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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2014	Oct. 31, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
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		60,135,711

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 21,088	$ 75,338
Accounts receivable-net	98,118	96,515
Contract revenues in excess of billings	85,628	67,432
Inventories	33,194	32,500
Prepaid expenses and other current assets	58,440	44,164
Assets held for sale, current		45,104
Total current assets	296,468	361,053
PROPERTY AND EQUIPMENT-Net	382,331	345,620
GOODWILL AND OTHER INTANGIBLE ASSETS-Net	80,885	81,302
INVENTORIES-Noncurrent	37,324	38,496
INVESTMENTS IN JOINT VENTURES	8,445	8,256
Assets held for sale, noncurrent		8,856
OTHER	11,745	9,062
TOTAL	817,198	852,645
CURRENT LIABILITIES:
Accounts payable	139,341	116,121
Accrued expenses	49,755	38,531
Billings in excess of contract revenues	4,978	6,754
Current portion of long term debt	373
Liabilities held for sale		32,493
Total current liabilities	194,447	193,899
7 3/8% SENIOR NOTES	250,000	250,000
REVOLVING CREDIT FACILITY	35,000	35,000
LONG TERM NOTE PAYABLE	485
DEFERRED INCOME TAXES	90,040	108,511
LIABILITIES HELD FOR SALE-Noncurrent		1,212
OTHER	11,672	21,922
Total liabilities	581,644	610,544
COMMITMENTS AND CONTINGENCIES (Note 8)
EQUITY:
Common stock-$.0001 par value; 90,000 authorized, 60,136 and 59,670 shares issued	6	6
Additional paid-in capital	277,097	275,183
Accumulated deficit	(40,488)	(31,770)
Accumulated other comprehensive loss	(1,061)	(473)
Total Great Lakes Dredge & Dock Corporation equity	235,554	242,946
NONCONTROLLING INTERESTS		(845)
TOTAL EQUITY	235,554	242,101
TOTAL	$ 817,198	$ 852,645

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2014	Dec. 31, 2013
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	90,000	90,000
Common stock, shares issued	60,136	59,670
Common stock, shares outstanding	60,136	59,670
Senior Notes [Member]
Interest Rate, Stated Percentage	7.275%

Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidated Statements Of Operations [Abstract]
CONTRACT REVENUES	$ 202,198	$ 187,862	$ 561,289	$ 515,140
COSTS OF CONTRACT REVENUES	177,739	160,026	489,720	442,798
Gross profit	24,459	27,836	71,569	72,342
GENERAL AND ADMINISTRATIVE EXPENSES	16,062	17,121	49,850	48,700
Proceeds from loss of use claim				(13,272)
(Gain) loss on sale of assets-net	390	(3,214)	558	(3,141)
Operating income (loss)	8,007	13,929	21,161	40,055
Interest expense-net	(4,702)	(5,542)	(14,730)	(16,671)
Equity in earnings (loss) of joint ventures	(5,785)	1,427	(9,063)	452
Gain on bargain purchase acquisition			2,197
Other income (expense)	384	(178)	410	(403)
Income (loss) from continuing operations before income taxes	(2,096)	9,636	(25)	23,433
Income tax (provision) benefit	1,069	(3,060)	425	(8,326)
Income (loss) from continuing operations	(1,027)	6,576	400	15,107
Loss from discontinued operations, net of income taxes	(1,059)	(5,310)	(9,118)	(38,618)
Net income (loss)	(2,086)	1,266	(8,718)	(23,511)
Net loss attributable to noncontrolling interest		(182)		(151)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$ (2,086)	$ 1,448	$ (8,718)	$ (23,360)
Basic earnings (loss) per share attributable to continuing operations	$ (0.01)	$ 0.11	$ 0.01	$ 0.25
Basic loss per share attributable to discontinued operations, net of tax	(0.02)	(0.08)	(0.15)	(0.64)
Basic loss per share attributable to discontinued operations, net of tax	$ (0.03)	$ 0.03	$ (0.14)	$ (0.39)
Basic weighted average shares	60,040	59,526	59,870	59,444
Diluted earnings (loss) per share attributable to continuing operations	$ (0.01)	$ 0.11	$ 0.01	$ 0.25
Diluted loss per share attributable to discontinued operations, net of tax	(0.02)	(0.09)	(0.15)	(0.64)
Diluted earnings (loss) per share attributable to Great Lakes Dredge & Dock Corporation	$ (0.03)	$ 0.02	$ (0.14)	$ (0.39)
Diluted weighted average shares	60,040	60,082	60,491	60,000

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]

Net income (loss)

$ (2,086)

$ 1,266

$ (8,718)

$ (23,511)

Currency translation adjustment-net of tax (1)

^[1]

(416)

(51)

(389)

(131)

Net unrealized gain on derivatives-net of tax (2)

^[2]

(169)

(88)

(199)

(122)

Other comprehensive loss-net of tax

(585)

(139)

(588)

(253)

Comprehensive income (loss)

(2,671)

1,127

(9,306)

(23,764)

Comprehensive loss attributable to noncontrolling interests

182

151

Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation

$ (2,671)

$ 1,309

$ (9,306)

$ (23,613)

[1]	Net of income tax (expense) benefit of $276 and $(34) for the three months ended September 30, 2014 and 2013, respectively, and $259 and $(85) for nine months ended September 30, 2014 and 2013, respectively.
[2]	Net of income tax expense of $111 and $58 for the three months ended September 30, 2014 and 2013, respectively, and $132 and $81 for the nine months ended September 30, 2014 and 2013, respectively.

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Currency translation adjustment, tax	$ 276	$ (34)	$ 259	$ (85)
Net unrealized (gain) loss on derivatives-net of tax	$ 111	$ 58	$ 132	$ 81

Condensed Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]	Total
BALANCE - value at Dec. 31, 2012	$ 6	$ 271,418	$ 2,591	$ (380)	$ (210)	$ 273,425
BALANCE - shares at Dec. 31, 2012	59,359
Share-based compensation, Value		2,452				2,452
Share-based compensation, Shares	75
Vesting of restricted stock units, including impact of shares withheld for taxes, value		(305)				(305)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares	69
Exercise of options and purchases from employee stock plans, Value		581				581
Exercise of options and purchases from employee stock plans, Shares	122
Excess income tax benefit from share based compensation		133				133
Net loss			(23,360)		(151)	(23,511)
Other comprehensive loss-net of tax				(253)		(253)
BALANCE - value at Sep. 30, 2013	$ 6	274,279	(20,769)	(633)	(364)	252,519
BALANCE - shares at Sep. 30, 2013	59,625
Distributions paid to noncontrolling interests					(3)	(3)
BALANCE - value at Dec. 31, 2013	$ 6	275,183	(31,770)	(473)	(845)	242,101
BALANCE - shares at Dec. 31, 2013	59,670
Share-based compensation, Value		1,816				1,816
Share-based compensation, Shares	94
Vesting of restricted stock units, including impact of shares withheld for taxes, value		(501)				(501)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares	107
Exercise of options and purchases from employee stock plans, Value		1,542				1,542
Exercise of options and purchases from employee stock plans, Shares	265
Excess income tax benefit from share based compensation		45				45
Net loss			(8,718)			(8,718)
Other comprehensive loss-net of tax				(588)		(588)
BALANCE - value at Sep. 30, 2014	$ 6	277,097	$ (40,488)	$ (1,061)		235,554
BALANCE - shares at Sep. 30, 2014	60,136
Distributions paid to noncontrolling interests		$ (988)			$ 845	$ (143)

Condensed Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES:
Net loss	$ (8,718)	$ (23,511)
Loss from discontinued operations, net of income taxes	(9,118)	(38,618)
Income (loss) from continuing operations	400	15,107
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	32,744	33,777
Equity in (earnings) loss of joint ventures	9,063	(452)
Deferred income taxes	(11,034)	(936)
(Gain) loss on sale of assets	558	(3,141)
Gain on bargain purchase acquisition	2,197
Amortization of deferred financing fees	1,036	865
Unrealized net loss from mark-to-market valuations of derivatives	1,051
Unrealized foreign currency (gain) loss	(561)	99
Share-based compensation expense	1,816	2,452
Excess income tax benefit from share based compensation	(45)	(133)
Changes in assets and liabilities:
Accounts receivable	(3,791)	3,591
Contract revenues in excess of billings	(18,292)	(22,201)
Inventories	504	(3,955)
Prepaid expenses and other current assets in operation	2,743	10,793
Accounts payable and accrued expenses	10,927	5,278
Billings in excess of contract revenues	(1,776)	(6,630)
Other noncurrent assets and liabilities	(2,369)	(1,703)
Net cash flows provided by operating activities of continuing operations	15,291	11,225
Net cash flows used in operating activities of discontinued operations	(5,024)	(8,491)
Cash provided by operating activities	10,267	2,734
INVESTING ACTIVITIES:
Purchases of property and equipment	(66,433)	(37,968)
Proceeds from dispositions of property and equipment	1,614	4,194
Proceeds from (payments on) vendor performance obligations	(3,100)	13,600
Payments for acquisitions of businesses	(2,048)
Net cash flows used in investing activities of continuing operations	(69,967)	(20,174)
Net cash flows provided by investing activities of discontinued operations	5,275	(149)
Cash used in investing activities	(64,692)	(20,323)
FINANCING ACTIVITIES:
Deferred financing fees	(845)
Repayment of long term note payable		(10,547)
Taxes paid on settlement of vested share awards	(501)	(305)
Repayments of equipment debt	(121)	(6)
Purchase of noncontrolling interest	(205)
Exercise of options and purchases from employee stock plans	1,542	581
Excess income tax benefit from share-based compensation	45	133
Borrowings under revolving loans	105,000	194,500
Repayments of revolving loans	(105,000)	(149,500)
Net cash flows provided by (used in) financing activities of continuing operations	(85)	34,856
Net cash flows provided by (used in) financing activities of discontinued operations		(39)
Cash provided by (used in) financing activities	(85)	34,817
Effect of foreign currency exchange rates on cash and cash equivalents	260	(346)
Net increase (decrease) in cash and cash equivalents	(54,250)	16,882
Cash and cash equivalents at beginning of period	75,338	24,440
Cash and cash equivalents at end of period	21,088	41,322
Supplemental Cash Flow Information
Cash paid for interest	18,936	19,525
Cash paid (refunded) for income taxes	(9,364)	431
Non-cash Investing and Financing Activities
Property and equipment purchased but not yet paid	18,401	$ 12,432
Property and equipment purchased on capital leases and equipment notes	1,616
Purchase of noncontrolling interest	$ 988

Basis of presentation	9 Months Ended
Basis of presentation	Sep. 30, 2014
Basis of presentation
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, 2013. 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, 2014, and its results of operations for the three and nine months ended September 30, 2014 and 2013 and cash flows for the nine months ended September 30, 2014 and 2013 have been included. The components of costs of contract revenues include labor, equipment (including depreciation, maintenance, insurance and long-term rentals), subcontracts, fuel 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. Generally, capital projects have the highest margins due to the complexity of the projects, while coastal protection projects have the most volatile margins because they are most often exposed to variability in weather conditions. The Company’s cost structure includes significant annual equipment-related costs, including depreciation, maintenance, insurance and long-term rentals. These costs have averaged approximately 22% to 23% 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 four operating segments that, through aggregation, comprise two reportable segments: dredging and environmental & remediation, previously referred to as the demolition segment. The historical demolition business has been retrospectively presented as discontinued operations and is no longer reflected in continuing operations. Four operating segments were aggregated into two reportable segments as the segments have similarity in economic margins, services, production processes, customer types, distribution methods and regulatory environment. The Company has determined that the operating segments are the Company’s four reporting units. The Company performed its most recent annual test of impairment as of July 1, 2014 for the goodwill in both the dredging and environmental & remediation segments with no indication of goodwill impairment as of the test date. The Company will perform its next scheduled annual test of goodwill in the third quarter of 2015. 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 May 2014, the Financial Accounting Standards Board 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 is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period, which will be our first quarter of fiscal 2017. Early adoption is not permitted. We are currently evaluating the impact of ASU 2014-09 on our consolidated financial statements.

Earnings per share

9 Months Ended

Sep. 30, 2014

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 similar 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 three months ended September 30, 2014, the dilutive effect of 521 thousand shares of stock options and restricted stock units were excluded from the diluted weighted-average common shares outstanding as the Company incurred a loss during these periods. Additionally, for the three and nine months ended September 30, 2014, 664 thousand and 500 thousand shares, respectively, of stock options or 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 per share from continuing operations are as follows:


	Three Months Ended				Nine Months Ended
(shares in thousands)	September 30,				September 30,
	2014		2013		2014		2013
Income (loss) from continuing operations	$	(1,027)	$	6,576	$	400	$	15,107
Loss on discontinued operations, net of income taxes, attributable to Great Lakes Dredge & Dock Corporation		(1,059)		(5,128)		(9,118)		(38,467)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation		(2,086)		1,448		(8,718)		(23,360)

Weighted-average common shares outstanding — basic		60,040		59,526		59,870		59,444
Effect of stock options and restricted stock units		-		556		621		556

Weighted-average common shares outstanding — diluted		60,040		60,082		60,491		60,000

Earnings (loss) per share from continuing operations — basic	$	(0.01)	$	0.11	$	0.01	$	0.25
Earnings (loss) per share from continuing operations — diluted	$	(0.01)	$	0.11	$	0.01	$	0.25

Accounts Receivable And Contracts In Progress

9 Months Ended

Sep. 30, 2014

Accounts Receivable And Contracts In Progress [Abstract]

Accounts Receivables And Contracts In Progress

3. Accounts receivable and contracts in progress

Accounts receivable at September 30, 2014 and December 31, 2013 are as follows:


	September 30,		December 31,
	2014		2013
Completed contracts	$	12,718	$	17,361
Contracts in progress		71,402		62,177
Retainage		16,450		18,506
		100,570		98,044
Allowance for doubtful accounts		(1,529)		(1,529)

Total accounts receivable—net	$	99,041	$	96,515

Current portion of accounts receivable—net	$	98,118	$	96,515
Long-term accounts receivable and retainage		923		-
Total accounts receivable—net	$	99,041	$	96,515

The components of contracts in progress at September 30, 2014 and December 31, 2013 are as follows:


	September 30,		December 31,
	2014		2013
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	737,986	$	435,470
Amounts billed		(660,952)		(370,730)
Costs and earnings in excess of billings for contracts in progress		77,034		64,740

Costs and earnings in excess of billings for completed contracts		8,594		2,692

Total contract revenues in excess of billings	$	85,628	$	67,432

Billings in excess of costs and earnings:
Amounts billed	$	(175,854)	$	(156,794)
Costs and earnings for contracts in progress		170,876		150,040

Total billings in excess of contract revenues	$	(4,978)	$	(6,754)

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Accrued Expenses

9 Months Ended

Sep. 30, 2014

Accrued Expenses [Abstract]

Accrued Expenses

4. Accrued expenses

Accrued expenses at September 30, 2014 and December 31, 2013 are as follows:


	September 30,		December 31,
	2014		2013

Insurance	$	13,219	$	8,649
Payroll and employee benefits		8,406		13,664
Income and other taxes		4,803		3,709
Interest		3,309		8,066
Percentage of completion adjustment		451		2,135
Other		19,567		2,308
Total accrued expenses	$	49,755	$	38,531

Long-term Debt	9 Months Ended
Long-term Debt	Sep. 30, 2014
Long-term Debt [Abstract]
Long-Term Debt	5. Long-term debt On June 4, 2012, the Company entered into a senior revolving credit agreement (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, as subsequently amended, provides for a senior revolving credit facility in an aggregate principal amount of up to $210,000, 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 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. On September 15, 2014, the Company entered into the fifth amendment (the “Fifth Amendment”) to the Credit Agreement which exercised a portion of the incremental loans feature of the Credit Agreement that allowed the Company to increase the aggregate revolving commitment. A new lender provided an incremental commitment of $35,000 increasing the aggregate revolving commitment to $210,000. Additionally, the Fifth Amendment allowed full use of the aggregate revolving commitment for the issuance of letters of credit and decreasing the required ratio of aggregate orderly liquidation value of pledged collateral from 1.5 times to 1.27 times the aggregate revolving commitment. The Fifth Amendment further amended the Credit Agreement to secured and collateralized by perfected liens on certain of the Company’s vessels and its domestic accounts receivable, subject to permitted liens and prior interests of other parties. In connection with the Company’s entry into the Fifth Amendment, Zurich American Insurance Company, the Company’s surety provider, secured permitted second mortgages on the same vessels securing the obligations under the Credit Agreement. Depending on the Company’s consolidated leverage ratio (as defined in the Credit Agreement), borrowings under the revolving credit facility will bear interest at the option of the Company of either a LIBOR rate plus a margin of between 1.50% to 2.50% per annum or a base rate plus a margin of between 0.50% to 1.50% per annum. The credit facility 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 net leverage ratio less than or equal to 4.50 to 1.00 as of the end of each fiscal quarter and 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, 2014, the Company had $35,000 of borrowings on the revolver and $117,761 of letters of credit outstanding, resulting in $57,239 of availability under the Credit Agreement. At September 30, 2014, the Company was in compliance with its various financial covenants under its Credit Agreement. On September 15, 2014, the Company terminated its $24,000 international letter of credit facility with Wells Fargo Bank, National Association, as successor by merger to Wells Fargo HSBC Trade Bank, as amended. On the date of termination, there were no letters of credit or other indebtedness outstanding under this facility, and the loan documents providing for the facility, and the liens and security interests securing it, were terminated and released. At September 30, 2014, the Company also had $250,000 of 7.375% senior notes outstanding, which mature in February 2019. Subsequent to September 30, 2014, the Company entered into transactions affecting its long-term debt. See Note 12.

Fair Value Measurements

9 Months Ended

Sep. 30, 2014

Fair Value Measurements [Abstract]

Fair Value Measurements

6. 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 and commodity price risk. The Company does not hold or issue derivatives for speculative or trading purposes. In addition, other nonfinancial assets and liabilities are measured at fair value in the financial statements on a nonrecurring basis. The fair values of these financial instruments and nonfinancial assets and liabilities measured at the reporting date are summarized as follows:


				Fair Value Measurements at Reporting Date Using
Description	At September 30, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	1,051	$	-	$	1,051	$	-


				Fair Value Measurements at Reporting Date Using
Description	At December 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	332	$	-	$	332	$	-

Foreign exchange contracts

The Company has exposure to foreign currencies that fluctuate in relation to the U.S. dollar. The Company periodically enters into foreign exchange forward contracts to hedge this risk. At September 30, 2014 and December 31, 2013, there were no outstanding contracts.

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 backlog.

As of September 30, 2014, 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 August 2015. As of September 30, 2014, there were 4.1 million gallons remaining on these contracts which represent approximately 80% of the Company’s forecasted fuel purchases through August 2015. Under these swap agreements, the Company will pay fixed prices ranging from $2.86 to $3.01 per gallon.

At September 30, 2014, the fair value liability of the fuel hedge contracts was estimated to be $1,051 and is recorded in accrued expenses. The gain reclassified to earnings from changes in fair value of derivatives, net of cash settlements and taxes, for the nine months ended September 30, 2014 was $332. 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 fair value of the fuel hedge contracts outstanding as of September 30, 2014 and December 31, 2013 is as follows:


		Fair Value at
		September 30,		December 31,
	Balance Sheet Location	2014		2013
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	-	$	332

Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	1,051	$	-

Accumulated other comprehensive 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,
	2014		2013		2014		2013
Cumulative translation adjustments—net of tax	$	(416)	$	(51)	$	(389)	$	(131)
Derivatives:
Reclassification of derivative (gains) losses to earnings—net of tax		(306)		(53)		(332)		237
Change in fair value of derivatives—net of tax		136		(35)		132		(359)
Net unrealized gain on derivatives—net of tax		(169)		(88)		(199)		(122)
Total other comprehensive loss	$	(585)	$	(139)	$	(588)	$	(253)

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	2014		2013		2014		2013
Derivatives:
Fuel hedge contracts	Costs of contract revenues	$	(241)	$	(88)	$	(286)	$	395
	Income tax (provision) benefit		65		(35)		46		158
		$	(306)	$	(53)	$	(332)	$	237

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 the timing of the cash flows and comparison to current market interest rates, the carrying value of our senior revolving credit agreement approximates fair value. In January 2011, the Company issued $250,000 of 7.375% senior notes due February 1, 2019, which were outstanding at September 30, 2014. 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 $256,875 at September 30, 2014, which is a Level 1 fair value measurement as the senior notes value was obtained using quoted prices in active markets.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Share-Based Compensation	9 Months Ended
Share-Based Compensation	Sep. 30, 2014
Share-based compensation[Abstract]
Share-based Compensation	7. 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 May 2014, the Company granted 337 thousand options to purchase shares of common stock and 182 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 $828 and $1,816, respectively, for the three and nine months ended September 30, 2014 and $1,000 and $2,452 for the three and nine months ended September 30, 2013, respectively.

Commitments And Contingencies	9 Months Ended
Commitments And Contingencies	Sep. 30, 2014
Commitments And Contingencies [Abstract]
Commitments And Contingencies	8. Commitments and contingencies Commercial commitments Performance and bid bonds are customarily required for dredging and marine construction projects, as well as some environmental & remediation 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 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, 2014, the Company had outstanding performance bonds totaling approximately $822,283, of which $49,613 relates to projects accounted for in discontinued operations. The revenue value remaining in backlog related to the projects of continuing operations totaled approximately $603,748. 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 March 19, 2013, the Company and three of its current and former executives were sued in a securities class action in the Northern District of Illinois captioned United Union of Roofers, Waterproofers & Allied Workers Local Union No. 8 v. Great Lakes Dredge & Dock Corporation et al., Case No. 1:13-cv-02115. The lawsuit, which was brought on behalf of all purchasers of the Company’s securities between August 7, 2012 and March 14, 2013, primarily alleges that the defendants made false and misleading statements regarding the recognition of revenue in the demolition segment and with regard to the Company’s internal control over financial reporting. This suit was filed following the Company’s announcement on March 14, 2013 that it would restate its second and third quarter 2012 financial statements. Two additional, similar lawsuits captioned Boozer v. Great Lakes Dredge & Dock Corporation et al., Case No. 1:13-cv-02339, and Connors v. Great Lakes Dredge & Dock Corporation et al., Case No. 1:13-cv-02450, were filed in the Northern District of Illinois on March 28, 2013, and April 2, 2013, respectively. These three actions were consolidated and recaptioned In re Great Lakes Dredge & Dock Corporation Securities Litigation, Case No. 1:13-cv-02115, on June 10, 2013. The plaintiffs filed an amended class action complaint on August 9, 2013, which the defendants moved to dismiss on October 8, 2013. After briefing and oral argument by the parties, the Court entered an order on October 21, 2014 denying that motion to dismiss. The Company denies liability and intends to vigorously defend this action. On March 28, 2013, the Company was named as a nominal defendant, and its directors were named as defendants, in a shareholder derivative action in DuPage County Circuit Court in Illinois captioned Hammoud v. Berger et al., Case No. 2013CH001110. The lawsuit primarily alleges breaches of fiduciary duties related to allegedly false and misleading statements regarding the recognition of revenue in the demolition segment and with regard to the Company’s internal control over financial reporting, which exposed the Company to securities litigation. A second, similar lawsuit captioned The City of Haverhill Retirement System v. Leight et al., Case No. 1:13-cv-02470, was filed in the Northern District of Illinois on April 2, 2013 and was voluntarily dismissed on June 10, 2013. A third, similar lawsuit captioned St. Lucie County Fire District Firefighters Pension Trust Fund v. Leight et al., Case No. 13 CH 15483, was filed in Cook County Circuit Court in Illinois on July 8, 2013, and has since been transferred to DuPage County Circuit Court and consolidated with the Hammoud action. The Hammoud/St. Lucie plaintiffs have filed a consolidated amended complaint on December 9, 2013, but the action was otherwise stayed pending a ruling on the motion to dismiss the securities class action. A fourth, similar lawsuit (that additionally named one current and one former executive as defendants) captioned Griffin v. Berger et al., Case No. 1:13-cv-04907, was filed in the Northern District of Illinois on July 9, 2013. The Griffin action was also stayed pending a ruling on the motion to dismiss the securities class action. The parties have agreed to continue to stay these matters until early December 2014. As discussed in Note 10, on April 23, 2014, the Company completed the sale of NASDI, LLC (“NASDI”) and Yankee Environmental Services, LLC, 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 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. Should a claim be brought, the Company intends to defend this matter vigorously. In 2011, NASDI received a subpoena from a federal grand jury in the District of Massachusetts directing NASDI to furnish certain documents relating to certain projects performed by NASDI since January 2005. The Company conducted an internal investigation into this matter and has cooperated with the grand jury’s investigation. Based on the limited information known to the Company, the Company cannot predict the outcome of the investigation, the U.S. Attorney’s views of the issues being investigated, and any action the U.S. Attorney may take. On April 24, 2014, NASDI received a subpoena from a federal grand jury in the District of Massachusetts directing NASDI to furnish certain emails for the years 2004 to the present for the email accounts of certain former and present NASDI employees. The Company is cooperating with the grand jury’s investigation. Based on the limited information known to the Company, the Company cannot predict the outcome of the investigation, the U.S. Attorney’s views of the issues being investigated, and any action the U.S. Attorney may take.

Investments

9 Months Ended

Sep. 30, 2014

Investments [Abstract]

Investments

9. 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. The Company has begun the discussion with its joint venture partner in TerraSea regarding the winddown of operations and liquidation of the investments.

The Company accounts for this investment under the equity method. The following is summarized financial information for this entity:


	Nine Months Ended
	September 30,
	2014		2013
Revenue	$	5,853	$	4,424
Gross profit		(15,241)		(714)
Loss from continuing operations		(16,110)		(1,608)
Net Loss		(16,110)		(1,608)

Business Dispositions

9 Months Ended

Sep. 30, 2014

Business Dispositions [Abstract]

Business Combinations And Reorganizations

10. Business dispositions

On April 23, 2014, the Company entered into an agreement and completed the sale of NASDI, LLC and Yankee Environmental Services, LLC, its two former subsidiaries that comprised the 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, and 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, which is subject to change based upon subsequent adjustments to the purchase price related to additional proceeds.

The results of the businesses have been reported in discontinued operations as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013

Revenue	$	-	$	10,964	$	14,439	$	25,396

Loss before income taxes from discontinued operations	$	(1,053)	$	(7,687)	$	(18,393)	$	(48,608)
Income tax (provision) benefit		(6)		2,377		9,275		9,990
Loss from discontinued operations, net of income taxes	$	(1,059)	$	(5,310)	$	(9,118)	$	(38,618)

Segment Information

9 Months Ended

Sep. 30, 2014

Segment Information [Abstract]

Segment Information

11. Segment information

The Company and its subsidiaries currently operate in two reportable segments: dredging and environmental & remediation. 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,
	2014		2013		2014		2013
Dredging
Contract revenues	$	167,079	$	155,469	$	486,153	$	465,915
Operating income		5,733		13,129		24,157		46,698

Environmental & remediation
Contract revenues	$	37,182	$	36,114	$	79,224	$	53,215
Operating income (loss)		2,274		800		(2,996)		(6,643)

Intersegment revenues	$	(2,063)	$	(3,721)		(4,088)		(3,990)
Total
Contract revenues	$	202,198	$	187,862	$	561,289	$	515,140
Operating income		8,007		13,929		21,161		40,055

Foreign dredging revenue of $40,040 and $85,691 for the three and nine months ended September 30, 2014, respectively, was primarily attributable to work on the Wheatstone LNG project in Western Australia as well as work done in Brazil and the Middle East. Foreign dredging revenue for the three and nine months ended September 30, 2013 was $32,651 and $104,384, respectively.

During the nine months ended September 30, 2014, the Company earned significant revenue from a large, single customer foreign contract. As a result of the successful resolution of contingencies with the customer, a revision to the estimated gross profit percentage was recorded in the period. The cumulative net impact of this change increased gross profit by $12,423 for the three months ended September 30, 2014. Due to uncertainties inherent in estimations, the Company could record further revisions to our gross profit percentage on this contract as it is completed.

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.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 10
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Paragraph 29
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

+ Details

Subsidiary Guarantors

9 Months Ended

Sep. 30, 2014

Subsidiary Guarantors [Abstract]

Subsidiary Guarantors

13. Subsidiary guarantors

The Company’s long-term debt at September 30, 2014 includes $250,000 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, 2014 and December 31, 2013;


	(ii)	statements of operations and comprehensive loss for the three and nine months ended September 30, 2014 and 2013; and

(iii)

statements of cash flows for the nine months ended September 30, 2014 and 2013.

Certain amounts included in the following condensed consolidating statements of cash flows for the nine months ended September 30, 2013 have been revised to conform with current year presentation reflecting intercompany borrowings and payments as either investing or financing activities.


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF SEPTEMBER 30, 2014
(In thousands)

ASSETS	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	18,212	$	2,873	$	3	$	-	$	21,088
Accounts receivable — net		98,118		-		-		-		98,118
Receivables from affiliates		164,731		3,561		33,406		(201,698)		-
Contract revenues in excess of billings		82,717		2,911		-		-		85,628
Inventories		33,194		-		-		-		33,194
Prepaid expenses and other current assets		60,207		875		(2,642)		-		58,440
Total current assets		457,179		10,220		30,767		(201,698)		296,468

PROPERTY AND EQUIPMENT—Net		382,325		6		-		-		382,331
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		80,885		-		-		-		80,885
INVENTORIES — Noncurrent		37,324		-		-		-		37,324
INVESTMENTS IN JOINT VENTURES		8,445		-		-		-		8,445
INVESTMENTS IN SUBSIDIARIES		3,722		-		594,364		(598,086)		-
OTHER		7,409		3		4,333		-		11,745
TOTAL	$	977,289	$	10,229	$	629,464	$	(799,784)	$	817,198

LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	138,137	$	903	$	301	$	-	$	139,341
Payables to affiliates		175,587		12,327		13,784		(201,698)		-
Accrued expenses		45,663		221		3,871		-		49,755
Billings in excess of contract revenues		4,978		-		-		-		4,978
Current portion of long term debt		373		-		-		-		373
Total current liabilities		364,738		13,451		17,956		(201,698)		194,447

7 3/8% SENIOR NOTES		-		-		250,000		-		250,000
REVOLVING CREDIT FACILITY		-		-		35,000		-		35,000
LONG TERM NOTE PAYABLE		485		-		-		-		485
DEFERRED INCOME TAXES		(363)		-		90,403		-		90,040
OTHER		11,121		-		551		-		11,672
Total liabilities		375,981		13,451		393,910		(201,698)		581,644

Total Great Lakes Dredge & Dock Corporation Equity		601,308		(3,222)		235,554		(598,086)		235,554
NONCONTROLLING INTERESTS		-		-		-		-		-
TOTAL EQUITY		601,308		(3,222)		235,554		(598,086)		235,554
TOTAL	$	977,289	$	10,229	$	629,464	$	(799,784)	$	817,198


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF DECEMBER 31, 2013
(In thousands)

ASSETS	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	71,939	$	3,399	$	-	$	-	$	75,338
Accounts receivable — net		95,476		1,039		-		-		96,515
Receivables from affiliates		131,984		7,337		12,205		(151,526)		-
Contract revenues in excess of billings		63,591		3,841		-		-		67,432
Inventories		32,500		-		-		-		32,500
Prepaid expenses and other current assets		23,549		137		20,478		-		44,164
Assets held for sale		41,763		11,877		-		(8,536)		45,104
Total current assets		460,802		27,630		32,683		(160,062)		361,053

PROPERTY AND EQUIPMENT—Net		345,612		8		-		-		345,620
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		81,302		-		-		-		81,302
INVENTORIES — Noncurrent		38,496		-		-		-		38,496
INVESTMENTS IN JOINT VENTURES		8,256		-		-		-		8,256
INVESTMENTS IN SUBSIDIARIES		1,212		-		638,955		(640,167)		-
ASSETS HELD FOR SALE—Noncurrent		8,796		60		-		-		8,856
OTHER		3,886		3		5,193		(20)		9,062
TOTAL	$	948,362	$	27,701	$	676,831	$	(800,249)	$	852,645

LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	115,235	$	754	$	132	$	-	$	116,121
Payables to affiliates		96,270		24,862		30,394		(151,526)		-
Accrued expenses		28,086		15		10,430		-		38,531
Billings in excess of contract revenues		6,754		-		-		-		6,754
Current portion of long term debt		-		-		-		-		-
Liabilities held for sale		38,158		2,871		-		(8,536)		32,493
Total current liabilities		284,503		28,502		40,956		(160,062)		193,899

7 3/8% SENIOR NOTES		-		-		250,000		-		250,000
REVOLVING CREDIT FACILITY		-		-		35,000		-		35,000
DEFERRED INCOME TAXES		-		-		108,531		(20)		108,511
LIABILITIES HELD FOR SALE—Noncurrent		1,212		-		-		-		1,212
OTHER		21,679		-		243		-		21,922
Total liabilities		307,394		28,502		434,730		(160,082)		610,544

Total Great Lakes Dredge & Dock Corporation Equity		640,968		(801)		242,946		(640,167)		242,946
NONCONTROLLING INTERESTS		-		-		(845)		-		(845)
TOTAL EQUITY		640,968		(801)		242,101		(640,167)		242,101
TOTAL	$	948,362	$	27,701	$	676,831	$	(800,249)	$	852,645


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	198,934	$	3,264	$	-	$	-	$	202,198
Costs of contract revenues		(170,911)		(6,828)		-		-		(177,739)
Gross profit		28,023		(3,564)		-		-		24,459

OPERATING EXPENSES:
General and administrative expenses		15,988		1		73		-		16,062
Loss on sale of assets—net		390		-		-		-		390
Operating income (loss)		11,645		(3,565)		(73)		-		8,007

Interest expense—net		(60)		-		(4,642)		-		(4,702)
Equity in earnings of subsidiaries		54		-		3,316		(3,370)		-
Equity in loss of joint ventures		(5,785)		-		-		-		(5,785)
Other income		384		-		-		-		384


Income (loss) from continuing operations before income taxes		6,238		(3,565)		(1,399)		(3,370)		(2,096)

Income tax benefit		697		-		372		-		1,069

Income (loss) from continuing operations		6,935		(3,565)		(1,027)		(3,370)		(1,027)
Loss from discontinued operations, net of income taxes		(1,059)		-		(1,059)		1,059		(1,059)
Net income (loss)		5,876		(3,565)		(2,086)		(2,311)		(2,086)
Net (income) loss attributable to noncontrolling interest		-		-		-		-		-
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	5,876	$	(3,565)	$	(2,086)	$	(2,311)	$	(2,086)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	5,707	$	(3,981)	$	(2,671)	$	(1,726)	$	(2,671)


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	179,514	$	8,348	$	-	$	-	$	187,862
Costs of contract revenues		(149,966)		(10,060)		-		-		(160,026)
Gross profit		29,548		(1,712)		-		-		27,836

OPERATING EXPENSES:
General and administrative expenses		17,121		-		-		-		17,121
Proceeds from loss of use claim		-		-		-		-		-
Gain on sale of assets—net		(3,214)		-		-		-		(3,214)
Operating income (loss)		15,641		(1,712)		-		-		13,929

Interest expense—net		(65)		(71)		(5,406)		-		(5,542)
Equity in earnings of subsidiaries		304		-		12,711		(13,015)		-
Equity in earnings of joint ventures		1,427		-		-		-		1,427
Other income (expense)		(187)		9		-		-		(178)

Income (loss) from continuing operations before income taxes		17,120		(1,774)		7,305		(13,015)		9,636

Income tax provision		(2,331)		-		(729)		-		(3,060)

Income (loss) from continuing operations		14,789		(1,774)		6,576		(13,015)		6,576
Loss from discontinued operations, net of income taxes		(5,310)		(198)		(5,310)		5,508		(5,310)
Net income (loss)		9,479		(1,972)		1,266		(7,507)		1,266
Net loss attributable to noncontrolling interest		-		-		182		-		182
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation		9,479		(1,972)		1,448		(7,507)		1,448


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	9,391	$	(2,023)	$	1,309	$	(7,368)	$	1,309


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	540,199	$	21,090	$	-	$	-	$	561,289
Costs of contract revenues		(463,718)		(26,002)		-		-		(489,720)
Gross profit		76,481		(4,912)		-		-		71,569

OPERATING EXPENSES:
General and administrative expenses		49,776		1		73		-		49,850
Proceeds from loss of use claim		-		-		-		-		-
Loss on sale of assets—net		558		-		-		-		558
Operating income (loss)		26,147		(4,913)		(73)		-		21,161

Interest expense—net		91		(261)		(14,560)		-		(14,730)
Equity in earnings (loss) of subsidiaries		(52)		-		15,915		(15,863)		-
Equity in loss of joint ventures		(9,063)		-		-		-		(9,063)
Gain on bargain purchase acquisition		2,197		-		-		-		2,197
Other income		403		7		-		-		410

Income (loss) from continuing operations before income taxes		19,723		(5,167)		1,282		(15,863)		(25)

Income tax (provision) benefit		1,307		-		(882)		-		425

Income (loss) from continuing operations		21,030		(5,167)		400		(15,863)		400
Loss from discontinued operations, net of income taxes		(9,118)		(1,343)		(9,118)		10,461		(9,118)
Net income (loss)		11,912		(6,510)		(8,718)		(5,402)		(8,718)
Net (income) loss attributable to noncontrolling interest		-		-		-		-		-
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	11,912	$	(6,510)	$	(8,718)	$	(5,402)	$	(8,718)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	11,713	$	(6,899)	$	(9,306)	$	(4,814)	$	(9,306)


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	497,486	$	17,654	$	-	$	-	$	515,140
Costs of contract revenues		(422,764)		(20,034)		-		-		(442,798)
Gross profit		74,722		(2,380)		-		-		72,342

OPERATING EXPENSES:
General and administrative expenses		48,695		5		-		-		48,700
Proceeds from loss of use claim		(13,272)		-		-		-		(13,272)
Gain on sale of assets—net		(3,141)		-		-		-		(3,141)
Operating income (loss)		42,440		(2,385)		-		-		40,055

Interest expense—net		(214)		(160)		(16,297)		-		(16,671)
Equity in earnings of subsidiaries		306		-		39,777		(40,083)		-
Equity in earnings of joint ventures		452		-		-		-		452
Other expense		(55)		(348)		-		-		(403)

Income (loss) from continuing operations before income taxes		42,929		(2,893)		23,480		(40,083)		23,433

Income tax (provision) benefit		45		2		(8,373)		-		(8,326)

Income (loss) from continuing operations		42,974		(2,891)		15,107		(40,083)		15,107
Loss from discontinued operations, net of income taxes		(38,618)		(265)		(38,618)		38,883		(38,618)
Net income (loss)		4,356		(3,156)		(23,511)		(1,200)		(23,511)
Net loss attributable to noncontrolling interest		-		-		151		-		151
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	4,356	$	(3,156)	$	(23,360)	$	(1,200)	$	(23,360)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	4,234	$	(3,287)	$	(23,613)	$	(947)	$	(23,613)


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	$	24,488	$	(3,357)	$	(5,840)	$	-	$	15,291
Net cash flows used in operating activities of discontinued operations		(4,000)		(1,024)		-		-		(5,024)
Cash provided by (used in) operating activities		20,488		(4,381)		(5,840)		-		10,267

INVESTING ACTIVITIES:
Purchases of property and equipment		(66,433)		-		-		-		(66,433)
Proceeds from dispositions of property and equipment		1,614		-		-		-		1,614
Payments on vendor performance obligations		(3,100)		-		-		-		(3,100)
Payments for acquisitions of businesses		(2,048)		-		-		-		(2,048)
Net change in accounts with affiliates		(9,402)		-		-		9,402		-
Net cash flows used in investing activities of continuing operations		(79,369)		-		-		9,402		(69,967)
Net cash flows provided by investing activities of discontinued operations		5,275		-		-		-		5,275
Cash used in investing activities		(74,094)		-		-		9,402		(64,692)

FINANCING ACTIVITIES:
Deferred financing fees		-		-		(845)		-		(845)
Taxes paid on settlement of vested share awards		-		-		(501)		-		(501)
Repayments of equipment debt		(121)		-		-		-		(121)
Purchase of noncontrolling interest		-		-		(205)		-		(205)
Net change in accounts with affiliates		-		3,595		5,807		(9,402)		-
Exercise of options and purchases from employee stock plans		-		-		1,542		-		1,542
Excess income tax benefit from share-based compensation		-		-		45		-		45
Borrowings under revolving loans		-		-		105,000		-		105,000
Repayments of revolving loans		-		-		(105,000)		-		(105,000)

Net cash flows provided by (used in) financing activities of continuing operations		(121)		3,595		5,843		(9,402)		(85)
Net cash flows provided by (used in) financing activities of discontinued operations		-		-		-		-		-
Cash provided by (used in) financing activities		(121)		3,595		5,843		(9,402)		(85)

Effect of foreign currency exchange rates on cash and cash equivalents		-		260		-		-		260

Net increase (decrease) in cash and cash equivalents		(53,727)		(526)		3		-		(54,250)

Cash and cash equivalents at beginning of period		71,939		3,399		-		-		75,338

Cash and cash equivalents at end of period	$	18,212	$	2,873	$	3	$	-	$	21,088


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	$	47,543	$	(6,776)	$	(29,542)	$	-	$	11,225
Net cash flows used in operating activities of discontinued operations		(8,054)		(437)		-		-		(8,491)
Cash provided by (used in) operating activities		39,489		(7,213)		(29,542)		-		2,734

INVESTING ACTIVITIES:
Purchases of property and equipment		(37,968)		-		-		-		(37,968)
Proceeds from dispositions of property and equipment		4,194		-		-		-		4,194
Proceeds from vendor performance obligations		13,600		-		-		-		13,600
Net change in accounts with affiliates		(5,309)		-		-		5,309		-

Net cash flows used in investing activities of continuing operations		(25,483)		-		-		5,309		(20,174)
Net cash flows used in investing activities of discontinued operations		(149)		-		-		-		(149)
Cash used in investing activities		(25,632)		-		-		5,309		(20,323)

FINANCING ACTIVITIES:
Repayments of long term note payable		-		-		(10,547)		-		(10,547)
Taxes paid on settlement of vested share awards		-		-		(305)		-		(305)
Repayment of equipment debt		(6)		-		-		-		(6)
Net change in accounts with affiliates		-		9,700		(4,391)		(5,309)		-
Exercise of options and purchases from employee stock plans		-		-		581		-		581
Excess income tax benefit from share-based compensation		-		-		133		-		133
Borrowings under revolving loans		-		-		194,500		-		194,500
Repayments of revolving loans		-		-		(149,500)		-		(149,500)
Capital contributions		-		926		(926)		-		-

Net cash flows provided by (used in) financing activities of continuing operations		(6)		10,626		29,545		(5,309)		34,856
Net cash flows used in financing activities of discontinued operations		(36)		-		(3)		-		(39)
Cash provided by (used in) financing activities		(42)		10,626		29,542		(5,309)		34,817

Effect of foreign currency exchange rates on cash and cash equivalents		-		(346)		-		-		(346)

Net increase in cash and cash equivalents		13,815		3,067		-		-		16,882

Cash and cash equivalents at beginning of period		24,272		168		-		-		24,440

Cash and cash equivalents at end of period	$	38,087	$	3,235	$	-	$	-	$	41,322

Earnings per share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings per share [Abstract]

Computations For Basic And Diluted Earnings Per Share


	Three Months Ended				Nine Months Ended
(shares in thousands)	September 30,				September 30,
	2014		2013		2014		2013
Income (loss) from continuing operations	$	(1,027)	$	6,576	$	400	$	15,107
Loss on discontinued operations, net of income taxes, attributable to Great Lakes Dredge & Dock Corporation		(1,059)		(5,128)		(9,118)		(38,467)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation		(2,086)		1,448		(8,718)		(23,360)

Weighted-average common shares outstanding — basic		60,040		59,526		59,870		59,444
Effect of stock options and restricted stock units		-		556		621		556

Weighted-average common shares outstanding — diluted		60,040		60,082		60,491		60,000

Earnings (loss) per share from continuing operations — basic	$	(0.01)	$	0.11	$	0.01	$	0.25
Earnings (loss) per share from continuing operations — diluted	$	(0.01)	$	0.11	$	0.01	$	0.25

Accounts Receivable And Contracts In Progress (Tables)

9 Months Ended

Sep. 30, 2014

Accounts Receivable And Contracts In Progress [Abstract]

Schedule Of Accounts Receivable


	September 30,		December 31,
	2014		2013
Completed contracts	$	12,718	$	17,361
Contracts in progress		71,402		62,177
Retainage		16,450		18,506
		100,570		98,044
Allowance for doubtful accounts		(1,529)		(1,529)

Total accounts receivable—net	$	99,041	$	96,515

Current portion of accounts receivable—net	$	98,118	$	96,515
Long-term accounts receivable and retainage		923		-
Total accounts receivable—net	$	99,041	$	96,515

Components Of Contracts In Progress


	September 30,		December 31,
	2014		2013
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	737,986	$	435,470
Amounts billed		(660,952)		(370,730)
Costs and earnings in excess of billings for contracts in progress		77,034		64,740

Costs and earnings in excess of billings for completed contracts		8,594		2,692

Total contract revenues in excess of billings	$	85,628	$	67,432

Billings in excess of costs and earnings:
Amounts billed	$	(175,854)	$	(156,794)
Costs and earnings for contracts in progress		170,876		150,040

Total billings in excess of contract revenues	$	(4,978)	$	(6,754)

Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2014

Accrued Expenses [Abstract]

Accrued Expenses


	September 30,		December 31,
	2014		2013

Insurance	$	13,219	$	8,649
Payroll and employee benefits		8,406		13,664
Income and other taxes		4,803		3,709
Interest		3,309		8,066
Percentage of completion adjustment		451		2,135
Other		19,567		2,308
Total accrued expenses	$	49,755	$	38,531

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Measurements [Abstract]

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


				Fair Value Measurements at Reporting Date Using
Description	At September 30, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	1,051	$	-	$	1,051	$	-


				Fair Value Measurements at Reporting Date Using
Description	At December 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Fuel hedge contracts	$	332	$	-	$	332	$	-

Schedule Fair Value Measurements Balance Sheet Location


		Fair Value at
		September 30,		December 31,
	Balance Sheet Location	2014		2013
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	-	$	332

Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	1,051	$	-

Changes In Components Of Accumulated other comprehensive loss (Table)


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Cumulative translation adjustments—net of tax	$	(416)	$	(51)	$	(389)	$	(131)
Derivatives:
Reclassification of derivative (gains) losses to earnings—net of tax		(306)		(53)		(332)		237
Change in fair value of derivatives—net of tax		136		(35)		132		(359)
Net unrealized gain on derivatives—net of tax		(169)		(88)		(199)		(122)
Total other comprehensive loss	$	(585)	$	(139)	$	(588)	$	(253)

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	Statement of Operations Location	2014		2013		2014		2013
Derivatives:
Fuel hedge contracts	Costs of contract revenues	$	(241)	$	(88)	$	(286)	$	395
	Income tax (provision) benefit		65		(35)		46		158
		$	(306)	$	(53)	$	(332)	$	237

Investments (Tables)

9 Months Ended

Sep. 30, 2014

Investments [Abstract]

Schedule Of Investments


	Nine Months Ended
	September 30,
	2014		2013
Revenue	$	5,853	$	4,424
Gross profit		(15,241)		(714)
Loss from continuing operations		(16,110)		(1,608)
Net Loss		(16,110)		(1,608)

Business Dispositions (Tables)

9 Months Ended

Sep. 30, 2014

Business Dispositions [Abstract]

Schedule Of Discontinued Operation


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013

Revenue	$	-	$	10,964	$	14,439	$	25,396

Loss before income taxes from discontinued operations	$	(1,053)	$	(7,687)	$	(18,393)	$	(48,608)
Income tax (provision) benefit		(6)		2,377		9,275		9,990
Loss from discontinued operations, net of income taxes	$	(1,059)	$	(5,310)	$	(9,118)	$	(38,618)

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Segment Information (Tables)

9 Months Ended

Sep. 30, 2014

Segment Information [Abstract]

Segment Reporting By Segment


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Dredging
Contract revenues	$	167,079	$	155,469	$	486,153	$	465,915
Operating income		5,733		13,129		24,157		46,698

Environmental & remediation
Contract revenues	$	37,182	$	36,114	$	79,224	$	53,215
Operating income (loss)		2,274		800		(2,996)		(6,643)

Intersegment revenues	$	(2,063)	$	(3,721)		(4,088)		(3,990)
Total
Contract revenues	$	202,198	$	187,862	$	561,289	$	515,140
Operating income		8,007		13,929		21,161		40,055

Subsidiary Guarantors (Tables)

9 Months Ended

Sep. 30, 2014

Subsidiary Guarantors [Abstract]

Condensed Consolidating of Balance Sheet


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF SEPTEMBER 30, 2014
(In thousands)

ASSETS	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	18,212	$	2,873	$	3	$	-	$	21,088
Accounts receivable — net		98,118		-		-		-		98,118
Receivables from affiliates		164,731		3,561		33,406		(201,698)		-
Contract revenues in excess of billings		82,717		2,911		-		-		85,628
Inventories		33,194		-		-		-		33,194
Prepaid expenses and other current assets		60,207		875		(2,642)		-		58,440
Total current assets		457,179		10,220		30,767		(201,698)		296,468

PROPERTY AND EQUIPMENT—Net		382,325		6		-		-		382,331
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		80,885		-		-		-		80,885
INVENTORIES — Noncurrent		37,324		-		-		-		37,324
INVESTMENTS IN JOINT VENTURES		8,445		-		-		-		8,445
INVESTMENTS IN SUBSIDIARIES		3,722		-		594,364		(598,086)		-
OTHER		7,409		3		4,333		-		11,745
TOTAL	$	977,289	$	10,229	$	629,464	$	(799,784)	$	817,198

LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	138,137	$	903	$	301	$	-	$	139,341
Payables to affiliates		175,587		12,327		13,784		(201,698)		-
Accrued expenses		45,663		221		3,871		-		49,755
Billings in excess of contract revenues		4,978		-		-		-		4,978
Current portion of long term debt		373		-		-		-		373
Total current liabilities		364,738		13,451		17,956		(201,698)		194,447

7 3/8% SENIOR NOTES		-		-		250,000		-		250,000
REVOLVING CREDIT FACILITY		-		-		35,000		-		35,000
LONG TERM NOTE PAYABLE		485		-		-		-		485
DEFERRED INCOME TAXES		(363)		-		90,403		-		90,040
OTHER		11,121		-		551		-		11,672
Total liabilities		375,981		13,451		393,910		(201,698)		581,644

Total Great Lakes Dredge & Dock Corporation Equity		601,308		(3,222)		235,554		(598,086)		235,554
NONCONTROLLING INTERESTS		-		-		-		-		-
TOTAL EQUITY		601,308		(3,222)		235,554		(598,086)		235,554
TOTAL	$	977,289	$	10,229	$	629,464	$	(799,784)	$	817,198


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING BALANCE SHEET
AS OF DECEMBER 31, 2013
(In thousands)

ASSETS	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals
CURRENT ASSETS:
Cash and cash equivalents	$	71,939	$	3,399	$	-	$	-	$	75,338
Accounts receivable — net		95,476		1,039		-		-		96,515
Receivables from affiliates		131,984		7,337		12,205		(151,526)		-
Contract revenues in excess of billings		63,591		3,841		-		-		67,432
Inventories		32,500		-		-		-		32,500
Prepaid expenses and other current assets		23,549		137		20,478		-		44,164
Assets held for sale		41,763		11,877		-		(8,536)		45,104
Total current assets		460,802		27,630		32,683		(160,062)		361,053

PROPERTY AND EQUIPMENT—Net		345,612		8		-		-		345,620
GOODWILL AND OTHER INTANGIBLE ASSETS—Net		81,302		-		-		-		81,302
INVENTORIES — Noncurrent		38,496		-		-		-		38,496
INVESTMENTS IN JOINT VENTURES		8,256		-		-		-		8,256
INVESTMENTS IN SUBSIDIARIES		1,212		-		638,955		(640,167)		-
ASSETS HELD FOR SALE—Noncurrent		8,796		60		-		-		8,856
OTHER		3,886		3		5,193		(20)		9,062
TOTAL	$	948,362	$	27,701	$	676,831	$	(800,249)	$	852,645

LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Accounts payable	$	115,235	$	754	$	132	$	-	$	116,121
Payables to affiliates		96,270		24,862		30,394		(151,526)		-
Accrued expenses		28,086		15		10,430		-		38,531
Billings in excess of contract revenues		6,754		-		-		-		6,754
Current portion of long term debt		-		-		-		-		-
Liabilities held for sale		38,158		2,871		-		(8,536)		32,493
Total current liabilities		284,503		28,502		40,956		(160,062)		193,899

7 3/8% SENIOR NOTES		-		-		250,000		-		250,000
REVOLVING CREDIT FACILITY		-		-		35,000		-		35,000
DEFERRED INCOME TAXES		-		-		108,531		(20)		108,511
LIABILITIES HELD FOR SALE—Noncurrent		1,212		-		-		-		1,212
OTHER		21,679		-		243		-		21,922
Total liabilities		307,394		28,502		434,730		(160,082)		610,544

Total Great Lakes Dredge & Dock Corporation Equity		640,968		(801)		242,946		(640,167)		242,946
NONCONTROLLING INTERESTS		-		-		(845)		-		(845)
TOTAL EQUITY		640,968		(801)		242,101		(640,167)		242,101
TOTAL	$	948,362	$	27,701	$	676,831	$	(800,249)	$	852,645

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 THREE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	198,934	$	3,264	$	-	$	-	$	202,198
Costs of contract revenues		(170,911)		(6,828)		-		-		(177,739)
Gross profit		28,023		(3,564)		-		-		24,459

OPERATING EXPENSES:
General and administrative expenses		15,988		1		73		-		16,062
Loss on sale of assets—net		390		-		-		-		390
Operating income (loss)		11,645		(3,565)		(73)		-		8,007

Interest expense—net		(60)		-		(4,642)		-		(4,702)
Equity in earnings of subsidiaries		54		-		3,316		(3,370)		-
Equity in loss of joint ventures		(5,785)		-		-		-		(5,785)
Other income		384		-		-		-		384


Income (loss) from continuing operations before income taxes		6,238		(3,565)		(1,399)		(3,370)		(2,096)

Income tax benefit		697		-		372		-		1,069

Income (loss) from continuing operations		6,935		(3,565)		(1,027)		(3,370)		(1,027)
Loss from discontinued operations, net of income taxes		(1,059)		-		(1,059)		1,059		(1,059)
Net income (loss)		5,876		(3,565)		(2,086)		(2,311)		(2,086)
Net (income) loss attributable to noncontrolling interest		-		-		-		-		-
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	5,876	$	(3,565)	$	(2,086)	$	(2,311)	$	(2,086)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	5,707	$	(3,981)	$	(2,671)	$	(1,726)	$	(2,671)


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	179,514	$	8,348	$	-	$	-	$	187,862
Costs of contract revenues		(149,966)		(10,060)		-		-		(160,026)
Gross profit		29,548		(1,712)		-		-		27,836

OPERATING EXPENSES:
General and administrative expenses		17,121		-		-		-		17,121
Proceeds from loss of use claim		-		-		-		-		-
Gain on sale of assets—net		(3,214)		-		-		-		(3,214)
Operating income (loss)		15,641		(1,712)		-		-		13,929

Interest expense—net		(65)		(71)		(5,406)		-		(5,542)
Equity in earnings of subsidiaries		304		-		12,711		(13,015)		-
Equity in earnings of joint ventures		1,427		-		-		-		1,427
Other income (expense)		(187)		9		-		-		(178)

Income (loss) from continuing operations before income taxes		17,120		(1,774)		7,305		(13,015)		9,636

Income tax provision		(2,331)		-		(729)		-		(3,060)

Income (loss) from continuing operations		14,789		(1,774)		6,576		(13,015)		6,576
Loss from discontinued operations, net of income taxes		(5,310)		(198)		(5,310)		5,508		(5,310)
Net income (loss)		9,479		(1,972)		1,266		(7,507)		1,266
Net loss attributable to noncontrolling interest		-		-		182		-		182
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation		9,479		(1,972)		1,448		(7,507)		1,448


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	9,391	$	(2,023)	$	1,309	$	(7,368)	$	1,309


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	540,199	$	21,090	$	-	$	-	$	561,289
Costs of contract revenues		(463,718)		(26,002)		-		-		(489,720)
Gross profit		76,481		(4,912)		-		-		71,569

OPERATING EXPENSES:
General and administrative expenses		49,776		1		73		-		49,850
Proceeds from loss of use claim		-		-		-		-		-
Loss on sale of assets—net		558		-		-		-		558
Operating income (loss)		26,147		(4,913)		(73)		-		21,161

Interest expense—net		91		(261)		(14,560)		-		(14,730)
Equity in earnings (loss) of subsidiaries		(52)		-		15,915		(15,863)		-
Equity in loss of joint ventures		(9,063)		-		-		-		(9,063)
Gain on bargain purchase acquisition		2,197		-		-		-		2,197
Other income		403		7		-		-		410

Income (loss) from continuing operations before income taxes		19,723		(5,167)		1,282		(15,863)		(25)

Income tax (provision) benefit		1,307		-		(882)		-		425

Income (loss) from continuing operations		21,030		(5,167)		400		(15,863)		400
Loss from discontinued operations, net of income taxes		(9,118)		(1,343)		(9,118)		10,461		(9,118)
Net income (loss)		11,912		(6,510)		(8,718)		(5,402)		(8,718)
Net (income) loss attributable to noncontrolling interest		-		-		-		-		-
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	11,912	$	(6,510)	$	(8,718)	$	(5,402)	$	(8,718)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	11,713	$	(6,899)	$	(9,306)	$	(4,814)	$	(9,306)


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

Contract revenues	$	497,486	$	17,654	$	-	$	-	$	515,140
Costs of contract revenues		(422,764)		(20,034)		-		-		(442,798)
Gross profit		74,722		(2,380)		-		-		72,342

OPERATING EXPENSES:
General and administrative expenses		48,695		5		-		-		48,700
Proceeds from loss of use claim		(13,272)		-		-		-		(13,272)
Gain on sale of assets—net		(3,141)		-		-		-		(3,141)
Operating income (loss)		42,440		(2,385)		-		-		40,055

Interest expense—net		(214)		(160)		(16,297)		-		(16,671)
Equity in earnings of subsidiaries		306		-		39,777		(40,083)		-
Equity in earnings of joint ventures		452		-		-		-		452
Other expense		(55)		(348)		-		-		(403)

Income (loss) from continuing operations before income taxes		42,929		(2,893)		23,480		(40,083)		23,433

Income tax (provision) benefit		45		2		(8,373)		-		(8,326)

Income (loss) from continuing operations		42,974		(2,891)		15,107		(40,083)		15,107
Loss from discontinued operations, net of income taxes		(38,618)		(265)		(38,618)		38,883		(38,618)
Net income (loss)		4,356		(3,156)		(23,511)		(1,200)		(23,511)
Net loss attributable to noncontrolling interest		-		-		151		-		151
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	$	4,356	$	(3,156)	$	(23,360)	$	(1,200)	$	(23,360)


Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$	4,234	$	(3,287)	$	(23,613)	$	(947)	$	(23,613)

Condensed Cash Flow Statement


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2014
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	$	24,488	$	(3,357)	$	(5,840)	$	-	$	15,291
Net cash flows used in operating activities of discontinued operations		(4,000)		(1,024)		-		-		(5,024)
Cash provided by (used in) operating activities		20,488		(4,381)		(5,840)		-		10,267

INVESTING ACTIVITIES:
Purchases of property and equipment		(66,433)		-		-		-		(66,433)
Proceeds from dispositions of property and equipment		1,614		-		-		-		1,614
Payments on vendor performance obligations		(3,100)		-		-		-		(3,100)
Payments for acquisitions of businesses		(2,048)		-		-		-		(2,048)
Net change in accounts with affiliates		(9,402)		-		-		9,402		-
Net cash flows used in investing activities of continuing operations		(79,369)		-		-		9,402		(69,967)
Net cash flows provided by investing activities of discontinued operations		5,275		-		-		-		5,275
Cash used in investing activities		(74,094)		-		-		9,402		(64,692)

FINANCING ACTIVITIES:
Deferred financing fees		-		-		(845)		-		(845)
Taxes paid on settlement of vested share awards		-		-		(501)		-		(501)
Repayments of equipment debt		(121)		-		-		-		(121)
Purchase of noncontrolling interest		-		-		(205)		-		(205)
Net change in accounts with affiliates		-		3,595		5,807		(9,402)		-
Exercise of options and purchases from employee stock plans		-		-		1,542		-		1,542
Excess income tax benefit from share-based compensation		-		-		45		-		45
Borrowings under revolving loans		-		-		105,000		-		105,000
Repayments of revolving loans		-		-		(105,000)		-		(105,000)

Net cash flows provided by (used in) financing activities of continuing operations		(121)		3,595		5,843		(9,402)		(85)
Net cash flows provided by (used in) financing activities of discontinued operations		-		-		-		-		-
Cash provided by (used in) financing activities		(121)		3,595		5,843		(9,402)		(85)

Effect of foreign currency exchange rates on cash and cash equivalents		-		260		-		-		260

Net increase (decrease) in cash and cash equivalents		(53,727)		(526)		3		-		(54,250)

Cash and cash equivalents at beginning of period		71,939		3,399		-		-		75,338

Cash and cash equivalents at end of period	$	18,212	$	2,873	$	3	$	-	$	21,088


GREAT LAKES DREDGE & DOCK CORPORATION AND SUBSIDIARIES
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013
(In thousands)

	Subsidiary Guarantors		Non-Guarantor Subsidiaries		GLDD Corporation		Eliminations		Consolidated Totals

OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	$	47,543	$	(6,776)	$	(29,542)	$	-	$	11,225
Net cash flows used in operating activities of discontinued operations		(8,054)		(437)		-		-		(8,491)
Cash provided by (used in) operating activities		39,489		(7,213)		(29,542)		-		2,734

INVESTING ACTIVITIES:
Purchases of property and equipment		(37,968)		-		-		-		(37,968)
Proceeds from dispositions of property and equipment		4,194		-		-		-		4,194
Proceeds from vendor performance obligations		13,600		-		-		-		13,600
Net change in accounts with affiliates		(5,309)		-		-		5,309		-

Net cash flows used in investing activities of continuing operations		(25,483)		-		-		5,309		(20,174)
Net cash flows used in investing activities of discontinued operations		(149)		-		-		-		(149)
Cash used in investing activities		(25,632)		-		-		5,309		(20,323)

FINANCING ACTIVITIES:
Repayments of long term note payable		-		-		(10,547)		-		(10,547)
Taxes paid on settlement of vested share awards		-		-		(305)		-		(305)
Repayment of equipment debt		(6)		-		-		-		(6)
Net change in accounts with affiliates		-		9,700		(4,391)		(5,309)		-
Exercise of options and purchases from employee stock plans		-		-		581		-		581
Excess income tax benefit from share-based compensation		-		-		133		-		133
Borrowings under revolving loans		-		-		194,500		-		194,500
Repayments of revolving loans		-		-		(149,500)		-		(149,500)
Capital contributions		-		926		(926)		-		-

Net cash flows provided by (used in) financing activities of continuing operations		(6)		10,626		29,545		(5,309)		34,856
Net cash flows used in financing activities of discontinued operations		(36)		-		(3)		-		(39)
Cash provided by (used in) financing activities		(42)		10,626		29,542		(5,309)		34,817

Effect of foreign currency exchange rates on cash and cash equivalents		-		(346)		-		-		(346)

Net increase in cash and cash equivalents		13,815		3,067		-		-		16,882

Cash and cash equivalents at beginning of period		24,272		168		-		-		24,440

Cash and cash equivalents at end of period	$	38,087	$	3,235	$	-	$	-	$	41,322

Basis of presentation (Narrative) (Details) - segment	3 Months Ended	9 Months Ended
Basis of presentation (Narrative) (Details) - segment	Sep. 30, 2014	Sep. 30, 2014
Basis of presentation [Line Items]
Number of reportable segments		2
Number of 0perating Segments		4
Maximum [Member]
Basis of presentation [Line Items]
Average equipment-related costs of total costs of contract revenue	23.00%
Minimum [Member]
Basis of presentation [Line Items]
Average equipment-related costs of total costs of contract revenue	22.00%

Earnings per share (Estimated Useful Lives By Class Of Assets) (Narrative) (Detail) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Earnings Per Share Basic Line Items
Potentially dilutive stock options and restricted stock units	521
Treasury Stock [Member]
Earnings Per Share Basic Line Items
Potentially dilutive stock options and restricted stock units	664	500

Earnings per share (Computations For Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Basic Line Items
Income (loss) from continuing operations	$ (1,027)	$ 6,576	$ 400	$ 15,107
Loss on discontinued operations, net of income taxes, attributable to Great Lakes Dredge & Dock Corporation	(1,059)	(5,128)	(9,118)	(38,467)
Net loss attributable to common stockholders of Great Lakes Dredge & Dock	$ (2,086)	$ 1,448	$ (8,718)	$ (23,360)
Weighted-average common shares outstanding - basic	60,040	59,526	59,870	59,444
Effect of stock options and restricted stock units		556	621	556
Weighted-average common shares outstanding - diluted	60,040	60,082	60,491	60,000
Basic earnings (loss) per share attributable to continuing operations	$ (0.01)	$ 0.11	$ 0.01	$ 0.25
Diluted earnings (loss) per share attributable to continuing operations	$ (0.01)	$ 0.11	$ 0.01	$ 0.25
GLDD Corporation [Member]
Earnings Per Share Basic Line Items
Income (loss) from continuing operations	$ (1,027)	$ 6,576	$ 400	$ 15,107
Net loss attributable to common stockholders of Great Lakes Dredge & Dock	$ (2,086)	$ 1,448	$ (8,718)	$ (23,360)

Accounts Receivable And Contracts In Progress (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
Accounts Receivable [Line Items]
Retainage	$ 16,450	$ 18,506
Accounts Receivable, Gross	100,570	98,044
Allowance for doubtful accounts	(1,529)	(1,529)
Total accounts receivable-net	99,041	96,515
Current portion of accounts receivable-net	98,118	96,515
Long-term accounts receivable and retainage	923
Completed Contracts [Member]
Accounts Receivable [Line Items]
Contracts	12,718	17,361
Contracts In Progress [Member]
Accounts Receivable [Line Items]
Contracts	$ 71,402	$ 62,177

Accounts Receivable And Contracts In Progress (Components Of Contracts In Progress) (Details) - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Costs and earnings in excess of billings for contracts in progress	$ 77,034	$ 64,740
Costs and earnings in excess of billings for completed contracts	8,594	2,692
Total contract revenues in excess of billings	85,628	67,432
Total billings in excess of contract revenues	(4,978)	(6,754)
Costs And Earnings In Excess Of Billings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Costs and earnings for contracts in progress	737,986	435,470
Amounts billed	(660,952)	(370,730)
Billings In Excess Of Costs And Earnings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Billings in excess of costs and earnings, Amounts billed	(175,854)	(156,794)
Billings in excess of costs and earnings, Costs and earnings for contracts in progress	$ 170,876	$ 150,040

Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
Accrued Expenses [Abstract]
Insurance	$ 13,219	$ 8,649
Payroll and employee benefits	8,406	13,664
Income and other taxes	4,803	3,709
Interest	3,309	8,066
Percentage of completion adjustment	451	2,135
Other	19,567	2,308
Total accrued expenses	$ 49,755	$ 38,531

Long-term debt (Narrative) (Details)		9 Months Ended
Long-term debt (Narrative) (Details)	Sep. 15, 2014 USD ($) item	Sep. 30, 2014 USD ($) item	Dec. 31, 2013 USD ($)	Jun. 04, 2012 USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding		$ 35,000,000	$ 35,000,000
Net Leverage Ratio \| item		4.50
Fixed Charge Coverage Ratio		125.00%
Letters of credit outstanding		$ 117,761,000
Letter of credit remaining borrowing capacity		$ 57,239,000
Senior Notes [Member]
Debt Instrument [Line Items]
Percentage Of Debt Instrument Issued At Face Value		7.375%
Debt instrument, face amount		$ 250,000
Stated interest rate		7.275%
Terminated international Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit remaining borrowing capacity	$ 24,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 210,000,000
Line of Credit Facility, Amount Outstanding		$ 35,000,000
Line of credit facility optional increase capacity				15,000,000
Revolving credit facility, interest rate description		On September 15, 2014, the Company entered into the fifth amendment (the "Fifth Amendment") to the Credit Agreement which exercised a portion of the incremental loans feature of the Credit Agreement that allowed the Company to increase the aggregate revolving commitment. A new lender provided an incremental commitment of $35,000 increasing the aggregate revolving commitment to $210,000. Additionally, the Fifth Amendment allowed full use of the aggregate revolving commitment for the issuance of letters of credit and decreasing the required ratio of aggregate orderly liquidation value of pledged collateral from 1.5 times to 1.27 times the aggregate revolving commitment. The Fifth Amendment further amended the Credit Agreement to secured and collateralized by perfected liens on certain of the Company's vessels and its domestic accounts receivable, subject to permitted liens and prior interests of other parties. In connection with the Company's entry into the Fifth Amendment, Zurich American Insurance Company, the Company's surety provider, secured permitted second mortgages on the same vessels securing the obligations under the Credit Agreement.Depending on the Company's consolidated leverage ratio (as defined in the Credit Agreement), borrowings under the revolving credit facility will bear interest at the option of the Company of either a LIBOR rate plus a margin of between 1.50% to 2.50% per annum or a base rate plus a margin of between 0.50% to 1.50% per annum.
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
GLDD Corporation [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding		$ 35,000,000	$ 35,000,000
Maximum [Member]
Debt Instrument [Line Items]
Decreased required ratio of aggregate orderly liquidation value of pledged collateral \| item	1.27
Maximum [Member] \| LIBOR Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.50%
Revolving credit facility, basis spread on variable rate		2.50%
Maximum [Member] \| Base Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Revolving credit facility, basis spread on variable rate		1.50%
Minimum [Member]
Debt Instrument [Line Items]
Decreased required ratio of aggregate orderly liquidation value of pledged collateral \| item	1.50
Minimum [Member] \| LIBOR Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Revolving credit facility, basis spread on variable rate		1.50%
Minimum [Member] \| Base Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Revolving credit facility, basis spread on variable rate		0.50%

Fair Value Measurements (Narrative) (Details) $ in Thousands, gal in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2014 USD ($) $ / gal	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($) $ / gal gal	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Jan. 31, 2011 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Derivative underlying hedge percent			80.00%
Derivative, Nonmonetary Notional Amount, Volume \| gal			4.1
Senior Notes	$ 250,000		$ 250,000		$ 250,000	$ 250,000
Reclassification of derivative losses (gains) to earnings-net of tax	306	$ 53	332	$ (237)
Fair value hedge liabilities	$ 1,051		$ 1,051
Senior notes interest rate	7.375%		7.375%			7.375%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed price range \| $ / gal	3.01		3.01
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed price range \| $ / gal	2.86		2.86
Senior Notes [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Senior Notes	$ 256,875		$ 256,875

Fair Value Measurements (Fair Value Measurements at Reporting Date Using) (Details) - Fuel Hedge Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure		$ 332
Liabilities, fair value disclosure	$ 1,051
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure		$ 332
Liabilities, fair value disclosure	$ 1,051

Fair Value Measurements (Accumulated other comprehensive loss) (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Derivatives, Fair Value [Line Items]

Cumulative translation adjustments-net of tax

$ (416)

$ (51)

$ (389)

$ (131)

Reclassification of derivative losses (gains) to earnings-net of tax

(306)

(53)

(332)

237

Total other comprehensive income (loss)

136

(35)

132

(359)

Net unrealized (gain) loss on derivatives-net of tax (2)

^[1]

(169)

(88)

(199)

(122)

Other comprehensive loss-net of tax

(585)

(139)

(588)

(253)

Costs of contract revenues

177,739

160,026

489,720

442,798

Income tax provision

(1,069)

3,060

(425)

8,326

Net income (loss)

(2,086)

1,266

(8,718)

(23,511)

Fuel Hedge Contracts [Member]

Derivatives, Fair Value [Line Items]

Costs of contract revenues

(241)

(88)

(286)

395

Income tax provision

(35)

158

Net income (loss)

$ (306)

$ (53)

$ (332)

$ 237

[1]	Net of income tax expense of $111 and $58 for the three months ended September 30, 2014 and 2013, respectively, and $132 and $81 for the nine months ended September 30, 2014 and 2013, respectively.

Fair Value Measurements (Balance Sheet Location) (Details) - Designated as Hedging Instrument [Member] - Other Current Assets [Member] - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset		$ 332
Derivative asset, fair value, gross liability	$ 1,051

Share-Based Compensation (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	337
Restricted stock units	182
Share-based compensation expense		$ 828	$ 1,000	$ 1,816	$ 2,452
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

Commitments And Contingencies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jan. 31, 2011
Commitments And Contingencies [Line Items]
Letters of credit outstanding	$ 117,761
Letter of credit remaining borrowing capacity	$ 57,239
Senior notes interest rate	7.375%		7.375%
Revenue value remaining from outstanding performance bonds	$ 603,748
Senior Notes	250,000	$ 250,000	$ 250,000
Projects Accounted For Discontinued Operations [Member]
Commitments And Contingencies [Line Items]
Outstanding performance bonds	49,613
GLDD Corporation [Member]
Commitments And Contingencies [Line Items]
Senior Notes	250,000	$ 250,000
Maximum [Member]
Commitments And Contingencies [Line Items]
Bids bond range	$ 10,000
Warranty periods	3 years
Minimum [Member]
Commitments And Contingencies [Line Items]
Bids bond range	$ 1,000
Warranty periods	1 year

Investments (Investments Under the Equity Method) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Investments [Abstract]
Equity Method Investment, Summarized Financial Information, Revenue	$ 5,853	$ 4,424
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	(15,241)	(714)
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	$ (16,110)	$ (1,608)

Business Combinations And Dispositions (Results Of Discontinued Operations) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Dispositions [Abstract]
Revenue			$ 10,964	$ 14,439	$ 25,396
Loss before income taxes from discontinued operations		$ (1,053)	(7,687)	(18,393)	(48,608)
Income tax benefit		(6)	2,377	9,275	9,990
Loss from discontinued operations, net of income taxes		$ (1,059)	$ (5,310)	$ (9,118)	$ (38,618)
Proceeds from Divestiture of Businesses	$ 5,309

Segment Information (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Narrative) (Details) $ in Thousands	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($) segment	Sep. 30, 2013 USD ($)
Segment Reporting Information [Line Items]
Contract revenues	$ 202,198	$ 187,862	$ 561,289	$ 515,140
Number of reportable segments \| segment			2
Dredging [Member]
Segment Reporting Information [Line Items]
Contract revenues	167,079	155,469	$ 486,153	465,915
Number of reportable segments \| segment			2
Demolition [Member]
Segment Reporting Information [Line Items]
Contract revenues	37,182	36,114	$ 79,224	53,215
Foreign [Member]
Segment Reporting Information [Line Items]
Contract revenues	40,040	32,651	85,691	104,384
Intersegment Revenues [Member]
Segment Reporting Information [Line Items]
Contract revenues	$ (2,063)	$ (3,721)	$ (4,088)	$ (3,990)

Segment Information (Segment Reporting By Segment) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($) segment	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Contract revenues	$ 202,198	$ 187,862	$ 561,289	$ 515,140
Operating income (loss)	8,007	13,929	21,161	40,055
Depreciation and amortization			32,744	33,777
Total assets	817,198		817,198		$ 852,645
Property and equipment - net	382,331		382,331		345,620
Investment in joint ventures	8,445		$ 8,445		8,256
Number of Reportable Segments \| segment			2
GLDD Corporation [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(73)		$ (73)
Total assets	629,464		629,464		$ 676,831
Dredging [Member]
Segment Reporting Information [Line Items]
Contract revenues	167,079	155,469	486,153	465,915
Operating income (loss)	5,733	13,129	$ 24,157	46,698
Number of Reportable Segments \| segment			2
Demolition [Member]
Segment Reporting Information [Line Items]
Contract revenues	37,182	36,114	$ 79,224	53,215
Operating income (loss)	$ 2,274	$ 800	$ (2,996)	$ (6,643)

Subsidiary Guarantors (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jan. 31, 2011
Senior Notes	$ 250,000	$ 250,000	$ 250,000
Senior notes interest rate	7.375%		7.375%
Owned Domestic Subsidiaries Percent	100.00%
GLDD Corporation [Member]
Senior Notes	$ 250,000	$ 250,000

Subsidiary Guarantors (Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Jan. 31, 2011
ASSETS
Cash and cash equivalents	$ 21,088	$ 75,338	$ 41,322	$ 24,440
Accounts receivable-net	98,118	96,515
Contract revenues in excess of billings	85,628	67,432
Inventories	33,194	32,500
Prepaid expenses and other current assets	58,440	44,164
Assets held for sale, current		45,104
Total current assets	296,468	361,053
PROPERTY AND EQUIPMENT-Net	382,331	345,620
GOODWILL AND OTHER INTANGIBLE ASSETS-Net	80,885	81,302
INVENTORIES-Noncurrent	37,324	38,496
INVESTMENTS IN JOINT VENTURES	8,445	8,256
Assets held for sale, noncurrent		8,856
OTHER	11,745	9,062
TOTAL	817,198	852,645
LIABILITIES AND EQUITY
Accounts payable	139,341	116,121
Accrued expenses	49,755	38,531
Billings in excess of contract revenues	4,978	6,754
Liabilities held for sale		32,493
Current portion of long term debt	373
Total current liabilities	194,447	193,899
7 3/8% SENIOR NOTES	250,000	250,000			$ 250,000
REVOLVING CREDIT FACILITY	35,000	35,000
LONG TERM NOTE PAYABLE	485
DEFERRED INCOME TAXES	90,040	108,511
LIABILITIES HELD FOR SALE-Noncurrent		1,212
OTHER	11,672	21,922
Total liabilities	581,644	610,544
EQUITY:
Total Great Lakes Dredge & Dock Corporation equity	235,554	242,946
NONCONTROLLING INTERESTS		(845)
TOTAL EQUITY	235,554	242,101	252,519	273,425
TOTAL	817,198	852,645
Subsidiary Guarantors [Member]
ASSETS
Cash and cash equivalents	18,212	71,939	38,087	24,272
Accounts receivable-net	98,118	95,476
Receivables from affiliates	164,731	131,984
Contract revenues in excess of billings	82,717	63,591
Inventories	33,194	32,500
Prepaid expenses and other current assets	60,207	23,549
Assets held for sale, current		41,763
Total current assets	457,179	460,802
PROPERTY AND EQUIPMENT-Net	382,325	345,612
GOODWILL AND OTHER INTANGIBLE ASSETS-Net	80,885	81,302
INVENTORIES-Noncurrent	37,324	38,496
INVESTMENTS IN JOINT VENTURES	8,445	8,256
INVESTMENTS IN SUBSIDIARIES	3,722	1,212
Assets held for sale, noncurrent		8,796
OTHER	7,409	3,886
TOTAL	977,289	948,362
LIABILITIES AND EQUITY
Accounts payable	138,137	115,235
Payables to affiliates	175,587	96,270
Accrued expenses	45,663	28,086
Billings in excess of contract revenues	4,978	6,754
Liabilities held for sale		38,158
Current portion of long term debt	373
Total current liabilities	364,738	284,503
LONG TERM NOTE PAYABLE	485
DEFERRED INCOME TAXES	(363)
LIABILITIES HELD FOR SALE-Noncurrent		1,212
OTHER	11,121	21,679
Total liabilities	375,981	307,394
EQUITY:
Total Great Lakes Dredge & Dock Corporation equity	601,308	640,968
TOTAL EQUITY	601,308	640,968
TOTAL	977,289	948,362
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	2,873	3,399	$ 3,235	$ 168
Accounts receivable-net		1,039
Receivables from affiliates	3,561	7,337
Contract revenues in excess of billings	2,911	3,841
Prepaid expenses and other current assets	875	137
Assets held for sale, current		11,877
Total current assets	10,220	27,630
PROPERTY AND EQUIPMENT-Net	6	8
Assets held for sale, noncurrent		60
OTHER	3	3
TOTAL	10,229	27,701
LIABILITIES AND EQUITY
Accounts payable	903	754
Payables to affiliates	12,327	24,862
Accrued expenses	221	15
Liabilities held for sale		2,871
Total current liabilities	13,451	28,502
Total liabilities	13,451	28,502
EQUITY:
Total Great Lakes Dredge & Dock Corporation equity	(3,222)	(801)
TOTAL EQUITY	(3,222)	(801)
TOTAL	10,229	27,701
GLDD Corporation [Member]
ASSETS
Cash and cash equivalents	3
Receivables from affiliates	33,406	12,205
Prepaid expenses and other current assets	(2,642)	20,478
Total current assets	30,767	32,683
INVESTMENTS IN SUBSIDIARIES	594,364	638,955
OTHER	4,333	5,193
TOTAL	629,464	676,831
LIABILITIES AND EQUITY
Accounts payable	301	132
Payables to affiliates	13,784	30,394
Accrued expenses	3,871	10,430
Total current liabilities	17,956	40,956
7 3/8% SENIOR NOTES	250,000	250,000
REVOLVING CREDIT FACILITY	35,000	35,000
DEFERRED INCOME TAXES	90,403	108,531
OTHER	551	243
Total liabilities	393,910	434,730
EQUITY:
Total Great Lakes Dredge & Dock Corporation equity	235,554	242,946
NONCONTROLLING INTERESTS		(845)
TOTAL EQUITY	235,554	242,101
TOTAL	629,464	676,831
Eliminations [Member]
ASSETS
Receivables from affiliates	(201,698)	(151,526)
Assets held for sale, current		(8,536)
Total current assets	(201,698)	(160,062)
INVESTMENTS IN SUBSIDIARIES	(598,086)	(640,167)
OTHER		(20)
TOTAL	(799,784)	(800,249)
LIABILITIES AND EQUITY
Payables to affiliates	(201,698)	(151,526)
Liabilities held for sale		(8,536)
Total current liabilities	(201,698)	(160,062)
DEFERRED INCOME TAXES		(20)
Total liabilities	(201,698)	(160,082)
EQUITY:
Total Great Lakes Dredge & Dock Corporation equity	(598,086)	(640,167)
TOTAL EQUITY	(598,086)	(640,167)
TOTAL	$ (799,784)	$ (800,249)

Subsidiary Guarantors (Condensed Consolidated Statement Operations And Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Contract revenues	$ 202,198	$ 187,862	$ 561,289	$ 515,140
Costs of contract revenues	(177,739)	(160,026)	(489,720)	(442,798)
Gross profit	24,459	27,836	71,569	72,342
General and administrative expenses	16,062	17,121	49,850	48,700
Proceeds from loss of use claim				13,272
Loss on sale of assets-net	390	(3,214)	558	(3,141)
Operating income (loss)	8,007	13,929	21,161	40,055
Interest expense-net	(4,702)	(5,542)	(14,730)	(16,671)
Equity in earnings (loss) of joint ventures	(5,785)	1,427	(9,063)	452
Gain on bargain purchase acquisition			2,197
Other income (expense)	384	(178)	410	(403)
Income (loss) from continuing operations before income taxes	(2,096)		(25)
Income (loss) from continuing operations before income taxes	(2,096)	9,636	(25)	23,433
Income tax (provision) benefit	1,069	(3,060)	425	(8,326)
Income (loss) from continuing operations	(1,027)	6,576	400	15,107
Loss from discontinued operations, net of income taxes	(1,059)	(5,310)	(9,118)	(38,618)
Net loss	(2,086)	1,266	(8,718)	(23,511)
Net loss attributable to noncontrolling interest		(182)		(151)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	(2,086)	1,448	(8,718)	(23,360)
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	(2,671)	1,309	(9,306)	(23,613)
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Contract revenues	198,934	179,514	540,199	497,486
Costs of contract revenues	(170,911)	(149,966)	(463,718)	(422,764)
Gross profit	28,023	29,548	76,481	74,722
General and administrative expenses	15,988	17,121	49,776	48,695
Proceeds from loss of use claim				13,272
Loss on sale of assets-net	390	(3,214)	558	(3,141)
Operating income (loss)	11,645	15,641	26,147	42,440
Interest expense-net	(60)	(65)	91	(214)
Equity in earnings (loss) of subsidiaries	54	304	(52)	306
Equity in earnings (loss) of joint ventures	(5,785)	1,427	(9,063)	452
Gain on bargain purchase acquisition			2,197
Other income (expense)	384	(187)	403	(55)
Income (loss) from continuing operations before income taxes	6,238		19,723
Income (loss) from continuing operations before income taxes		17,120		42,929
Income tax (provision) benefit	697	(2,331)	1,307	45
Income (loss) from continuing operations	6,935	14,789	21,030	42,974
Loss from discontinued operations, net of income taxes	(1,059)	(5,310)	(9,118)	(38,618)
Net loss	5,876	9,479	11,912	4,356
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	5,876	9,479	11,912	4,356
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	5,707	9,391	11,713	4,234
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Contract revenues	3,264	8,348	21,090	17,654
Costs of contract revenues	(6,828)	(10,060)	(26,002)	(20,034)
Gross profit	(3,564)	(1,712)	(4,912)	(2,380)
General and administrative expenses	1		1	5
Operating income (loss)	(3,565)	(1,712)	(4,913)	(2,385)
Interest expense-net		(71)	(261)	(160)
Other income (expense)		9	7	(348)
Income (loss) from continuing operations before income taxes	(3,565)		(5,167)
Income (loss) from continuing operations before income taxes		(1,774)		(2,893)
Income tax (provision) benefit				2
Income (loss) from continuing operations	(3,565)	(1,774)	(5,167)	(2,891)
Loss from discontinued operations, net of income taxes		(198)	(1,343)	(265)
Net loss	(3,565)	(1,972)	(6,510)	(3,156)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	(3,565)	(1,972)	(6,510)	(3,156)
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	(3,981)	(2,023)	(6,899)	(3,287)
GLDD Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
General and administrative expenses	73		73
Operating income (loss)	(73)		(73)
Interest expense-net	(4,642)	(5,406)	(14,560)	(16,297)
Equity in earnings (loss) of subsidiaries	3,316	12,711	15,915	39,777
Income (loss) from continuing operations before income taxes	(1,399)		1,282
Income (loss) from continuing operations before income taxes		7,305		23,480
Income tax (provision) benefit	372	(729)	(882)	(8,373)
Income (loss) from continuing operations	(1,027)	6,576	400	15,107
Loss from discontinued operations, net of income taxes	(1,059)	(5,310)	(9,118)	(38,618)
Net loss	(2,086)	1,266	(8,718)	(23,511)
Net loss attributable to noncontrolling interest		(182)		(151)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	(2,086)	1,448	(8,718)	(23,360)
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	(2,671)	1,309	(9,306)	(23,613)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in earnings (loss) of subsidiaries	(3,370)	(13,015)	(15,863)	(40,083)
Income (loss) from continuing operations before income taxes	(3,370)		(15,863)
Income (loss) from continuing operations before income taxes		(13,015)		(40,083)
Income (loss) from continuing operations	(3,370)	(13,015)	(15,863)	(40,083)
Loss from discontinued operations, net of income taxes	1,059	5,508	10,461	38,883
Net loss	(2,311)	(7,507)	(5,402)	(1,200)
Net income (loss) attributable to common stockholders of Great Lakes Dredge & Dock Corporation	(2,311)	(7,507)	(5,402)	(1,200)
Comprehensive income (loss) attributable to Great Lakes Dredge & Dock Corporation	$ (1,726)	$ (7,368)	$ (4,814)	$ (947)

Subsidiary Guarantors (Condensed Consolidated of Cash Flow) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	$ 15,291	$ 11,225
Net cash flows used in operating activities of discontinued operations	(5,024)	(8,491)
Cash provided by operating activities	10,267	2,734
INVESTING ACTIVITIES:
Purchases of property and equipment	(66,433)	(37,968)
Proceeds from dispositions of property and equipment	1,614	4,194
Payments to Acquire Business Two, Net of Cash Acquired	2,048
Payments on vendor performance obligations	(3,100)	13,600
Net cash flows used in investing activities of continuing operations	(69,967)	(20,174)
Net cash flows provided by investing activities of discontinued operations	5,275	(149)
Cash used in investing activities	(64,692)	(20,323)
FINANCING ACTIVITIES:
Deferred financing fees	(845)
Repayment of long term note payable		(10,547)
Taxes paid on settlement of vested share awards	(501)	(305)
Repayments of equipment debt	(121)	(6)
Purchase of noncontrolling interest	(205)
Exercise of options and purchases from employee stock plans	1,542	581
Excess income tax benefit from share-based compensation	45	133
Borrowings under revolving loans	105,000	194,500
Repayments of revolving loans	(105,000)	(149,500)
Net cash flows provided by (used in) financing activities of continuing operations	(85)	34,856
Net cash flows provided by (used in) financing activities of discontinued operations		(39)
Cash provided by (used in) financing activities	(85)	34,817
Effect of foreign currency exchange rates on cash and cash equivalents	260	(346)
Net increase (decrease) in cash and cash equivalents	(54,250)	16,882
Cash and cash equivalents at beginning of period	75,338	24,440
Cash and cash equivalents at end of period	21,088	41,322
Subsidiary Guarantors [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	24,488	47,543
Net cash flows used in operating activities of discontinued operations	(4,000)	(8,054)
Cash provided by operating activities	20,488	39,489
INVESTING ACTIVITIES:
Purchases of property and equipment	(66,433)	(37,968)
Proceeds from dispositions of property and equipment	1,614	4,194
Payments to Acquire Business Two, Net of Cash Acquired	2,048
Payments on vendor performance obligations	(3,100)	13,600
Net change in accounts with affiliates	(9,402)	(5,309)
Net cash flows used in investing activities of continuing operations	(79,369)	(25,483)
Net cash flows provided by investing activities of discontinued operations	5,275	(149)
Cash used in investing activities	(74,094)	(25,632)
FINANCING ACTIVITIES:
Repayments of equipment debt	(121)
Net cash flows provided by (used in) financing activities of continuing operations	(121)	(6)
Net cash flows provided by (used in) financing activities of discontinued operations		(36)
Cash provided by (used in) financing activities	(121)	(42)
Net increase (decrease) in cash and cash equivalents	(53,727)	13,815
Cash and cash equivalents at beginning of period	71,939	24,272
Cash and cash equivalents at end of period	18,212	38,087
Non-Guarantor Subsidiaries [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	(3,357)	(6,776)
Net cash flows used in operating activities of discontinued operations	(1,024)	(437)
Cash provided by operating activities	(4,381)	(7,213)
FINANCING ACTIVITIES:
Net change in accounts with affiliates, in finance activities	3,595	9,700
Capital contributions		926
Net cash flows provided by (used in) financing activities of continuing operations	3,595	10,626
Cash provided by (used in) financing activities	3,595	10,626
Effect of foreign currency exchange rates on cash and cash equivalents	260	(346)
Net increase (decrease) in cash and cash equivalents	(526)	3,067
Cash and cash equivalents at beginning of period	3,399	168
Cash and cash equivalents at end of period	2,873	3,235
GLDD Corporation [Member]
OPERATING ACTIVITIES:
Net cash flows provided by (used in) operating activities of continuing operations	(5,840)	(29,542)
Cash provided by operating activities	(5,840)	(29,542)
FINANCING ACTIVITIES:
Deferred financing fees	(845)
Repayment of long term note payable		(10,547)
Taxes paid on settlement of vested share awards	(501)	(305)
Purchase of noncontrolling interest	(205)
Exercise of options and purchases from employee stock plans	1,542	581
Excess income tax benefit from share-based compensation	45	133
Net change in accounts with affiliates, in finance activities	5,807	(4,391)
Borrowings under revolving loans	105,000	194,500
Repayments of revolving loans	(105,000)	(149,500)
Capital contributions		(926)
Net cash flows provided by (used in) financing activities of continuing operations	5,843	29,545
Net cash flows provided by (used in) financing activities of discontinued operations		(3)
Cash provided by (used in) financing activities	5,843	29,542
Net increase (decrease) in cash and cash equivalents	3
Cash and cash equivalents at end of period	3
Eliminations [Member]
INVESTING ACTIVITIES:
Net change in accounts with affiliates	9,402	5,309
Net cash flows used in investing activities of continuing operations	9,402	5,309
Cash used in investing activities	9,402	5,309
FINANCING ACTIVITIES:
Net change in accounts with affiliates, in finance activities	(9,402)	(5,309)
Net cash flows provided by (used in) financing activities of continuing operations	(9,402)	(5,309)
Cash provided by (used in) financing activities	$ (9,402)	$ (5,309)