounts with affiliates		(29,059	)		—			(9,839	)		38,898			—
Net cash flows used in investing activities		(81,286	)		—			(9,839	)		38,898			(52,227	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(29	)		—			(29	)
Repayments of long term note payable		—			—			(488	)		—			(488	)
Taxes paid on settlement of vested share awards		—			—			(265	)		—			(265	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayment of equipment debt		(853	)		—			—			—			(853	)
Proceeds from equipment debt		—			—			410			—			410
Net change in accounts with affiliates		17,416			1,355			20,127			(38,898	)		—
Capital contributions		16,800			—			(16,800	)		—			—
Exercise of options and purchases from employee stock plans		—			—			1,356			—			1,356
Excess income tax benefit from share-based compensation		—			—			(13	)		—			(13	)
Treasury stock		—			—			(1,107	)		—			(1,107	)
Borrowings under revolving loans		—			—			146,000			—			146,000
Repayments of revolving loans		—			—			(118,000	)		—			(118,000	)
Net cash flows provided by financing activities		33,363			1,355			27,441			(38,898	)		23,261
Effect of foreign currency exchange rates on cash and cash equivalents		—			(105	)		—			—			(105	)
Net decrease in cash and cash equivalents		(32,910	)		(58	)		—			—			(32,968	)
Cash and cash equivalents at beginning of period		41,724			663			2			—			42,389
Cash and cash equivalents at end of period	$	8,814		$	605		$	2		$	—		$	9,421

28

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Cautionary note regarding forward-looking statements

Certain statements in this Quarterly Report on Form 10-Q may constitute “forward-looking” statements as defined in Section 27A of the Securities Act of 1933 (the “Securities Act”), Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), the Private Securities Litigation Reform Act of 1995 (the “PSLRA”) or in releases made by the Securities and Exchange Commission (“SEC”), all as may be amended from time to time. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause the actual results, performance or achievements of Great Lakes Dredge & Dock Corporation and its subsidiaries (“Great Lakes” or the “Company”), or industry results, to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. Statements that are not historical fact are forward-looking statements. Forward-looking statements can be identified by, among other things, the use of forward-looking language, such as the words “plan,” “believe,” “expect,” “anticipate,” “intend,” “estimate,” “project,” “may,” “would,” “could,” “should,” “seeks,” or “scheduled to,” or other similar words, or the negative of these terms or other variations of these terms or comparable language, or by discussion of strategy or intentions. These cautionary statements are being made pursuant to the Securities Act, the Exchange Act and the PSLRA with the intention of obtaining the benefits of the “safe harbor” provisions of such laws. Great Lakes cautions investors that any forward-looking statements made by Great Lakes are not guarantees or indicative of future performance. Important assumptions and other important factors that could cause actual results to differ materially from those forward-looking statements with respect to Great Lakes, include, but are not limited to, risks and uncertainties that are described in Item 1A. “Risk Factors” of Great Lakes’ Annual Report on Form 10-K for the year ended December 31, 2015, and in other securities filings by Great Lakes with the SEC.

Although Great Lakes believes that its plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, actual results could differ materially from a projection or assumption in any forward-looking statements. Great Lakes’ future financial condition and results of operations, as well as any forward-looking statements, are subject to change and inherent risks and uncertainties. The forward-looking statements contained in this Quarterly Report on Form 10-Q are made only as of the date hereof and Great Lakes does not have or undertake any obligation to update or revise any forward-looking statements whether as a result of new information, subsequent events or otherwise, unless otherwise required by law.

General

The Company is the largest provider of dredging services in the United States and a major provider of environmental and infrastructure services. In addition, the Company is the only U.S. dredging service provider with significant international operations. The mobility of the Company’s fleet enables the Company to move equipment in response to changes in demand for dredging services.

Dredging generally involves the enhancement or preservation of navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Domestically, our work generally is performed in coastal waterways and deep water ports. The U.S. dredging market consists of four primary types of work: capital, coastal protection, maintenance and rivers & lakes. The Company’s bid market is defined as the aggregate dollar value of domestic dredging projects on which the Company bid or could have bid if not for capacity constraints (“bid market”). The Company experienced an average combined bid market share in the U.S. of 49% over the prior three years, including 66%, 44%, 32% and 58% of the domestic capital, coastal protection, maintenance and rivers & lakes sectors, respectively.

The Company’s largest domestic dredging customer is the U.S. Army Corps of Engineers (the “Corps”), which has responsibility for federally funded projects related to navigation and flood control of U.S. waterways. In the first nine months of 2016, the Company’s dredging revenues earned from contracts with federal government agencies, including the Corps as well as other federal entities such as the U.S. Coast Guard and the U.S. Navy were approximately 62% of dredging revenues, in line with the Company’s prior three year average of 62%.

The Company’s environmental & infrastructure segment, previously referred to as the environmental & remediation segment, provides environmental and geotechnical construction as well as soil, water and sediment environmental remediation for the state, local and private party markets. Environmental and geotechnical construction includes the creation, repair or stabilization of environmental barriers including slurry walls, in-situ stabilization, coal combustion residuals pond cap and close, dam and levee rehabilitation and other specialty civil construction. Remediation involves the containment, immobilization or removal of contamination from an environment through the use of any combination of isolation, treatment, or exhumation techniques including off-site disposal based on the quantity and severity of the contamination. The environmental & infrastructure segment, which is comprised of Great Lakes Environmental & Infrastructure, LLC (“GLEI”), previously referred to as Magnus Pacific, LLC, and Terra Contracting Services, LLC (“Terra”), accounted for 19% of total revenues in the first nine months of 2016.

29

The Company has two operating segments: dredging and environmental & infrastructure, which are also the Company’s two reportable segments. The Company has determined that dredging, GLEI and Terra are the Company’s three reporting units.

Results of operations

The following tables set forth the components of net income (loss) and Adjusted EBITDA, as defined below, as a percentage of contract revenues for the three and nine months ended September 30, 2016 and 2015:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Contract revenues		100.0	%		100.0	%		100.0	%		100.0	%
Costs of contract revenues		(89.9	)		(89.1	)		(88.4	)		(89.4	)
Gross profit		10.1			10.9			11.6			10.6
General and administrative expenses		3.6			6.9			8.5			7.7
Impairment of goodwill		—			—			—			0.4
(Gain) loss on sale of assets—net		—			(0.4	)		0.1			(0.1	)
Operating income		6.5			4.4			3.0			2.6
Interest expense—net		(2.4	)		(3.3	)		(3.0	)		(2.9	)
Equity in earnings (loss) of joint ventures		—			(0.9	)		—			(0.9	)
Other income (expense)		(0.3	)		0.3			(0.3	)		(0.1	)
Income (loss) before income taxes		3.8			0.5			(0.3	)		(1.3	)
Income tax (provision) benefit		(1.4	)		(0.3	)		0.1			0.4
Net income (loss)		2.4			0.1			(0.2	)		(0.8	)
Adjusted EBITDA		14.6	%		10.4	%		10.9	%		9.6	%

30

Adjusted EBITDA, as provided herein, represents net income, adjusted for net interest expense, income taxes, depreciation and amortization expense, debt extinguishment, accelerated maintenance expense for new international deployments, goodwill or asset impairments and gains on bargain purchase acquisitions. Adjusted EBITDA is not a measure derived in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Company presents Adjusted EBITDA as an additional measure by which to evaluate the Company’s operating trends. The Company believes that Adjusted EBITDA is a measure frequently used to evaluate the performance of companies with substantial leverage and that the Company’s primary stakeholders (i.e., its stockholders, bondholders and banks) use Adjusted EBITDA to evaluate the Company’s period to period performance. Additionally, management believes that Adjusted EBITDA provides a transparent measure of the Company’s recurring operating performance and allows management to readily view operating trends, perform analytical comparisons and identify strategies to improve operating performance. For this reason, the Company uses a measure based upon Adjusted EBITDA to assess performance for purposes of determining compensation under the Company’s incentive plan. Adjusted EBITDA should not be considered an alternative to, or more meaningful than, amounts determined in accordance with GAAP including: (a) operating income as an indicator of operating performance; or (b) cash flows from operations as a measure of liquidity. As such, the Company’s use of Adjusted EBITDA, instead of a GAAP measure, has limitations as an analytical tool, including the inability to determine profitability or liquidity due to the exclusion of accelerated maintenance expense for new international deployments, goodwill or asset impairments, gains on bargain purchase acquisitions, interest and income tax expense and the associated significant cash requirements and the exclusion of depreciation and amortization, which represent significant and unavoidable operating costs given the level of indebtedness and capital expenditures needed to maintain the Company’s business. For these reasons, the Company uses operating income to measure the Company’s operating performance and uses Adjusted EBITDA only as a supplement. The following is a reconciliation of Adjusted EBITDA to net income (loss):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016			2015
(in thousands)
Net income (loss)	$	4,560	$	312	$	(1,194	)	$	(5,354	)
Adjusted for:
Interest expense—net		4,819		7,293		16,443			18,490
Income tax provision (benefit)		2,850		742		(559	)		(2,831	)
Depreciation and amortization		16,872		14,722		45,692			47,747
Impairment of goodwill		—		—		—			2,750
Adjusted EBITDA	$	29,101	$	23,069	$	60,382		$	60,802

The following table sets forth, by segment and type of work, the Company’s contract revenues for each of the periods indicated:

	Three Months Ended									Nine Months Ended
	September 30,									September 30,
Revenues (in thousands)	2016			2015			Change			2016			2015			Change
Dredging:
Capital—U.S.	$	59,811		$	43,963			36.0	%	$	152,083		$	149,062			2.0	%
Capital—foreign		21,139			38,042			(44.4	)%		34,331			127,280			(73.0	)%
Coastal protection		47,983			46,441			3.3	%		152,622			118,089			29.2	%
Maintenance		11,320			21,453			(47.2	)%		77,544			89,729			(13.6	)%
Rivers & lakes		14,195			12,627			12.4	%		36,542			22,540			62.1	%
Total dredging revenues		154,448			162,526			(5.0	)%		453,122			506,700			(10.6	)%
Environmental & infrastructure		44,565			60,451			(26.3	)%		103,437			131,929			(21.6	)%
Intersegment revenue		(144	)		(2,175	)		(93.4	)%		(2,379	)		(4,393	)		(45.8	)%
Total revenues	$	198,869		$	220,802			(9.9	)%	$	554,180		$	634,236			(12.6	)%

Total revenue for the 2016 third quarter was $198.9 million, a decrease of $21.9 million, or 10%, compared to revenue of $220.8 million in the third quarter of 2015. For the nine months ended September 30, 2016, total revenue was $554.2 million, down from $634.2 million for the same period in the prior year, representing a decrease of $80.1 million or 13%. For the nine months ended September 30, 2016, the Company experienced decreases in foreign capital, maintenance and environmental & infrastructure revenues which were slightly offset by increases in coastal protection, domestic capital and rivers & lakes revenues.

Capital dredging consists primarily of port expansion projects, which involve the deepening of channels and berthing basins to allow access by larger, deeper draft ships and the provision of land fill used to expand port facilities. In addition to port work, capital projects also include coastal restoration and land reclamations, trench digging for pipelines, tunnels and cables, and other dredging

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related to the construction of breakwaters, jetties, canals and other marine structures. Domestic capital dredging revenue increased by $15.8 million, or 36%, to $59.8 million, in the 2016 third quarter compared to the same period in 2015. For the nine months ended September 30, 2016, domestic capital dredging was $152.1 million compared to $149.1 million for the same period in 2015. The slight increase in domestic capital dredging revenues for the nine months ended September 30, 2016 was largely attributable to revenue earned on coastal restoration projects in Louisiana and the Savannah Harbor deepening project. The increased revenue from these projects during the first three quarters of 2016 was mostly offset by revenue earned on the PortMiami deepening project during the same period of 2015 that did not repeat in the current year. Further, work on a deepening project on the Delaware River and a liquefied natural gas (“LNG”) project in Texas also contributed to revenue for the nine months ended September 30, 2016.

Foreign capital projects typically involve land reclamations, channel deepening and port infrastructure development. In the third quarter of 2016, foreign dredging revenue was $21.1 million, a decrease of $16.9 million, or 44%, from the same quarter in the prior year. Foreign capital revenue for the first nine months of 2016 was $34.3 million, a decrease of $92.9 million, or 73%, as compared to the same period in the prior year. Revenue for the nine months ended September 30, 2016 was driven by a project in Saudi Arabia, two projects in Bahrain and the final stages of demobilization on the Suez Canal project. In comparison, revenue for the first nine months of 2015 was driven by a greater amount of revenue earned on the Suez Canal deepening project, in addition to several projects in Brazil that did not repeat in the current year period.

Coastal protection projects generally involve moving sand from the ocean floor to shoreline locations where erosion threatens shoreline assets. Coastal protection revenue was $48.0 million in the third quarter of 2016, up $1.5 million or 3%, compared to the 2015 third quarter. For the nine months ended September 30, 2016, coastal protection was $152.6 million, up $34.5 million or 29%, from $118.1 million for the same period in 2015. The increase in coastal protection revenue for the first nine months of 2016 was attributable to a greater amount of revenue earned on large projects in New Jersey and New York for the repair of shorelines damaged as a result of Superstorm Sandy and recent winter storms. Further, three projects in Florida also contributed to coastal protection revenue in the first three quarters of 2016.

Maintenance dredging consists of the re-dredging of previously deepened waterways and harbors to remove silt, sand and other accumulated sediments. Maintenance revenue for the third quarter of 2016 was $11.3 million, a decrease of $10.1 million, or 47%, compared to revenue of $21.5 million for the same period in 2015. For the nine months ended September 30, 2016, maintenance revenue was $77.5 million, down $12.2 million, or 14%, from $89.7 million for the same period in the prior year. The decrease in maintenance dredging revenues for the first nine months of 2016 was mostly attributable to revenue earned on several harbor projects in Florida during the prior year period that did not repeat in the first three quarters of 2016.  This decrease was partially offset by revenue earned on a significant harbor project in Maryland and maintenance dredging work in Georgia and Massachusetts.

Rivers & lakes dredging and related operations typically consist of lake and river dredging, inland levee and construction dredging, environmental restoration and habitat improvement and other marine construction projects. Rivers & lakes revenue in the third quarter of 2016 was $14.2 million, an increase of $1.6 million, or 12%, compared to the third quarter of 2015. For the nine months ended September 30, 2016, rivers & lakes revenue was $36.5 million, up $14.0 million, or 62%, from $22.5 million in the same prior year period. The increase in rivers & lakes revenue for the first nine months of 2016 was driven by revenue earned on a reservoir project in Kansas. Further, work on a lake project in Illinois as well as on projects in Mississippi and New Jersey also contributed to revenue for the first three quarters of 2016.

The environmental & infrastructure segment’s services include environmental and geotechnical construction, specifically, slurry wall construction, in-situ stabilization, large scale reclamation, and habitat restoration. In addition, the segment provides remediation services which involve the containment, immobilization or removal of contamination from an environment through the use of any combination of isolation, treatment, or exhumation techniques including off-site disposal based on the quantity and severity of the contamination. The environmental & infrastructure segment recorded revenues of $44.6 million for the quarter ended September 30, 2016, down 26% compared to $60.5 million for the same period in 2015. For the nine months ended September 30, 2016, environmental & infrastructure revenue was $103.4 million, a $28.5 million, or 22%, decrease from $131.9 million for the same prior year period. Environmental & infrastructure revenue for the first nine months of 2016 included work on a large mine project in Washington as well as on remediation projects in Michigan and Indiana and a geotechnical project in California. The decrease in revenue during the first three quarters of 2016 was mostly attributable to a greater amount of revenue earned on remediation projects in the Midwest, California and New Jersey during the same period in the prior year.

Consolidated gross profit for the 2016 third quarter decreased by $4.0 million, or 17%, to $20.0 million, from $24.1 million in the third quarter of 2015. Gross profit margin (gross profit divided by revenue) for the 2016 third quarter declined slightly to 10.1% from 10.9% for the three months ended September 30, 2015. For the nine months ended September 30, 2016, the Company had a consolidated gross profit of $64.3 million, down $2.8 million or 4%, compared to $67.1 million in the same period of the prior year. Gross profit margin for the nine months ended September 30, 2016 increased to 11.6% from 10.6% in the same prior year period. The decrease in gross profit for the nine months ended September 30, 2016 was driven by the absence of the strong contract margin on the

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Suez Canal deepening project during the current year period. This decrease was partially offset by strong performance on several coastal protection, rivers & lakes and maintenance projects which positively impacted margins. Improved project execution in the environmental & infrastructure segment also contributed to gross profit for the first three quarters of 2016. In comparison, gross profit in the prior year period was negatively impacted by unforeseen circumstances that lead to project delays on two of the environmental & infrastructure’s largest projects during the third quarter of 2015. Additionally, the environmental & infrastructure segment experienced losses on several projects during the nine months ended September 30, 2016. These losses were partially offset by strong contract margin on our Suez Canal project.

General and administrative expenses totaled $7.2 million for the quarter ended September 30, 2016, down from general and administrative expenses of $15.3 million in the third quarter of 2015. For the nine months ended September 30, 2016 and 2015, general and administrative expenses totaled $47.0 million and $48.8 million, respectively. A decrease in amortization expense of $4.9 million, mostly related to the Magnus acquisition, slightly offset by an increase of legal and professional fees of $2.8 million contributed to the decline in general and administrative expenses during the first nine months of 2016. Further, the Company reduced the remaining fair value of the GLEI contingent earnout by $8.0 million to zero during the third quarter of 2016. Similarly, general and administrative expenses for the first nine months of 2015 include a reduction in the value of the GLEI seller note payable of $7.0 million.

Operating income for the three months ended September 30, 2016 was $12.9 million, an increase of $3.2 million, compared to operating income of $9.7 million for the same period of 2015. For the nine months ended September 30, 2016, the Company experienced operating income of $16.6 million, up $0.2 million, or 1%, from $16.4 million in the same prior year period. The change in the Company’s operating income for the first nine months of 2016 was attributable to a decrease in general and administrative expenses, offset by a decrease in gross profit, as described above, as well a $0.7 million loss related to the sale of an underutilized dredge during the current year period. Further, operating income for the nine months ended September 30, 2015 included a $2.8 million goodwill impairment charge at the Terra reporting unit.

Net interest expense totaled $4.8 million for the three months ended September 30, 2016, a decrease from interest expense of $7.3 million from the same period of 2015. For the nine months ended September 30, 2016, interest expense was $16.4 million, down $2.0 million, or 11%, from interest expense of $18.5 million for the same period in the prior year. The decrease in interest expense was mostly attributable to lower interest expense associated with the Company’s revolving credit facility and the reversal of interest expense associated with the GLEI contingent earnout during the nine months ended September 30, 2016.

The income tax provision for the three months ended September 30, 2016 was $2.9 million compared to $0.7 million for the 2015 third quarter. For the nine months ended September 30, 2016 and 2015, the income tax benefit was $0.6 million and $2.8 million, respectively. The effective tax rate for the nine months ended September 30, 2016 was 31.9%, down slightly from the effective tax rate of 34.6% for the same period of 2015.

The Company experienced net income of $4.6 million and earnings per diluted share of $0.08 for the 2016 third quarter compared to net income of $0.3 million and no earnings per diluted share for the same period of 2015. For the nine months ended September 30, 2016, the Company had a net loss of $1.2 million and a loss per diluted share of $0.02 compared to a net loss of $5.4 million with a loss per diluted share of $0.09 for the same period of 2015. The change in net loss for the first nine months of 2016 was driven by losses at two of the Company’s joint ventures which resulted in equity in loss of joint ventures of $5.8 million during the same period in 2015. Additionally, lower interest expense and slightly higher operating income, as described above, positively impacted the change in net loss for the nine months ended September 30, 2016.

Adjusted EBITDA (as defined on page 31) for the three months ended September 30, 2016 and 2015 was $29.1 million and $23.1 million, respectively. For the nine months ended September 30, 2016, Adjusted EBITDA was $60.4 million, in line with Adjusted EBITDA of $60.8 million for the same prior year period. The change in Adjusted EBITDA during the current year period was attributable to slightly higher operating income during the first nine months of 2016 as described above. This slight increase was offset by higher depreciation and amortization expense as compared to the current year period.

Results by segment

Dredging

Dredging segment revenues for the 2016 third quarter were $154.4 million, a decrease of $8.1 million, or 5%, compared to $162.5 million for the quarter ended September 30, 2015. For the nine months ended September 30, 2016, dredging segment revenues were $453.1 million, down $53.6 million, or 11%, compared to revenues of $506.7 million for the same prior year period. For the nine months ended September 30, 2016, the dredging segment experienced decreases in foreign capital and maintenance revenues which were partially offset by increases in coastal protection, domestic capital and rivers & lakes revenues. Current year revenues were

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driven by large coastal protection projects in New Jersey and New York for the repair of shorelines damaged as a result of Superstorm Sandy and recent winter storm events, the Savannah Harbor deepening project, coastal restoration projects in Louisiana, a reservoir project in Kansas and harbor maintenance dredging work in Maryland.

Dredging segment gross profit in the third quarter of 2016 decreased 44% to $16.5 million compared to $29.4 million in the same period of the prior year. Dredging segment gross profit margin for the three months ended September 30, 2016 decreased to 10.7% from 18.1% for the same prior year period. For the nine months ended September 30, 2016, the dredging segment gross profit was $63.9 million down from a gross profit of $78.1 million in the same period of 2015. Further, dredging segment gross profit margin for the nine months ended September 30, 2016 decreased to 14.1% from gross profit margin of 15.4% for the first three quarters of 2015. The decline in dredging segment gross profit for the nine months ended September 30, 2016 was driven by the absence of the strong contract margin on the Suez Canal deepening project during the current year period. This decrease was partially offset by strong performance on several coastal protection, rivers & lakes and maintenance projects which positively impacted margins.

Operating income at the dredging segment for the three months ended September 30, 2016 decreased $14.0 million to $5.6 million from $19.6 million for the same period in 2015. For the nine months ended September 30, 2016, operating income was $26.8 million, an $18.8 million decline from $45.6 million in the first three quarters of 2015. The decrease in operating income for the first nine months of 2016 is the result of lower gross profit, described above, as well as an increase in general and administrative expenses, specifically related to a $3.9 million increase in legal and professional fees, partially offset by a $1.0 million decrease in payroll and benefits expenses. Further, dredging segment operating income for the nine months ended September 30, 2016 includes a $0.7 million loss related to the sale of an underutilized dredge.

Environmental & infrastructure

Environmental & infrastructure segment revenues for the quarter ended September 30, 2016 were $44.6 million, a decrease of $15.9 million, or 26%, compared to $60.5 million for the three months ended September 30, 2015. For the nine months ended September 30, 2016, environmental & infrastructure segment revenues were $103.4 million, down $28.5 million, or 22%, from revenue of $131.9 million for the first nine months of 2015. Environmental & infrastructure revenues for the first nine months of 2016 included work on a large mine project in Washington as well as on remediation projects in Michigan and Indiana and a geotechnical project in California. The decrease in revenue during the first nine months of 2016 was mostly attributable to a greater amount of revenue earned on remediation projects in the Midwest, California and New Jersey in the prior year period.

Environmental & infrastructure segment gross profit in the third quarter of 2016 was $3.5 million compared to negative gross profit of $5.4 million in the third quarter of 2015. For the three months ended September 30, 2016 and 2015, the environmental & infrastructure segment had a gross profit margin of 7.9% and negative gross profit margin of 8.9%, respectively. The environmental & infrastructure segment experienced a gross profit of $0.3 million and a negative gross profit of $11.0 million for the nine months ended September 30, 2016 and 2015, respectively. For the first nine months of 2016, the environmental & remediation segment experienced a gross profit margin of 0.3% compared to a negative gross profit margin of 8.4% for the same period of the prior year. For the nine months ended September 30, 2016, the environmental & infrastructure segment’s gross profit increased compared to the same period in the prior year, mostly attributable to strong performance on the Company’s large mine project in Washington. In comparison, the environmental & infrastructure segment’s gross profit in the first three quarters of 2015 was negatively impacted by unforeseen circumstances that lead to project delays on two of the segment’s largest projects during the third quarter of 2015.

The environmental & infrastructure segment experienced an operating income of $7.3 million and an operating loss of $9.9 million for the three months ended September 30, 2016 and 2015, respectively. For the nine months ended September 30, 2016, the environmental & infrastructure segment experienced an operating loss of $10.2 million, compared to $29.2 million for the same period of the prior year. The change in operating loss for the nine months ended September 30, 2016 is the result of the change in gross profit, as described above, and a decrease in general and administrative expenses, specifically, a decrease in amortization expense of $4.9 million, mostly related to the Magnus acquisition. During the third quarter of 2016, the Company reduced the remaining fair value of the GLEI contingent earnout by $8.0 million to zero. Similarly, general and administrative expenses for the first nine months of 2015 include a reduction in the value of the GLEI seller note payable of $7.0 million. Further, the Company recorded a $2.8 million goodwill impairment charge at the Terra reporting unit during the second quarter of 2015 which also impacted the change in operating loss.

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Bidding activity and backlog

The following table sets forth, by reporting segment and type of dredging work, the Company’s backlog as of the dates indicated:

	September 30,		December31,		September 30,
Backlog (in thousands)	2016		2015		2015
Dredging:
Capital - U.S.	$	285,907	$	411,506	$	363,633
Capital - foreign		33,834		1,750		14,260
Coastal protection		152,167		118,858		137,677
Maintenance		44,181		77,995		55,950
Rivers & lakes		54,131		67,589		73,314
Dredging Backlog		570,220		677,698		644,834
Environmental & infrastructure		32,530		73,349		111,886
Total Backlog	$	602,750	$	751,047	$	756,720

The Company’s contract backlog represents its estimate of the revenues that will be realized under the portion of the contracts remaining to be performed. For dredging contracts these estimates are based primarily upon the time and costs required to mobilize the necessary assets to and from the project site, the amount and type of material to be dredged and the expected production capabilities of the equipment performing the work. For environmental & infrastructure contracts, these estimates are based on the time and remaining costs required to complete the project relative to total estimated project costs and project revenues agreed to with the customer. However, these estimates are necessarily subject to variances based upon actual circumstances. Because of these factors, as well as factors affecting the time required to complete each job, backlog is not always indicative of future revenues or profitability. Also, 58% of the Company’s September 30, 2016 dredging backlog relates to federal government contracts, which can be canceled at any time without penalty to the government, subject to the Company’s contractual right to recover the Company’s actual committed costs and profit on work performed up to the date of cancellation. The Company’s backlog may fluctuate significantly from quarter to quarter based upon the type and size of the projects the Company is awarded from the bid market. A quarterly increase or decrease of the Company’s backlog does not necessarily result in an improvement or a deterioration of the Company’s business. The Company’s backlog includes only those projects for which the Company has obtained a signed contract with the customer.

The domestic dredging bid market for the 2016 quarter ended September 30, 2016 totaled $320.0 million, resulting in $668.1 million of work awarded in the first nine months of 2016. This represents a decrease of $369.3 million compared to the first nine months of 2015. Awards during the current year period include coastal protection projects in Virginia, New York and North Carolina, coastal restoration projects in Louisiana and Texas and maintenance projects in Texas, Louisiana, Maryland and Washington. The bid market for the nine months ended September 30, 2016 was down compared to the prior year primarily due to the award of the Savannah Harbor deepening project during the first quarter of 2015. For the contracts awarded in the current year, the Company won 80%, or $145.8 million of the coastal protection projects, 23%, or $27.2 million of the domestic capital projects, 14%, or $37.6 million of the maintenance projects and 16%, or $16.8 million of the rivers & lakes projects through September 30, 2016. The Company won 34% of the overall domestic bid market for the first nine months of 2016, which is below the Company’s prior three year average of 49%. Variability in contract wins from quarter to quarter is not unusual and one quarter’s win rate is generally not indicative of the win rate the Company is likely to achieve for a full year.

The Company’s contracted dredging backlog was $570.2 million at September 30, 2016 compared to $677.7 million of backlog at December 31, 2015. These amounts do not reflect approximately $30.1 million of domestic low bids pending formal award and additional phases (“options”) pending on projects currently in backlog at September 30, 2016. At December 31, 2015 the amount of domestic low bids and options pending award was $82.8 million.

Domestic capital dredging backlog at September 30, 2016 was $125.6 million lower than at December 31, 2015. During the first nine months of 2016, the Company was awarded a coastal restoration project in Louisiana. Additionally, the Company continued to earn revenue on a deepening project on the Delaware River, an LNG project in Texas, coastal restoration projects in Louisiana and the Savannah Harbor deepening project during the first three quarters of 2016. The Panama Canal expansion was completed during the second quarter of 2016, which continues to put pressure on the ports on the East Coast to continue with their studies and plans to deepen and widen in anticipation of the post-Panamax vessels. In April 2016, the federal court in New Orleans approved the October 2015 settlement, of approximately $20 billion, between the United States, the five Gulf States and BP for damages from the Deepwater Horizon oil spill. Louisiana will receive a minimum of $6.8 billion for claims related to natural resource damages under the Oil Pollution Act, Clean Water Act civil penalties, and the State’s various economic claims. Many of the Gulf States previously committed to spending a portion of the fines received to repair the natural resources impacted by the oil spill including on coastal restoration projects that include dredging. Although the bulk of the fines are to be paid over the next 15 to 18 years, the Company

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expects several coastal restoration projects envisioned by the States to come to fruition in the next couple of years providing a new source of domestic capital dredging projects on which the Company will bid.

Foreign capital dredging backlog at September 30, 2016 was $32.1 million higher than at December 31, 2015. During the first nine months of 2016, the Company was awarded two land reclamation and development projects in the Middle East and a port project in Brazil. Upcoming projects expected to be awarded are not being completed under the tight time constraints that were required on prior years’ large infrastructure projects. As a result, anticipated margins in the current year are expected to be lower than margins experienced internationally over the past several years. The world’s need for reclaimed land continues to expand to support global energy consumption, seaborne trade, population growth and tourism all of which are expected to add nearly 400 viable dredging projects over the next six years. Besides the Middle East, the Company is working on projects and continues to pursue ancillary work in South America where we have positioned a clamshell dredge and operate as a reputable regional provider. The Company expects the additional opportunities globally to provide a continued source of future international dredging revenue.

Coastal protection dredging backlog at September 30, 2016 was $33.3 million higher than at December 31, 2015. In the first nine months of 2016, the Company was awarded large coastal protection projects in Virginia and North Carolina as well as two projects in Florida and two Superstorm Sandy appropriated projects in New Jersey and New York. In the first nine months of 2016, the Company continued to earn revenue on several large coastal protection projects in New Jersey and New York as well as on projects in Florida that were in backlog at December 31, 2015. Funding related to Northeastern U.S. beach replenishment continues to be released and the Company is anticipating these new dredging projects along the coast to extend through 2017. Federal and state government actions continue to support the repair and improvement of America’s coastline through the completion of protective beaches and berms.

Maintenance dredging backlog was down $33.8 million from December 31, 2015. During the first nine months of 2016, the Company was awarded and completed a maintenance project in Louisiana. Projects in Maryland and Massachusetts were also awarded in the year with work expected to be started in 2017. During the first nine months of 2016, the Company continued to earn revenue on projects in Georgia, Maryland, Massachusetts, Pennsylvania and New York/New Jersey which were in backlog at December 31, 2015. The Water Resources Reform and Development Act (WRRDA) calls for full use of Harbor Maintenance Trust Fund (“HMTF”) within ten years for its intended purpose of maintaining future access to the waterways and ports that support our nation’s economy. Through the increased appropriation of HMTF monies, the Corps has substantially increased projects for maintenance dredging in the government’s fiscal year 2016. Despite the progress the House and Senate made on their budget bills, and the record level of funding provided to the Corps in both versions, including hitting the HMTF targets, it does not appear likely that a budget will be signed into law for fiscal year 2017. The Company expects the Corps’ funding to remain at the previous fiscal year’s level.

Rivers & lakes backlog at September 30, 2016 was down by $13.5 million from backlog at December 31, 2015. The Company was awarded projects in New Jersey and Mississippi during the first nine months of 2016. For the nine months ended September 30, 2016, the Company continued to earn revenue on a reservoir project in Kansas and a lake project in Illinois which were in backlog at December 31, 2015. The Corps’ work plan for fiscal year 2017 includes several upper Mississippi River projects to open channels that are often clogged by silt and sediment from upstream, in addition to planned levee repair along the Mississippi River. Additionally, the Company’s rivers & lakes dredges are well suited for marsh projects in Louisiana that are expected to be let to bid through the Coastal Protection and Restoration Authority over the next year.

Environmental & infrastructure services backlog decreased $40.8 million from December 31, 2015. During the first nine months of 2016, the Company continued to earn revenue on a large mine project in Washington as well as on remediation projects in Michigan and Indiana and a geotechnical project in California which were in backlog at December 31, 2015. Significant projects awarded to the Company in the nine months ended September 30, 2016 included two remediation projects, four geotechnical projects and an underground infrastructure project. The Company anticipates selling the assets associated with certain services lines of the environmental & infrastructure segment’s business, excluding the assets supporting the remediation service line including in progress contracts. As a result, backlog within these services lines of business is not expected to be converted into revenue. At September 30, 2016, backlog included $4.3 million of revenue remaining on projects within these services lines of business.  As part of the environmental & infrastructure segment’s initiatives, the Company intends to focus on geographical expansion in the geotechnical services business. Additionally, the Company anticipates additional contracting opportunities arising from the transformation of the U.S. energy infrastructure, specifically related to the remediation requirements as mandated by the Environmental Protection Agency’s rule to regulate the disposal of coal combustion residuals from electric utilities promulgated in June 2015.

Liquidity and capital resources

The Company’s principal sources of liquidity are net cash flows provided by operating activities and proceeds from previous issuances of long term debt. The Company’s principal uses of cash are to meet debt service requirements, finance capital expenditures, provide working capital and other general corporate purposes.

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The Company’s net cash provided by (used in) operating activities for the nine months ended September 30, 2016 and 2015 totaled $13.0 million and $(3.9) million, respectively. Normal increases or decreases in the level of working capital relative to the level of operational activity impact cash flow from operating activities. The increase in the first nine months of 2016 compared to the same period in the prior year was driven by the lower investment in working capital, specifically related to the final billings and collections on large projects completed late in 2015, during the current year period.

The Company’s net cash flows used in investing activities for the first nine months of 2016 and 2015 totaled $48.4 million and $52.2 million, respectively. Investing activities in both periods primarily relate to normal course upgrades and capital maintenance of the Company’s dredging fleet. During the nine months ended September 30, 2016, the Company spent $38.7 million on the construction of a dual mode articulated tug/barge trailing suction hopper dredge (“ATB”), compared to $24.3 million in the same period in the prior year. The Company received $10.0 million for the sale of an underutilized dredge during the current year period.

The Company’s net cash flows provided by financing activities for the nine months ended September 30, 2016 and 2015 totaled $34.8 million and $23.3 million, respectively. The increase in net cash flows provided by financing activities is primarily due to net borrowings on the Company’s revolver during the first nine months of 2016 of $40 million, compared to net borrowings of $28 million for the same period in the prior year.

On June 4, 2012, the Company entered into a senior revolving credit agreement, as subsequently amended, (the “Credit Agreement”) with certain financial institutions from time to time party thereto as lenders, Wells Fargo Bank, National Association, as Administrative Agent, Swingline Lender and an Issuing Lender, Bank of America, N.A., as Syndication Agent and PNC Bank, National Association, BMO Harris Bank N.A. and Fifth Third Bank, as Co-Documentation Agents. The Credit Agreement provides for a senior revolving credit facility in an aggregate principal amount of up to $199 million, multicurrency borrowings up to a $50 million sublimit and swingline loans up to a $10 million sublimit. The Credit Agreement also includes an incremental loans feature that will allow the Company to increase the senior revolving credit facility by an aggregate principal amount of up to $15 million. This feature is subject to lenders providing incremental commitments for such increase, provided that no default or event of default exists, and the Company being in pro forma compliance with the existing financial covenants, both before and after giving effect to the increase, and subject to other standard conditions.

The Company’s Credit Agreement matures on June 2, 2017 and the Company is in discussions with lenders to finalize a successor credit facility with substantially similar terms as the current Credit Agreement. The Company believes that it will finalize a successor credit facility, which will be an asset-based loan facility, in the fourth quarter of 2016.

On June 24, 2016, the Company entered into the seventh amendment to the Credit Agreement which modified the Credit Agreement to allow for the sale of the vessel known as the Reem Island and provided for the collateral release to affect the sale. The reduction in the collateral pool resulted in a reduction in the size of the Credit Facility, from $210 million to $199 million. In addition, the net cash proceeds of the sale of the Reem Island, $10 million, were applied to the revolving loans outstanding.

On June 30, 2016 the Company entered into the eighth amendment (the “Eighth Amendment”) to the Credit Agreement which increased the margin applicable to interest rates, letters of credit and commitment fees thereunder.   Depending on the Company’s consolidated total leverage ratio (as defined in the Credit Agreement and further described below), borrowings under the revolving credit facility will bear interest at the option of the Company at either the LIBOR rate plus a margin between 1.50% and 3.50% or a base rate plus a margin between 0.50% and 2.50%.

In addition, the Eighth Amendment modifies the consolidated total leverage covenant contained in the Credit Agreement and adds a maximum capital expenditures covenant. The Company may not permit the consolidated total leverage ratio to be greater than (i) 5.00 to 1.00 for the fiscal quarter ending June 30, 2016, (ii) 4.75 to 1.00 for the fiscal quarter ending September 30, 2016 and (iii) 4.50 to 1.00 for any fiscal quarter ending thereafter. Further, the Company and its subsidiaries may not allow its aggregate capital expenditures to exceed (i) $105 million for the fiscal year ending December 31, 2016 and (ii) $45 million during any fiscal year thereafter.

Last, the Eighth Amendment requires the Company and its subsidiaries party to the Credit Agreement to pledge their respective inventory as security for the revolving credit facility.

The Credit Agreement contains affirmative, negative and financial covenants customary for financings of this type. The Credit Agreement also contains customary events of default (including non-payment of principal or interest on any material debt and breaches of covenants) as well as events of default relating to certain actions by the Company’s surety bonding provider. The Credit Agreement requires the Company to maintain a minimum fixed charge coverage ratio of 1.25 to 1.00.

37

The obligations of Great Lakes under the Credit Agreement are unconditionally guaranteed, on a joint and several basis, by each existing and subsequently acquired or formed material direct and indirect domestic subsidiary of the Company. During a year, the Company frequently borrows and repays amounts under its revolving credit facility. As of September 30, 2016, the Company had $60.0 million of borrowings on the revolver and $68.9 million of letters of credit outstanding, resulting in $70.1 million of availability under the Credit Agreement. Borrowings under the line of credit may be limited based on the Company’s requirements to comply with its covenants. At September 30, 2016, the Company was in compliance with its various covenants under the Credit Agreement.

On November 4, 2014, the Company entered into a senior secured term loan facility consisting of a term loan in an aggregate principal amount of $50 million (the “Term Loan Facility”) pursuant to a Loan and Security Agreement, as subsequently amended, (the “Loan Agreement”) by and among, the lenders party thereto from time to time and Bank of America, N.A., as administrative agent. The Company borrowed an aggregate principal amount of $47.4 million in 2014 and an additional $2.6 million in 2015. The proceeds from the Term Loan Facility will be used for the working capital and general corporate purposes of the Company, including to repay borrowings under the Credit Agreement made to finance the construction of the Company’s ATB.

The Term Loan Facility has a term of 5 years. The borrowings under the Term Loan Facility bear interest at a fixed rate of 4.655% per annum. If an event of default occurs under the Loan Agreement, the interest rate will increase by 2.00% per annum during the continuance of such event of default.

The Term Loan Facility provides for monthly amortization payments, payable in arrears, which commenced on December 4, 2014, at an annual amount of (i) approximately 10% of the principal amount of the Term Loan Facility during the first two years of the term, (ii) approximately 20% of the principal amount of the Term Loan Facility during the third and fourth years of the term, and (iii) approximately 25% of the principal amount of the Term Loan Facility during the final year of the term, with the remainder due on the maturity date of the facility. In addition, the Company may optionally prepay the Term Loan Facility in whole or in part at any time, subject to a minimum prepayment amount.

The Loan Agreement includes representations, affirmative and negative covenants and events of default customary for financings of this type and includes the same financial covenants that are currently set forth in the Credit Agreement.

Performance and bid bonds are customarily required for dredging and marine construction projects, as well as some environmental & infrastructure projects. The Company has a bonding agreement (the “Zurich Bonding Agreement”) with Zurich American Insurance Company (“Zurich”) under which the Company can obtain performance, bid and payment bonds. In April 2015, we entered into additional bonding agreements with ACE Holdings, Inc., Argonaut Insurance Company, Berkley Insurance Company, and Liberty Mutual Insurance Company (collectively, the “Additional Sureties”). The bonding agreements with the Additional Sureties contain similar terms and conditions as the Zurich Bonding Agreement. The Company also has outstanding bonds with Travelers Casualty and Surety Company of America. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1 million to $10 million. At September 30, 2016, the Company had outstanding performance bonds totaling approximately $1,044.0 million, of which $41.1 million relates to projects from the Company’s historical demolition business. The revenue value remaining in backlog related to these projects totaled approximately $423.0 million.

In connection with the sale of our historical demolition business, the Company was obligated to keep in place the surety bonds on pending demolition projects for the period required under the respective contract for a project.

In January 2011, the Company issued $250 million in aggregate principal amount of its 7.375% senior notes due February 1, 2019. Approximately $180 million of the net proceeds from the original issuance of the senior notes were used to prepay all of the Company’s 7.75% senior subordinated notes due December 2013, including prepayment premiums and accrued and unpaid interest.  In November 2014, the Company issued an additional $25 million in aggregate principal amount of its 7.375% senior notes due February 1, 2019. The proceeds from this issuance were used to repay indebtedness incurred under our senior secured revolving credit facility in connection with the acquisition of Magnus Pacific Corporation, and for general corporate purposes. The indenture governing the senior notes, among other things, limits the ability of the Company and its restricted subsidiaries to (i) pay dividends, or make certain other restricted payments or investments; (ii) incur additional indebtedness and issue disqualified stock; (iii) create liens on its assets; (iv) transfer and sell assets; (v) merge, consolidate or sell all or substantially all of its assets; (vi) enter into certain transactions with affiliates; (vii) create restrictions on dividends or other payments by its restricted subsidiaries and (viii) create guarantees of indebtedness by restricted subsidiaries. These covenants are subject to a number of important limitations and exceptions that are described in the indenture governing the senior notes.

The impact of changes in functional currency exchange rates against the U.S. dollar on non-U.S. dollar cash balances, primarily the Brazilian Real and Australian Dollar, is reflected in the cumulative translation adjustment—net within accumulated other comprehensive loss. Cash held in non-U.S. dollar currencies primarily is used for project-related and other operating costs in those currencies reducing the Company’s exposure to future realized exchange gains and losses.

38

The Company believes its cash and cash equivalents, its anticipated cash flows from operations and availability under its revolving credit facility will be sufficient to fund the Company’s operations, capital expenditures, and the scheduled debt service requirements for the next twelve months. Beyond the next twelve months, the Company’s ability to fund its working capital needs, planned capital expenditures, scheduled debt payments and dividends, if any, and to comply with all the financial covenants under the Credit Agreement and bonding agreement, depends on its future operating performance and cash flows, which in turn, are subject to prevailing economic conditions and to financial, business and other factors, some of which are beyond the Company’s control.

Critical accounting policies and estimates

In preparing its consolidated financial statements, the Company follows GAAP, which is described in Note 1 to the Company’s December 31, 2015 Consolidated Financial Statements included on Form 10-K. The application of these principles requires significant judgments or an estimation process that can affect the results of operations, financial position and cash flows of the Company, as well as the related footnote disclosures. The Company continually reviews its accounting policies and financial information disclosures. There have been no material changes in the Company’s critical accounting policies or estimates since December 31, 2015.

Item 3. Quantitative and Qualitative Disclosures about Market Risk.

The market risk of the Company’s financial instruments as of September 30, 2016 has not materially changed since December 31, 2015. The market risk profile of the Company on December 31, 2015 is disclosed in Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” of the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

Item 4. Controls and Procedures.

a) Evaluation of disclosure controls and procedures.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures, as required by Rule 13a-15(b) and 15d-15(b) under the Securities Exchange Act of 1934 (the “Exchange Act”) as of September 30, 2016. Our disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports that we file or submit under the Exchange Act a) is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding disclosure and b) is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

Our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective in providing such a reasonable assurance.

b) Changes in internal control over financial reporting.

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended September 30, 2016 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

39

PART II — Other Information

Item 1. Legal Proceedings.

See Note 9 “Commitments and Contingencies” in the Notes to Condensed Consolidated Financial Statements.

We have reached a settlement with the Environmental Protection Agency (“EPA”) relating to a project we performed at the Mayport Naval Station from 2010-2012. The EPA is alleging violations of the Marine Protection, Research, and Sanctuaries Act (“MPRSA”). We have agreed with the EPA to settle the matter by paying a penalty of $450,000, without any admission of liability. The proposed penalty will not have a material effect on the Company’s operations, cash flows or financial condition.

Item 1A. Risk Factors.

In Item 1A. “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, we included a risk factor relating to risks associated with our then-pending review of strategic alternatives by our Board of Directors. As disclosed in our Current Report on Form 8-K filed on August 4, 2016, that review has now been concluded after a thorough and comprehensive review.  As a result of such announcement, the market price and trading volume of our stock may fluctuate significantly.  

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

On September 11, 2015, the Company announced a share repurchase program approved by the Board of Directors of the Company, authorizing, but not obligating, the repurchase of up to an aggregate amount of $15,000,000 of its common stock from time to time through December 31, 2016. No repurchases were made in the third quarter of 2016. As of September 30, 2016, the approximate dollar value of shares still available for repurchase under the authorization was $13,575,000.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information

None.

40

Item 6. Exhibits

10.1	Amendment to the Share Purchase Agreement, dated as of September 8, 2016, by and among Magnus Pacific Corporation, now known as Great Lakes Environmental and Infrastructure, LLC and Great Lakes Environmental and Infrastructure Solutions, LLC. #
31.1	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
31.2	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
101.INS	XBRL Instance Document. *
101.SCH	XBRL Taxonomy Extension Schema. *
101.CAL	XBRL Taxonomy Extension Calculation Linkbase. *
101.DEF	XBRL Taxonomy Extension Definition Linkbase. *
101.LAB	XBRL Taxonomy Extension Label Linkbase. *
101.PRE	XBRL Taxonomy Extension Presentation Linkbase. *
*    Filed herewith
#    Portions of this exhibit have been omitted pending a determination by the Securities and Exchange Commission as to whether these portions should be granted confidential treatment.

41

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Great Lakes Dredge & Dock Corporation
(registrant)
By:	/s/  Mark W. Marinko
	Mark W. Marinko
	Senior Vice President and Chief Financial Officer
	(Principal Financial and Accounting Officer and Duly Authorized Officer)

Date:  November 2, 2016

42

EXHIBIT INDEX

Number	Document Description
10.1	Amendment to the Share Purchase Agreement, dated as of September 8, 2016, by and among Magnus Pacific Corporation, now known as Great Lakes Environmental and Infrastructure, LLC and Great Lakes Environmental and Infrastructure Solutions, LLC. #
31.1	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
31.2	Certification Pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *
32.1	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
32.2	Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *
101.INS	XBRL Instance Document. *
101.SCH	XBRL Taxonomy Extension Schema. *
101.CAL	XBRL Taxonomy Extension Calculation Linkbase. *
101.DEF	XBRL Taxonomy Extension Definition Linkbase. *
101.LAB	XBRL Taxonomy Extension Label Linkbase. *
101.PRE	XBRL Taxonomy Extension Presentation Linkbase. *
*    Filed herewith
#    Portions of this exhibit have been omitted pending a determination by the Securities and Exchange Commission as to whether these portions should be granted confidential treatment.

43

EX-10.1

PORTIONS OF THIS EXHIBIT HAVE BEEN REDACTED PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT UNDER RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. INFORMATION FOR WHICH CONFIDENTIAL TREATMENT HAS BEEN REQUESTED IS OMITTED, MARKED WITH “[*]” AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.

Exhibit 10.1

EXECUTION VERSION

Amendment To The Share Purchase Agreement

This Amendment, made and entered into on September 8, 2016 is to the Share Purchase Agreement dated November 4, 2014 (the “Agreement”) which was entered into by and between Magnus Pacific Corporation, now known as Great Lakes Environmental and Infrastructure, LLC (the “Company”) and Great Lakes Environmental and Infrastructure Solutions, LLC (the “Purchaser”).

Recitals

WHEREAS, the Parties have agreed to modify the Agreement pursuant to the terms of this Amendment; and

WHEREAS, the terms of this Amendment shall modify the related terms in the Agreement.

NOW THEREFORE, in consideration of the obligations herein made and undertaken, the Parties, intending to be legally bound, covenant and agree as follows:

1. Section 1.05 of the Agreement is amended as follows:

The first sentence is deleted in its entirety and replaced with the following, “For purposes of this Section 1.05, all EBITDA calculations shall be based on the Business and shall be calculated in accordance with Schedule B attached hereto.”

The last sentence of Section 1.05(a) of the Agreement is deleted in its entirety and replaced with the following, “References to “EBITDA of Purchaser” shall mean the EBITDA from the Business and shall be calculated in accordance with Schedule B attached hereto.”

Section 1.05(b) is deleted in its entirety and replaced with the following, “Any amounts received by Sellers pursuant to (a) above will be adjusted based on the value of the 2017-2019 average EBITDA of Purchaser as of December 31, 2019 (the “2019 EBITDA of Purchaser”).  Seller shall receive the full value of the Earnout Payment provided that the 2019 EBITDA of Purchaser meets or exceeds [*]Dollars ($[*]) (the “2019 EBITDA Target”).  In the event the 2019 EBITDA of Purchaser does not meet the 2019 EBITDA Target, the Earnout Payment shall be reduced in the amount proportional to the amount by which the 2019 EBITDA of Purchaser was below the 2019 EBITDA Target; provided, however, there is no Earnout Payment if the 2019 EBITDA Target is below [*] Dollars ($[*]).

2. For the purpose of interpreting the modifications to Section 1.05 as made above, Schedule B of the Agreement and Schedule 1 of the Note are amended, with regards to Section 1.05 only, as follows:

Page 1 of 2

PORTIONS OF THIS EXHIBIT HAVE BEEN REDACTED PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT UNDER RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. INFORMATION FOR WHICH CONFIDENTIAL TREATMENT HAS BEEN REQUESTED IS OMITTED, MARKED WITH “[*]” AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.

The third sentence of the first paragraph is deleted in its entirety and replaced with the following, “The applicable Earnout Period for Section 1.05 of the Agreement shall be calendar years 2017-2019.”

The definition of EBITDA of Purchaser is deleted and replaced with the following, “shall mean an amount equal to the sum of: (i) the EBITDA of Company for the respective time period as calculated in accordance with the provisions set forth above, and (ii) the EBITDA for the respective time period of (a) the business of Company if such business is operated by a separate entity or party of a separate entity and (b) adjusted to reflect the impact of a Business Addition and related Investor Return, as set out above.”

3. Words not defined in this Amendment shall have the same meaning as ascribed to them in the Agreement.

4. Other than as specifically modified by the terms of this Amendment, all other terms of the Agreement shall remain unmodified and in full force and effect.

IN WITNESS WHEREOF, the Parties hereto execute this Amendment as of the date first written above.

Great Lakes Environmental and [GLEI]

Infrastructure Solutions, LLC

By:_/s/Jonathan W. Berger__________By:_/s/ Louay Owaidat_____________

Jonathan W. BergerLouay Owaidat

ManagerSeller Representative, as

authorized pursuant to Section

10.16(c) of the Agreement

Page 2 of 2

EX-31.1

Exhibit 31.1

CERTIFICATIONS PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, Jonathan W. Berger, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Great Lakes Dredge & Dock Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2016

/s/ Jonathan W. Berger

Jonathan W. Berger

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

CERTIFICATION

I, Mark W. Marinko, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Great Lakes Dredge & Dock Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2016

/s/ Mark W. Marinko

Mark W. Marinko

Senior Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Great Lakes Dredge & Dock Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jonathan W. Berger, Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Great Lakes Dredge & Dock Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

/s/ Jonathan W. Berger

Jonathan W. Berger

Chief Executive Officer

Date: November 2, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Great Lakes Dredge & Dock Corporation and will be retained by Great Lakes Dredge & Dock Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Great Lakes Dredge & Dock Corporation (the “Company”) on Form 10-Q for the period ended September 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark W. Marinko, Senior Vice President and Chief Financial Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Great Lakes Dredge & Dock Corporation for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

/s/ Mark W. Marinko

Mark W. Marinko

Senior Vice President and Chief Financial Officer

Date: November 2, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Great Lakes Dredge & Dock Corporation and will be retained by Great Lakes Dredge & Dock Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 28, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Trading Symbol	GLDD
Entity Registrant Name	Great Lakes Dredge & Dock CORP
Entity Central Index Key	0001372020
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		60,940,829

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 13,595	$ 14,184
Accounts receivable—net	115,753	130,777
Contract revenues in excess of billings	75,843	81,195
Inventories	35,734	35,963
Prepaid expenses and other current assets	78,341	67,614
Total current assets	319,266	329,733
PROPERTY AND EQUIPMENT—Net	436,691	430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net	85,314	86,004
INVENTORIES—Noncurrent	48,706	41,646
INVESTMENTS IN JOINT VENTURES	5,791	3,761
OTHER	8,366	6,770
TOTAL	904,134	898,124
CURRENT LIABILITIES:
Accounts payable	109,255	118,846
Accrued expenses	57,365	72,277
Billings in excess of contract revenues	9,677	7,061
Revolving credit facility	60,000
Current portion of long term debt	11,745	7,506
Total current liabilities	248,042	205,690
7 3/8% SENIOR NOTES	272,748	271,998
REVOLVING CREDIT FACILITY		20,000
NOTES PAYABLE	45,012	53,792
DEFERRED INCOME TAXES	73,753	74,006
OTHER	10,002	20,465
Total liabilities	649,557	645,951
COMMITMENTS AND CONTINGENCIES (Note 9)
EQUITY:
Common stock—$.0001 par value; 90,000 authorized, 61,215 and 60,709 shares issued; 60,937 and 60,431 shares outstanding at September 30, 2016 and December 31, 2015, respectively.	6	6
Treasury stock, at cost	(1,433)	(1,433)
Additional paid-in capital	286,266	283,247
Accumulated deficit	(28,858)	(27,664)
Accumulated other comprehensive loss	(1,404)	(1,983)
Total equity	254,577	252,173
TOTAL	$ 904,134	$ 898,124

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	61,215,000	60,709,000
Common stock, shares outstanding	60,937,000	60,431,000

XML

Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Contract revenues	$ 198,869	$ 220,802	$ 554,180	$ 634,236
Costs of contract revenues	178,824	196,717	489,889	567,182
Gross profit	20,045	24,085	64,291	67,054
General and administrative expenses	7,187	15,277	47,027	48,768
Impairment of goodwill				2,750
(Gain) loss on sale of assets—net	(2)	(884)	675	(887)
Operating income	12,860	9,692	16,589	16,423
Interest expense—net	(4,819)	(7,293)	(16,443)	(18,490)
Equity in earnings (loss) of joint ventures	6	(2,051)	19	(5,765)
Other income (expense)	(637)	706	(1,918)	(353)
Income (loss) before income taxes	7,410	1,054	(1,753)	(8,185)
Income tax (provision) benefit	(2,850)	(742)	559	2,831
Net income (loss)	$ 4,560	$ 312	$ (1,194)	$ (5,354)
Basic earnings (loss) per share	$ 0.08		$ (0.02)	$ (0.09)
Basic weighted average shares	60,811	60,496	60,676	60,411
Diluted earnings (loss) per share	$ 0.08		$ (0.02)	$ (0.09)
Diluted weighted average shares	61,526	60,841	60,676	60,411

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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)		$ 4,560	$ 312	$ (1,194)	$ (5,354)
Currency translation adjustment-net of tax	[1]	39	(639)	596	(1,394)
Net unrealized gain on derivatives—net of tax	[2]	(17)		(17)
Other comprehensive income (loss)—net of tax		22	(639)	579	(1,394)
Comprehensive income (loss)		$ 4,582	$ (327)	$ (615)	$ (6,748)

[1] Net of income tax (provision) benefit of $(25) and $422 for the three months ended September 30, 2016 and 2015, respectively and $(395) and $922 for the nine months ended September 30, 2016 and 2015, respectively.

[2] Net of income tax benefit of $11 for the three and nine months ended September 30, 2016, respectively.

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Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Currency translation adjustment, tax	$ (25)	$ 422	$ (395)	$ 922
Net unrealized (gain) loss on derivatives-net of tax	$ 11		$ 11

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Condensed Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
BALANCE - value at Dec. 31, 2014	$ 255,963	$ 6		$ 278,166	$ (21,475)	$ (734)
BALANCE - shares at Dec. 31, 2014		60,170
Share-based compensation, Value	2,897			2,897
Share-based compensation, Shares		93
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(265)			(265)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		98
Exercise of options and purchases from employee stock plans, Value	1,356			1,356
Exercise of options and purchases from employee stock plans, Shares		160
Excess income tax benefit from share-based compensation	(13)			(13)
Purchase of treasury stock, value	(1,107)		$ (1,107)
Purchase of treasury stock, shares			(213)
Net loss	(5,354)				(5,354)
Other comprehensive income—net of tax	(1,394)					(1,394)
BALANCE - value at Sep. 30, 2015	252,083	$ 6	$ (1,107)	282,141	(26,829)	(2,128)
BALANCE - shares at Sep. 30, 2015		60,521	(213)
BALANCE - value at Dec. 31, 2015	252,173	$ 6	$ (1,433)	283,247	(27,664)	(1,983)
BALANCE - shares at Dec. 31, 2015		60,709	(278)
Share-based compensation, Value	2,276			2,276
Share-based compensation, Shares		126
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(162)			(162)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares		71
Exercise of options and purchases from employee stock plans, Value	905			905
Exercise of options and purchases from employee stock plans, Shares		309
Net loss	(1,194)				(1,194)
Other comprehensive income—net of tax	579					579
BALANCE - value at Sep. 30, 2016	$ 254,577	$ 6	$ (1,433)	$ 286,266	$ (28,858)	$ (1,404)
BALANCE - shares at Sep. 30, 2016		61,215	(278)

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Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES:
Net loss	$ (1,194)	$ (5,354)
Adjustments to reconcile net loss to net cash flows provided by (used in) operating activities:
Depreciation and amortization	45,692	47,747
Equity in earnings of joint ventures	(6,313)	(3,402)
Cash distributions from joint ventures	3,234	2,500
Deferred income taxes	152	(3,031)
(Gain) loss on sale of assets—net	675	(887)
Impairment of goodwill		2,750
Gain on adjustment of contingent consideration	(8,940)	(8,444)
Amortization of deferred financing fees	1,879	2,126
Unrealized net gain from mark-to-market valuations of derivatives	(5,285)	(1,479)
Unrealized foreign currency gain	(213)	(1,076)
Share-based compensation expense	2,276	2,897
Excess income tax benefit from share-based compensation		13
Changes in assets and liabilities:
Accounts receivable	14,163	(31,819)
Contract revenues in excess of billings	5,712	14,328
Inventories	(6,831)	(3,761)
Prepaid expenses and other current assets	(6,839)	(6,727)
Accounts payable and accrued expenses	(26,317)	(9,896)
Billings in excess of contract revenues	2,593	1,657
Other noncurrent assets and liabilities	(1,466)	(2,039)
Cash provided by (used in) operating activities	12,978	(3,897)
INVESTING ACTIVITIES:
Purchases of property and equipment	(58,842)	(53,394)
Proceeds from dispositions of property and equipment	10,455	1,167
Net cash flows used in investing activities	(48,387)	(52,227)
FINANCING ACTIVITIES:
Deferred financing fees	(332)	(29)
Repayments of long term note payable	(803)	(488)
Taxes paid on settlement of vested share awards	(162)	(265)
Repayments of term loan facility	(3,750)	(3,750)
Repayments of equipment debt	(1,064)	(853)
Proceeds from equipment debt		410
Exercise of options and purchases from employee stock plans	905	1,356
Excess income tax benefit from share-based compensation		(13)
Treasury stock		(1,107)
Borrowings under revolving loans	133,000	146,000
Repayments of revolving loans	(93,000)	(118,000)
Net cash provided by financing activities	34,794	23,261
Effect of foreign currency exchange rates on cash and cash equivalents	26	(105)
Net decrease in cash and cash equivalents	(589)	(32,968)
Cash and cash equivalents at beginning of period	14,184	42,389
Cash and cash equivalents at end of period	13,595	9,421
Supplemental Cash Flow Information
Cash paid for interest	23,846	23,645
Cash paid (refunded) for income taxes	(226)	987
Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	$ 14,511	4,981
Property and equipment purchased on capital leases and equipment notes		2,190
Property and equipment purchased on notes payable		$ 15,569

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Basis Of Presentation Policies

9 Months Ended

Sep. 30, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Basis Of Presentation

1. Basis of presentation

The unaudited condensed consolidated financial statements and notes herein should be read in conjunction with the audited consolidated financial statements of Great Lakes Dredge & Dock Corporation and Subsidiaries (the “Company” or “Great Lakes”) and the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015. The condensed consolidated financial statements included herein have been prepared by the Company without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the SEC’s rules and regulations, although management believes that the disclosures are adequate and make the information presented not misleading. In the opinion of management, all adjustments, which are of a normal and recurring nature (except as otherwise noted), that are necessary to present fairly the Company’s financial position as of September 30, 2016, and its results of operations for the three and nine months ended September 30, 2016 and 2015 and cash flows for the nine months ended September 30, 2016 and 2015 have been included.

The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel, supplies, short-term rentals and project overhead. Hourly labor is generally hired on a project-by-project basis. Costs of contract revenues vary significantly depending on the type and location of work performed and assets utilized.

The Company’s cost structure includes significant annual equipment-related costs, including depreciation, maintenance, insurance and long-term rentals. These costs have averaged approximately 21% of total costs of contract revenues over the prior three years. During the year, both equipment utilization and the timing of fixed cost expenditures fluctuate significantly. Accordingly, the Company allocates these fixed equipment costs to interim periods in proportion to revenues recognized over the year, to better match revenues and expenses. Specifically, at each interim reporting date the Company compares actual revenues earned to date on its dredging contracts to expected annual revenues and recognizes equipment costs on the same proportionate basis. In the fourth quarter, any over or under allocated equipment costs are recognized such that the expense for the year equals actual equipment costs incurred during the year.

The Company has two operating segments: dredging and environmental & infrastructure, previously referred to as environmental & remediation, which are also the Company’s two reportable segments. The Company has determined that dredging, Terra Contracting Services, LLC (“Terra”) and Great Lakes Environmental & Infrastructure, LLC (“GLEI”) are the Company’s three reporting units.

The Company performed its most recent annual test of impairment as of July 1, 2016 with no indication of impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2017. Due to a decline in the overall financial performance and declining cash flows in the Terra reporting unit, the Company concluded there was a triggering event that required an interim impairment test for the reporting unit in the second quarter of 2015 and recorded a goodwill impairment charge of $2,750 during the quarter ended June 30, 2015. This impairment of goodwill is discussed in Note 6.

The condensed consolidated results of operations and comprehensive income for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

Recent Accounting Pronouncements

In August 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update No. 2016-15 (“ASU 2016-15”), Classification of Certain Cash Receipts and Cash Payments which amends FASB’s standards for reporting cash flows in general-purpose financial statements. The amendments address the diversity in practice related to the classification of certain cash receipts and payments.  The guidance is effective for fiscal years beginning after December 15, 2017.  The Company is currently evaluating the impact of ASU 2016-15 on its consolidated financial statements.

In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“ASU 2016-09”), Compensation – Stock Compensation (Topic 718). ASU 2016-09 identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-09 on its consolidated financial statements.

In February 2016, the FASB issued Accounting Standard Update No. 2016-02 (“ASU 2016-02”), Leases (Topic 842). The Board issued this update to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-02 on its financial statements.

In November 2015, the FASB issued Accounting Standard Update No. 2015-17 (“ASU 2015-17”), Income Taxes: Balance Sheet Classifications of Deferred Taxes (Topic 740) which simplifies the presentation of deferred income taxes by requiring that deferred tax liabilities and assets be classified as noncurrent in the balance sheet. The update is effective for public companies for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The guidance may be adopted prospectively or retrospectively and early adoption is permitted. As of December 31, 2015, the Company elected to early adopt this ASU 2015-17 on a prospective basis and therefore, prior years were not retrospectively adjusted.

In April 2015, the FASB issued Accounting Standard Update No. 2015-03 (“ASU 2015-03”), Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This update is effective for fiscal years beginning after December 15, 2015, and is required to be applied retrospectively. The Company adopted this standard in the first quarter of 2016 on a retrospective basis. As a result, the Company presented $3,502 of unamortized debt issuance costs that had been included in other assets in the consolidated balance sheet as of December 31, 2015 as direct deductions from the carrying amounts of the related debt liabilities.

In May 2014, the FASB issued Accounting Standard Update No. 2014-09 (“ASU 2014-09”), Revenue from Contracts with Customers (Topic 606), which supersedes the existing revenue recognition requirements. ASU 2014-09 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 has been deferred to be effective for fiscal years beginning after December 15, 2017, including interim periods within that reporting period, which will be its first quarter of fiscal 2018. Although early adoption is permitted in fiscal 2017, the Company expects to adopt ASU 2014-09 in first quarter of 2018. The Company is currently evaluating the impact of ASU 2014-09 on its consolidated financial statements.

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Earnings Per Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share

2. Earnings per share

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings per share is computed similarly to basic earnings per share except that it reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock. For the nine months ended September 30, 2016 and 2015, the dilutive effect of 576 thousand and 462 thousand stock options and restricted stock units, respectively, were excluded from the diluted weighted-average common shares outstanding as the Company incurred a loss during these periods. For the three and nine months ended September 30, 2016, 1,594 thousand and 1,603 thousand stock options and restricted stock units were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method, as such stock options and restricted stock units were determined to be anti-dilutive. Similarly, for the three months ended September 30, 2015, 1,170 thousand stock options and restricted stock units were excluded from the calculation of diluted earnings per share based on the application of the treasury stock method.

The computations for basic and diluted earnings (loss) per share are as follows:

	Three Months Ended				Nine Months Ended
(shares in thousands)	September 30,				September 30,
	2016		2015		2016			2015
Net income (loss)	$	4,560	$	312	$	(1,194	)	$	(5,354	)
Weighted-average common shares outstanding — basic		60,811		60,496		60,676			60,411
Effect of stock options and restricted stock units		715		345		—			—
Weighted-average common shares outstanding — diluted		61,526		60,841		60,676			60,411
Earnings (loss) per share —basic	$	0.08	$	—	$	(0.02	)	$	(0.09	)
Earnings (loss) per share — diluted	$	0.08	$	—	$	(0.02	)	$	(0.09	)

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Accounts Receivable And Contracts In Progress

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Accounts receivable and contracts in progress

3. Accounts receivable and contracts in progress

Accounts receivable at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Completed contracts	$	12,379		$	37,111
Contracts in progress		87,965			70,787
Retainage		20,340			27,203
		120,684			135,101
Allowance for doubtful accounts		(469	)		(754	)
Total accounts receivable—net	$	120,215		$	134,347
Current portion of accounts receivable—net	$	115,753		$	130,777
Long-term accounts receivable and retainage		4,462			3,570
Total accounts receivable—net	$	120,215		$	134,347

The components of contracts in progress at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	404,541		$	230,159
Amounts billed		(351,754	)		(176,283	)
Costs and earnings in excess of billings for contracts in progress		52,787			53,876
Costs and earnings in excess of billings for completed contracts		23,056			27,319
Total contract revenues in excess of billings	$	75,843		$	81,195
Billings in excess of costs and earnings:
Amounts billed	$	(270,274	)	$	(207,550	)
Costs and earnings for contracts in progress		260,597			200,489
Total billings in excess of contract revenues	$	(9,677	)	$	(7,061	)

The Company has $17,910 included in costs in excess of billings that are dependent upon the sale of environmental credits earned for a wetland mitigation project. The sale of these credits is subject to market factors that could cause the amount of expected revenue to be higher or lower than currently estimated. If the amount of proceeds received from the sale of the environmental credits is lower than our expectations, we could sustain a loss of part or all of the costs incurred related to this project. Additionally, the timing of realization may be impacted by the timing of a delay in the sale of these environmental credits, resulting in a longer period to recover our investment.

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Accrued Expenses

9 Months Ended

Sep. 30, 2016

Payables And Accruals [Abstract]

Accrued Expenses

4. Accrued expenses

Accrued expenses at September 30, 2016 and December 31, 2015 are as follows:

	September 30,		December 31,
	2016		2015
Insurance	$	15,962	$	16,291
Accumulated deficit in joint ventures		14,359		15,408
Payroll and employee benefits		7,282		13,317
Income and other taxes		4,341		3,726
Interest		4,014		8,743
Percentage of completion adjustment		2,876		2,837
Fuel hedge contracts		—		4,388
Other		8,531		7,567
Total accrued expenses	$	57,365	$	72,277

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Long-term Debt

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Long-Term Debt

5. Long-term debt

Credit Agreement

On June 4, 2012, the Company entered into a senior revolving credit agreement, as subsequently amended, (the “Credit Agreement”) with certain financial institutions from time to time party thereto as lenders, Wells Fargo Bank, National Association, as Administrative Agent, Swingline Lender and an Issuing Lender, Bank of America, N.A., as Syndication Agent and PNC Bank, National Association, BMO Harris Bank N.A. and Fifth Third Bank, as Co-Documentation Agents. The Credit Agreement provides for a senior revolving credit facility in an aggregate principal amount of up to $199,000, multicurrency borrowings up to a $50,000 sublimit and swingline loans up to a $10,000 sublimit. The Credit Agreement also includes an incremental loans feature that will allow the Company to increase the senior revolving credit facility by an aggregate principal amount of up to $15,000. This feature is subject to lenders providing incremental commitments for such increase, provided that no default or event of default exists, and the Company being in pro forma compliance with the existing financial covenants, both before and after giving effect to the increase, and subject to other standard conditions. The Credit Agreement is collateralized by a substantial portion of the Company’s operating equipment with a net book value at September 30, 2016 of $132,178.

The Company’s Credit Agreement matures on June 2, 2017 and the Company is in discussions with lenders to finalize a successor credit facility with substantially similar terms as the current Credit Agreement.

On June 24, 2016, the Company entered into the seventh amendment to the Credit Agreement which modified the Credit Agreement to allow for the sale of the vessel known as the Reem Island and provided for the collateral release to effect the sale. The reduction in the collateral pool resulted in a reduction in the size of the Credit Facility, from $210,000 to $199,000. In addition, the net cash proceeds of the sale of the Reem Island, $10,000, were applied to the revolving loans outstanding.

On June 30, 2016 the Company entered into the eighth amendment (the “Eighth Amendment”) to the Credit Agreement which increased the margin applicable to interest rates, letters of credit and commitment fees thereunder. Depending on the Company’s consolidated total leverage ratio (as defined in the Credit Agreement and further described below), borrowings under the revolving credit facility will bear interest at the option of the Company at either the LIBOR rate plus a margin between 1.50% and 3.50% or a base rate plus a margin between 0.50% and 2.50%.

In addition, the Eighth Amendment modifies the consolidated total leverage covenant contained in the Credit Agreement and adds a maximum capital expenditures covenant. The Company may not permit the consolidated total leverage ratio to be greater than (i) 5.00 to 1.00 for the fiscal quarter ending June 30, 2016, (ii) 4.75 to 1.00 for the fiscal quarter ending September 30, 2016 and (iii) 4.50 to 1.00 for any fiscal quarter ending thereafter. Further, the Company and its subsidiaries may not allow its aggregate capital expenditures to exceed (i) $105,000 for the fiscal year ending December 31, 2016 and (ii) $45,000 during any fiscal year thereafter.

Last, the Eighth Amendment requires the Company and its subsidiaries party to the Credit Agreement to pledge their respective inventory as security for the revolving credit facility.

The Credit Agreement contains affirmative, negative and financial covenants customary for financings of this type. The Credit Agreement also contains customary events of default (including non-payment of principal or interest on any material debt and breaches of covenants) as well as events of default relating to certain actions by the Company’s surety bonding provider. The Credit Agreement requires the Company to maintain a minimum fixed charge coverage ratio of 1.25 to 1.00.

The obligations of Great Lakes under the Credit Agreement are unconditionally guaranteed, on a joint and several basis, by each existing and subsequently acquired or formed material direct and indirect domestic subsidiary of the Company. During a year, the Company frequently borrows and repays amounts under its revolving credit facility. As of September 30, 2016, the Company had $60,000 of borrowings on the revolver and $68,893 of letters of credit outstanding, resulting in $70,107 of availability under the Credit Agreement. At September 30, 2016, the Company was in compliance with its various financial covenants under the Credit Agreement.

Term loan facility

On November 4, 2014, the Company entered into a senior secured term loan facility consisting of a term loan in an aggregate principal amount of $50,000 (the “Term Loan Facility”) pursuant to a Loan and Security Agreement, as subsequently amended, (the “Loan Agreement”) by and among the lenders party thereto from time to time and Bank of America, N.A., as administrative agent. The Company borrowed an aggregate principal amount of $47,360 in 2014 and an additional $2,640 in 2015. The proceeds from the Term Loan Facility will be used for the working capital and general corporate purposes of the Company, including to repay borrowings under the Credit Agreement made to finance the construction of the Company’s dual mode articulated tug/barge trailing suction hopper dredge (the “ATB”).

The Term Loan Facility has a term of 5 years. The borrowings under the Term Loan Facility bear interest at a fixed rate of 4.655% per annum. If an event of default occurs under the Loan Agreement, the interest rate will increase by 2.00% per annum during the continuance of such event of default.

The Term Loan Facility provides for monthly amortization payments, payable in arrears, which commenced on December 4, 2014, at an annual amount of (i) approximately 10% of the principal amount of the Term Loan Facility during the first two years of the term, (ii) approximately 20% of the principal amount of the Term Loan Facility during the third and fourth years of the term, and (iii) approximately 25% of the principal amount of the Term Loan Facility during the final year of the term, with the remainder due on the maturity date of the facility. In addition, the Company has usual and customary mandatory prepayment provisions and may optionally prepay the Term Loan Facility in whole or in part at any time, subject to a minimum prepayment amount.

The Loan Agreement includes representations, affirmative and negative covenants and events of default customary for financings of this type and includes the same financial covenants that are currently set forth in the Credit Agreement. The Term Loan Facility is collateralized by a portion of the Company’s operating equipment with a net book value at September 30, 2016 of $47,975.

Senior notes

The Company has outstanding $275,000 of 7.375% senior notes due February 2019. There is an optional redemption on all notes. The redemption prices are 103.7% in 2015, 101.8% in 2016 and 100% in any year following, until the notes mature in 2019.  Interest is paid semi-annually and principal is due at maturity.

Other

The Company enters into note arrangements to finance certain vessels and ancillary equipment.  During the first quarter of 2015, the Company financed the $15,569 acquisition of a vessel previously under an operating lease with a note bearing interest at 5.75% to maturity in 2023.  The current portion of all equipment notes is $2,442. The long term portion is $15,275 and is included in notes payable or other long term liabilities.

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Impairment Of Goodwill

9 Months Ended

Sep. 30, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Impairment Of Goodwill

6. Impairment of goodwill

The Company performed its most recent annual test of impairment as of July 1, 2016 with no indication of impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2017.

Due to a decline in the overall financial performance and declining cash flows in the Terra reporting unit, the Company concluded there was a triggering event that required an interim impairment test for the reporting unit in the second quarter of 2015.

The Company performed step one of the goodwill impairment test as of June 30, 2015, which compared the fair value of the Terra reporting unit against its carrying amount, including goodwill. In deriving the fair value of the Terra reporting unit, the Company used both a market-based approach and an income-based approach. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated revenue and Adjusted EBITDA from continuing operations. Based on the first step analysis, management concluded that the fair value of the Terra reporting unit was less than its carrying value; therefore, the Company performed step two of the goodwill impairment analysis.  

Step two of the goodwill impairment analysis measures the impairment charge by allocating the reporting unit’s fair value to all of the assets and liabilities of the reporting unit in a hypothetical analysis that calculates implied fair value of goodwill in the same manner as if the reporting unit was being acquired in a business combination. Any excess of the carrying value of the reporting unit’s goodwill over the implied fair value of the reporting unit’s goodwill is recorded as a loss on impairment of goodwill.

Management determined that the Terra reporting unit’s implied fair value of goodwill was below the carrying value as of June 30, 2015. As a result, the Company recorded an impairment charge of $2,750 in the second quarter of 2015.

The change in the carrying value of goodwill for the period ended September 30, 2015 is as follows:

	DredgingSegment		Environmental & InfrastructureSegment			Total
Balance — December 31, 2014	$	76,576	$	9,750		$	86,326
Impairment of goodwill		—		(2,750	)		(2,750	)
BALANCE—September 30, 2015	$	76,576	$	7,000		$	83,576

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Fair Value Measurements

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

7. Fair value measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. A fair value hierarchy has been established by GAAP that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance describes 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; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At times, the Company holds certain derivative contracts that it uses to manage foreign currency risk or commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. The fair values of these financial instruments are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	At September 30, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	869	$	—	$	869	$	—

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	4,388	$	—	$	4,388	$	—

Fuel hedge contracts

The Company is exposed to certain market risks, primarily commodity price risk as it relates to the diesel fuel purchase requirements, which occur in the normal course of business. The Company enters into heating oil commodity swap contracts to hedge the risk that fluctuations in diesel fuel prices will have an adverse impact on cash flows associated with its domestic dredging contracts. The Company’s goal is to hedge approximately 80% of the fuel requirements for work in domestic backlog.

As of September 30, 2016, the Company was party to various swap arrangements to hedge the price of a portion of its diesel fuel purchase requirements for work in its backlog to be performed through June 2017. As of September 30, 2016, there were 8.6 million gallons remaining on these contracts which represent approximately 80% of the Company’s forecasted domestic fuel purchases through June 2017. Under these swap agreements, the Company will pay fixed prices ranging from $1.02 to $1.70 per gallon.

At September 30, 2016 the fair value asset of the fuel hedge contracts was estimated to be $869 and is recorded in prepaid expenses and other current assets. At December 31, 2015, the fair value liability of the fuel hedge contracts was estimated to be $4,388 and is recorded in accrued expenses. For fuel hedge contracts considered to be highly effective, the losses reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the nine months ended September 30, 2016 were $46. The remaining gains and losses included in accumulated other comprehensive loss at September 30, 2016 will be reclassified into earnings over the next nine months, corresponding to the period during which the hedged fuel is expected to be utilized. Changes in the fair value of fuel hedge contracts not considered highly effective are recorded as cost of contract revenues in the Statement of Operations. The fair values of fuel hedges are corroborated using inputs that are readily observable in public markets; therefore, the Company determines fair value of these fuel hedges using Level 2 inputs.

The Company is exposed to counterparty credit risk associated with non-performance of its various derivative instruments. The Company’s risk would be limited to any unrealized gains on current positions. To help mitigate this risk, the Company transacts only with counterparties that are rated as investment grade or higher. In addition, all counterparties are monitored on a continuous basis.

The fair value of the fuel hedge contracts outstanding as of September 30, 2016 and December 31, 2015 is as follows:

		Fair Value at
		September 30,			December 31,
	Balance Sheet Location	2016			2015
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	(28	)	$	—
Derivatives not designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets		897			—
Total asset derivatives		$	869		$	—
Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	—		$	4,388

Assets and liabilities measured at fair value on a nonrecurring basis  

All other nonfinancial assets and liabilities measured at fair value in the financial statements on a nonrecurring basis are subject to fair value measurements and disclosures. Nonfinancial assets and liabilities included in our condensed consolidated balance sheets and measured on a nonrecurring basis consist of goodwill and long-lived assets, including other acquired intangibles. Goodwill and long-lived assets are measured at fair value to test for and measure impairment, if any, at least annually for goodwill or when necessary for both goodwill and long-lived assets.

The Company estimated the fair value of our Terra reporting unit for our goodwill impairment test by using both a market-based approach and an income-based approach. The income approach is dependent on a number of factors, including estimates of future market growth trends, forecasted revenues and expenses based upon historical operating data, appropriate discount rates and other variables. The market approach measures the value of a reporting unit through comparison to comparable companies. Under the market approach, the Company uses the guideline public company method by applying estimated market-based enterprise value multiples to the reporting unit’s estimated revenue and Adjusted EBITDA from continuing operations. The Company analyzed companies that performed similar services or are considered peers.

An impairment of goodwill was recorded in the amount of $2,750 in the second quarter of 2015. The fair value of goodwill was determined using quantitative models that contained significant unobservable inputs. See Note 6.

	FairValue Measurements Using Significant Unobservable Inputs (Level 3)
	2015
Goodwill
Balance at January 1,	$	86,326
Impairment of goodwill		(2,750	)
Balance at December 31,	$	83,576

Accumulated other comprehensive income (loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Cumulative translation adjustments—net of tax	$	39		$	(639	)	$	596		$	(1,394	)
Derivatives:
Reclassification of derivative losses to earnings—net of tax		46			—			46			—
Change in fair value of derivatives—net of tax		(63	)		—			(63	)		—
Net unrealized gain on derivatives—net of tax		(17	)		—			(17	)		—
Total other comprehensive income (loss)	$	22		$	(639	)	$	579		$	(1,394	)

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

		Three Months Ended		Nine Months Ended
		September 30,		September 30,
	Statement of Operations Location	2016		2016
Derivatives:
Fuelhedge contracts	Costs of contract revenues	$	76	$	76
	Income tax benefit		30		30
		$	46	$	46

Other financial instruments

The carrying value of financial instruments included in current assets and current liabilities approximates fair value due to the short-term maturities of these instruments. Based on timing of the cash flows and comparison to current market interest rates, the carrying value of our senior revolving credit agreement approximates fair value. The Term Loan Facility approximates fair value based upon stable market interest rates and Company credit ratings from inception to year end. In January 2011 and again in November 2014, the Company issued a total of $275,000 of 7.375% senior notes due February 1, 2019, which were outstanding at September 30, 2016 (See Note 5). The senior notes are senior unsecured obligations of the Company and its subsidiaries that guarantee the senior notes. The fair value of the senior notes was $269,500 at September 30, 2016, which is a Level 1 fair value measurement as the senior notes value was obtained using quoted prices in active markets. It is impracticable to determine the fair value of outstanding letters of credit or performance, bid and payment bonds due to uncertainties as to the amount and timing of future obligations, if any.

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Share-Based Compensation

9 Months Ended

Sep. 30, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation

8. Share-based compensation

The Company’s 2007 Long-Term Incentive Plan permits the granting of stock options, stock appreciation rights, restricted stock and restricted stock units to its employees and directors for up to 5.8 million shares of common stock.

In March 2016, the Company granted 716 thousand restricted stock units to certain employees pursuant to the plan. In addition, all non-employee directors on the Company’s board of directors are paid a portion of their board-related compensation in stock grants. Compensation cost charged to expense related to share-based compensation arrangements was $270 and $839 for the three months ended September 30, 2016 and 2015, respectively, and $2,276 and $2,897 for the nine months ended September 30, 2016 and 2015, respectively.

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Commitments And Contingencies

9 Months Ended

Sep. 30, 2016

Commitments And Contingencies Disclosure [Abstract]

Commitments And Contingencies

9. Commitments and contingencies

Commercial commitments

Performance and bid bonds are customarily required for dredging and marine construction projects, as well as some environmental & infrastructure projects. The Company has a bonding agreement with Zurich American Insurance Company (“Zurich”) under which the Company can obtain performance, bid and payment bonds (the “Zurich Bonding Agreement”). In April 2015, we entered into additional bonding agreements with ACE Holdings, Inc., Argonaut Insurance Company, Berkley Insurance Company, and Liberty Mutual Insurance Company (collectively, the “Additional Sureties”). The bonding agreements with the Additional Sureties contain similar terms and conditions as the Zurich Bonding Agreement. The Company also has outstanding bonds with Travelers Casualty and Surety Company of America. Bid bonds are generally obtained for a percentage of bid value and amounts outstanding typically range from $1,000 to $10,000. At September 30, 2016, the Company had outstanding performance bonds with a notional amount of approximately $1,043,976, of which $41,082 relates to projects from the Company’s historical demolition business. The revenue value remaining in backlog related to these projects totaled approximately $422,956.

In connection with the sale of our historical demolition business, the Company was obligated to keep in place the surety bonds on pending demolition projects for the period required under the respective contract for a project.

Certain foreign projects performed by the Company have warranty periods, typically spanning no more than one to three years beyond project completion, whereby the Company retains responsibility to maintain the project site to certain specifications during the warranty period. Generally, any potential liability of the Company is mitigated by insurance, shared responsibilities with consortium partners, and/or recourse to owner-provided specifications.

Legal proceedings and other contingencies

As is customary with negotiated contracts and modifications or claims to competitively bid contracts with the federal government, the government has the right to audit the books and records of the Company to ensure compliance with such contracts, modifications, or claims, and the applicable federal laws. The government has the ability to seek a price adjustment based on the results of such audit. Any such audits have not had, and are not expected to have, a material impact on the financial position, operations, or cash flows of the Company.

Various legal actions, claims, assessments and other contingencies arising in the ordinary course of business are pending against the Company and certain of its subsidiaries. These matters are subject to many uncertainties, and it is possible that some of these matters could ultimately be decided, resolved, or settled adversely to the Company. Although the Company is subject to various claims and legal actions that arise in the ordinary course of business, except as described below, the Company is not currently a party to any material legal proceedings or environmental claims. The Company records an accrual when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these proceedings, individually or in the aggregate, would be expected to have a material effect on results of operations, cash flows or financial condition.

On April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC (“Yankee”), which together comprised the Company’s historical demolition business, to a privately owned demolition company. Under the terms of the divestiture, the Company retained certain pre-closing liabilities relating to the disposed business. Certain of these liabilities and a legal action brought by the Company to enforce the buyer’s obligations under the sale agreement are described below.

In 2009, NASDI received a letter stating that the Attorney General for the Commonwealth of Massachusetts is investigating alleged violations of the Massachusetts Solid Waste Act. The Company believes that the Massachusetts Attorney General is investigating waste disposal activities at an allegedly unpermitted disposal site owned by a third party with whom NASDI contracted for the disposal of waste materials in 2007 and 2008. Per the Massachusetts Attorney General’s request, NASDI executed a tolling agreement regarding the matter in 2009 and engaged in further discussions with the Massachusetts Attorney General’s office. On or about February 5, 2016, the parties agreed to a tentative settlement in the amount of $275, without any admission of liability and subject to final documentation. On June 3, 2016, a Consent Judgment was entered as a final judgment in Massachusetts Superior Court to implement that settlement.

On January 14, 2015, the Company and our subsidiary, NASDI Holdings, LLC, brought an action in the Delaware Court of Chancery to enforce the terms of the Company's agreement to sell NASDI and Yankee. Under the terms of the agreement, the Company received cash of $5,309 and retained the right to receive additional proceeds based upon future collections of outstanding accounts receivable and work in process existing at the date of close. The Company seeks specific performance of buyer’s obligation to collect and to remit the additional proceeds, and other related relief. Defendants have filed counterclaims alleging that the Company misrepresented the quality of its contracts and receivables prior to the sale. The Company denies defendants’ allegations and intends to vigorously defend against the counterclaims.

Except as noted above, the Company has not accrued any amounts with respect to the above matters, as the Company does not believe, based on information currently known to it, that a loss relating to these matters is probable, and an estimate of a range of potential losses relating to these matters cannot reasonably be made.

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Investments

9 Months Ended

Sep. 30, 2016

Equity Method Investments And Joint Ventures [Abstract]

Investments

10. Investments

The Company owns 50% of TerraSea Environmental Solutions (“TerraSea”) as a joint venture. TerraSea is engaged in the environmental services business through its ability to remediate contaminated soil and dredged sediment treatment. At September 30, 2016 and December 31, 2015, the Company had net advances to TerraSea of $24,898 and $27,592, respectively, which are recorded in other current assets. The Company has an accumulated deficit in joint ventures, which represents losses recognized to date in excess of our investment in TerraSea, of $14,359 and $14,271 at September 30, 2016 and December 31, 2015, respectively, which is presented in accrued expenses. The Company has commenced the wind down of TerraSea with its joint venture partner. The Company believes its net advances to TerraSea are ultimately recoverable either through the operations of the joint venture or as an obligation of our joint venture partner. The joint venture partner has notified the Company that it disagrees with the amount of net advances to TerraSea. The Company believes that its joint venture partner remains obligated for its share of net advances, and any future advances necessary to complete TerraSea’s remaining project. During July 2015, the Company proposed taking a larger percent of the loss on a TerraSea project. Based on this proposal, the Company accrued $1,506 at June 30, 2015 representing the estimated share of additional losses to be assumed. The joint venture partner and the Company are continuing discussions. If those discussions do not lead to a resolution satisfactory to both parties, the joint venture partner and the Company will go to binding arbitration as stipulated by the TerraSea operating agreement. To the extent that net advances are not fully recoverable, additional losses may result in future periods. The Company and its joint venture partner remained obligated to fund TerraSea through the completion of its remaining project. The remaining TerraSea project was substantially complete at September 30, 2016.

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Business Dispositions

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Business Dispositions

11. Business combinations and dispositions

Discontinued operations

On April 23, 2014, the Company entered into an agreement and completed the sale of NASDI and Yankee, its two former subsidiaries that comprised our historical demolition business.  Under the terms of the agreement, the Company received cash of $5,309 and retained the right to receive additional proceeds based upon future collections of outstanding accounts receivable and work in process existing at the date of close, including recovery of outstanding claims for additional compensation from customers, net of future payments of accounts payable existing at the date of close, including any future payments of obligations associated with outstanding claims.  In the fourth quarter of 2013, the Company recorded a preliminary loss on disposal of assets held for sale in discontinued operations. The loss on disposal is subject to change based on the value of additional proceeds received on the working capital existing at the date of disposition.  The amount and timing of the working capital settlement and the amount and timing of the realization of additional net proceeds may be impacted by the litigation with the buyer of the historical demolition business. However, management believes that the ultimate resolution of these matters will not be material to the Company’s consolidated financial position or results of operations.

Magnus Pacific acquisition

On November 4, 2014, the Company acquired Magnus Pacific Corporation (“Magnus”), a California corporation, for an aggregate purchase price of approximately $40 million. Under the terms of the acquisition, the aggregate purchase price is satisfied by payment of $25,000 paid at closing, the issuance of a promissory note and an earnout payment. In the event Magnus did not achieve minimum earnings before interest, taxes, depreciation and amortization, as adjusted in the 2015 fiscal year, the principal amount of the promissory note would be reduced. Magnus did not reach the minimum EBITDA threshold for 2015 designated in the secured promissory note; therefore, during the second quarter of 2015, the Company reduced the remaining fair value by $7,013 to zero and the corresponding change was reflected in general and administrative expenses.

Under the terms of the acquisition, the maximum potential aggregate earnout (the “Earnout Payment”) will be determined based on the attainment of combined Adjusted EBITDA targets of Magnus and Terra for the year ending December 31, 2019. During the third quarter of 2016, the Company signed an amendment to the Magnus, now referred to as GLEI, share purchase agreement which modified the terms of the Earnout Payment. The Earnout Payment remains at $11,400and will be determined based on the attainment of an average Adjusted EBITDA target of GLEI for the years ending December 31, 2017, December 31, 2018 and December 31, 2019. The Earnout Payment may be paid in cash or shares of the Company’s common stock, at the Company’s option.

The Company remeasures the fair value of the contingent Earnout Payment based on projections of the earnings target for the business. Based on the Company’s projections at September 30, 2016, GLEI is not expected to reach the minimum Adjusted EBITDA threshold designated in the amended share purchase agreement; therefore, during the third quarter of 2016, the Company reduced the remaining fair value of $8,940 to zero and the corresponding change is reflected in general and administrative expenses and interest expense.

Other

During the third quarter of 2016, the Company entered into a definitive agreement (“Services Asset Sale Agreement”) to sell the assets associated with certain services lines of the environmental & infrastructure segment’s business, excluding the assets supporting the remediation service line. The Services Asset Sale Agreement was subject to customary closing conditions and financing approval. Subsequent to the end of the third quarter of 2016, the Company amended the terms of the Services Asset Sale Agreement to exclude certain assets thereby reducing the purchase price and extending the anticipated closing date to December 15, 2016. The Company completed the sale of a portion of these assets which were excluded from the Services Asset Sale Agreement to a separate party subsequent to the end of the third quarter of 2016.

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Segment Information

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Segment Information

12. Segment information

The Company and its subsidiaries currently operate in two reportable segments: dredging and environmental & infrastructure, previously referred to as the environment & remediation segment. The Company’s financial reporting systems present various data for management to run the business, including profit and loss statements prepared according to the segments presented. Management uses operating income to evaluate performance between the two segments. Segment information for the periods presented is provided as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Dredging
Contract revenues	$	154,448		$	162,526		$	453,122		$	506,700
Operating income		5,553			19,598			26,762			45,587
Environmental & infrastructure
Contract revenues	$	44,565		$	60,451		$	103,437		$	131,929
Operating income (loss)		7,307			(9,906	)		(10,173	)		(29,164	)
Intersegment revenues	$	(144	)	$	(2,175	)	$	(2,379	)	$	(4,393	)
Total
Contract revenues	$	198,869		$	220,802		$	554,180		$	634,236
Operating income		12,860			9,692			16,589			16,423

Foreign dredging revenue of $21,139 and $34,331 for the three and nine months ended September 30, 2016, respectively, was attributable to work done in the Middle East. Foreign dredging revenue for the three and nine months ended September 30, 2015 was $38,042 and $127,280, respectively.

The majority of the Company’s long-lived assets are marine vessels and related equipment. At any point in time, the Company may employ certain assets outside of the U.S., as needed, to perform work on the Company’s foreign projects.

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Subsidiary Guarantors

9 Months Ended

Sep. 30, 2016

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

Subsidiary Guarantors

13. Subsidiary guarantors

The Company’s long-term debt at September 30, 2016 includes $275,000 of 7.375% senior notes due February 1, 2019. The Company’s obligations under these senior unsecured notes are guaranteed by the Company’s 100% owned domestic subsidiaries. Such guarantees are full, unconditional and joint and several.

The following supplemental financial information sets forth for the Company’s subsidiary guarantors (on a combined basis), the Company’s non-guarantor subsidiaries (on a combined basis) and Great Lakes Dredge & Dock Corporation, exclusive of its subsidiaries (“GLDD Corporation”):

(i) balance sheets as of September 30, 2016 and December 31, 2015;

(ii) statements of operations and comprehensive income (loss) for the three and nine months ended September 30, 2016 and 2015; and

(iii) statements of cash flows for the nine months ended September 30, 2016 and 2015.

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF SEPTEMBER 30, 2016
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	13,064		$	529	$	2	$	—		$	13,595
Accounts receivable — net		115,335			418		—		—			115,753
Contract revenues in excess of billings		73,765			2,078		—		—			75,843
Inventories		35,734			—		—		—			35,734
Prepaid expenses and other current assets		77,988			185		168		—			78,341
Total current assets		315,886			3,210		170		—			319,266
PROPERTY AND EQUIPMENT—Net		436,684			7		—		—			436,691
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		85,314			—		—		—			85,314
INVENTORIES — Noncurrent		48,706			—		—		—			48,706
INVESTMENTS IN JOINT VENTURES		5,791			—		—		—			5,791
RECEIVABLES FROM AFFILIATES		10,982			6,637		85,327		(102,946	)		—
INVESTMENTS IN SUBSIDIARIES		3,551			—		640,658		(644,209	)		—
OTHER		7,558			1		807		—			8,366
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	108,883		$	372	$	—	$	—		$	109,255
Accrued expenses		52,424			764		4,177		—			57,365
Revolving Credit Facility		—			—		60,000		—			60,000
Billings in excess of contract revenues		9,557			120		—		—			9,677
Current portion of long term debt		1,449			—		10,296		—			11,745
Total current liabilities		172,313			1,256		74,473		—			248,042
7 3/8% SENIOR NOTES		—			—		272,748		—			272,748
NOTES PAYABLE		220			—		44,792		—			45,012
DEFERRED INCOME TAXES		(794	)		—		74,547		—			73,753
PAYABLES TO AFFILIATES		91,359			5,926		5,661		(102,946	)		—
OTHER		9,838			—		164		—			10,002
Total liabilities		272,936			7,182		472,385		(102,946	)		649,557
TOTAL EQUITY		641,536			2,673		254,577		(644,209	)		254,577
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF DECEMBER 31, 2015
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	12,035		$	2,147	$	2	$	—		$	14,184
Accounts receivable — net		129,978			799		—		—			130,777
Contract revenues in excess of billings		79,477			1,718		—		—			81,195
Inventories		35,963			—		—		—			35,963
Prepaid expenses and other current assets		66,919			218		477		—			67,614
Total current assets		324,372			4,882		479		—			329,733
PROPERTY AND EQUIPMENT—Net		430,192			18		—		—			430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		86,004			—		—		—			86,004
INVENTORIES — Noncurrent		41,646			—		—		—			41,646
INVESTMENTS IN JOINT VENTURES		3,761			—		—		—			3,761
RECEIVABLES FROM AFFILIATES		18,326			6,009		70,738		(95,073	)		—
INVESTMENTS IN SUBSIDIARIES		3,706			—		621,984		(625,690	)		—
OTHER		6,702			3		65		—			6,770
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	118,619		$	227	$	—	$	—		$	118,846
Accrued expenses		62,861			509		8,907		—			72,277
Billings in excess of contract revenues		6,964			97		—		—			7,061
Current portion of long term debt		1,424			—		6,082		—			7,506
Total current liabilities		189,868			833		14,989		—			205,690
7 3/8% SENIOR NOTES		—			—		271,998		—			271,998
REVOLVING CREDIT FACILITY		—			—		20,000		—			20,000
NOTE PAYABLE		323			—		53,469		—			53,792
DEFERRED INCOME TAXES		(783	)		—		74,789		—			74,006
PAYABLES TO AFFILIATES		85,859			3,505		5,709		(95,073	)		—
OTHER		20,326			—		139		—			20,465
Total liabilities		295,593			4,338		441,093		(95,073	)		645,951
TOTAL EQUITY		619,116			6,574		252,173		(625,690	)		252,173
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	198,100		$	1,333		$	—		$	(564	)	$	198,869
Costs of contract revenues		(177,032	)		(2,356	)		—			564			(178,824	)
Gross profit		21,068			(1,023	)		—			—			20,045
OPERATING EXPENSES:
General and administrative expenses		7,185			—			2			—			7,187
Gain on sale of assets—net		(2	)		—			—			—			(2	)
Operating income (loss)		13,885			(1,023	)		(2	)		—			12,860
Interest expense—net		896			—			(5,715	)		—			(4,819	)
Equity in earnings (loss) of subsidiaries		(3	)		—			13,041			(13,038	)		—
Equity in earnings of joint ventures		6			—			—			—			6
Other expense		(637	)		—			—			—			(637	)
Income (loss) before income taxes		14,147			(1,023	)		7,324			(13,038	)		7,410
Income tax provision		—			(86	)		(2,764	)		—			(2,850	)
Net income (loss)	$	14,147		$	(1,109	)	$	4,560		$	(13,038	)	$	4,560
Comprehensive income (loss)	$	14,130		$	(1,070	)	$	4,582		$	(13,060	)	$	4,582

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	216,993		$	4,402		$	—		$	(593	)	$	220,802
Costs of contract revenues		(193,955	)		(3,355	)		—			593			(196,717	)
Gross profit		23,038			1,047			—			—			24,085
OPERATING EXPENSES:
General and administrative expenses		15,277			—			—			—			15,277
Gain on sale of assets—net		(884	)		—			—			—			(884	)
Operating income		8,645			1,047			—			—			9,692
Interest expense—net		(90	)		—			(7,203	)		—			(7,293	)
Equity in earnings of subsidiaries		2			—			8,144			(8,146	)		—
Equity in loss of joint ventures		(2,051	)		—			—			—			(2,051	)
Other income		706			—			—			—			706
Income before income taxes		7,212			1,047			941			(8,146	)		1,054
Income tax (provision) benefit		7			(120	)		(629	)		—			(742	)
Net income	$	7,219		$	927		$	312		$	(8,146	)	$	312
Comprehensive income (loss)	$	7,219		$	288		$	(327	)	$	(7,507	)	$	(327	)

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	554,388		$	1,333		$	—		$	(1,541	)	$	554,180
Costs of contract revenues		(486,220	)		(5,210	)		—			1,541			(489,889	)
Gross profit		68,168			(3,877	)		—			—			64,291
OPERATING EXPENSES:
General and administrative expenses		47,076			4			(53	)		—			47,027
Loss on sale of assets—net		675			—			—			—			675
Operating income (loss)		20,417			(3,881	)		53			—			16,589
Interest expense—net		531			—			(16,974	)		—			(16,443	)
Equity in earnings (loss) of subsidiaries		(181	)		—			15,082			(14,901	)		—
Equity in earnings of joint ventures		19			—			—			—			19
Other expense		(1,910	)		(8	)		—			—			(1,918	)
Income (loss) before income taxes		18,876			(3,889	)		(1,839	)		(14,901	)		(1,753	)
Income tax (provision) benefit		—			(86	)		645			—			559
Net income (loss)	$	18,876		$	(3,975	)	$	(1,194	)	$	(14,901	)	$	(1,194	)
Comprehensive income (loss)	$	18,859		$	(3,379	)	$	(615	)	$	(15,480	)	$	(615	)

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	624,498		$	11,912		$	—		$	(2,174	)	$	634,236
Costs of contract revenues		(558,343	)		(11,013	)		—			2,174			(567,182	)
Gross profit		66,155			899			—			—			67,054
OPERATING EXPENSES:
General and administrative expenses		48,768			—			—			—			48,768
Impairment of goodwill		2,750			—			—			—			2,750
Gain on sale of assets—net		(887	)		—			—			—			(887	)
Operating income		15,524			899			—			—			16,423
Interest expense—net		(349	)		—			(18,141	)		—			(18,490	)
Equity in earnings of subsidiaries		6			—			9,663			(9,669	)		—
Equity in loss of joint ventures		(5,765	)		—			—			—			(5,765	)
Other expense		(346	)		(7	)		—			—			(353	)
Income (loss) before income taxes		9,070			892			(8,478	)		(9,669	)		(8,185	)
Income tax (provision) benefit		7			(300	)		3,124			—			2,831
Net income (loss)	$	9,077		$	592		$	(5,354	)	$	(9,669	)	$	(5,354	)
Comprehensive income (loss)	$	9,077		$	(802	)	$	(6,748	)	$	(8,275	)	$	(6,748	)

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Cash provided by (used in) operating activities	$	36,242		$	(3,096	)	$	(20,168	)	$	—		$	12,978
INVESTING ACTIVITIES:
Purchases of property and equipment		(58,842	)		—			—			—			(58,842	)
Proceeds from dispositions of property and equipment		10,455			—			—			—			10,455
Net change in accounts with affiliates		10,505			—			—			(10,505	)		—
Net cash flows used in investing activities		(37,882	)		—			—			(10,505	)		(48,387	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(332	)		—			(332	)
Repayments of long term note payable		—			—			(803	)		—			(803	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayments of equipment debt		(1,064	)		—			—			—			(1,064	)
Net change in accounts with affiliates		26,733			1,452			(38,690	)		10,505			—
Intercompany dividends		(23,000	)		—			23,000			—			—
Exercise of options and purchases from employee stock plans		—			—			905			—			905
Taxes paid on settlement of vested share awards		—			—			(162	)		—			(162	)
Borrowings under revolving loans		—			—			133,000			—			133,000
Repayments of revolving loans		—			—			(93,000	)		—			(93,000	)
Net cash flows provided by financing activities		2,669			1,452			20,168			10,505			34,794
Effect of foreign currency exchange rates on cash and cash equivalents		—			26			—			—			26
Net increase (decrease) in cash and cash equivalents		1,029			(1,618	)		—			—			(589	)
Cash and cash equivalents at beginning of period		12,035			2,147			2			—			14,184
Cash and cash equivalents at end of period	$	13,064		$	529		$	2		$	—		$	13,595

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	$	15,013		$	(1,308	)	$	(17,602	)	$	—		$	(3,897	)
INVESTING ACTIVITIES:
Purchases of property and equipment		(53,394	)		—			—			—			(53,394	)
Proceeds from dispositions of property and equipment		1,167			—			—			—			1,167
Net change in accounts with affiliates		(29,059	)		—			(9,839	)		38,898			—
Net cash flows used in investing activities		(81,286	)		—			(9,839	)		38,898			(52,227	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(29	)		—			(29	)
Repayments of long term note payable		—			—			(488	)		—			(488	)
Taxes paid on settlement of vested share awards		—			—			(265	)		—			(265	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayment of equipment debt		(853	)		—			—			—			(853	)
Proceeds from equipment debt		—			—			410			—			410
Net change in accounts with affiliates		17,416			1,355			20,127			(38,898	)		—
Capital contributions		16,800			—			(16,800	)		—			—
Exercise of options and purchases from employee stock plans		—			—			1,356			—			1,356
Excess income tax benefit from share-based compensation		—			—			(13	)		—			(13	)
Treasury stock		—			—			(1,107	)		—			(1,107	)
Borrowings under revolving loans		—			—			146,000			—			146,000
Repayments of revolving loans		—			—			(118,000	)		—			(118,000	)
Net cash flows provided by financing activities		33,363			1,355			27,441			(38,898	)		23,261
Effect of foreign currency exchange rates on cash and cash equivalents		—			(105	)		—			—			(105	)
Net decrease in cash and cash equivalents		(32,910	)		(58	)		—			—			(32,968	)
Cash and cash equivalents at beginning of period		41,724			663			2			—			42,389
Cash and cash equivalents at end of period	$	8,814		$	605		$	2		$	—		$	9,421

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Basis Of Presentation Policies (Policies)

9 Months Ended

Sep. 30, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In August 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update No. 2016-15 (“ASU 2016-15”), Classification of Certain Cash Receipts and Cash Payments which amends FASB’s standards for reporting cash flows in general-purpose financial statements. The amendments address the diversity in practice related to the classification of certain cash receipts and payments.  The guidance is effective for fiscal years beginning after December 15, 2017.  The Company is currently evaluating the impact of ASU 2016-15 on its consolidated financial statements.

In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“ASU 2016-09”), Compensation – Stock Compensation (Topic 718). ASU 2016-09 identifies areas for simplification involving several aspects of accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur, as well as certain classifications on the statement of cash flows. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-09 on its consolidated financial statements.

In February 2016, the FASB issued Accounting Standard Update No. 2016-02 (“ASU 2016-02”), Leases (Topic 842). The Board issued this update to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those annual periods. The Company is currently evaluating the impact of ASU 2016-02 on its financial statements.

In November 2015, the FASB issued Accounting Standard Update No. 2015-17 (“ASU 2015-17”), Income Taxes: Balance Sheet Classifications of Deferred Taxes (Topic 740) which simplifies the presentation of deferred income taxes by requiring that deferred tax liabilities and assets be classified as noncurrent in the balance sheet. The update is effective for public companies for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The guidance may be adopted prospectively or retrospectively and early adoption is permitted. As of December 31, 2015, the Company elected to early adopt this ASU 2015-17 on a prospective basis and therefore, prior years were not retrospectively adjusted.

In April 2015, the FASB issued Accounting Standard Update No. 2015-03 (“ASU 2015-03”), Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. This update is effective for fiscal years beginning after December 15, 2015, and is required to be applied retrospectively. The Company adopted this standard in the first quarter of 2016 on a retrospective basis. As a result, the Company presented $3,502 of unamortized debt issuance costs that had been included in other assets in the consolidated balance sheet as of December 31, 2015 as direct deductions from the carrying amounts of the related debt liabilities.

In May 2014, the FASB issued Accounting Standard Update No. 2014-09 (“ASU 2014-09”), Revenue from Contracts with Customers (Topic 606), which supersedes the existing revenue recognition requirements. ASU 2014-09 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 has been deferred to be effective for fiscal years beginning after December 15, 2017, including interim periods within that reporting period, which will be its first quarter of fiscal 2018. Although early adoption is permitted in fiscal 2017, the Company expects to adopt ASU 2014-09 in first quarter of 2018. The Company is currently evaluating the impact of ASU 2014-09 on its consolidated financial statements.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Computations For Basic And Diluted Earnings Per Share

The computations for basic and diluted earnings (loss) per share are as follows:

	Three Months Ended				Nine Months Ended
(shares in thousands)	September 30,				September 30,
	2016		2015		2016			2015
Net income (loss)	$	4,560	$	312	$	(1,194	)	$	(5,354	)
Weighted-average common shares outstanding — basic		60,811		60,496		60,676			60,411
Effect of stock options and restricted stock units		715		345		—			—
Weighted-average common shares outstanding — diluted		61,526		60,841		60,676			60,411
Earnings (loss) per share —basic	$	0.08	$	—	$	(0.02	)	$	(0.09	)
Earnings (loss) per share — diluted	$	0.08	$	—	$	(0.02	)	$	(0.09	)

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Accounts Receivable And Contracts In Progress (Tables)

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Schedule Of Accounts Receivable

Accounts receivable at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Completed contracts	$	12,379		$	37,111
Contracts in progress		87,965			70,787
Retainage		20,340			27,203
		120,684			135,101
Allowance for doubtful accounts		(469	)		(754	)
Total accounts receivable—net	$	120,215		$	134,347
Current portion of accounts receivable—net	$	115,753		$	130,777
Long-term accounts receivable and retainage		4,462			3,570
Total accounts receivable—net	$	120,215		$	134,347

Components Of Contracts In Progress

The components of contracts in progress at September 30, 2016 and December 31, 2015 are as follows:

	September 30,			December 31,
	2016			2015
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	404,541		$	230,159
Amounts billed		(351,754	)		(176,283	)
Costs and earnings in excess of billings for contracts in progress		52,787			53,876
Costs and earnings in excess of billings for completed contracts		23,056			27,319
Total contract revenues in excess of billings	$	75,843		$	81,195
Billings in excess of costs and earnings:
Amounts billed	$	(270,274	)	$	(207,550	)
Costs and earnings for contracts in progress		260,597			200,489
Total billings in excess of contract revenues	$	(9,677	)	$	(7,061	)

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Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2016

Payables And Accruals [Abstract]

Accrued Expenses

Accrued expenses at September 30, 2016 and December 31, 2015 are as follows:

	September 30,		December 31,
	2016		2015
Insurance	$	15,962	$	16,291
Accumulated deficit in joint ventures		14,359		15,408
Payroll and employee benefits		7,282		13,317
Income and other taxes		4,341		3,726
Interest		4,014		8,743
Percentage of completion adjustment		2,876		2,837
Fuel hedge contracts		—		4,388
Other		8,531		7,567
Total accrued expenses	$	57,365	$	72,277

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Impairment Of Goodwill (Tables)

9 Months Ended

Sep. 30, 2016

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The change in the carrying value of goodwill for the period ended September 30, 2015 is as follows:

	DredgingSegment		Environmental & InfrastructureSegment			Total
Balance — December 31, 2014	$	76,576	$	9,750		$	86,326
Impairment of goodwill		—		(2,750	)		(2,750	)
BALANCE—September 30, 2015	$	76,576	$	7,000		$	83,576

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule Of Fair Values Of Financial Instruments And Nonfinancial Assets And Liabilities Measured At The Reporting Date

The fair values of these financial instruments are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	At September 30, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	869	$	—	$	869	$	—

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	4,388	$	—	$	4,388	$	—

Schedule Fair Value Measurements Balance Sheet Location

The fair value of the fuel hedge contracts outstanding as of September 30, 2016 and December 31, 2015 is as follows:

		Fair Value at
		September 30,			December 31,
	Balance Sheet Location	2016			2015
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	(28	)	$	—
Derivatives not designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets		897			—
Total asset derivatives		$	869		$	—
Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	—		$	4,388

Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation

The fair value of goodwill was determined using quantitative models that contained significant unobservable inputs. See Note 6.

	FairValue Measurements Using Significant Unobservable Inputs (Level 3)
	2015
Goodwill
Balance at January 1,	$	86,326
Impairment of goodwill		(2,750	)
Balance at December 31,	$	83,576

Changes In Components Of Accumulated Other Comprehensive Income (Loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Cumulative translation adjustments—net of tax	$	39		$	(639	)	$	596		$	(1,394	)
Derivatives:
Reclassification of derivative losses to earnings—net of tax		46			—			46			—
Change in fair value of derivatives—net of tax		(63	)		—			(63	)		—
Net unrealized gain on derivatives—net of tax		(17	)		—			(17	)		—
Total other comprehensive income (loss)	$	22		$	(639	)	$	579		$	(1,394	)

Adjustments Reclassified From Accumulated Other Comprehensive Loss To Earnings

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

		Three Months Ended		Nine Months Ended
		September 30,		September 30,
	Statement of Operations Location	2016		2016
Derivatives:
Fuelhedge contracts	Costs of contract revenues	$	76	$	76
	Income tax benefit		30		30
		$	46	$	46

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Segment Reporting By Segment

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Dredging
Contract revenues	$	154,448		$	162,526		$	453,122		$	506,700
Operating income		5,553			19,598			26,762			45,587
Environmental & infrastructure
Contract revenues	$	44,565		$	60,451		$	103,437		$	131,929
Operating income (loss)		7,307			(9,906	)		(10,173	)		(29,164	)
Intersegment revenues	$	(144	)	$	(2,175	)	$	(2,379	)	$	(4,393	)
Total
Contract revenues	$	198,869		$	220,802		$	554,180		$	634,236
Operating income		12,860			9,692			16,589			16,423

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Subsidiary Guarantors (Tables)

9 Months Ended

Sep. 30, 2016

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

Condensed Consolidating of Balance Sheet

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF SEPTEMBER 30, 2016
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	13,064		$	529	$	2	$	—		$	13,595
Accounts receivable — net		115,335			418		—		—			115,753
Contract revenues in excess of billings		73,765			2,078		—		—			75,843
Inventories		35,734			—		—		—			35,734
Prepaid expenses and other current assets		77,988			185		168		—			78,341
Total current assets		315,886			3,210		170		—			319,266
PROPERTY AND EQUIPMENT—Net		436,684			7		—		—			436,691
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		85,314			—		—		—			85,314
INVENTORIES — Noncurrent		48,706			—		—		—			48,706
INVESTMENTS IN JOINT VENTURES		5,791			—		—		—			5,791
RECEIVABLES FROM AFFILIATES		10,982			6,637		85,327		(102,946	)		—
INVESTMENTS IN SUBSIDIARIES		3,551			—		640,658		(644,209	)		—
OTHER		7,558			1		807		—			8,366
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	108,883		$	372	$	—	$	—		$	109,255
Accrued expenses		52,424			764		4,177		—			57,365
Revolving Credit Facility		—			—		60,000		—			60,000
Billings in excess of contract revenues		9,557			120		—		—			9,677
Current portion of long term debt		1,449			—		10,296		—			11,745
Total current liabilities		172,313			1,256		74,473		—			248,042
7 3/8% SENIOR NOTES		—			—		272,748		—			272,748
NOTES PAYABLE		220			—		44,792		—			45,012
DEFERRED INCOME TAXES		(794	)		—		74,547		—			73,753
PAYABLES TO AFFILIATES		91,359			5,926		5,661		(102,946	)		—
OTHER		9,838			—		164		—			10,002
Total liabilities		272,936			7,182		472,385		(102,946	)		649,557
TOTAL EQUITY		641,536			2,673		254,577		(644,209	)		254,577
TOTAL	$	914,472		$	9,855	$	726,962	$	(747,155	)	$	904,134

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF DECEMBER 31, 2015
(In thousands)
ASSETS	Subsidiary Guarantors			Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations			Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	12,035		$	2,147	$	2	$	—		$	14,184
Accounts receivable — net		129,978			799		—		—			130,777
Contract revenues in excess of billings		79,477			1,718		—		—			81,195
Inventories		35,963			—		—		—			35,963
Prepaid expenses and other current assets		66,919			218		477		—			67,614
Total current assets		324,372			4,882		479		—			329,733
PROPERTY AND EQUIPMENT—Net		430,192			18		—		—			430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		86,004			—		—		—			86,004
INVENTORIES — Noncurrent		41,646			—		—		—			41,646
INVESTMENTS IN JOINT VENTURES		3,761			—		—		—			3,761
RECEIVABLES FROM AFFILIATES		18,326			6,009		70,738		(95,073	)		—
INVESTMENTS IN SUBSIDIARIES		3,706			—		621,984		(625,690	)		—
OTHER		6,702			3		65		—			6,770
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	118,619		$	227	$	—	$	—		$	118,846
Accrued expenses		62,861			509		8,907		—			72,277
Billings in excess of contract revenues		6,964			97		—		—			7,061
Current portion of long term debt		1,424			—		6,082		—			7,506
Total current liabilities		189,868			833		14,989		—			205,690
7 3/8% SENIOR NOTES		—			—		271,998		—			271,998
REVOLVING CREDIT FACILITY		—			—		20,000		—			20,000
NOTE PAYABLE		323			—		53,469		—			53,792
DEFERRED INCOME TAXES		(783	)		—		74,789		—			74,006
PAYABLES TO AFFILIATES		85,859			3,505		5,709		(95,073	)		—
OTHER		20,326			—		139		—			20,465
Total liabilities		295,593			4,338		441,093		(95,073	)		645,951
TOTAL EQUITY		619,116			6,574		252,173		(625,690	)		252,173
TOTAL	$	914,709		$	10,912	$	693,266	$	(720,763	)	$	898,124

Schedule Of Condensed Consolidating Operations And Comprehensive Income

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	554,388		$	1,333		$	—		$	(1,541	)	$	554,180
Costs of contract revenues		(486,220	)		(5,210	)		—			1,541			(489,889	)
Gross profit		68,168			(3,877	)		—			—			64,291
OPERATING EXPENSES:
General and administrative expenses		47,076			4			(53	)		—			47,027
Loss on sale of assets—net		675			—			—			—			675
Operating income (loss)		20,417			(3,881	)		53			—			16,589
Interest expense—net		531			—			(16,974	)		—			(16,443	)
Equity in earnings (loss) of subsidiaries		(181	)		—			15,082			(14,901	)		—
Equity in earnings of joint ventures		19			—			—			—			19
Other expense		(1,910	)		(8	)		—			—			(1,918	)
Income (loss) before income taxes		18,876			(3,889	)		(1,839	)		(14,901	)		(1,753	)
Income tax (provision) benefit		—			(86	)		645			—			559
Net income (loss)	$	18,876		$	(3,975	)	$	(1,194	)	$	(14,901	)	$	(1,194	)
Comprehensive income (loss)	$	18,859		$	(3,379	)	$	(615	)	$	(15,480	)	$	(615	)

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
Contract revenues	$	624,498		$	11,912		$	—		$	(2,174	)	$	634,236
Costs of contract revenues		(558,343	)		(11,013	)		—			2,174			(567,182	)
Gross profit		66,155			899			—			—			67,054
OPERATING EXPENSES:
General and administrative expenses		48,768			—			—			—			48,768
Impairment of goodwill		2,750			—			—			—			2,750
Gain on sale of assets—net		(887	)		—			—			—			(887	)
Operating income		15,524			899			—			—			16,423
Interest expense—net		(349	)		—			(18,141	)		—			(18,490	)
Equity in earnings of subsidiaries		6			—			9,663			(9,669	)		—
Equity in loss of joint ventures		(5,765	)		—			—			—			(5,765	)
Other expense		(346	)		(7	)		—			—			(353	)
Income (loss) before income taxes		9,070			892			(8,478	)		(9,669	)		(8,185	)
Income tax (provision) benefit		7			(300	)		3,124			—			2,831
Net income (loss)	$	9,077		$	592		$	(5,354	)	$	(9,669	)	$	(5,354	)
Comprehensive income (loss)	$	9,077		$	(802	)	$	(6,748	)	$	(8,275	)	$	(6,748	)

Condensed Cash Flow Statement

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2016
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Cash provided by (used in) operating activities	$	36,242		$	(3,096	)	$	(20,168	)	$	—		$	12,978
INVESTING ACTIVITIES:
Purchases of property and equipment		(58,842	)		—			—			—			(58,842	)
Proceeds from dispositions of property and equipment		10,455			—			—			—			10,455
Net change in accounts with affiliates		10,505			—			—			(10,505	)		—
Net cash flows used in investing activities		(37,882	)		—			—			(10,505	)		(48,387	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(332	)		—			(332	)
Repayments of long term note payable		—			—			(803	)		—			(803	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayments of equipment debt		(1,064	)		—			—			—			(1,064	)
Net change in accounts with affiliates		26,733			1,452			(38,690	)		10,505			—
Intercompany dividends		(23,000	)		—			23,000			—			—
Exercise of options and purchases from employee stock plans		—			—			905			—			905
Taxes paid on settlement of vested share awards		—			—			(162	)		—			(162	)
Borrowings under revolving loans		—			—			133,000			—			133,000
Repayments of revolving loans		—			—			(93,000	)		—			(93,000	)
Net cash flows provided by financing activities		2,669			1,452			20,168			10,505			34,794
Effect of foreign currency exchange rates on cash and cash equivalents		—			26			—			—			26
Net increase (decrease) in cash and cash equivalents		1,029			(1,618	)		—			—			(589	)
Cash and cash equivalents at beginning of period		12,035			2,147			2			—			14,184
Cash and cash equivalents at end of period	$	13,064		$	529		$	2		$	—		$	13,595

GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2015
(In thousands)
	Subsidiary Guarantors			Non-Guarantor Subsidiaries			GLDD Corporation			Eliminations			Consolidated Totals
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	$	15,013		$	(1,308	)	$	(17,602	)	$	—		$	(3,897	)
INVESTING ACTIVITIES:
Purchases of property and equipment		(53,394	)		—			—			—			(53,394	)
Proceeds from dispositions of property and equipment		1,167			—			—			—			1,167
Net change in accounts with affiliates		(29,059	)		—			(9,839	)		38,898			—
Net cash flows used in investing activities		(81,286	)		—			(9,839	)		38,898			(52,227	)
FINANCING ACTIVITIES:
Deferred financing fees		—			—			(29	)		—			(29	)
Repayments of long term note payable		—			—			(488	)		—			(488	)
Taxes paid on settlement of vested share awards		—			—			(265	)		—			(265	)
Repayments of term loan facility		—			—			(3,750	)		—			(3,750	)
Repayment of equipment debt		(853	)		—			—			—			(853	)
Proceeds from equipment debt		—			—			410			—			410
Net change in accounts with affiliates		17,416			1,355			20,127			(38,898	)		—
Capital contributions		16,800			—			(16,800	)		—			—
Exercise of options and purchases from employee stock plans		—			—			1,356			—			1,356
Excess income tax benefit from share-based compensation		—			—			(13	)		—			(13	)
Treasury stock		—			—			(1,107	)		—			(1,107	)
Borrowings under revolving loans		—			—			146,000			—			146,000
Repayments of revolving loans		—			—			(118,000	)		—			(118,000	)
Net cash flows provided by financing activities		33,363			1,355			27,441			(38,898	)		23,261
Effect of foreign currency exchange rates on cash and cash equivalents		—			(105	)		—			—			(105	)
Net decrease in cash and cash equivalents		(32,910	)		(58	)		—			—			(32,968	)
Cash and cash equivalents at beginning of period		41,724			663			2			—			42,389
Cash and cash equivalents at end of period	$	8,814		$	605		$	2		$	—		$	9,421

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Basis Of Presentation (Narrative) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2015 USD ($)	Sep. 30, 2016 segment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Average equipment-related costs of total costs of contract revenue		21.00%
Number of operating Segments | segment		2
Number of reportable segments | segment		2
Number of reportable segments with goodwill | segment		3
Impairment of goodwill | $			$ 2,750
Unamortized debt issuance costs | $				$ 3,502
Terra Contracting Services [Member]
Nature Of Business And Summary Of Significant Accounting Policies [Line Items]
Impairment of goodwill | $	$ 2,750

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Earnings Per Share (Narrative) (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Shares excluded from computation of diluted earnings per share	1,594	1,170	1,603
Securities excluded from computation of earnings per share amount due to loss			576	462

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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income (loss)	$ 4,560	$ 312	$ (1,194)	$ (5,354)
Weighted-average common shares outstanding — basic	60,811	60,496	60,676	60,411
Effect of stock options and restricted stock units	715	345
Weighted-average common shares outstanding — diluted	61,526	60,841	60,676	60,411
Earnings (loss) per share — basic	$ 0.08		$ (0.02)	$ (0.09)
Earnings (loss) per share — diluted	$ 0.08		$ (0.02)	$ (0.09)

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Accounts Receivable And Contracts In Progress (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Completed contracts	$ 12,379	$ 37,111
Contracts in progress	87,965	70,787
Retainage	20,340	27,203
Accounts receivable, gross	120,684	135,101
Allowance for doubtful accounts	(469)	(754)
Total accounts receivable—net	120,215	134,347
Current portion of accounts receivable—net	115,753	130,777
Long-term accounts receivable and retainage	$ 4,462	$ 3,570

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Accounts Receivable And Contracts In Progress (Components Of Contracts In Progress) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings in excess of billings for contracts in progress	$ 52,787	$ 53,876
Costs and earnings in excess of billings for completed contracts	23,056	27,319
Total contract revenues in excess of billings	75,843	81,195
Total billings in excess of contract revenues	(9,677)	(7,061)
Costs And Earnings In Excess Of Billings [Member]
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings for contracts in progress	404,541	230,159
Amounts billed	(351,754)	(176,283)
Billings In Excess Of Costs And Earnings [Member]
Accounts Notes And Loans Receivable [Line Items]
Costs and earnings for contracts in progress	260,597	200,489
Amounts billed	$ (270,274)	$ (207,550)

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Accounts Receivable And Contracts In Progress (Narrative) (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Receivables [Abstract]
Costs in excess of billings	$ 17,910

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Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Insurance	$ 15,962	$ 16,291
Accumulated deficit in joint ventures	14,359	15,408
Payroll and employee benefits	7,282	13,317
Income and other taxes	4,341	3,726
Interest	4,014	8,743
Percentage of completion adjustment	2,876	2,837
Fuel hedge contracts		4,388
Other	8,531	7,567
Total accrued expenses	$ 57,365	$ 72,277

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Long-Term Debt (Narrative) (Details) - USD ($)		3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 24, 2016	Mar. 31, 2015	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Nov. 04, 2014	Jun. 04, 2012
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 199,000,000								$ 210,000,000
Net book value of related assets				$ 132,178,000
Fixed Charge Coverage Ratio				1.25%
Revolving credit facility				$ 60,000,000
Letters of credit outstanding				68,893,000
Letter of credit remaining borrowing capacity				70,107,000
Borrowed aggregate principal amount						$ 2,640,000	$ 47,360,000
Purchases of property and equipment				58,842,000	$ 53,394,000
Long-term Debt, Current Maturities				11,745,000		$ 7,506,000
7.375% Senior Notes Due In 2019 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				$ 275,000,000
Debt Instrument, Interest Rate, Stated Percentage				7.375%
Maturity date				Feb. 01, 2019
If Redeemed In 2015 [Member] | 7.375% Senior Notes Due In 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				103.70%
If Redeemed In 2016 [Member] | 7.375% Senior Notes Due In 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				101.80%
If Redeemed After 2016 [Member] | 7.375% Senior Notes Due In 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Term Loan Facility [Member]
Debt Instrument [Line Items]
Net book value of related assets				$ 47,975,000
Debt instrument, face amount								$ 50,000,000
Debt Instrument, Term				5 years
Term Loan Facility Bear Interest Fixed Rate				4.655%
Debt Instrument, Interest Rate, Increase (Decrease)				2.00%
Percentage of principal to be repaid yearly during first two years of term				10.00%
Percentage of principal to be repaid yearly during third and fourth years of term				20.00%
Percentage of principal to be repaid during fifth year of term				25.00%
Vessels and Ancillary Equipment [Member]
Debt Instrument [Line Items]
Purchases of property and equipment		$ 15,569,000
Operating leases expiration year				2023
Long-term Debt, Current Maturities		2,442,000
Long-term Debt, Excluding Current Maturities		$ 15,275,000
Vessels and Ancillary Equipment [Member] | 5.75% Senior Notes Due In 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Maximum [Member]
Debt Instrument [Line Items]
Total leverage ratio for fiscal quarter ending June 30, 2016				5.00%
Total leverage ratio for fiscal quarter ending September 30, 2016				4.75%
Total leverage ratio for any fiscal quarter ending thereafter				4.50%
Aggregate capital expenditures for fiscal year ending December 30, 2016				$ 105,000,000
Aggregate capital expenditures during any fiscal year thereafter				$ 45,000,000
Maximum [Member] | LIBOR Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			3.50%
Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.50%
Minimum [Member] | LIBOR Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.50%
Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.50%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									199,000,000
Line of credit facility optional increase capacity									15,000,000
Revolving credit facility, interest rate description				The Credit Agreement is collateralized by a substantial portion of the Company’s operating equipment with a net book value at September 30, 2016 of $132,178. Depending on the Company’s consolidated total leverage ratio (as defined in the Credit Agreement and further described below), borrowings under the revolving credit facility will bear interest at the option of the Company at either the LIBOR rate plus a margin between 1.50% and 3.50% or a base rate plus a margin between 0.50% and 2.50%.
Revolving credit facility, maturity date				Jun. 02, 2017
Repayments of Lines of Credit	$ 10,000,000
Multicurrency [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									50,000,000
Swingline Loans [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									$ 10,000,000

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Impairment Of Goodwill (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015
Goodwill [Line Items]
Impairment of goodwill		$ 2,750
Terra Contracting Services [Member]
Goodwill [Line Items]
Impairment of goodwill	$ 2,750

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Impairment Of Goodwill (Change In The Carrying Amount Of Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 86,326
Impairment of goodwill	(2,750)
Goodwill, Ending Balance	83,576
Dredging Segment [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	76,576
Goodwill, Ending Balance	76,576
Environmental & Remediation Segment [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	9,750
Impairment of goodwill	(2,750)
Goodwill, Ending Balance	$ 7,000

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Fair Value Measurements (Fair Value Measurements At Reporting Date Using) (Details) - Fuel Hedge Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ 869	$ 4,388
Fair Value, Inputs, Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Net Asset (Liability)	$ 869	$ 4,388

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Fair Value Measurements (Narrative) (Details) gal in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) $ / gal	Jun. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) $ / gal gal	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Derivatives Fair Value [Line Items]
Derivative underlying hedge percent			80.00%
Derivative, Nonmonetary Notional Amount, Volume | gal			8.6
Fair value hedge assets	$ 869,000		$ 869,000
Fair value hedge liabilities					$ 4,388,000
Reclassification of derivative losses to earnings-net of tax	(46,000)		(46,000)
Impairment of goodwill				$ 2,750,000
7.375% Senior Notes Due In 2019 [Member]
Derivatives Fair Value [Line Items]
Debt instrument, face amount	$ 275,000,000		$ 275,000,000
Stated interest rate	7.375%		7.375%
Maturity date			Feb. 01, 2019
7.375% Senior Notes Due In 2019 [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives Fair Value [Line Items]
Fair value of debt	$ 269,500,000		$ 269,500,000
Terra Contracting Services [Member]
Derivatives Fair Value [Line Items]
Impairment of goodwill		$ 2,750,000
Minimum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | $ / gal	1.02		1.02
Maximum [Member]
Derivatives Fair Value [Line Items]
Fixed price range | $ / gal	1.70		1.70

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Fair Value Measurements (Schedule of Balance Sheet Location Fuel Hedge Contracts) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Fair value hedge assets	$ 869
Fair value hedge liabilities		$ 4,388
Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member] | Fuel Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Fair value hedge assets	(28)
Not Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member] | Fuel Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Fair value hedge assets	$ 897
Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member] | Fuel Hedge Contracts [Member]
Derivatives Fair Value [Line Items]
Fair value hedge liabilities		$ 4,388

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Fair Value Measurements (Fair Value Measurements Using Significant Unobservable) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Impairment of goodwill	$ (2,750)
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 86,326	$ 86,326
Impairment of goodwill		(2,750)
Ending balance		$ 83,576

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Fair Value Measurements (Changes In Components Of Accumulated Other Comprehensive (Income) Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Cumulative translation adjustments—net of tax	[1]	$ 39	$ (639)	$ 596	$ (1,394)
Reclassification of derivative losses to earnings—net of tax		46		46
Change in fair value of derivatives—net of tax		(63)		(63)
Net unrealized gain on derivatives—net of tax	[2]	(17)		(17)
Other comprehensive income (loss)—net of tax		$ 22	$ (639)	$ 579	$ (1,394)

[1] Net of income tax (provision) benefit of $(25) and $422 for the three months ended September 30, 2016 and 2015, respectively and $(395) and $922 for the nine months ended September 30, 2016 and 2015, respectively.

[2] Net of income tax benefit of $11 for the three and nine months ended September 30, 2016, respectively.

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Fair Value Measurements (Adjustments Reclassified From Accumulated Balances Other Comprehensive Loss To Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments Gain Loss [Line Items]
Costs of contract revenues	$ (178,824)	$ (196,717)	$ (489,889)	$ (567,182)
Income tax (provision) benefit	2,850	742	(559)	(2,831)
Net income (loss)	(4,560)	$ (312)	1,194	$ 5,354
Fuel Hedge Contracts [Member] | Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges | Reclassification Out Of Accumulated Other Comprehensive Income
Derivative Instruments Gain Loss [Line Items]
Costs of contract revenues	76		76
Income tax (provision) benefit	30		30
Net income (loss)	$ 46		$ 46

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Share-Based Compensation (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units	716
Share-based compensation expense		$ 270	$ 839	$ 2,276	$ 2,897
Employees And Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant		5,800		5,800

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Commitments And Contingencies (Narrative) (Details) - USD ($)			9 Months Ended
	Feb. 05, 2016	Jan. 14, 2015	Sep. 30, 2016
Commitments And Contingencies [Line Items]
Outstanding performance bonds			$ 1,043,976,000
Revenue value remaining from outstanding performance bonds			422,956,000
Tentative settlement subject to final documentation	$ 275,000
Proceeds from Legal Settlements		$ 5,309,000
Discontinued Operations [Member]
Commitments And Contingencies [Line Items]
Outstanding performance bonds			41,082,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Bids bond range			$ 1,000,000
Warranty periods			1 year
Maximum [Member]
Commitments And Contingencies [Line Items]
Bids bond range			$ 10,000,000
Warranty periods			3 years

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Investments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Accumulated deficit in joint ventures		$ 14,359	$ 15,408
TerraSea Environmental Solutions [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership percentage		50.00%
Other current assets		$ 24,898	27,592
Accumulated deficit in joint ventures		$ 14,359	$ 14,271
Provision for losses to be assumed	$ 1,506

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Business Combinations And Dispositions (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended
	Nov. 04, 2014	Apr. 23, 2014	Sep. 30, 2016	Jun. 30, 2015
Great Lakes Environmental & Infrastructure, LLC [Member]
Business Acquisition [Line Items]
Adjustment to fair value of debt			$ 8,940
Fair value of debt			0
Maximum potential aggregate earnout payment			$ 11,400
Magnus Pacific Acquisition [Member]
Business Acquisition [Line Items]
Base purchase price	$ 40,000
Payments for Previous Acquisition	$ 25,000
Magnus Pacific Acquisition [Member] | 5.75% Senior Notes Due In 2023 [Member]
Business Acquisition [Line Items]
Adjustment to fair value of debt				$ 7,013
Fair value of debt				$ 0
NASDI and Yankee
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses		$ 5,309

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Segment Information (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Contract revenues	$ 198,869	$ 220,802	$ 554,180	$ 634,236
Dredging Segment [Member] | Foreign [Member]
Segment Reporting Information [Line Items]
Contract revenues	$ 21,139	$ 38,042	$ 34,331	$ 127,280

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Segment Information (Segment Reporting By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Contract revenues	$ 198,869	$ 220,802	$ 554,180	$ 634,236
Operating income (loss)	12,860	9,692	16,589	16,423
Dredging Segment [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	5,553	19,598	26,762	45,587
Environmental And Infrastructure Segment [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	7,307	(9,906)	(10,173)	(29,164)
Operating Segment [Member] | Dredging Segment [Member]
Segment Reporting Information [Line Items]
Contract revenues	154,448	162,526	453,122	506,700
Operating Segment [Member] | Environmental And Infrastructure Segment [Member]
Segment Reporting Information [Line Items]
Contract revenues	44,565	60,451	103,437	131,929
Intersegment Revenues [Member]
Segment Reporting Information [Line Items]
Contract revenues	$ (144)	$ (2,175)	$ (2,379)	$ (4,393)

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Subsidiary Guarantors (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
7 3/8% SENIOR NOTES	$ 272,748	$ 271,998
Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
7 3/8% SENIOR NOTES	$ 275,000
Debt Instrument, Interest Rate, Stated Percentage	7.375%
Owned Domestic Subsidiaries Percent	100.00%

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Subsidiary Guarantors (Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 13,595	$ 14,184	$ 9,421	$ 42,389
Accounts receivable—net	115,753	130,777
Contract revenues in excess of billings	75,843	81,195
Inventories	35,734	35,963
Prepaid expenses and other current assets	78,341	67,614
Total current assets	319,266	329,733
PROPERTY AND EQUIPMENT—Net	436,691	430,210
GOODWILL AND OTHER INTANGIBLE ASSETS—Net	85,314	86,004
INVENTORIES—Noncurrent	48,706	41,646
INVESTMENTS IN JOINT VENTURES	5,791	3,761
OTHER	8,366	6,770
TOTAL	904,134	898,124
LIABILITIES AND EQUITY
Accounts payable	109,255	118,846
Accrued expenses	57,365	72,277
Revolving Credit Facility	60,000
Billings in excess of contract revenues	9,677	7,061
Current portion of long term debt	11,745	7,506
Total current liabilities	248,042	205,690
7 3/8% SENIOR NOTES	272,748	271,998
REVOLVING CREDIT FACILITY		20,000
NOTES PAYABLE	45,012	53,792
DEFERRED INCOME TAXES	73,753	74,006
OTHER	10,002	20,465
Total liabilities	649,557	645,951
TOTAL EQUITY	254,577	252,173	252,083	255,963
TOTAL	904,134	898,124
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	13,064	12,035	8,814	41,724
Accounts receivable—net	115,335	129,978
Contract revenues in excess of billings	73,765	79,477
Inventories	35,734	35,963
Prepaid expenses and other current assets	77,988	66,919
Total current assets	315,886	324,372
PROPERTY AND EQUIPMENT—Net	436,684	430,192
GOODWILL AND OTHER INTANGIBLE ASSETS—Net	85,314	86,004
INVENTORIES—Noncurrent	48,706	41,646
INVESTMENTS IN JOINT VENTURES	5,791	3,761
RECEIVABLES FROM AFFILIATES	10,982	18,326
INVESTMENTS IN SUBSIDIARIES	3,551	3,706
OTHER	7,558	6,702
TOTAL	914,472	914,709
LIABILITIES AND EQUITY
Accounts payable	108,883	118,619
Accrued expenses	52,424	62,861
Billings in excess of contract revenues	9,557	6,964
Current portion of long term debt	1,449	1,424
Total current liabilities	172,313	189,868
NOTES PAYABLE	220	323
Deferred Tax Assets	(794)	(783)
PAYABLES TO AFFILIATES	91,359	85,859
OTHER	9,838	20,326
Total liabilities	272,936	295,593
TOTAL EQUITY	641,536	619,116
TOTAL	914,472	914,709
Non Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	529	2,147	605	663
Accounts receivable—net	418	799
Contract revenues in excess of billings	2,078	1,718
Prepaid expenses and other current assets	185	218
Total current assets	3,210	4,882
PROPERTY AND EQUIPMENT—Net	7	18
RECEIVABLES FROM AFFILIATES	6,637	6,009
OTHER	1	3
TOTAL	9,855	10,912
LIABILITIES AND EQUITY
Accounts payable	372	227
Accrued expenses	764	509
Billings in excess of contract revenues	120	97
Total current liabilities	1,256	833
PAYABLES TO AFFILIATES	5,926	3,505
Total liabilities	7,182	4,338
TOTAL EQUITY	2,673	6,574
TOTAL	9,855	10,912
GLDD Corporation [Member]
ASSETS
Cash and cash equivalents	2	2	$ 2	$ 2
Prepaid expenses and other current assets	168	477
Total current assets	170	479
RECEIVABLES FROM AFFILIATES	85,327	70,738
INVESTMENTS IN SUBSIDIARIES	640,658	621,984
OTHER	807	65
TOTAL	726,962	693,266
LIABILITIES AND EQUITY
Accrued expenses	4,177	8,907
Revolving Credit Facility	60,000
Current portion of long term debt	10,296	6,082
Total current liabilities	74,473	14,989
7 3/8% SENIOR NOTES	272,748	271,998
REVOLVING CREDIT FACILITY		20,000
NOTES PAYABLE	44,792	53,469
DEFERRED INCOME TAXES	74,547	74,789
PAYABLES TO AFFILIATES	5,661	5,709
OTHER	164	139
Total liabilities	472,385	441,093
TOTAL EQUITY	254,577	252,173
TOTAL	726,962	693,266
Consolidation Eliminations [Member]
ASSETS
RECEIVABLES FROM AFFILIATES	(102,946)	(95,073)
INVESTMENTS IN SUBSIDIARIES	(644,209)	(625,690)
TOTAL	(747,155)	(720,763)
LIABILITIES AND EQUITY
PAYABLES TO AFFILIATES	(102,946)	(95,073)
Total liabilities	(102,946)	(95,073)
TOTAL EQUITY	(644,209)	(625,690)
TOTAL	$ (747,155)	$ (720,763)

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Subsidiary Guarantors (Condensed Consolidated Statement Operations And Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Contract revenues	$ 198,869	$ 220,802	$ 554,180	$ 634,236
Costs of contract revenues	(178,824)	(196,717)	(489,889)	(567,182)
Gross profit	20,045	24,085	64,291	67,054
General and administrative expenses	7,187	15,277	47,027	48,768
Impairment of goodwill				2,750
(Gain) loss on sale of assets—net	(2)	(884)	675	(887)
Operating income	12,860	9,692	16,589	16,423
Interest expense—net	(4,819)	(7,293)	(16,443)	(18,490)
Equity in earnings (loss) of joint ventures	6	(2,051)	19	(5,765)
Other income (expense)	(637)	706	(1,918)	(353)
Income (loss) before income taxes	7,410	1,054	(1,753)	(8,185)
Income tax (provision) benefit	(2,850)	(742)	559	2,831
Net income (loss)	4,560	312	(1,194)	(5,354)
Comprehensive income (loss)	4,582	(327)	(615)	(6,748)
Consolidation Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Contract revenues	(564)	(593)	(1,541)	(2,174)
Costs of contract revenues	564	593	1,541	2,174
Equity in earnings (loss) of subsidiaries	(13,038)	(8,146)	(14,901)	(9,669)
Income (loss) before income taxes	(13,038)	(8,146)	(14,901)	(9,669)
Net income (loss)	(13,038)	(8,146)	(14,901)	(9,669)
Comprehensive income (loss)	(13,060)	(7,507)	(15,480)	(8,275)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Contract revenues	198,100	216,993	554,388	624,498
Costs of contract revenues	(177,032)	(193,955)	(486,220)	(558,343)
Gross profit	21,068	23,038	68,168	66,155
General and administrative expenses	7,185	15,277	47,076	48,768
Impairment of goodwill				2,750
(Gain) loss on sale of assets—net	(2)	(884)	675	(887)
Operating income	13,885	8,645	20,417	15,524
Interest expense—net	896	(90)	531	(349)
Equity in earnings (loss) of subsidiaries	(3)	2	(181)	6
Equity in earnings (loss) of joint ventures	6	(2,051)	19	(5,765)
Other income (expense)	(637)	706	(1,910)	(346)
Income (loss) before income taxes	14,147	7,212	18,876	9,070
Income tax (provision) benefit		7		7
Net income (loss)	14,147	7,219	18,876	9,077
Comprehensive income (loss)	14,130	7,219	18,859	9,077
Non Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Contract revenues	1,333	4,402	1,333	11,912
Costs of contract revenues	(2,356)	(3,355)	(5,210)	(11,013)
Gross profit	(1,023)	1,047	(3,877)	899
General and administrative expenses			4
Operating income	(1,023)	1,047	(3,881)	899
Other income (expense)			(8)	(7)
Income (loss) before income taxes	(1,023)	1,047	(3,889)	892
Income tax (provision) benefit	(86)	(120)	(86)	(300)
Net income (loss)	(1,109)	927	(3,975)	592
Comprehensive income (loss)	(1,070)	288	(3,379)	(802)
GLDD Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
General and administrative expenses	2		(53)
Operating income	(2)		53
Interest expense—net	(5,715)	(7,203)	(16,974)	(18,141)
Equity in earnings (loss) of subsidiaries	13,041	8,144	15,082	9,663
Income (loss) before income taxes	7,324	941	(1,839)	(8,478)
Income tax (provision) benefit	(2,764)	(629)	645	3,124
Net income (loss)	4,560	312	(1,194)	(5,354)
Comprehensive income (loss)	$ 4,582	$ (327)	$ (615)	$ (6,748)

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Subsidiary Guarantors (Condensed Consolidated of Cash Flow) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	$ 12,978	$ (3,897)
INVESTING ACTIVITIES:
Purchases of property and equipment	(58,842)	(53,394)
Proceeds from dispositions of property and equipment	10,455	1,167
Net cash flows used in investing activities	(48,387)	(52,227)
FINANCING ACTIVITIES:
Deferred financing fees	(332)	(29)
Repayments of long term note payable	(803)	(488)
Taxes paid on settlement of vested share awards	(162)	(265)
Repayments of term loan facility	(3,750)	(3,750)
Repayments of equipment debt	(1,064)	(853)
Proceeds from equipment debt		410
Exercise of options and purchases from employee stock plans	905	1,356
Excess income tax benefit from share-based compensation		(13)
Treasury stock		(1,107)
Borrowings under revolving loans	133,000	146,000
Repayments of revolving loans	(93,000)	(118,000)
Net cash provided by financing activities	34,794	23,261
Effect of foreign currency exchange rates on cash and cash equivalents	26	(105)
Net decrease in cash and cash equivalents	(589)	(32,968)
Cash and cash equivalents at beginning of period	14,184	42,389
Cash and cash equivalents at end of period	13,595	9,421
Consolidation Eliminations [Member]
INVESTING ACTIVITIES:
Net change in accounts with affiliates	(10,505)	38,898
Net cash flows used in investing activities	(10,505)	38,898
FINANCING ACTIVITIES:
Net change in accounts with affiliates	10,505	(38,898)
Net cash provided by financing activities	10,505	(38,898)
Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	36,242	15,013
INVESTING ACTIVITIES:
Purchases of property and equipment	(58,842)	(53,394)
Proceeds from dispositions of property and equipment	10,455	1,167
Net change in accounts with affiliates	10,505	(29,059)
Net cash flows used in investing activities	(37,882)	(81,286)
FINANCING ACTIVITIES:
Repayments of equipment debt	(1,064)	(853)
Net change in accounts with affiliates	26,733	17,416
Capital contributions		16,800
Intercompany dividends	(23,000)
Net cash provided by financing activities	2,669	33,363
Net decrease in cash and cash equivalents	1,029	(32,910)
Cash and cash equivalents at beginning of period	12,035	41,724
Cash and cash equivalents at end of period	13,064	8,814
Non Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	(3,096)	(1,308)
FINANCING ACTIVITIES:
Net change in accounts with affiliates	1,452	1,355
Net cash provided by financing activities	1,452	1,355
Effect of foreign currency exchange rates on cash and cash equivalents	26	(105)
Net decrease in cash and cash equivalents	(1,618)	(58)
Cash and cash equivalents at beginning of period	2,147	663
Cash and cash equivalents at end of period	529	605
GLDD Corporation [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities	(20,168)	(17,602)
INVESTING ACTIVITIES:
Net change in accounts with affiliates		(9,839)
Net cash flows used in investing activities		(9,839)
FINANCING ACTIVITIES:
Deferred financing fees	(332)	(29)
Repayments of long term note payable	(803)	(488)
Taxes paid on settlement of vested share awards	(162)	(265)
Repayments of term loan facility	(3,750)	(3,750)
Proceeds from equipment debt		410
Net change in accounts with affiliates	(38,690)	20,127
Capital contributions		(16,800)
Intercompany dividends	23,000
Exercise of options and purchases from employee stock plans	905	1,356
Excess income tax benefit from share-based compensation		(13)
Treasury stock		(1,107)
Borrowings under revolving loans	133,000	146,000
Repayments of revolving loans	(93,000)	(118,000)
Net cash provided by financing activities	20,168	27,441
Cash and cash equivalents at beginning of period	2	2
Cash and cash equivalents at end of period	$ 2	$ 2