Orion (ORN) 10-K 24 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 16, 2017	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	ORION GROUP HOLDINGS INC.
Entity Central Index Key	1,402,829
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		27,791,476
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 147

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 305	$ 1,345
Accounts receivable:
Trade, net of allowance of $0 and $0, respectively	92,202	72,358
Retainage	40,201	35,433
Other current	4,634	5,313
Income taxes receivable	133	83
Inventory	5,392	4,867
Deferred tax asset	2,013	3,108
Costs and estimated earnings in excess of billings on uncompleted contracts	39,968	59,608
Assets held for sale	6,375	6,375
Prepaid expenses and other	3,885	4,627
Total current assets	195,108	193,117
Property and equipment, net	158,082	165,989
Accounts receivable, non-current	733	222
Inventory, non-current	3,998	6,218
Goodwill	66,351	65,982
Intangible assets, net of amortization	22,032	29,319
Other non-current	1,372	615
Total assets	447,676	461,462
Current liabilities:
Current debt, net of debt issuance costs	19,188	12,004
Accounts payable:
Trade	49,123	52,719
Retainage	893	1,671
Accrued liabilities	19,946	22,149
Taxes payable	689	813
Billings in excess of costs and estimated earnings on uncompleted contracts	27,681	28,484
Total current liabilities	117,520	117,840
Long-term debt, net of debt issuance costs	82,077	94,605
Other long-term liabilities	2,493	1,813
Deferred income taxes	19,000	19,345
Interest rate swap liability	382	145
Total liabilities	221,472	233,748
Commitments and contingencies
Stockholders’ equity:
Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued	0	0
Other comprehensive loss	(382)	(145)
Common stock -- $0.01 par value, 50,000,000 authorized, 28,405,850 and 27,992,589 issued; 27,694,626 and 27,281,358 outstanding at December 31, 2016 and December 31, 2015, respectively	283	279
Treasury stock, 711,231 and 711,231 shares, at cost December 31, 2016 and December 31, 2015, respectively	(6,540)	(6,540)
Additional paid-in capital	171,079	168,736
Retained earnings	61,764	65,384
Total stockholders’ equity	226,204	227,714
Total liabilities and stockholders’ equity	$ 447,676	$ 461,462

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Allowance for doubtful accounts	$ 0	$ 0
Stockholders' Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	28,405,850	27,992,589
Common stock, shares outstanding	27,694,626	27,281,358
Treasury stock, shares	(711,231)	(711,231)

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Contract revenues	$ 578,236	$ 466,498	$ 385,818
Costs of contract revenues	510,754	426,316	341,224
Gross profit	67,482	40,182	44,594
Selling, general and administrative expenses	64,987	47,715	34,691
Gain (Loss) on Disposition of Assets	(1,579)	466	(359)
Operating income (loss)	4,074	(7,999)	10,262
Other (expense) income:
(Gain) loss from sale of assets, net	1,579	(466)	359
Other income	59	536	467
Interest income	3	32	17
Interest expense	(6,175)	(3,148)	(694)
Other (expense) income, net	(6,113)	(2,580)	(210)
(Loss) income before income taxes	(2,039)	(10,579)	10,052
Income tax expense (benefit)	1,581	(2,519)	3,175
Net (loss) income	$ (3,620)	$ (8,060)	$ 6,877
Basic income (loss) per share (USD per share)	$ (0.13)	$ (0.29)	$ 0.25
Diluted income (loss) per share (USD per share)	$ (0.13)	$ (0.29)	$ 0.25
Shares used to compute (loss) income per share
Basic (in shares)	27,536,967	27,366,528	27,421,441
Diluted (in shares)	27,536,967	27,366,528	27,787,613

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income Statement - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,620)	$ (8,060)	$ 6,877
Change in fair value of cash flow hedge, net of tax expense of $25, and benefit of $90 and $0 for the years ended December 31, 2016, 2015 and 2014, respectively	(237)	(145)	0
Total comprehensive (loss) income	$ (3,857)	$ (8,205)	$ 6,877

Consolidated Statements of Com6

Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Change in fair value of cash flow hedge, net of tax	$ 25	$ 0	$ 0

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings
Beginning balance, shares at Dec. 31, 2013		27,710,775
Beginning balance at Dec. 31, 2013	$ 227,812	$ 278	$ (3,003)		$ 163,970	$ 66,567
Beginning treasury stock, shares at Dec. 31, 2013			(317,731)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 1,594				1,594
Exercise of stock options, shares	143,282	143,282
Exercise of stock options	$ 870	$ 1			869
Issue restricted stock, shares		115,726
Purchase of stock into treasury, shares			(43,500)
Purchase of shares into treasury	(436)		$ (436)
Net (loss) income	6,877					6,877
Ending balance, shares at Dec. 31, 2014		27,969,783
Ending balance at Dec. 31, 2014	236,717	$ 279	$ (3,439)		166,433	73,444
Ending treasury stock, shares at Dec. 31, 2014			(361,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 2,275				2,275
Exercise of stock options, shares	3,970	3,970
Exercise of stock options	$ 28	$ 0			28
Issue restricted stock, shares		38,660
Cash flow hedge, net of tax	(145)			$ (145)
Forfeiture of restricted stock, shares		(19,824)
Purchase of stock into treasury, shares			(350,000)
Purchase of shares into treasury	(3,101)		$ (3,101)
Net (loss) income	$ (8,060)					(8,060)
Ending balance, shares at Dec. 31, 2015	27,992,589	27,992,589
Ending balance at Dec. 31, 2015	$ 227,714	$ 279	$ (6,540)	(145)	168,736	65,384
Ending treasury stock, shares at Dec. 31, 2015	(711,231)		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 2,280				2,280
Exercise of stock options, shares	13,850	13,850
Exercise of stock options	$ 67				67
Issue restricted stock, shares		407,002
Cash flow hedge, net of tax	(237)			(237)
Forfeiture of restricted stock, shares		(7,591)
Net (loss) income	$ (3,620)					(3,620)
Ending balance, shares at Dec. 31, 2016	28,405,850	28,405,850
Ending balance at Dec. 31, 2016	$ 226,204	$ 283	$ (6,540)	$ (382)	171,079	$ 61,764
Ending treasury stock, shares at Dec. 31, 2016	(711,231)		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues	$ 0	$ 4			$ (4)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net (loss) income	$ (3,620)	$ (8,060)	$ 6,877
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	34,162	28,083	23,451
Deferred financing cost amortization	1,225	462	0
Bad debt expense	0	22	993
Deferred income taxes	751	(2,885)	1,869
Stock-based compensation	2,280	2,275	1,594
(Gain) loss on sale of property and equipment	(1,579)	466	(359)
Change in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(23,935)	(2,666)	(4,202)
Income tax receivable	(49)	249	0
Inventory	1,696	1,150	(3,702)
Accounts receivable, non-current	(511)	(222)	0
Prepaid expenses and other	856	(467)	(695)
Costs and estimated earnings in excess of billings on uncompleted contracts	19,640	(10,655)	(19,725)
Accounts payable	(5,717)	12,245	(1,178)
Accrued liabilities	(1,123)	1,658	4,428
Income tax payable	(125)	(1,097)	538
Billings in excess of costs and estimated earnings on uncompleted contracts	(802)	4,655	2,109
Deferred revenue	0	(34)	(53)
Net cash provided by operating activities	23,149	25,179	11,945
Cash flows from investing activities:
Proceeds from sale of property and equipment	2,152	2,708	1,005
Purchase of property and equipment	(18,715)	(20,802)	(18,711)
Net cash used in investing activities	(17,686)	(128,795)	(42,787)
Cash flows from financing activities:
Borrowings from Credit Facility	57,000	149,021	30,000
Payments made on borrowings from Credit Facility	(63,084)	(42,955)	(1,557)
Extinguishment of debt	0	(32,427)	0
Loan costs from Credit Facility	(486)	(4,498)	0
Exercise of stock options	67	28	869
Purchase of shares into treasury	0	(3,101)	(436)
Net cash (used in) provided by financing activities	(6,503)	66,068	28,876
Net change in cash and cash equivalents	(1,040)	(37,548)	(1,966)
Cash and cash equivalents at beginning of year	1,345	38,893	40,859
Cash and cash equivalents at end of year	305	1,345	38,893
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	5,031	3,063	742
Taxes, net of refunds	999	584	770
Acquisition of TAS and purchase price adjustment
Cash flows from investing activities:
Payments for acquisition of businesses	(369)	(110,344)	0
Houston Industrial Tool Services, Inc.
Cash flows from investing activities:
Payments for acquisition of businesses	0	(357)	0
Acquisition of business in Pacific Northwest
Cash flows from investing activities:
Payments for acquisition of businesses	0	0	(25,081)
Acquisition of TW LaQuay Dredging [Member]
Cash flows from investing activities:
Payments for acquisition of businesses	$ (754)	$ 0	$ 0

Description of Business and Bas

Description of Business and Basis of Presentation	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of Business Orion Group Holdings, Inc., its subsidiaries and affiliates (hereafter collectively referred to as the "Company"), is a leading specialty construction company in the building, industrial, and infrastructure sectors in the continental United States, Alaska, Canada and the Caribbean Basin through its heavy civil marine construction and its commercial concrete construction segments. The Company’s heavy civil marine construction segment services include marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services. Its commercial concrete construction segment provides turnkey concrete construction services including pour and finish, dirt work, layout, forming, rebar, and mesh across the light commercial structural and other associated business areas. The Company is headquartered in Houston, Texas with offices throughout its operating areas. The tools used by the chief operating decision maker to allocate resources and assess performance are based on two reportable and operating segments: heavy civil marine construction and commercial concrete construction. Although the Company describes its business in this report in terms of the services it provides, our base of customers and the areas in which it operates, it has determined that its operations currently comprise two reportable segments pursuant to FASB ASC Topic 280 - Segment Reporting . In previous reporting periods, the Company reported its financial information based on one reportable segment, now known as the heavy civil marine construction segment. With the acquisition of TAS in 2015, we expanded to two operating and reportable segments, adding the commercial concrete construction segment. In making this determination, the Company considered the similar economic characteristics of its operations. For the heavy civil marine construction segment, the methods used, and the internal processes employed, to deliver heavy civil marine construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment has the same customers with similar funding drivers, and it complies with regulatory environments driven through Federal agencies such as the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, EPA and OSHA, among others. Additionally, the segment is driven by macro-economic considerations including the level of import/export seaborne transportation, development of energy related infrastructure, cruise line expansion and operations, marine bridge infrastructure development, waterway pipeline crossings and the maintenance of waterways. These considerations, and others, are key catalysts for future prospects and are similar across the segment. For our commercial concrete construction segment, the Company also considered the similar economic characteristics of these operations. The methods used, and the internal processes employed to deliver our commercial concrete construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment complies with regulatory environments such as OSHA. Additionally, this segment is driven by macro-economic considerations, including movements in population, commercial real estate development, institutional funding and expansion, and recreational developments, specifically in metropolitan areas of Texas. These considerations, and others, are key catalysts for future prospects and are similar across the segment. Basis of Presentation These consolidated financial statements include the accounts of the parent company, Orion Group Holdings, Inc. and its wholly-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America. All intercompany balances and transactions have been eliminated in consolidation.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Principles	Summary of Significant Accounting Principles The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management’s estimates, judgments and assumptions are continually evaluated based on available information and experience; however, actual amounts could differ from those estimates. On an ongoing basis, the Company evaluates the significant accounting policies used to prepare its consolidated financial statements, including, but not limited to, those related to: • Revenue recognition from construction contracts; • Allowance for doubtful accounts; • Testing of goodwill and other long-lived assets for possible impairment; • Income taxes; • Self-insurance; and • Stock based compensation. Revenue Recognition For financial statement purposes, the Company records revenue on construction contracts for financial statement purposes on the percentage-of-completion method, measured by the percentage of contract costs incurred to date to total estimated costs for each contract. This method is used because management considers contract costs incurred to be the best available measure of progress on these contracts. Contract revenue is derived from the original contract price adjusted for agreed upon change orders. Contract costs include all direct costs, such as material and labor, and those indirect costs we incur that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Pending claims are recognized as an increase in contract revenue only when the collection is deemed probable and if the amount can be reasonably estimated for purposes of calculating total profit or loss on long-term contracts. The Company records revenue and the unbilled receivable for claims to the extent of costs incurred and to the extent management believes related collection is probable and includes no profit on claims recorded. During 2016 , in accordance with ASC 605-35-25-30, the Company recognized claims of approximately $12.3 million with customers. The Company believes collection of these claims is probable, although the full amount of the recorded claims may not be recognized. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and revenues and are recognized in the period in which the revisions are determined. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined, without regard to the percentage of completion. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable. The current asset “costs and estimated earnings in excess of billings on uncompleted contracts” represents revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract. The liability “billings in excess of costs and estimated earnings on uncompleted contracts” represents billings in excess of revenues recognized. The Company’s projects are typically short in duration, and usually span a period of less than one year. Historically, the Company has not combined or segmented contracts. Classification of Current Assets and Liabilities The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion. Cash and Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. At times, cash held by financial institutions may exceed federally insured limits. The Company has not historically sustained losses on its cash balances in excess of federally insured limits. Cash equivalents at December 31, 2016 and December 31, 2015 consisted primarily of overnight bank deposits. Risk Concentrations Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of cash and cash equivalents and accounts receivable. The Company depends on its ability to continue to obtain federal, state and local governmental contracts, and indirectly, on the amount of funding available to these agencies for new and current governmental projects. Therefore, a portion of the Company’s operations may be dependent upon the level and timing of government funding. Statutory mechanics liens provide the Company high priority in the event of lien foreclosures following financial difficulties of private owners, thus minimizing credit risk with private customers. Accounts Receivable Accounts receivable are stated at the historical carrying value, less write-offs and allowances for doubtful accounts. The Company has significant investments in billed and unbilled receivables as of December 31, 2016 and 2015 . Billed receivables represent amounts billed upon the completion of small contracts and progress billings on large contracts in accordance with contract terms and milestone achievements. Unbilled receivables on fixed-price contracts, which are included in costs in excess of billings, arise as revenues are recognized under the percentage-of-completion method. Unbilled amounts on cost-reimbursement contracts represent recoverable costs and accrued profits not yet billed. Revenue associated with these billings is recorded net of any sales tax, if applicable. Past due balances over 90 days and other higher risk amounts are reviewed individually for collectability. In establishing an allowance for doubtful accounts, the Company evaluates its contract receivables and costs in excess of billings and thoroughly reviews historical collection experience, the financial condition of its customers, billing disputes and other factors. The Company writes off uncollectible accounts receivable against the allowance for doubtful accounts if it is determined that the amounts will not be collected or if a settlement is reached for an amount that is less than the carrying value. As of December 31, 2016 and December 31, 2015 , the Company had not recorded an allowance for doubtful accounts. Balances billed to customers but not paid pursuant to retainage provisions in construction contracts generally become payable upon contract completion and acceptance by the owner. Retainage at December 31, 2016 totaled $40.2 million , of which $7.4 million is expected to be collected beyond 2017. Retainage at December 31, 2015 totaled $35.4 million . The Company negotiates change orders and claims with its customers. Unsuccessful negotiations of claims could result in a change to contract revenue that is less than its carrying value, which could result in the recording of a loss. Successful claims negotiations could result in the recovery of previously recorded losses. Significant losses on receivables could adversely affect the Company’s financial position, results of operations and overall liquidity. Advertising Costs The Company primarily obtains contracts through the open bid process, and therefore advertising costs are not a significant component of expense. Advertising costs are expensed as incurred. Advertising expenses totaled $178,000 , $114,000 , and $13,000 in 2016 , 2015 and 2014 , respectively. Environmental Costs Costs related to environmental remediation are charged to expense. Other environmental costs are also charged to expense unless they increase the value of the property and/or provide future economic benefits, in which event the costs are capitalized. Environmental liabilities, if any, are recognized when the expenditure is considered probable and the amount can be reasonably estimated. The Company did not have any environmental liabilities as of December 31, 2016 or 2015 , respectively. Fair Value Measurements The Company evaluates and presents certain amounts included in the accompanying consolidated financial statements at “fair value” in accordance with U.S. GAAP, which requires the Company to base its estimates on assumptions that market participants, in an orderly transaction, would use to price an asset or liability, and to establish a hierarchy that prioritizes the information used to determine fair value. Refer to Note 8 for more information regarding fair value determination. Inventory Current inventory consists of parts and small equipment held for use in the ordinary course of business and is valued at the lower of cost (using historical average cost) or net realizable value. Where shipping and handling costs are incurred by us, these charges are included in inventory and charged to cost of contract revenue upon use. Non-current inventory consists of spare parts (including engines, cutters and gears) that require special order or longer lead times for manufacture or fabrication, but must be kept on hand to reduce downtime on a project. Refer to Note 7 for more information regarding inventory. Property and Equipment Property and equipment are stated at cost less accumulated depreciation, and depreciated using the straight line method over the estimated useful life of the asset. The estimated useful lives of our property and equipment are as follows: Automobiles and trucks 3 to 5 years Buildings and improvements 5 to 30 years Construction equipment 3 to 15 years Vessels and other equipment 1 to 15 years Office equipment 1 to 5 years Ordinary maintenance and repairs that do not improve or extend the useful life of the asset are expensed as incurred. Major renewals and betterments of equipment are capitalized and depreciated generally over three to seven years until the next scheduled maintenance. The Company generally uses accelerated depreciation methods for tax purposes where appropriate. Dry-docking costs are capitalized and amortized on the straight-line method over a period ranging from three to 15 years. Dry-docking costs include, but are not limited to, the inspection, refurbishment and replacement of steel, engine components, tailshafts, mooring equipment and other parts of the vessel. Amortization related to dry-docking costs is included as a component of depreciation. These costs and the related amortization periods are periodically reviewed to determine if the estimates are accurate. If warranted, a significant upgrade of equipment may result in a revision to the useful life of the asset, in which case, the change is accounted for prospectively. Goodwill and Other Intangible Assets Goodwill Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually at a reporting unit level. The Company's reporting units are the same as its operating segments. Annual impairment tests of goodwill are performed as of October 31 of each year or when circumstances arise that indicate a possible impairment might exist. Tests of impairment require a two-step process to be performed to analyze whether or not goodwill has been impaired. The first step of this test, used to identify potential impairment, compares the estimated fair value of a reporting unit with its carrying amount. The second step, if necessary, quantifies the impairment. The Company assesses the fair value of its reporting units based on a weighted average of valuations based on market multiples, discounted cash flows, and consideration of its market capitalization. The key assumptions used in the discounted cash flow valuations are discount rates, weighted average cost of capital and perpetual growth rates applied to cash flow projections. Also inherent in the discounted cash flow valuation models are past performance, projections and assumptions in current operating plans, and revenue growth rates over the next five years. These assumptions contemplate business, market and overall economic conditions. Other considerations are assumptions that market participants may use and analysis of comparable companies. The underlying assumptions used for determining fair value require significant judgment and are susceptible to change from period to period and could potentially cause a material impact to the income statement. In the future, our estimated fair value could be negatively impacted by extended declines in our stock price, changes in macroeconomic indicators, sustained operating losses, and other factors which may affect our assessment of fair value. See Note 9 to the consolidated financial statements for additional discussion of our goodwill and related goodwill impairment testing. Intangible assets Intangible assets that have finite lives are amortized. In addition, the Company evaluates the remaining useful life of intangible assets in each reporting period to determine whether events and circumstances warrant a revision of the remaining period of amortization. If the estimate of an intangible asset’s remaining life is changed, the remaining carrying value of such asset is amortized prospectively over that revised remaining useful life. Intangible assets that have indefinite lives are not amortized, but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset more likely than not may be impaired. See Note 9 to the consolidated financial statements for additional discussion of our intangible assets and trade name impairment testing. Stock-Based Compensation The Company recognizes compensation expense for equity awards over the vesting period based on the fair value of these awards at the date of grant. The computed fair value of these awards is recognized as a non-cash cost over the period the employee provides services, which is typically the vesting period of the award. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of restricted stock grants is equivalent to the fair value of the stock issued on the date of grant, and is measured as the mean price of the stock on the day of grant. Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on historical experience and future expectations and this assessment is updated on a periodic basis. See Note 15 to the consolidated financial statements for further discussion of the Company’s stock-based compensation plan. Income Taxes The Company determines its consolidated income tax provision using the liability method prescribed by U.S. GAAP, which requires the recognition of income tax expense for the amount of taxes payable or refundable for the current period and for deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current provision for income taxes, its deferred tax assets and liabilities, and any valuation allowance to be recorded against any deferred tax asset. The current provision for income tax is based upon the current tax laws and the Company’s interpretation of these laws, as well as the probable outcomes of any tax audits. The value of any net deferred tax asset depends upon estimates of the amount and category of future taxable income reduced by the amount of any tax benefits that the Company does not expect to realize. Actual operating results and the underlying amount and category of income in future years could render current assumptions, judgments and estimates of recoverable net deferred taxes inaccurate, thus impacting the Company’s financial position and results of operations. The Company computes deferred income taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740-10 which prescribes a recognition threshold and measurement attribute for financial statement disclosure of tax positions taken, or expected to be taken, on its consolidated tax return. The Company evaluates and records any uncertain tax positions based on the amount that management deems is more likely than not to be sustained upon examination and ultimate settlement with the tax authorities in the tax jurisdictions in which it operates. Insurance Coverage The Company maintains insurance coverage for its business and operations. Insurance related to property, equipment, automobile, general liability, and a portion of workers' compensation is provided through traditional policies, subject to a deductible or deductibles. A portion of the Company's workers’ compensation exposure is covered through a mutual association, which is subject to supplemental calls. The heavy civil marine construction segment maintains five levels of excess loss insurance coverage, totaling $200.0 million in excess of primary coverage. This excess loss coverage responds to most of its liability policies when a primary limit of $1.0 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10.0 million and the Watercraft Pollution Policy primary limit is $5.0 million . The commercial concrete construction segment maintains two levels of excess loss insurance coverage, totaling $200.0 million in excess of primary coverage. This excess loss coverage responds to most of its liability policies when a primary limit of $1.0 million has been exhausted. Separately, the Company’s heavy civil marine construction segment employee health care is provided through a trust administered by a third party. Funding of the trust is based on current claims. The administrator has purchased appropriate stop-loss coverage. Losses on these policies up to the deductible amounts are accrued based upon known claims incurred and an estimate of claims incurred but not reported. The accruals are derived from known facts, historical trends and industry averages to determine the best estimate of the ultimate expected loss. Actual claims may vary from estimates. Any adjustments to such reserves are included in the consolidated results of operations in the period in which they become known. The Company's commercial concrete construction segment employee health care is provided through two policies. A fully funded policy is offered primarily to salaried employees and their dependents while a partially self-funded plan with an appropriate stop-loss is offered primarily to hourly employees and their dependents. The self-funded plan is funded to the maximum exposure and, as a result, expects to receive a partial refund after the policy expiration. The accrued liability for self-insured claims includes incurred but not reported losses of $5.2 million and $8.0 million at December 31, 2016 and 2015 , respectively. Warranty Costs Provision for estimated warranty costs, (if any) is made in the period in which such costs become probable and is periodically adjusted to reflect actual experience. The Company historically has not been subject to significant warranty provisions. Reclassifications Certain amounts in prior periods have been reclassified to conform with current period presentation. This includes an adjustment in prior periods to include debt issuance costs as a portion of debt on the balance sheet pursuant to the adoption of FASB Accounting Standard Update 2015-03, Simplifying the Presentation of Debt Issuance Costs . Additionally, the Company also determined that a gain or loss on the sale of an asset should be shown on the face of the income statement included as part of operating income based on ASC 360-10-45-5. Recent Accounting Pronouncements The FASB issues accounting standards updates (each, an "ASU") from time to time to its Accounting Standards Codification ("ASC"), which is the primary source of U.S. GAAP. The Company regularly monitors ASUs as they are issued and considers applicability to its business. All ASUs are adopted by their respective due dates and in the manner prescribed by the FASB. The following are those recently issued ASUs most likely to affect the presentation of the Company's consolidated financial statements: In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment. The FASB issued this update to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The amendments in this update modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. The guidance should be applied on a prospective basis and is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted and the Company does not anticipate that the changes will materially impact the financial statements unless a goodwill impairment is recognized in the future. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The FASB issued this update to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company is currently evaluating the impact to its financial statements but does not anticipate the changes to materially impact the financial statements. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The FASB issued this update as part of its Simplification Initiative. The areas for simplification in this update involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendment that will cause the most impact to our financial statements will be the change of presenting net operating loss carryforwards for tax purposes as a part of retained earnings as opposed to the current method of having them off balance sheet. The update allows for a modified retrospective approach so that the earliest period presented can be adjusted for the new standard. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those annual periods. The Company is currently evaluating the impact to its financial statements and plans to adopt in the first quarter of 2017. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The Board issued this update to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The Company anticipates the most significant of the amendments to our organization to be the recognition of assets and liabilities by lessees for those leases classified as operating leases under previous U.S. GAAP. Under the new standard the Company will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those annual periods. In early 2017, the Company established a steering committee to analyze the potential impact of the new standard and explore the possibility of potentially early adopting the new standard. The Company's ability to potentially early adopt will be dependent on the completion of the analysis of information necessary to adopt the standard. In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes. The Board issued this update as part of its initiative to reduce complexity in accounting standards. Current GAAP requires an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. The amendments in this update require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those annual periods. The Company does not expect a significant impact to its financial statements other than on working capital calculations. As of December 31, 2016, there was $2.0 million of deferred taxes included in current assets which under this update would be reclassified to long-term. In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory . The Board issued this update as part of its initiative to reduce complexity in accounting standards. The provisions of this guidance are that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company is evaluating the impact to its financial statements but does not anticipate this having a material impact. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . This comprehensive new revenue recognition standard will supersede existing revenue guidance under U. S. GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the cumulative catch-up transition method). The Company currently anticipates adopting the standard using the cumulative catch-up transition method which will involve recognizing in beginning retained earnings an adjustment for the cumulative effect of the change and providing additional disclosures comparing results to previous years. The Company established a steering committee consisting of representatives from various business segments within the organization. The purpose of this committee is to analyze the impact of the new standard on the Company's business by reviewing the current revenue practices to identify potential differences that would result from applying the requirements of the new standard to revenue contracts. In addition, the Company is analyzing the possibility of any necessary changes to current business processes, systems and controls to support recognition and disclosure under the new standard. The effective date of this guidance was deferred through the issuance of ASU 2015-14 and is effective for the Company beginning January 1, 2018. The impact of adopting the new standard is not expected to materially impact revenue or net income or the consolidated balance sheet. The Company expects the largest impact from the new standard to be on performance obligations within the contracts and the timing of revenue being recognized. The Company continues to evaluate all areas of the standard and its effect on the Company’s financial statements. During the periods presented in these financial statements, the Company implemented other new accounting pronouncements other than those noted above that are discussed in the notes where applicable.

Business Acquisition

Business Acquisition	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Business Acquisition	Business Acquisition On August 5, 2015, the Company completed its acquisition of all the issued and outstanding membership interests of T.A.S. Commercial Concrete Construction, LLC, T.A.S. Commercial Concrete Solutions, LLC, directly and indirectly all of the issued and outstanding membership interests of T.A.S. Proco, LLC, and 49% of the issued and outstanding membership interests of GLM Concrete Solutions, LLC, collectively known as "TAS" hereafter, which is headquartered in Houston, Texas, for approximately $112 million in cash. The purpose of the acquisition was primarily to achieve growth by expanding the Company's current service offerings in addition to expansion into new markets. The tangible assets acquired include accounts receivable, prepaid assets, work in progress and fixed assets. Under the acquisition method of accounting, the total acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of TAS based on their estimated fair values as of the closing of the acquisition. The table below outlines the total actual acquisition consideration allocated to the fair values of TAS’s tangible and intangible assets and liabilities as of August 5, 2015 and subsequent working capital adjustments: Accounts receivable $ 54,987 Costs and estimated earnings in excess of billings on uncompleted contracts 4,372 Prepaid expenses and other current assets 828 Fixed assets, net 15,720 Investment in GLM Concrete Services, LLC 76 Goodwill 33,817 Other intangible assets 33,650 Accounts payable (18,458 ) Accrued expenses and other current liabilities (13,015 ) Total Acquisition Consideration at August 5, 2015 $ 111,977 Working Capital Adjustment (1,633 ) Final Adjustment (1) 385 Total Acquisition Consideration $ 110,729 (1) On June 17, 2016, the Company and TAS agreed to an amendment of the original purchase agreement. The purpose of this amendment was to revise the total purchase price by $ 385 thousand for certain adjustments to post-closing items. The excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed was allocated to goodwill. The goodwill of $32.6 million arising from the acquisition consists primarily of synergies and business opportunities expected to be realized from the purchase of the Company. Goodwill for tax purposes is $32.6 million , which is amortizable over a 15 year period. Finite-lived intangible assets acquired include customer relationships and contractual backlog. Indefinite-lived intangible assets acquired include the trade name. (See Note 9 ) The fixed assets acquired include construction equipment, office equipment, building improvements, and automobiles and trucks and will be depreciated in accordance with Company policy, generally 3 to 15 years. The external costs associated with the transaction incurred and recorded during 2015 were approximately $400,000 and were included in selling, general and administrative expenses. Pro Forma Results (unaudited) The Company has calculated the pro forma impact of the acquisition of TAS in our operating results for the twelve months ended December 31, 2015 and 2014. The following pro forma results give effect to this acquisition, assuming the transaction occurred on January 1 of the respective period. Pro Forma Results For the Years Ended December 31, 2015 December 31, 2014 Contract Revenues $ 602,537 $ 622,063 Operating income from continuing operations $ 1,541 $ 23,062 Net Income $ 1,311 $ 13,399 Basic earnings per share $ 0.05 $ 0.49 Diluted earnings per share $ 0.05 $ 0.48 The Company derived the pro forma results of the acquisition based upon historical financial information obtained from the sellers and certain management assumptions. The pro forma adjustments related to incremental amortization expense associated with acquired finite-lived intangible assets and interest expense associated with borrowings to effect the transaction, assuming a January 1, 2014 effective transaction date. In addition, the tax impact of these adjustments was calculated at a 35% statutory rate. These pro forma results are not indicative of the results that would have been obtained had the acquisition of TAS been completed on January 1 of the respective period, or that may be obtained in the future.

Concentration of Risk and Enter

Concentration of Risk and Enterprise Wide Disclosures	12 Months Ended
	Dec. 31, 2016
Risks and Uncertainties [Abstract]
Concentration of Risk and Enterprise Wide Disclosures	Concentration of Risk and Enterprise Wide Disclosures Accounts receivable include amounts billed to governmental agencies and private customers and do not bear interest. Balances billed to customers but not paid pursuant to retainage provisions generally become payable upon contract completion and acceptance by the owner. The table below presents the concentrations of current receivables (trade and retainage) at December 31, 2016 and December 31, 2015 , respectively: December 31, 2016 December 31, 2015 Federal Government $ 5,542 4 % $ 4,230 4 % State Governments 9,302 7 % 1,274 1 % Local Governments 20,886 16 % 19,660 18 % Private Companies 96,673 73 % 82,627 77 % Total receivables $ 132,403 100 % $ 107,791 100 % At December 31, 2016 and 2015 , no single customer accounted for more than 10.0% of total current receivables. Additionally, the table below represents concentrations of revenue by type of customer for the year s ended December 31, 2016 , 2015 and 2014 . Year ended December 31, 2016 % 2015 % 2014 % Federal Government $ 40,361 7 % $ 45,439 10 % $ 47,390 13 % State Governments $ 37,700 7 % $ 42,026 9 % $ 43,147 11 % Local Governments $ 94,461 16 % $ 130,187 28 % $ 97,145 25 % Private Companies $ 405,714 70 % $ 248,846 53 % $ 198,136 51 % Total contract revenues $ 578,236 100 % $ 466,498 100 % $ 385,818 100 % In the year s ended December 31, 2016 , 2015 and 2014 , no single customer exceeded 10.0% of total contract revenues. The Company does not believe that the loss of any one of these customers would have a material adverse effect on the Company and its subsidiaries and affiliates since no single specific customer sustains such a large portion of receivables or contract revenue over time. In addition, the commercial concrete construction segment primarily purchases concrete from select suppliers. The loss of one of these suppliers could adversely impact short-term operations. Revenues generated outside the United States totaled 1.3% , 4.1% and 12.9% of total revenues for the years ended 2016 , 2015 and 2014 , respectively and were primarily located in the Caribbean.

Contracts in Progress

Contracts in Progress	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Contracts in Progress	Contracts in Progress Contracts in progress are as follows at December 31, 2016 and December 31, 2015 : December 31, December 31, Costs incurred on uncompleted contracts $ 802,140 $ 782,934 Estimated earnings 143,975 132,694 946,115 915,628 Less: Billings to date (933,828 ) (884,504 ) $ 12,287 $ 31,124 Included in the accompanying consolidated balance sheets under the following captions: Costs and estimated earnings in excess of billings on uncompleted contracts 39,968 $ 59,608 Billings in excess of costs and estimated earnings on uncompleted contracts (27,681 ) (28,484 ) $ 12,287 $ 31,124 Costs and estimated earnings in excess of billings on completed contracts, net of billings, totaled $0.6 million as of December 31, 2016 and 2015 . Contract costs include all direct costs, such as materials and labor, and those indirect costs related to contract performance such as payroll taxes and insurance. Changes in job performance, job conditions and estimated profitability may result in revisions to costs and income and are recognized in the period in which the revisions are determined. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined, without regard to the percentage of completion. Pending claims are recognized as an increase in contract revenue only when the collection is deemed probable and if the amount can be reasonably estimated.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment The following is a summary of property and equipment at December 31, 2016 and December 31, 2015 : December 31, December 31, Automobiles and trucks $ 2,525 $ 2,749 Building and improvements 37,269 28,226 Construction equipment 165,023 159,963 Vessels and other equipment 88,659 89,485 Office equipment 7,125 6,057 300,601 286,480 Less: accumulated depreciation (181,293 ) (164,371 ) Net book value of depreciable assets 119,308 122,109 Construction in progress 543 5,649 Land 38,231 38,231 $ 158,082 $ 165,989 For the years ended December 31, 2016 , 2015 and 2014 , depreciation expense was $26.9 million , $23.7 million and $23.5 million , respectively. Substantially all depreciation expense is included in the cost of contract revenue in the Company’s Consolidated Statements of Operations. Substantially all of the assets of the Company are pledged as collateral under the Company's Credit Agreement (as defined in Note 11 ). Substantially all of the Company’s long-lived assets are located in the United States. During 2015, the Company committed to a plan to review property and equipment within the heavy civil marine construction segment and adopted a plan to dispose of underutilized assets. These assets have been separately presented in the Consolidated Balance Sheets as “Assets held for sale” and are no longer depreciated. In connection with this disposal, the Company determined that the carrying value of certain of these assets exceeded its fair value, and consequently, the Company recorded an impairment loss of $1.7 million on those assets during 2015, which included any expected costs to sell. Additionally, various other assets were identified as underutilized and will be sold for salvage value. The Company recorded an impairment loss of $0.9 million on those assets. These losses are recorded in the “Other expense” section of the Consolidated Statements of Operations during the year ended December 31, 2015. Approximately $6.4 million remain as held for sale on the Company's Consolidated Balance Sheets at December 31, 2016 . The Company expects to dispose of the remaining assets within one year of the balance sheet date.

Inventory

Inventory	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventory	Inventory Current inventory at December 31, 2016 and December 31, 2015 , of $5.4 million and $4.9 million , respectively, consisted primarily of spare parts and small equipment held for use in the ordinary course of business. Non-current inventory at December 31, 2016 and December 31, 2015 totaled $4.0 million and $6.2 million , respectively, and consisted primarily of spare engine components or items which require longer lead times for sourcing or fabrication for certain of the Company's assets to reduce equipment downtime.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Recurring Fair Value Measurements The fair value of financial instruments is the amount at which the instrument could be exchanged in a current transaction between willing parties. Due to their short term nature, the Company believes that the carrying value of its accounts receivable, other current assets, accounts payable and other current liabilities approximate their fair values. The Company classifies financial assets and liabilities into the following three levels based on the inputs used to measure fair value in the order of priority indicated: • Level 1- fair values are based on observable inputs such as quoted prices in active markets for identical assets or liabilities; • Level 2 - fair values are based on pricing inputs other than quoted prices in active markets for identical assets and liabilities and are either directly or indirectly observable as of the measurement date; and • Level 3- fair values are based on unobservable inputs in which little or no market data exists. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value requires judgment and may affect the placement of assets and liabilities within the fair value hierarchy levels. The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2016 and December 31, 2015 : Fair Value Measurements Carrying Value Level 1 Level 2 Level 3 December 31, 2016 Assets: Cash surrender value of life insurance policy $ 1,188 — 1,188 — Liabilities: Derivatives $ 447 — 447 — December 31, 2015 Assets: Cash surrender value of life insurance policy $ 436 — 436 — Liabilities: Derivatives $ 235 — 235 — The Company's derivatives, which are comprised of interest rate swaps, are valued using a discounted cash flow analysis that incorporates observable market parameters, such as interest rate yield curves and credit risk adjustments that are necessary to reflect the probability of default by us or the counterparty. These derivatives are classified as a Level 2 measurement within the fair value hierarchy. See Note 11 for additional information on the Company's derivative instrument. Our commercial concrete segment has life insurance policies covering 4 employees with a combined face value of $11.1 million . The policies are invested in mutual funds and the fair value measurement of the cash surrender balance associated with these policies is determined using Level 2 inputs within the fair value hierarchy and will vary with investment performance. These assets are included in the "Other noncurrent" asset section in the consolidated balance sheets. Non-Recurring Fair Value Measurements The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to goodwill and indefinite-lived intangible assets. In 2015, the Company acquired the assets of TAS, which resulted in the valuation of acquired assets and liabilities on a non-recurring basis, classified as Level 3 in the fair value hierarchy, of which there are none in the current year. See Note 3 for further information associated with the values recorded in our TAS acquisition. Other Fair Value Measurements The fair value of the Company's debt at December 31, 2016 and 2015 approximated its carrying value of $104.6 million and $110.6 million , respectively, as interest is based on current market interest rates for debt with similar risk and maturity. If the Company's debt was measured at fair value, it would have been classified as Level 2 in the fair value hierarchy.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The table below summarizes changes in goodwill recorded by the Company during the periods ended December 31, 2016 and December 31, 2015 : December 31, December 31, Beginning balance, January 1 $ 65,982 $ 33,798 Additions 369 32,184 Ending balance $ 66,351 $ 65,982 At December 31, 2016 , goodwill totaled $66.4 million , of which $33.8 million relates to the heavy civil marine construction segment and $32.6 million relates to the commercial concrete construction segment. Additions to goodwill were attributable to the acquisition of TAS. The additions above represent goodwill calculated for the acquisition at the date of closing, less the working capital adjustment (See Note 3 ). As discussed previously in Note 2 , goodwill is reviewed for impairment annually as of October 31 at a reporting unit level. Step one of the October 31, 2016 goodwill impairment test resulted in no indication of impairment for either reporting unit, and no events have occurred since that date that would require an interim impairment test. Since our 2015 impairment test, market conditions affecting our heavy civil marine construction reporting unit have improved and our expectations of future cash flows has increased significantly, resulting in an increase in the fair value we determined for that reporting unit. However, if we are not successful in achieving our anticipated results, we may need to revise these expectations, which could result in a reduction in the fair value. To compensate for the risk in our projections, we used a discount rate commensurate for that risk. The discount rate used in testing goodwill for impairment for the heavy civil marine construction segment was 25.0% , and the fair value of the reporting unit exceeded carrying value by 33.3% . The fair value of the heavy civil marine construction reporting unit was $345.0 million , and the carrying value was $230.3 million . The discount rate used in testing goodwill for impairment for the commercial concrete construction reporting unit was 20.0% , and the fair value of the reporting unit exceeded carrying value by 4.2% . The fair value of the commercial concrete construction reporting unit was $126.0 million , and the carrying value was $120.7 million . Intangible assets The tables below present the activity and amortizations of finite-lived intangible assets: 2016 2015 Intangible assets, January 1 $ 34,362 $ 7,602 Additions — 26,760 Total intangible assets, end of year 34,362 34,362 Accumulated amortization, January 1 $ (11,933 ) $ (7,515 ) Current year amortization (7,287 ) (4,418 ) Total accumulated amortization (19,220 ) (11,933 ) Net intangible assets, end of year $ 15,142 $ 22,429 Finite-lived intangible assets were acquired as part of the purchase of TAS which included contractual backlog and customer relationships. Contractual backlog was valued at approximately $8.7 million and will be amortized over two years. Customer relationships were valued at approximately $18.1 million and will be amortized over eight years. Both of these assets will be amortized using an accelerated method based on the pattern in which the economic benefits of the assets are consumed. For the year ended December 31, 2016 , $7.3 million of amortization expense was recognized for these assets. In 2016, the Company evaluated the useful lives of these finite-lived intangible assets and no change was needed. Future expense remaining of approximately $15.1 million will be amortized as follows: 2017 $ 4,554 2018 3,168 2019 2,462 2020 1,955 2021 1,448 Thereafter 1,555 $ 15,142 Additionally, the Company has one indefinite-lived intangible asset, a trade name, which is tested for impairment annually on October 31, or whenever events or circumstances indicate that the carrying amount of the trade name may not be recoverable. Impairment is calculated as the excess of the trade name’s carrying value over its fair value. The fair value of the trade name is determined using the relief from royalty method, a variation of the income approach. This method assumes that if a company owns intellectual property it does not have to "rent" the asset and is, therefore, "relieved" from paying a royalty. Once a supportable royalty rate is determined, the rate is then applied to the projected revenues over the expected remaining life of the intangible assets to estimate the royalty savings. This approach is dependent on a number of factors, including estimates of future growth and trends, royalty rates, discount rates and other variables. The impairment test concluded that the fair value of the trade name was $9.9 million , and the carrying value was $6.9 million , therefore no impairment was recorded.

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities Accrued liabilities at December 31, 2016 and 2015 consisted of the following: 2016 2015 Accrued salaries, wages and benefits $ 10,818 $ 8,115 Accrual for self-insurance liabilities 5,223 7,998 Property taxes 1,615 2,020 Sales tax 1,722 1,991 Interest 19 112 Payable to TAS Seller — 728 Other accrued expenses 549 1,185 $ 19,946 $ 22,149

Long-term Debt and Line of Cred

Long-term Debt and Line of Credit	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Long-term Debt and Line of Credit	Long-term Debt and Line of Credit The Company entered into a syndicated credit agreement (the "Credit Agreement") on August 5, 2015 with Regions Bank, as administrative agent and collateral agent, and the following co-syndication agents: Bank of America, N.A., BOKF, NA dba Bank of Texas, Branch Banking & Trust Company, Frost Bank, Bank Midwest, a division of NBH Bank, N.A., IBERIABANK, KeyBank NA, Trustmark National Bank, and First Tennessee Bank NA. The primary purpose of the Credit Agreement was to finance the acquisition of TAS, to provide a revolving line of credit, and to provide financing to extinguish all prior indebtedness with Wells Fargo Bank, National Associates, as administrative agent, and Wells Fargo Securities, LLC. The Credit Agreement, which may be amended from time to time, provides for borrowings under a revolving line of credit and swingline loans with a commitment amount of $50.0 million and a term loan with a commitment amount of $135.0 million (together, the “Credit Facility”). The Credit Facility is guaranteed by the subsidiaries of the Company, secured by the assets of the Company, including stock held in its subsidiaries, and may be used to finance general corporate and working capital purposes, to finance capital expenditures, to refinance existing indebtedness, to finance permitted acquisitions and associated fees, and to pay for all related expenses to the Credit Facility. Interest is due and is computed based on the designation of the loan, with the option of a Base Rate Loan (the base rate plus the Applicable Margin), or an Adjusted LIBOR Rate Loan (the adjusted LIBOR rate plus the Applicable Margin). Interest is due on the last day of each quarter end for Base Rate Loans and at the end of the LIBOR rate period for Adjusted LIBOR Rate Loans. The rate for all loans, at the time of loan origination was 4.75% . Principal balances drawn under the Credit Facility may be prepaid at any time, in whole or in part, without premium or penalty. Amounts repaid under the revolving line of credit may be re-borrowed. The Credit Facility matures on August 5, 2020. Total debt issuance costs, which included underwriter fees, legal fees and syndication fees were approximately $4.5 million . During the first quarter of 2016, the Company executed the First Amendment of the Credit Agreement and additional costs were incurred of approximately $0.5 million . These costs were initially capitalized as non-current deferred charges and amortized using the effective interest rate method over the duration of the loan. During the first quarter of 2016, the Company adopted ASU 2015-03, Interest - Imputation of Interest, Simplifying the Presentation of Debt Issuance Costs . Upon adoption of this guidance, debt issuance costs are now presented as a direct deduction from the carrying amount of the debt liability, of which $0.6 million was allocated to current debt and $2.7 million was allocated to long-term debt as of December 31, 2016 . As of December 31, 2015, $0.5 million was allocated to current debt and $3.6 million was allocated to long-term debt. The quarterly weighted average interest rate for the Credit Facility as of December 31, 2016 was 3.35% . The Company's obligations under debt arrangements consisted of the following: December 31, 2016 December 31, 2015 Principal Debt Issuance Costs (1) Total Principal Debt Issuance Costs (1) Total Revolving line of credit $ 8,000 $ (252 ) $ 7,748 $ 4,021 $ (147 ) $ 3,874 Term loan - current 11,813 (373 ) 11,440 8,438 (308 ) 8,130 Total current debt 19,813 (625 ) 19,188 12,459 (455 ) 12,004 Term loan - long-term 84,750 (2,673 ) 82,077 98,188 (3,583 ) 94,605 Total debt $ 104,563 $ (3,298 ) $ 101,265 $ 110,647 $ (4,038 ) $ 106,609 (1) Total debt issuance costs, include underwriter fees, legal fees and syndication fees and fees related to the execution of the First Amendment to the Credit Agreement as previously discussed. Provisions of the revolving line of credit and accordion T he Company has a maximum borrowing availability under the revolving line of credit and swingline loans (as defined in the Credit Agreement) of $50.0 million . The letter of credit sublimit is equal to the lesser of $20.0 million and the aggregate unused amount of the revolving commitments then in effect. The swingline sublimit is equal to the lesser of $5.0 million and the aggregate unused amount of the revolving commitments then in effect. Revolving loans may be designated as Base Rate Loan or Adjusted LIBOR Rate Loans, at the Company’s request, and must be made in an aggregate minimum amount of $1.0 million and integral multiples of $250,000 in excess of that amount. Swingline loans must be made in an aggregate minimum amount of $250,000 and integral multiples of $50,000 in excess of that amount. The Company may convert, change, or modify such designations from time to time. The Company is subject to a Commitment Fee for the unused portion of the maximum available to borrow under the revolving line of credit . The Commitment Fee, which is due quarterly in arrears, is equal to the Applicable Margin of the actual daily amount by which the Aggregate Revolving Commitments exceeds the Total Revolving Outstanding. The revolving line of credit termination date is the earlier of the Credit Facility termination date, August 5, 2020, or the date the outstanding balance is permanently reduced to zero. The Company has the intent and ability to repay the amounts outstanding on the revolving credit facility within one year, therefore, the outstanding balance as of December 31, 2016 has been classified as current. As of December 31, 2016 , the outstanding balance on the revolving line of credit was $8.0 million and was designated as an Adjusted LIBOR Rate Loan at a rate of 3.13% . There were also $1.3 million in outstanding letters of credit as of December 31, 2016 , which reduced the maximum borrowing availability on the revolving line of credit to $40.7 million as of December 31, 2016 . The Company made payments of approximately $53.0 million on the outstanding revolving balance during 2016. Subsequent to 2016, the Company drew $10.0 million on the revolving line of credit. Provisions of the term loan The original principal amount of $135.0 million for the term loan commitment shall be repaid in quarterly installment payments (as stated in the Credit Agreement). At December 31, 2016, the outstanding term loan component of the Credit Facility totaled $96.6 million and was secured by specific assets of the Company.The table below outlines the total remaining payment amounts annually for the term loan through maturity of the Credit Facility: 2017 11,813 2018 13,500 2019 15,188 2020 56,062 $ 96,563 The Company made the scheduled quarterly principal payments of $ 8.4 million and additional payments of $1.6 million during 2016 , which reduced the outstanding principal balance to $96.6 million at December 31, 2016 . The current portion of debt is $11.8 million and the non-current portion is $84.8 million . As of December 31, 2016 , the term loan was designated as an Adjusted LIBOR Rate Loan with an interest rate of 3.13 %. Financial covenants Restrictive financial covenants under the Credit Facility include: • A consolidated Fixed Charge Coverage Ratio as of the end of any fiscal quarter to not be less than 1.25 to 1.00. • A consolidated Leverage Ratio to not exceed the following during each noted date: -Closing Date through and including December 31, 2015, to not exceed 3.25 to 1.00; -Fiscal Quarter Ending March 31, 2016, to not exceed, to not exceed 4.00 to 1.00; -Fiscal Quarter Ending June 30, 2016, to not exceed, to not exceed 3.75 to 1.00; -Fiscal Quarter Ending September 30, 2016, to not exceed 3.25 to 1.00. -Fiscal Quarter Ending December 31, 2016, to not exceed 3.00 to 1.00; -Fiscal Quarter Ending March 31, 2017, to not exceed 2.75 to 1.00; -Fiscal Quarter Ending June 30, 2017 and each Fiscal Quarter thereafter, to not exceed 2.50 to 1.00. As of December 31, 2016 , the Company was in compliance with all financial covenants. In addition, the Credit Facility contains events of default that are usual and customary for similar transactions, including non-payment of principal, interest or fees; breaches of representations and warranties that are not timely cured; violation of covenants; bankruptcy and insolvency events; and events constituting a change of control. The Company expects to meet its future internal liquidity and working capital needs, and maintain or replace its equipment fleet through capital expenditure purchases and major repairs, from funds generated by its operating activities for at least the next 12 months. The Company believes that its cash position and available borrowings together with cash flow from its operations is adequate for general business requirements and to service its debt. Derivative Financial Instruments On September 16, 2015 , the Company entered into a series of receive-variable, pay-fixed interest rate swaps to hedge the variability in the interest payments on 50% of the aggregate principal amount of the Regions Term Loan outstanding, beginning with a notional amount of $67.5 million . There are a total of five sequential interest rate swaps to achieve the hedged position and each year on August 31, with the exception of the final swap, the existing interest rate swap is scheduled to expire and will be immediately replaced with a new interest rate swap until the expiration of the final swap on July 31, 2020. At inception, these interest rate swaps were designated as a cash flow hedge for hedge accounting, and as such, the effective portion of unrealized changes in market value are recorded in accumulated other comprehensive (loss) income and reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. Gains and losses from hedge ineffectiveness are recognized in current earnings. The change in fair market value of the swaps as of December 31, 2016 is $0.4 million , which is reflected in the balance sheet as a liability. The fair market value of the swaps as of December 31, 2016 is $0.4 million .

Purchase of Common Shares

Purchase of Common Shares	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Purchase of Common Shares	Purchase of Common Shares In October 2014, the Board of Directors of the Company approved a common share repurchase program that authorized the repurchase of up to $40.0 million in open market value. The shares may be repurchased over time, depending on market conditions, the market price of the Company's common shares, the Company's capital levels, the Company's capital needs, securities laws and limitations, and other considerations. The share repurchase program is expected to expire five years from the date the program was approved. As of December 31, 2015 , the Company repurchased 350,000 shares at an average price of $8.83 . The Company did not repurchase any shares during 2016.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents the components of our consolidated income tax expense (benefit) for the years ended December 31, 2016 , 2015 and 2014 : Current Deferred Total Year ended December 31, 2016 U.S. Federal $ 35 $ (1,093 ) $ (1,058 ) State and local 511 $ 1,519 $ 2,030 Foreign 284 325 609 $ 830 $ 751 $ 1,581 Year ended December 31, 2015 U.S. Federal $ 3 $ (3,768 ) $ (3,765 ) State and local (60 ) 883 823 Foreign 423 — 423 $ 366 $ (2,885 ) $ (2,519 ) Year ended December 31, 2014 U.S. Federal $ 247 $ 2,571 $ 2,818 State and local 599 (702 ) (103 ) Foreign 460 — 460 $ 1,306 $ 1,869 $ 3,175 The Company’s income tax provision reconciles to the provision at the statutory U.S. federal income tax rate for each year ended December 31, as follows: 2016 2015 2014 Statutory amount (computed at 35%) $ (714 ) $ (3,703 ) $ 3,519 State income tax, net of federal benefit 94 (709 ) (312 ) Permanent differences 99 43 122 Permanent differences, incentive stock options 224 298 157 True up to prior year taxes 109 — (311 ) Valuation Allowance 1,769 1,552 — Consolidated income tax provision $ 1,581 $ (2,519 ) $ 3,175 Consolidated effective tax rate (77.5 )% 23.8 % 31.6 % In the current year, the Company's effective tax rate differed from the statutory rate of 35% primarily due to the recognition of a valuation allowance on certain state NOLs, as described below, as well as state income taxes, and the non-deductibility of certain permanent tax items, such as incentive stock compensation expense. The Company’s deferred tax assets and liabilities are as follows: December 31, 2016 December 31, 2015 Current Long- term Current Long- term Assets related to: Accrued liabilities $ 2,322 $ — $ 3,073 $ — Intangible assets — 4,517 — 2,983 Net operating loss carryforward — 7,455 — 4,597 Valuation allowance — (3,321 ) — (1,552 ) Non-qualified stock options 112 1,367 31 1,354 Foreign tax credits — 2,035 — 1,501 AMT credits — 780 — 995 Other 45 16 44 32 Total assets 2,479 12,849 3,148 9,910 Liabilities related to: Depreciation and amortization — (25,326 ) — (24,309 ) Goodwill — (6,502 ) — (4,933 ) Deferred revenue on maintenance contracts (429 ) — (8 ) — Other (37 ) (21 ) (32 ) (13 ) Total liabilities (466 ) (31,849 ) (40 ) (29,255 ) Net deferred assets (liabilities) $ 2,013 $ (19,000 ) $ 3,108 $ (19,345 ) As reported in the balance sheets: December 31, 2016 December 31, 2015 Net current deferred tax assets 2,013 3,108 Net non-current deferred tax liabilities (19,000 ) (19,345 ) Total net deferred tax liabilities: $ (16,987 ) $ (16,237 ) The Company assessed the realizability of its deferred tax assets at December 31, 2016 , and considered whether it was more likely than not that some portion or all of the deferred tax assets will not be realized. The realization of deferred tax assets depends upon the generation of future taxable income, which includes the reversal of deferred tax liabilities related to depreciation, during the periods in which these temporary differences become deductible. The Company has a tax effected net operating loss carryforward ("NOL") in 2016 of $4.2 million for state income tax reporting purposes due to the losses sustained in various states. The Company believes it will be able to partially utilize these NOLs against future income primarily with reversing of temporary differences attributable to depreciation, due to expiration dates well into the future. However, the Company has determined that a portion of the NOLs related to certain jurisdictions will more likely than not be able to be fully utilized. Therefore, a valuation allowance of $3.3 million was established for this portion of the NOL. For federal tax purposes, the Company has utilized its ability to carry losses back prior to 2016 . Approximately $11.2 million remains as a federal tax carryforward, which the Company believes it will be able to utilize before expiration. As of December 31, 2016 the Company had approximately $0.8 million of alternative minimum tax credits available that do not expire. In addition, excess tax benefits of approximately $2.0 million associated with the vesting of restricted stock awards and other stock options are included in the federal net operating loss carryovers stated previously. The Company and its subsidiaries file consolidated federal income tax returns in the United States and also file in various states. With few exceptions, the Company remains subject to federal and state income tax examinations for the years of 2013, 2014, and 2015. The Company’s policy is to recognize interest and penalties related to any unrecognized tax liabilities as additional tax expense. No interest or penalties have been accrued at December 31, 2016 and 2015, as the Company has not recorded any uncertain tax positions. The Company believes it has appropriate and adequate support for the income tax positions taken and to be taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors including past experience and interpretations of tax law applied to the facts of each matter. Although the Company believes its recorded assets and liabilities are reasonable, tax regulations are subject to interpretation and tax litigation is inherently uncertain; therefore the Company’s assessments can involve both a series of complex judgments about future events and rely heavily on estimates and assumptions. Although the Company believes that the estimates and assumptions supporting its assessments are reasonable, the final determination of tax audit settlements and any related litigation could be materially different from that which is reflected in historical income tax provisions and recorded assets and liabilities. If the Company were to settle an audit or a matter under litigation, it could have a material effect on the income tax provision, net income, or cash flows in the period or periods for which that determination is made. Any accruals for tax contingencies are provided for in accordance with U.S. GAAP . The Company does not believe that its tax positions will significantly change due to any settlement and/or expiration of statutes of limitations prior to December 31, 2017 .

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share Basic earnings (loss) per share are based on the weighted average number of common shares outstanding during each period. Diluted earnings per share are based on the weighted average number of common shares outstanding and the effect of all dilutive common stock equivalents during each period. The exercise price for certain stock options awarded by the Company exceeds the average market price of the Company's common stock. Such stock options are antidilutive and are not included in the computation of earnings (loss) per share. For the year ended December 31, 2016 and 2015 no potential common stock equivalents were included in the computation and in 2014 incremental shares of 801,441 were included in the computation of diluted earnings per share. For the years ended December 31, 2016 , 2015 and 2014 , the Company had 2,381,926 , 2,043,375 , and 1,994,818 , securities, respectively, that were potentially dilutive in future earnings per share calculations. Such dilution will be dependent on the excess of the market price of our stock over the exercise price and other components of the treasury stock method. The following table reconciles the denominators used in the computations of both basic and diluted (loss) earnings per share: Year ended December 31, 2016 2015 2014 Basic: Weighted average shares outstanding 27,536,967 27,366,528 27,421,441 Diluted: Total basic weighted average shares outstanding 27,536,967 27,366,528 27,421,441 Effect of dilutive securities: Common stock options — — 366,172 Total weighted average shares outstanding assuming dilution 27,536,967 27,366,528 27,787,613 Anti-dilutive stock options — — 801,441 Shares of common stock issued from the exercise of stock options 13,850 3,970 143,282

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Compensation Committee of the Company’s Board of Directors is responsible for the administration of the Company’s stock incentive plans, which include the balance of shares remaining under the 2007 Long Term Incentive Plan (the "2007 LTIP) and the 2011 Long Term Incentive Plan (the "2011 LTIP") which was approved by the shareholders in May 2011 and authorized the maximum aggregate number of shares to be issued of 3,000,000 . In general, the Company's 2011 LTIP plan provides for grants of restricted stock and stock options to be issued with a per-share price equal to the fair market value of a share of common stock on the date of grant. Option terms are specified at each grant date, but are generally are 10 years from the date of issuance. Options generally vest over a three to five year period. Restricted Stock The following table summarizes the restricted stock activity under the Company's equity incentive plans : Number of Shares Weighted Average Fair Value Per Share Nonvested at January 1, 2014 217,045 $ 6.60 Granted 115,726 $ 11.35 Vested (96,908 ) $ 7.35 Forfeited/repurchased shares — $ — Nonvested at December 31, 2014 235,863 $ 8.63 Granted 38,660 $ 5.82 Vested (134,545 ) $ 6.84 Forfeited/repurchased shares (19,824 ) $ 11.35 Nonvested at December 31, 2015 120,154 $ 9.28 Granted 407,002 $ 4.96 Vested (147,259 ) $ 6.62 Forfeited/repurchased shares (7,591 ) $ 7.08 Nonvested at December 31, 2016 372,306 $ 5.66 Independent directors receive equity compensation in the form of grants. In May 2016, the independent directors received equity compensation grants of 14,170 shares, with a fair value of $4.94 per share and in November 2014, the Company's independent directors received equity compensation grants of 6,167 shares, with a fair value of $11.35 per share. Additionally, in 2016, certain officers and executives of the Company were awarded 267,175 shares with a vesting period of three years and a weighted average fair value of $4.96 per share and in November 2014, certain officers and executives of the Company were awarded 84,891 shares with a vesting period of three years and a fair value of $11.35 per share. No shares were granted to independent directors, officers or executives of the Company during 2015, except for the chief operating officer who joined the Company in September 2015. Upon execution of his employment agreement, he was awarded 38,660 shares, with a vesting period of three years and a fair value of $5.82 per share. Performance Stock In May 2016, the Company awarded certain executives 68,977 shares of performance based stock, which vest based on the achievement of an objective return on invested capital measured over a two-year performance period covering the 2017 and 2018 fiscal years. The fair value on the date of the grant was $4.94 per share. Stock Options The following table summarizes the stock option activity under the Company's equity incentive plans: Number of Shares Weighted Average Exercise Price Per Share Weighted Average Contractual Life (Years) Aggregate Intrinsic Value Outstanding at January 1, 2014 2,071,757 $ 9.49 Granted 233,828 $ 11.35 Exercised (143,282 ) $ 6.08 Forfeited (105,405 ) $ 11.06 Outstanding at December 31, 2014 2,056,898 $ 9.86 Granted 143,862 $ 5.82 Exercised (3,970 ) $ 6.00 Forfeited (46,890 ) $ 11.72 Outstanding at December 31, 2015 2,149,900 $ 9.56 Granted 587,862 $ 4.98 Exercised (13,850 ) $ 4.86 Forfeited (374,466 ) $ 9.89 Outstanding at December 31, 2016 2,349,446 $ 8.39 Vested and expected to vest at December 31, 2016 2,308,956 $ 8.32 5.24 $ 6,970 Exercisable at December 31, 2016 1,627,204 $ 9.61 3.67 $ 3,897 The Company calculates the fair value of each option on the date of grant using the Black-Scholes pricing model and the following weighted-average assumptions in each year: 2016 2015 2014 Weighted average grant-date fair value of options granted $ 4.97 $ 5.82 $ 6.40 Risk-free interest rate 1.06 % 0.97 % 1 % Expected volatility 49 % 38 % 88.5 % Expected term of options (in years) 3.0 3.0 3.0 Dividend yield — % — % — % The risk-free interest rate is based on interest rates on U.S. Treasury zero-coupon issues that match the contractual terms of the stock option grants. The expected term represents the period in which the Company’s equity awards are expected to be outstanding, which for the years presented is based on the exercise history. For years ended December 31, 2016 , 2015 and 2014 , compensation expense related to stock based awards outstanding for the periods was $2.3 million , $2.3 million and $1.6 million , respectively. The Company applies a 3.2% and 5.5% forfeiture rate, which gets compounded over the vesting terms of the individual award, to its restricted stock and option grants, respectively, based on historical analysis. During the year ended December 31, 2016 , certain officers and executives of the Company were awarded 587,862 options with a vesting period of three years and a weighted average fair value of $4.98 per share, and for the year ended December 31, 2014, certain officers and executives were awarded 233,828 options with a vesting period of three years and a fair value of $11.35 per share. No options were awarded to officers or executives of the Company as of the year ended December 31, 2015, except for the chief operating officer who joined the Company in September 2015. Upon execution of his employment agreement, he was granted 143,862 shares, with a vesting period of three years and a fair value of $5.82 per share. In the year ended December 31, 2016 , the Company received proceeds of approximately $67,000 upon the exercise of 13,850 options. In the year ended December 31, 2015 , proceeds of $28,000 upon the exercise of 3,970 options and in the year ended December 31, 2014 , 143,282 options were exercised, generating proceeds of $869,000 . As of December 31, 2016 , there was $2.7 million of unrecognized compensation cost, net of estimated forfeitures, related to the Company’s non-vested equity awards, which is expected to be recognized over a weighted average period of 2.0 years. 2016 2015 2014 Total intrinsic value of options exercised $ 53 $ 17 $ 494 Total fair value of shares vested $ 986 $ 1,226 $ 923

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	Employee Benefits All of the Company's heavy civil marine construction segment employees except the Associate Divers, the Associate Tugmasters, and union employees in the Pacific Northwest, are eligible to participate in the Company’s 401(k) Retirement Plan after completing six months of service. Each participant may contribute between 1% and 80% of eligible compensation on a pretax basis, up to the annual IRS limit. The Company matches 100% on the first 2% of eligible compensation contributed to the Plan and 50% on the next 2% of eligible compensation contributed to the Plan. Participants’ contributions are fully vested at all times. Employer matching contributions vest over a four -year period. At its discretion, the Company may make additional matching and profit-sharing contributions. During the years ended December 31, 2016 , 2015 and 2014 the Company contributed $1.4 million , $1.4 million and $ 1.2 million to the Plan, respectively. All of the Company's commercial concrete construction segment employees except Leads, Helpers, Laborers, Finishers, Formsetters, Carpenters, Rodbusters, Patchmen, Equipment Operators, Field Engineering Trainees and certain Highly Compensated Employees are eligible to participate in the AGC Southwest Chapters 401(k) Retirement Plan, a multiple employer plan, after completing three months of service. Each participant may contribute up to the annual IRS limit. The Company matches 50% on the first 6% of eligible compensation contributed to the Plan. Participants’ contributions are fully vested at all times. Employer matching contributions vest over a five-year period. At its discretion, the Company may make additional matching and profit-sharing contributions. During the year ended December 31, 2016 and 2015 , the Company contributed $0.2 million and $0.1 million , respectively. The Company's heavy civil marine construction segment contributes to several multiemployer defined pension plans under the terms of collective-bargaining agreements that cover its union-represented employees. Risks of participating in these multiemployer plans are different from single-employer plans in the following aspects: • Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers. • If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. • If the Company chooses to stop participating in its multiemployer plans, it may be required to pay a withdrawal liability based on the underfunded status of the plan. Currently, the Company's commercial concrete construction segment does not have union represented employees and, thus, does not participate under the above-mentioned defined pension plans, or any other plans, that cover union-represented employees. The following table presents the Company's participation in these plans: Pension Plan Pension Protection Act ("PPA") FIP/RP Expiration Pension Trust Employer Certified Zone Status (1) Status Contributions Surcharge of Collective Fund Identification Number 2016 2015 P/I (2) 2016 2015 2014 Imposed Bargaining Agreement International Union of Operating Engineers - Employers Construction Industry Retirement Plan - Local 302 and 612 Trust Funds 91-6028571 Green Green N/A $ 2,158 $ 1,518 $ 1,295 — 2018 Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights 91-6029051 91-6029049 Green Green N/A $ 938 $ 748 $ 737 — 2018 Alaska Carpenters Trust Fund 92-0120866 Green Green N/A $ 889 $ 807 $ 1,044 — 2017 Alaska Laborers Trust Fund 91-6028298 Yellow Orange P $ 126 $ 110 $ 246 — 2017 1. The most recent PPA zone status available in 2016 and 2015 is for the plan's year end during 2015 and 2014, respectively. Zone status is based on information received from the plan and is indicative of the plans funding status. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the orange zone are less than 80 percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next six years, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded. 2. The FIP/RP Status P/I column indicates plans for which a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending ("P"), or implemented ("I"). There are currently no plans to withdraw from any of the multiemployer plans in which the Company participates.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases In July 2005, the Company executed a sale-leaseback transaction in which it sold an office building for $2.1 million and entered into a ten year lease agreement. The sale of the office building resulted in a gain of $562,000 which has been deferred and amortized over the life of the lease. The Company recognized approximately $8,000 for the year ending 2015 and and $56,000 for the year ending 2014 , respectively. Scheduled increases in monthly rent are included in the lease agreement. Rent expense under this agreement was approximately $85,000 and $173,000 for the years ending December 31, 2015 and 2014 , respectively. The Company, at its option, can extend the lease for two additional five year terms. However, the Company opted not to renew the lease and it expired on July 1, 2015. In 2005, the Company entered into a lease agreement for vehicles under a continuing operating lease agreement. Rental expense under this lease for the years ended December 31, 2016 , 2015 and 2014 was $1.5 million , $2.3 million , and $2.9 million , respectively. In 2016, the Company started transitioning its vehicle leases to a new lease agreement in an effort to update and expand its current fleet. The Company expects to fully transition all of its fleet vehicles to this new lease over the course of the next several years. Rental expense under this lease for the year ended December 31, 2016 , was $1.0 million . The Company leases its corporate office in Houston, Texas under a lease with an initial term of nine years. In addition, the Company leases other facilities, including office space and yard facilities, under terms that range from one to five years. The Company also leases short-term field office space at its various construction sites for the duration of the projects. Future minimum lease payments under non-cancelable operating leases as of December 31, 2016 are as follows: Amount Year ended December 31, 2017 $ 7,274 2018 6,194 2019 5,233 2020 4,350 2021 2,746 Thereafter 14,531 $ 40,328 Litigation From time to time the Company is a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, the Company accrues reserves 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 adverse effect on results of operations, cash flows or financial condition.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Reporting	Segment Information The Company currently operates in two reportable segments: heavy civil marine construction and commercial concrete construction. 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: Year Ended December 31, 2016 Year Ended December 31, 2015 Heavy Civil Marine Construction Contract revenues $ 284,632 $ 347,117 Operating loss (12,403 ) (14,243 ) Depreciation and amortization expense (21,398 ) (21,075 ) Total Assets $ 279,362 $ 315,869 Property, Plant and Equipment, net 143,425 150,117 Commercial Concrete Construction Contract revenues $ 293,604 $ 119,381 Operating income 16,477 6,244 Depreciation and amortization expense (12,764 ) (7,008 ) Total Assets $ 168,314 $ 145,593 Property, Plant and Equipment, net 14,657 15,872 There were no intersegment revenues between the Company's two reportable segments for the years ended December 31, 2016 and 2015. The heavy civil marine construction segment had foreign revenues of $7.4 million and $18.9 million for the years ended December 31, 2016 and 2015 . These revenues are derived from projects in Mexico and the Caribbean and are paid in U.S. dollars. There was no foreign revenue for the commercial concrete construction segment.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Upon the completion of the acquisition of TAS, the Company entered into a lease arrangement with an entity in which an employee owns an interest. This lease is for office space and yard facilities used by the commercial concrete construction segment. Annual lease expense was approximately $820,000 and $312,500 for the years ending December 31, 2016 and 2015 , respectively. GLM Concrete Solutions, LLC (“GLM”), of which the Company owns 49% of the issued and outstanding membership interests, employs certain employees that are subcontracted to TAS, a wholly owned subsidiary of the Company, for certain projects. As of December 31, 2016 and December 31, 2015 , payroll expense related to these subcontracted employees was $0.7 million and $0.7 million , respectively. Additionally, GLM provides certain management services to TAS, including safety, human resources and project management. As of December 31, 2016 and December 31, 2015 management expense for these services was $0.5 million and $0.7 million , respectively. On August 31, 2015, the Company completed an acquisition of all of the issued and outstanding stock of and any and all other equity interests in Preferred Tool Services, Inc. (a.k.a. Houston Industrial Tool Services, Inc. ("HITS")) from an employee of the Company for aggregate consideration of $400,000 .

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data	Selected Quarterly Financial Data The following tables set forth selected unaudited financial information for the eight quarters in the two-year period ended December 31, 2016. This information has been prepared on the same basis as the audited financial statements and, in the opinion of management, contains all adjustments necessary for a fair presentation. First Quarter Second Quarter Third Quarter Fourth Quarter Total Year (in thousands, except per share data) 2016 Revenues $ 129,623 $ 140,301 $ 164,017 $ 144,295 $ 578,236 Gross profit 14,710 16,946 24,169 11,657 67,482 Operating (loss) income (455 ) 281 9,531 (5,283 ) 4,074 (Loss) income before income taxes (1,958 ) (1,310 ) 7,963 (6,734 ) (2,039 ) Net (loss) income (1,208 ) (808 ) 4,739 (6,343 ) (1) (3,620 ) (Loss) earnings per share: Basic $ (0.04 ) $ (0.03 ) $ 0.17 $ (0.23 ) $ (0.13 ) Diluted $ (0.04 ) $ (0.03 ) $ 0.17 $ (0.23 ) $ (0.13 ) First Quarter Second Quarter Third Quarter Fourth Quarter Total Year (in thousands, except per share data) 2015 Revenues $ 81,455 $ 86,091 $ 137,061 $ 161,891 $ 466,498 Gross profit 8,456 6,025 8,278 17,423 40,182 Operating (loss) income (193 ) (2,712 ) (8,325 ) 3,231 (7,999 ) (Loss) income before income taxes (419 ) (2,960 ) (9,065 ) 1,865 (10,579 ) Net (loss) income (258 ) (1,845 ) (7,396 ) 1,439 (8,060 ) (Loss) earnings per share: Basic $ (0.01 ) $ (0.07 ) $ (0.27 ) $ 0.06 $ (0.29 ) Diluted $ (0.01 ) $ (0.07 ) $ (0.27 ) $ 0.06 $ (0.29 ) (1) - Fourth quarter 2016 net loss includes $0.8 million of tax expense that represents an out of period adjustment associated with deferred taxes. Management evaluated the effect of the adjustment on the Company's financial statements based on SEC Staff Accounting Bulleting ("SAB") No. 99 and SAB 108 and concluded that it was immaterial to the current and prior year's financial statements.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Dollars in thousands) Description Balance at the Beginning of the Period Charged to Revenue, Cost or Expense Deduction Balance at the End of the Period Year ended December 31, 2014 Provision for Doubtful Accounts $ — $ 993 $ (993 ) $ — Year ended December 31, 2015 Provision for Doubtful Accounts $ — $ 22 $ (22 ) $ — Year ended December 31, 2016 Provision for Doubtful Accounts $ — $ — $ — $ —

Summary of Significant Accoun30

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These consolidated financial statements include the accounts of the parent company, Orion Group Holdings, Inc. and its wholly-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America. All intercompany balances and transactions have been eliminated in consolidation.
Revenue Recognition	Revenue Recognition For financial statement purposes, the Company records revenue on construction contracts for financial statement purposes on the percentage-of-completion method, measured by the percentage of contract costs incurred to date to total estimated costs for each contract. This method is used because management considers contract costs incurred to be the best available measure of progress on these contracts. Contract revenue is derived from the original contract price adjusted for agreed upon change orders. Contract costs include all direct costs, such as material and labor, and those indirect costs we incur that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Pending claims are recognized as an increase in contract revenue only when the collection is deemed probable and if the amount can be reasonably estimated for purposes of calculating total profit or loss on long-term contracts. The Company records revenue and the unbilled receivable for claims to the extent of costs incurred and to the extent management believes related collection is probable and includes no profit on claims recorded. During 2016 , in accordance with ASC 605-35-25-30, the Company recognized claims of approximately $12.3 million with customers. The Company believes collection of these claims is probable, although the full amount of the recorded claims may not be recognized. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and revenues and are recognized in the period in which the revisions are determined. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined, without regard to the percentage of completion. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable. The current asset “costs and estimated earnings in excess of billings on uncompleted contracts” represents revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract. The liability “billings in excess of costs and estimated earnings on uncompleted contracts” represents billings in excess of revenues recognized. The Company’s projects are typically short in duration, and usually span a period of less than one year. Historically, the Company has not combined or segmented contracts.
Classification of Current Assets and Liabilities	Classification of Current Assets and Liabilities The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. At times, cash held by financial institutions may exceed federally insured limits. The Company has not historically sustained losses on its cash balances in excess of federally insured limits. Cash equivalents at December 31, 2016 and December 31, 2015 consisted primarily of overnight bank deposits.
Risk Concentrations	Risk Concentrations Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of cash and cash equivalents and accounts receivable. The Company depends on its ability to continue to obtain federal, state and local governmental contracts, and indirectly, on the amount of funding available to these agencies for new and current governmental projects. Therefore, a portion of the Company’s operations may be dependent upon the level and timing of government funding. Statutory mechanics liens provide the Company high priority in the event of lien foreclosures following financial difficulties of private owners, thus minimizing credit risk with private customers.
Accounts Receivable	Accounts Receivable Accounts receivable are stated at the historical carrying value, less write-offs and allowances for doubtful accounts. The Company has significant investments in billed and unbilled receivables as of December 31, 2016 and 2015 . Billed receivables represent amounts billed upon the completion of small contracts and progress billings on large contracts in accordance with contract terms and milestone achievements. Unbilled receivables on fixed-price contracts, which are included in costs in excess of billings, arise as revenues are recognized under the percentage-of-completion method. Unbilled amounts on cost-reimbursement contracts represent recoverable costs and accrued profits not yet billed. Revenue associated with these billings is recorded net of any sales tax, if applicable. Past due balances over 90 days and other higher risk amounts are reviewed individually for collectability. In establishing an allowance for doubtful accounts, the Company evaluates its contract receivables and costs in excess of billings and thoroughly reviews historical collection experience, the financial condition of its customers, billing disputes and other factors. The Company writes off uncollectible accounts receivable against the allowance for doubtful accounts if it is determined that the amounts will not be collected or if a settlement is reached for an amount that is less than the carrying value. As of December 31, 2016 and December 31, 2015 , the Company had not recorded an allowance for doubtful accounts. Balances billed to customers but not paid pursuant to retainage provisions in construction contracts generally become payable upon contract completion and acceptance by the owner. Retainage at December 31, 2016 totaled $40.2 million , of which $7.4 million is expected to be collected beyond 2017. Retainage at December 31, 2015 totaled $35.4 million . The Company negotiates change orders and claims with its customers. Unsuccessful negotiations of claims could result in a change to contract revenue that is less than its carrying value, which could result in the recording of a loss. Successful claims negotiations could result in the recovery of previously recorded losses. Significant losses on receivables could adversely affect the Company’s financial position, results of operations and overall liquidity.
Advertising Costs	Advertising Costs The Company primarily obtains contracts through the open bid process, and therefore advertising costs are not a significant component of expense. Advertising costs are expensed as incurred.
Environmental Costs	Environmental Costs Costs related to environmental remediation are charged to expense. Other environmental costs are also charged to expense unless they increase the value of the property and/or provide future economic benefits, in which event the costs are capitalized. Environmental liabilities, if any, are recognized when the expenditure is considered probable and the amount can be reasonably estimated.
Fair Value Measurements	Fair Value Measurements The Company evaluates and presents certain amounts included in the accompanying consolidated financial statements at “fair value” in accordance with U.S. GAAP, which requires the Company to base its estimates on assumptions that market participants, in an orderly transaction, would use to price an asset or liability, and to establish a hierarchy that prioritizes the information used to determine fair value. Refer to Note 8 for more information regarding fair value determination.
Inventory	Inventory Current inventory consists of parts and small equipment held for use in the ordinary course of business and is valued at the lower of cost (using historical average cost) or net realizable value. Where shipping and handling costs are incurred by us, these charges are included in inventory and charged to cost of contract revenue upon use. Non-current inventory consists of spare parts (including engines, cutters and gears) that require special order or longer lead times for manufacture or fabrication, but must be kept on hand to reduce downtime on a project.
Property and Equipment	Property and Equipment Property and equipment are stated at cost less accumulated depreciation, and depreciated using the straight line method over the estimated useful life of the asset. The estimated useful lives of our property and equipment are as follows: Automobiles and trucks 3 to 5 years Buildings and improvements 5 to 30 years Construction equipment 3 to 15 years Vessels and other equipment 1 to 15 years Office equipment 1 to 5 years Ordinary maintenance and repairs that do not improve or extend the useful life of the asset are expensed as incurred. Major renewals and betterments of equipment are capitalized and depreciated generally over three to seven years until the next scheduled maintenance. The Company generally uses accelerated depreciation methods for tax purposes where appropriate. Dry-docking costs are capitalized and amortized on the straight-line method over a period ranging from three to 15 years. Dry-docking costs include, but are not limited to, the inspection, refurbishment and replacement of steel, engine components, tailshafts, mooring equipment and other parts of the vessel. Amortization related to dry-docking costs is included as a component of depreciation. These costs and the related amortization periods are periodically reviewed to determine if the estimates are accurate. If warranted, a significant upgrade of equipment may result in a revision to the useful life of the asset, in which case, the change is accounted for prospectively.
Goodwill	Goodwill Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually at a reporting unit level. The Company's reporting units are the same as its operating segments. Annual impairment tests of goodwill are performed as of October 31 of each year or when circumstances arise that indicate a possible impairment might exist. Tests of impairment require a two-step process to be performed to analyze whether or not goodwill has been impaired. The first step of this test, used to identify potential impairment, compares the estimated fair value of a reporting unit with its carrying amount. The second step, if necessary, quantifies the impairment. The Company assesses the fair value of its reporting units based on a weighted average of valuations based on market multiples, discounted cash flows, and consideration of its market capitalization. The key assumptions used in the discounted cash flow valuations are discount rates, weighted average cost of capital and perpetual growth rates applied to cash flow projections. Also inherent in the discounted cash flow valuation models are past performance, projections and assumptions in current operating plans, and revenue growth rates over the next five years. These assumptions contemplate business, market and overall economic conditions. Other considerations are assumptions that market participants may use and analysis of comparable companies. The underlying assumptions used for determining fair value require significant judgment and are susceptible to change from period to period and could potentially cause a material impact to the income statement. In the future, our estimated fair value could be negatively impacted by extended declines in our stock price, changes in macroeconomic indicators, sustained operating losses, and other factors which may affect our assessment of fair value. See Note 9 to the consolidated financial statements for additional discussion of our goodwill and related goodwill impairment testing.
Intangible Assets	Intangible assets Intangible assets that have finite lives are amortized. In addition, the Company evaluates the remaining useful life of intangible assets in each reporting period to determine whether events and circumstances warrant a revision of the remaining period of amortization. If the estimate of an intangible asset’s remaining life is changed, the remaining carrying value of such asset is amortized prospectively over that revised remaining useful life. Intangible assets that have indefinite lives are not amortized, but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset more likely than not may be impaired. See Note 9 to the consolidated financial statements for additional discussion of our intangible assets and trade name impairment testing.
Stock-Based Compensation	Stock-Based Compensation The Company recognizes compensation expense for equity awards over the vesting period based on the fair value of these awards at the date of grant. The computed fair value of these awards is recognized as a non-cash cost over the period the employee provides services, which is typically the vesting period of the award. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. The fair value of restricted stock grants is equivalent to the fair value of the stock issued on the date of grant, and is measured as the mean price of the stock on the day of grant. Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on historical experience and future expectations and this assessment is updated on a periodic basis.
Income Taxes	Income Taxes The Company determines its consolidated income tax provision using the liability method prescribed by U.S. GAAP, which requires the recognition of income tax expense for the amount of taxes payable or refundable for the current period and for deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current provision for income taxes, its deferred tax assets and liabilities, and any valuation allowance to be recorded against any deferred tax asset. The current provision for income tax is based upon the current tax laws and the Company’s interpretation of these laws, as well as the probable outcomes of any tax audits. The value of any net deferred tax asset depends upon estimates of the amount and category of future taxable income reduced by the amount of any tax benefits that the Company does not expect to realize. Actual operating results and the underlying amount and category of income in future years could render current assumptions, judgments and estimates of recoverable net deferred taxes inaccurate, thus impacting the Company’s financial position and results of operations. The Company computes deferred income taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740-10 which prescribes a recognition threshold and measurement attribute for financial statement disclosure of tax positions taken, or expected to be taken, on its consolidated tax return. The Company evaluates and records any uncertain tax positions based on the amount that management deems is more likely than not to be sustained upon examination and ultimate settlement with the tax authorities in the tax jurisdictions in which it operates.
Insurance Coverage	Insurance Coverage The Company maintains insurance coverage for its business and operations. Insurance related to property, equipment, automobile, general liability, and a portion of workers' compensation is provided through traditional policies, subject to a deductible or deductibles. A portion of the Company's workers’ compensation exposure is covered through a mutual association, which is subject to supplemental calls. The heavy civil marine construction segment maintains five levels of excess loss insurance coverage, totaling $200.0 million in excess of primary coverage. This excess loss coverage responds to most of its liability policies when a primary limit of $1.0 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10.0 million and the Watercraft Pollution Policy primary limit is $5.0 million . The commercial concrete construction segment maintains two levels of excess loss insurance coverage, totaling $200.0 million in excess of primary coverage. This excess loss coverage responds to most of its liability policies when a primary limit of $1.0 million has been exhausted. Separately, the Company’s heavy civil marine construction segment employee health care is provided through a trust administered by a third party. Funding of the trust is based on current claims. The administrator has purchased appropriate stop-loss coverage. Losses on these policies up to the deductible amounts are accrued based upon known claims incurred and an estimate of claims incurred but not reported. The accruals are derived from known facts, historical trends and industry averages to determine the best estimate of the ultimate expected loss. Actual claims may vary from estimates. Any adjustments to such reserves are included in the consolidated results of operations in the period in which they become known. The Company's commercial concrete construction segment employee health care is provided through two policies. A fully funded policy is offered primarily to salaried employees and their dependents while a partially self-funded plan with an appropriate stop-loss is offered primarily to hourly employees and their dependents. The self-funded plan is funded to the maximum exposure and, as a result, expects to receive a partial refund after the policy expiration.
Warranty Costs	Warranty Costs Provision for estimated warranty costs, (if any) is made in the period in which such costs become probable and is periodically adjusted to reflect actual experience. The Company historically has not been subject to significant warranty provisions.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The FASB issues accounting standards updates (each, an "ASU") from time to time to its Accounting Standards Codification ("ASC"), which is the primary source of U.S. GAAP. The Company regularly monitors ASUs as they are issued and considers applicability to its business. All ASUs are adopted by their respective due dates and in the manner prescribed by the FASB. The following are those recently issued ASUs most likely to affect the presentation of the Company's consolidated financial statements: In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment. The FASB issued this update to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. The amendments in this update modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. The guidance should be applied on a prospective basis and is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted and the Company does not anticipate that the changes will materially impact the financial statements unless a goodwill impairment is recognized in the future. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The FASB issued this update to reduce diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company is currently evaluating the impact to its financial statements but does not anticipate the changes to materially impact the financial statements. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The FASB issued this update as part of its Simplification Initiative. The areas for simplification in this update involve several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendment that will cause the most impact to our financial statements will be the change of presenting net operating loss carryforwards for tax purposes as a part of retained earnings as opposed to the current method of having them off balance sheet. The update allows for a modified retrospective approach so that the earliest period presented can be adjusted for the new standard. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those annual periods. The Company is currently evaluating the impact to its financial statements and plans to adopt in the first quarter of 2017. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The Board issued this update to increase the transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The Company anticipates the most significant of the amendments to our organization to be the recognition of assets and liabilities by lessees for those leases classified as operating leases under previous U.S. GAAP. Under the new standard the Company will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those annual periods. In early 2017, the Company established a steering committee to analyze the potential impact of the new standard and explore the possibility of potentially early adopting the new standard. The Company's ability to potentially early adopt will be dependent on the completion of the analysis of information necessary to adopt the standard. In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes. The Board issued this update as part of its initiative to reduce complexity in accounting standards. Current GAAP requires an entity to separate deferred income tax liabilities and assets into current and noncurrent amounts in a classified statement of financial position. The amendments in this update require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those annual periods. The Company does not expect a significant impact to its financial statements other than on working capital calculations. As of December 31, 2016, there was $2.0 million of deferred taxes included in current assets which under this update would be reclassified to long-term. In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory . The Board issued this update as part of its initiative to reduce complexity in accounting standards. The provisions of this guidance are that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The guidance is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company is evaluating the impact to its financial statements but does not anticipate this having a material impact. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers . This comprehensive new revenue recognition standard will supersede existing revenue guidance under U. S. GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the cumulative catch-up transition method). The Company currently anticipates adopting the standard using the cumulative catch-up transition method which will involve recognizing in beginning retained earnings an adjustment for the cumulative effect of the change and providing additional disclosures comparing results to previous years. The Company established a steering committee consisting of representatives from various business segments within the organization. The purpose of this committee is to analyze the impact of the new standard on the Company's business by reviewing the current revenue practices to identify potential differences that would result from applying the requirements of the new standard to revenue contracts. In addition, the Company is analyzing the possibility of any necessary changes to current business processes, systems and controls to support recognition and disclosure under the new standard. The effective date of this guidance was deferred through the issuance of ASU 2015-14 and is effective for the Company beginning January 1, 2018. The impact of adopting the new standard is not expected to materially impact revenue or net income or the consolidated balance sheet. The Company expects the largest impact from the new standard to be on performance obligations within the contracts and the timing of revenue being recognized. The Company continues to evaluate all areas of the standard and its effect on the Company’s financial statements. During the periods presented in these financial statements, the Company implemented other new accounting pronouncements other than those noted above that are discussed in the notes where applicable.

Summary of Significant Accoun31

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Depreciable lives of property and equipment	Automobiles and trucks 3 to 5 years Buildings and improvements 5 to 30 years Construction equipment 3 to 15 years Vessels and other equipment 1 to 15 years Office equipment 1 to 5 years The following is a summary of property and equipment at December 31, 2016 and December 31, 2015 : December 31, December 31, Automobiles and trucks $ 2,525 $ 2,749 Building and improvements 37,269 28,226 Construction equipment 165,023 159,963 Vessels and other equipment 88,659 89,485 Office equipment 7,125 6,057 300,601 286,480 Less: accumulated depreciation (181,293 ) (164,371 ) Net book value of depreciable assets 119,308 122,109 Construction in progress 543 5,649 Land 38,231 38,231 $ 158,082 $ 165,989

Business Acquisition (Tables)

Business Acquisition (Tables)	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Schedule of recognized identified assets acquired and liabilities assumed	The table below outlines the total actual acquisition consideration allocated to the fair values of TAS’s tangible and intangible assets and liabilities as of August 5, 2015 and subsequent working capital adjustments: Accounts receivable $ 54,987 Costs and estimated earnings in excess of billings on uncompleted contracts 4,372 Prepaid expenses and other current assets 828 Fixed assets, net 15,720 Investment in GLM Concrete Services, LLC 76 Goodwill 33,817 Other intangible assets 33,650 Accounts payable (18,458 ) Accrued expenses and other current liabilities (13,015 ) Total Acquisition Consideration at August 5, 2015 $ 111,977 Working Capital Adjustment (1,633 ) Final Adjustment (1) 385 Total Acquisition Consideration $ 110,729
Summary of Pro Forma Results	The following pro forma results give effect to this acquisition, assuming the transaction occurred on January 1 of the respective period. Pro Forma Results For the Years Ended December 31, 2015 December 31, 2014 Contract Revenues $ 602,537 $ 622,063 Operating income from continuing operations $ 1,541 $ 23,062 Net Income $ 1,311 $ 13,399 Basic earnings per share $ 0.05 $ 0.49 Diluted earnings per share $ 0.05 $ 0.48

Concentration of Risk and Ent33

Concentration of Risk and Enterprise Wide Disclosures (Tables)	12 Months Ended
	Dec. 31, 2016
Accounts receivable
Concentration Risk [Line Items]
Schedules of concentration of risk, by risk factor	The table below presents the concentrations of current receivables (trade and retainage) at December 31, 2016 and December 31, 2015 , respectively: December 31, 2016 December 31, 2015 Federal Government $ 5,542 4 % $ 4,230 4 % State Governments 9,302 7 % 1,274 1 % Local Governments 20,886 16 % 19,660 18 % Private Companies 96,673 73 % 82,627 77 % Total receivables $ 132,403 100 % $ 107,791 100 %
Contract revenues
Concentration Risk [Line Items]
Schedules of concentration of risk, by risk factor	dditionally, the table below represents concentrations of revenue by type of customer for the year s ended December 31, 2016 , 2015 and 2014 . Year ended December 31, 2016 % 2015 % 2014 % Federal Government $ 40,361 7 % $ 45,439 10 % $ 47,390 13 % State Governments $ 37,700 7 % $ 42,026 9 % $ 43,147 11 % Local Governments $ 94,461 16 % $ 130,187 28 % $ 97,145 25 % Private Companies $ 405,714 70 % $ 248,846 53 % $ 198,136 51 % Total contract revenues $ 578,236 100 % $ 466,498 100 % $ 385,818 100 %

Contracts in Progress (Tables)

Contracts in Progress (Tables)	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Contracts in progress	Contracts in progress are as follows at December 31, 2016 and December 31, 2015 : December 31, December 31, Costs incurred on uncompleted contracts $ 802,140 $ 782,934 Estimated earnings 143,975 132,694 946,115 915,628 Less: Billings to date (933,828 ) (884,504 ) $ 12,287 $ 31,124 Included in the accompanying consolidated balance sheets under the following captions: Costs and estimated earnings in excess of billings on uncompleted contracts 39,968 $ 59,608 Billings in excess of costs and estimated earnings on uncompleted contracts (27,681 ) (28,484 ) $ 12,287 $ 31,124

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Summary of property and equipment	Automobiles and trucks 3 to 5 years Buildings and improvements 5 to 30 years Construction equipment 3 to 15 years Vessels and other equipment 1 to 15 years Office equipment 1 to 5 years The following is a summary of property and equipment at December 31, 2016 and December 31, 2015 : December 31, December 31, Automobiles and trucks $ 2,525 $ 2,749 Building and improvements 37,269 28,226 Construction equipment 165,023 159,963 Vessels and other equipment 88,659 89,485 Office equipment 7,125 6,057 300,601 286,480 Less: accumulated depreciation (181,293 ) (164,371 ) Net book value of depreciable assets 119,308 122,109 Construction in progress 543 5,649 Land 38,231 38,231 $ 158,082 $ 165,989

Fair Value Schedule of Fair Val

Fair Value Schedule of Fair Value, Assets and Liabilities measured on a recurring basis (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2016 and December 31, 2015 : Fair Value Measurements Carrying Value Level 1 Level 2 Level 3 December 31, 2016 Assets: Cash surrender value of life insurance policy $ 1,188 — 1,188 — Liabilities: Derivatives $ 447 — 447 — December 31, 2015 Assets: Cash surrender value of life insurance policy $ 436 — 436 — Liabilities: Derivatives $ 235 — 235 —

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2016 and December 31, 2015 : Fair Value Measurements Carrying Value Level 1 Level 2 Level 3 December 31, 2016 Assets: Cash surrender value of life insurance policy $ 1,188 — 1,188 — Liabilities: Derivatives $ 447 — 447 — December 31, 2015 Assets: Cash surrender value of life insurance policy $ 436 — 436 — Liabilities: Derivatives $ 235 — 235 —

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in goodwill	The table below summarizes changes in goodwill recorded by the Company during the periods ended December 31, 2016 and December 31, 2015 : December 31, December 31, Beginning balance, January 1 $ 65,982 $ 33,798 Additions 369 32,184 Ending balance $ 66,351 $ 65,982
Schedule of changes and amortization of finite-lived intangible assets	The tables below present the activity and amortizations of finite-lived intangible assets: 2016 2015 Intangible assets, January 1 $ 34,362 $ 7,602 Additions — 26,760 Total intangible assets, end of year 34,362 34,362 Accumulated amortization, January 1 $ (11,933 ) $ (7,515 ) Current year amortization (7,287 ) (4,418 ) Total accumulated amortization (19,220 ) (11,933 ) Net intangible assets, end of year $ 15,142 $ 22,429
Summary of Finite-lived Intangible Assets Amortization Expense	Future expense remaining of approximately $15.1 million will be amortized as follows: 2017 $ 4,554 2018 3,168 2019 2,462 2020 1,955 2021 1,448 Thereafter 1,555 $ 15,142

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Payables and Accruals [Abstract]
Schedule of accrued liabilities	Accrued liabilities at December 31, 2016 and 2015 consisted of the following: 2016 2015 Accrued salaries, wages and benefits $ 10,818 $ 8,115 Accrual for self-insurance liabilities 5,223 7,998 Property taxes 1,615 2,020 Sales tax 1,722 1,991 Interest 19 112 Payable to TAS Seller — 728 Other accrued expenses 549 1,185 $ 19,946 $ 22,149

Long-term Debt and Line of Cr40

Long-term Debt and Line of Credit (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of Debt	The Company's obligations under debt arrangements consisted of the following: December 31, 2016 December 31, 2015 Principal Debt Issuance Costs (1) Total Principal Debt Issuance Costs (1) Total Revolving line of credit $ 8,000 $ (252 ) $ 7,748 $ 4,021 $ (147 ) $ 3,874 Term loan - current 11,813 (373 ) 11,440 8,438 (308 ) 8,130 Total current debt 19,813 (625 ) 19,188 12,459 (455 ) 12,004 Term loan - long-term 84,750 (2,673 ) 82,077 98,188 (3,583 ) 94,605 Total debt $ 104,563 $ (3,298 ) $ 101,265 $ 110,647 $ (4,038 ) $ 106,609 (1) Total debt issuance costs, include underwriter fees, legal fees and syndication fees and fees related to the execution of the First Amendment to the Credit Agreement as previously discussed.
Debt Maturity Schedule	The table below outlines the total remaining payment amounts annually for the term loan through maturity of the Credit Facility: 2017 11,813 2018 13,500 2019 15,188 2020 56,062 $ 96,563

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of components of income tax expense (benefit)	The following table presents the components of our consolidated income tax expense (benefit) for the years ended December 31, 2016 , 2015 and 2014 : Current Deferred Total Year ended December 31, 2016 U.S. Federal $ 35 $ (1,093 ) $ (1,058 ) State and local 511 $ 1,519 $ 2,030 Foreign 284 325 609 $ 830 $ 751 $ 1,581 Year ended December 31, 2015 U.S. Federal $ 3 $ (3,768 ) $ (3,765 ) State and local (60 ) 883 823 Foreign 423 — 423 $ 366 $ (2,885 ) $ (2,519 ) Year ended December 31, 2014 U.S. Federal $ 247 $ 2,571 $ 2,818 State and local 599 (702 ) (103 ) Foreign 460 — 460 $ 1,306 $ 1,869 $ 3,175
Schedule of effective income tax reconciliation	The Company’s income tax provision reconciles to the provision at the statutory U.S. federal income tax rate for each year ended December 31, as follows: 2016 2015 2014 Statutory amount (computed at 35%) $ (714 ) $ (3,703 ) $ 3,519 State income tax, net of federal benefit 94 (709 ) (312 ) Permanent differences 99 43 122 Permanent differences, incentive stock options 224 298 157 True up to prior year taxes 109 — (311 ) Valuation Allowance 1,769 1,552 — Consolidated income tax provision $ 1,581 $ (2,519 ) $ 3,175 Consolidated effective tax rate (77.5 )% 23.8 % 31.6 %
Schedule of deferred tax assets and liabilities	The Company’s deferred tax assets and liabilities are as follows: December 31, 2016 December 31, 2015 Current Long- term Current Long- term Assets related to: Accrued liabilities $ 2,322 $ — $ 3,073 $ — Intangible assets — 4,517 — 2,983 Net operating loss carryforward — 7,455 — 4,597 Valuation allowance — (3,321 ) — (1,552 ) Non-qualified stock options 112 1,367 31 1,354 Foreign tax credits — 2,035 — 1,501 AMT credits — 780 — 995 Other 45 16 44 32 Total assets 2,479 12,849 3,148 9,910 Liabilities related to: Depreciation and amortization — (25,326 ) — (24,309 ) Goodwill — (6,502 ) — (4,933 ) Deferred revenue on maintenance contracts (429 ) — (8 ) — Other (37 ) (21 ) (32 ) (13 ) Total liabilities (466 ) (31,849 ) (40 ) (29,255 ) Net deferred assets (liabilities) $ 2,013 $ (19,000 ) $ 3,108 $ (19,345 )
Schedule of net deferred tax assets and liabilities as reported in the balance sheet	As reported in the balance sheets: December 31, 2016 December 31, 2015 Net current deferred tax assets 2,013 3,108 Net non-current deferred tax liabilities (19,000 ) (19,345 ) Total net deferred tax liabilities: $ (16,987 ) $ (16,237 )

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Schedule of earnings per share, basic and diluted	The following table reconciles the denominators used in the computations of both basic and diluted (loss) earnings per share: Year ended December 31, 2016 2015 2014 Basic: Weighted average shares outstanding 27,536,967 27,366,528 27,421,441 Diluted: Total basic weighted average shares outstanding 27,536,967 27,366,528 27,421,441 Effect of dilutive securities: Common stock options — — 366,172 Total weighted average shares outstanding assuming dilution 27,536,967 27,366,528 27,787,613 Anti-dilutive stock options — — 801,441 Shares of common stock issued from the exercise of stock options 13,850 3,970 143,282

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of restricted stock activity	The following table summarizes the restricted stock activity under the Company's equity incentive plans : Number of Shares Weighted Average Fair Value Per Share Nonvested at January 1, 2014 217,045 $ 6.60 Granted 115,726 $ 11.35 Vested (96,908 ) $ 7.35 Forfeited/repurchased shares — $ — Nonvested at December 31, 2014 235,863 $ 8.63 Granted 38,660 $ 5.82 Vested (134,545 ) $ 6.84 Forfeited/repurchased shares (19,824 ) $ 11.35 Nonvested at December 31, 2015 120,154 $ 9.28 Granted 407,002 $ 4.96 Vested (147,259 ) $ 6.62 Forfeited/repurchased shares (7,591 ) $ 7.08 Nonvested at December 31, 2016 372,306 $ 5.66
Schedule of stock options activity	The following table summarizes the stock option activity under the Company's equity incentive plans: Number of Shares Weighted Average Exercise Price Per Share Weighted Average Contractual Life (Years) Aggregate Intrinsic Value Outstanding at January 1, 2014 2,071,757 $ 9.49 Granted 233,828 $ 11.35 Exercised (143,282 ) $ 6.08 Forfeited (105,405 ) $ 11.06 Outstanding at December 31, 2014 2,056,898 $ 9.86 Granted 143,862 $ 5.82 Exercised (3,970 ) $ 6.00 Forfeited (46,890 ) $ 11.72 Outstanding at December 31, 2015 2,149,900 $ 9.56 Granted 587,862 $ 4.98 Exercised (13,850 ) $ 4.86 Forfeited (374,466 ) $ 9.89 Outstanding at December 31, 2016 2,349,446 $ 8.39 Vested and expected to vest at December 31, 2016 2,308,956 $ 8.32 5.24 $ 6,970 Exercisable at December 31, 2016 1,627,204 $ 9.61 3.67 $ 3,897
Schedule of stock option valuation assumptions	The Company calculates the fair value of each option on the date of grant using the Black-Scholes pricing model and the following weighted-average assumptions in each year: 2016 2015 2014 Weighted average grant-date fair value of options granted $ 4.97 $ 5.82 $ 6.40 Risk-free interest rate 1.06 % 0.97 % 1 % Expected volatility 49 % 38 % 88.5 % Expected term of options (in years) 3.0 3.0 3.0 Dividend yield — % — % — %
Schedule of intrinsic value of options exercised and fair value of shares vested	2016 2015 2014 Total intrinsic value of options exercised $ 53 $ 17 $ 494 Total fair value of shares vested $ 986 $ 1,226 $ 923

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Schedule of multiemployer plans	The following table presents the Company's participation in these plans: Pension Plan Pension Protection Act ("PPA") FIP/RP Expiration Pension Trust Employer Certified Zone Status (1) Status Contributions Surcharge of Collective Fund Identification Number 2016 2015 P/I (2) 2016 2015 2014 Imposed Bargaining Agreement International Union of Operating Engineers - Employers Construction Industry Retirement Plan - Local 302 and 612 Trust Funds 91-6028571 Green Green N/A $ 2,158 $ 1,518 $ 1,295 — 2018 Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights 91-6029051 91-6029049 Green Green N/A $ 938 $ 748 $ 737 — 2018 Alaska Carpenters Trust Fund 92-0120866 Green Green N/A $ 889 $ 807 $ 1,044 — 2017 Alaska Laborers Trust Fund 91-6028298 Yellow Orange P $ 126 $ 110 $ 246 — 2017 1. The most recent PPA zone status available in 2016 and 2015 is for the plan's year end during 2015 and 2014, respectively. Zone status is based on information received from the plan and is indicative of the plans funding status. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the orange zone are less than 80 percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next six years, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded. 2. The FIP/RP Status P/I column indicates plans for which a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending ("P"), or implemented ("I").

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of future minimum rental payments for operating leases	Future minimum lease payments under non-cancelable operating leases as of December 31, 2016 are as follows: Amount Year ended December 31, 2017 $ 7,274 2018 6,194 2019 5,233 2020 4,350 2021 2,746 Thereafter 14,531 $ 40,328

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting	Segment information for the periods presented is provided as follows: Year Ended December 31, 2016 Year Ended December 31, 2015 Heavy Civil Marine Construction Contract revenues $ 284,632 $ 347,117 Operating loss (12,403 ) (14,243 ) Depreciation and amortization expense (21,398 ) (21,075 ) Total Assets $ 279,362 $ 315,869 Property, Plant and Equipment, net 143,425 150,117 Commercial Concrete Construction Contract revenues $ 293,604 $ 119,381 Operating income 16,477 6,244 Depreciation and amortization expense (12,764 ) (7,008 ) Total Assets $ 168,314 $ 145,593 Property, Plant and Equipment, net 14,657 15,872

Selected Quarterly Financial 47

Selected Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of quarterly financial information	The following tables set forth selected unaudited financial information for the eight quarters in the two-year period ended December 31, 2016. This information has been prepared on the same basis as the audited financial statements and, in the opinion of management, contains all adjustments necessary for a fair presentation. First Quarter Second Quarter Third Quarter Fourth Quarter Total Year (in thousands, except per share data) 2016 Revenues $ 129,623 $ 140,301 $ 164,017 $ 144,295 $ 578,236 Gross profit 14,710 16,946 24,169 11,657 67,482 Operating (loss) income (455 ) 281 9,531 (5,283 ) 4,074 (Loss) income before income taxes (1,958 ) (1,310 ) 7,963 (6,734 ) (2,039 ) Net (loss) income (1,208 ) (808 ) 4,739 (6,343 ) (1) (3,620 ) (Loss) earnings per share: Basic $ (0.04 ) $ (0.03 ) $ 0.17 $ (0.23 ) $ (0.13 ) Diluted $ (0.04 ) $ (0.03 ) $ 0.17 $ (0.23 ) $ (0.13 ) First Quarter Second Quarter Third Quarter Fourth Quarter Total Year (in thousands, except per share data) 2015 Revenues $ 81,455 $ 86,091 $ 137,061 $ 161,891 $ 466,498 Gross profit 8,456 6,025 8,278 17,423 40,182 Operating (loss) income (193 ) (2,712 ) (8,325 ) 3,231 (7,999 ) (Loss) income before income taxes (419 ) (2,960 ) (9,065 ) 1,865 (10,579 ) Net (loss) income (258 ) (1,845 ) (7,396 ) 1,439 (8,060 ) (Loss) earnings per share: Basic $ (0.01 ) $ (0.07 ) $ (0.27 ) $ 0.06 $ (0.29 ) Diluted $ (0.01 ) $ (0.07 ) $ (0.27 ) $ 0.06 $ (0.29 ) (1) - Fourth quarter 2016 net loss includes $0.8 million of tax expense that represents an out of period adjustment associated with deferred taxes. Management evaluated the effect of the adjustment on the Company's financial statements based on SEC Staff Accounting Bulleting ("SAB") No. 99 and SAB 108 and concluded that it was immaterial to the current and prior year's financial statements.

Description of Business and B48

Description of Business and Basis of Presentation (Details) - segment	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	1	2	2	2
Number of operating segments		2

Summary of Significant Accoun49

Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounts Receivable [Abstract]
Contract receivable retention	$ 40.2	$ 35.4
Retainage, long-term	$ 7.4

Summary of Significant Accoun50

Summary of Significant Accounting Policies - Advertising (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Advertising Expense [Abstract]
Advertising expense	$ 178	$ 114	$ 13

Summary of Significant Accoun51

Summary of Significant Accounting Policies - Depreciable Lives of Property and Equipment (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense									$ 26,900	$ 23,700	$ 23,500
Net (loss) income									$ (3,620)	$ (8,060)	$ 6,877
Diluted (in dollars per share)	$ (0.23)	$ 0.17	$ (0.03)	$ (0.04)	$ 0.06	$ (0.27)	$ (0.07)	$ (0.01)	$ (0.13)	$ (0.29)	$ 0.25
Equipment improvement | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									3 years
Equipment improvement | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									7 years
Automobiles and trucks | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									3 years
Automobiles and trucks | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									5 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									5 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									30 years
Construction equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									3 years
Construction equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									15 years
Dredges and dredging equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									1 year
Dredges and dredging equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									15 years
Office equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									1 year
Office equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									5 years
Dry-docking capitalized costs | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									3 years
Dry-docking capitalized costs | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life									15 years

Summary of Significant Accoun52

Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	Oct. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill		$ 66,351	$ 65,982	$ 33,798
Revenue growth rate implied in reporting units valuations, number of years projected		5 years
Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill		$ 33,800
Discount rate	25.00%
Percentage of fair value in excess of carrying amt	33.30%
Commercial Concrete Segment
Goodwill [Line Items]
Goodwill		$ 32,600
Discount rate	20.00%
Percentage of fair value in excess of carrying amt	4.20%
Estimate of Fair Value Measurement | Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill impairment, segment value	$ 345,000
Estimate of Fair Value Measurement | Commercial Concrete Segment
Goodwill [Line Items]
Goodwill impairment, segment value	126,000
Reported Value Measurement | Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill impairment, segment value	230,300
Reported Value Measurement | Commercial Concrete Segment
Goodwill [Line Items]
Goodwill impairment, segment value	$ 120,700

Summary of Significant Accoun53

Summary of Significant Accounting Policies - Intangible Assets (Details) $ in Millions	Oct. 31, 2015USD ($)
Trade Names | Estimate of Fair Value Measurement
Finite-Lived Intangible Assets [Line Items]
Intangible assets, value	$ 9.9

Summary of Significant Accoun54

Summary of Significant Accounting Policies - Insurance Coverage (Details)	12 Months Ended
	Dec. 31, 2016USD ($)levelspolicy	Dec. 31, 2015USD ($)
Insurance Coverage [Line Items]
Levels of insurance coverage maintained by the Company | levels	5
Number of Insurance Policies | policy	2
Accrual for self-insurance liabilities	$ 5,223,000	$ 7,998,000
Heavy Civil Marine Construction Segment
Insurance Coverage [Line Items]
Levels of insurance coverage maintained by the Company | levels	5
Amount in excess of primary insurance coverage	$ 200,000,000
Heavy Civil Marine Construction Segment | Other liability policies
Insurance Coverage [Line Items]
Primary limit of insurance coverage	1,000,000
Heavy Civil Marine Construction Segment | Maritime employer's liability
Insurance Coverage [Line Items]
Primary limit of insurance coverage	10,000,000
Heavy Civil Marine Construction Segment | Watercraft pollution policy
Insurance Coverage [Line Items]
Primary limit of insurance coverage	$ 5,000,000
Commercial Concrete Segment
Insurance Coverage [Line Items]
Levels of insurance coverage maintained by the Company | levels	2
Amount in excess of primary insurance coverage	$ 200,000,000
Commercial Concrete Segment | Other liability policies
Insurance Coverage [Line Items]
Primary limit of insurance coverage	$ 1,000,000

Summary of Significant Accoun55

Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue, Major Customer [Line Items]
Contract revenues	$ 144,295	$ 164,017	$ 140,301	$ 129,623	$ 161,891	$ 137,061	$ 86,091	$ 81,455	$ 578,236	$ 466,498	$ 385,818
Customer One
Revenue, Major Customer [Line Items]
Contract revenues			$ 0

Summary of Significant Accoun56

Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Deferred tax asset	$ 2,013	$ 3,108

Business Acquisition - Narrati

Business Acquisition - Narrative (Details) - USD ($) $ in Thousands	Aug. 05, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Federal statutory tax rate		35.00%	35.00%	35.00%
GLM Concrete Solutions, LLC
Business Acquisition [Line Items]
Issued and outstanding membership interest acquired	49.00%
TAS Commercial Concrete
Business Acquisition [Line Items]
Payments to acquire businesses	$ 112,000
Goodwill, net of working capital adjustment	32,600
Goodwill expected to be tax deductible	$ 32,600
Goodwill, tax basis, amortization period	15 years
Acquisition related costs	$ 400
Minimum | TAS Commercial Concrete
Business Acquisition [Line Items]
Property and equipment useful life	3 years
Maximum | TAS Commercial Concrete
Business Acquisition [Line Items]
Property and equipment useful life	15 years

Business Acquisition - Recogni

Business Acquisition - Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 17, 2016	Dec. 31, 2015	Dec. 31, 2016	Aug. 05, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill		$ 65,982	$ 66,351		$ 33,798
TAS Commercial Concrete
Business Acquisition [Line Items]
Accounts receivable				$ 54,987
Costs and estimated earnings in excess of billings on uncompleted contracts				4,372
Prepaid expenses and other current assets				828
Fixed assets, net				15,720
Investment in GLM Concrete Services, LLC				76
Goodwill				33,817
Other intangible assets				33,650
Accounts payable				(18,458)
Accrued expenses and other current liabilities				(13,015)
Total Acquisition Consideration at August 5, 2015			110,729	111,977
Working Capital Adjustment	$ 385	$ (1,633)
Total Acquisition Consideration, Final			$ 110,729	$ 111,977

Business Acquisition - Pro Form

Business Acquisition - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition, Pro Forma Information [Abstract]
Contract Revenues	$ 602,537	$ 622,063
Operating income from continuing operations	1,541	23,062
Net Income	$ 1,311	$ 13,399
Basic earnings per share (USD per share)	$ 50	$ 0.49
Diluted earnings per share (USD per share)	$ 50	$ 0.48

Concentration of Risk and Ent60

Concentration of Risk and Enterprise Wide Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Concentration Risk [Line Items]
Contract revenues	$ 144,295	$ 164,017	$ 140,301	$ 129,623	$ 161,891	$ 137,061	$ 86,091	$ 81,455	$ 578,236	$ 466,498	$ 385,818
Foreign
Concentration Risk [Line Items]
Contract revenues, percent									1.30%	4.10%	12.90%
Customer concentration risk | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	132,403				107,791				$ 132,403	$ 107,791
Concentration risk, percentage									100.00%	100.00%
Customer concentration risk | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage									100.00%	100.00%	100.00%
Contract revenues									$ 578,236	$ 466,498	$ 385,818
Customer concentration risk | Federal Government | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	5,542				4,230				$ 5,542	$ 4,230
Concentration risk, percentage									4.00%	4.00%
Customer concentration risk | Federal Government | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage									7.00%	10.00%	13.00%
Contract revenues									$ 40,361	$ 45,439	$ 47,390
Customer concentration risk | State Governments | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	9,302				1,274				$ 9,302	$ 1,274
Concentration risk, percentage									7.00%	1.00%
Customer concentration risk | State Governments | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage									7.00%	9.00%	11.00%
Contract revenues									$ 37,700	$ 42,026	$ 43,147
Customer concentration risk | Local Governments | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	20,886				19,660				$ 20,886	$ 19,660
Concentration risk, percentage									16.00%	18.00%
Customer concentration risk | Local Governments | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage									16.00%	28.00%	25.00%
Contract revenues									$ 94,461	$ 130,187	$ 97,145
Customer concentration risk | Private Companies | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 96,673				$ 82,627				$ 96,673	$ 82,627
Concentration risk, percentage									73.00%	77.00%
Customer concentration risk | Private Companies | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage									70.00%	53.00%	51.00%
Contract revenues									$ 405,714	$ 248,846	$ 198,136

Contracts in Progress (Details)

Contracts in Progress (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Contractors [Abstract]
Costs incurred on uncompleted contracts	$ 802,140	$ 782,934
Estimated earnings	143,975	132,694
Costs incurred and estimated earnings on uncompleted contracts	946,115	915,628
Less: Billings to date	(933,828)	(884,504)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	12,287	31,124
Costs and estimated earnings in excess of billings on uncompleted contracts	39,968	59,608
Billings in excess of costs and estimated earnings on uncompleted contracts	(27,681)	$ (28,484)
Costs and estimated earnings in excess of billings on completed contracts	$ 600

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 300,601	$ 286,480
Less: accumulated depreciation	(181,293)	(164,371)
Property, Pant and Equipment, Net Book Value of Depreciable Assets	119,308	122,109
Property and equipment, net	158,082	165,989
Automobiles and trucks
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,525	2,749
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,269	28,226
Construction equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	165,023	159,963
Dredges and dredging equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	88,659	89,485
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,125	6,057
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	543	5,649
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 38,231	$ 38,231

Property and Equipment Narrativ

Property and Equipment Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long Lived Assets Held-for-sale [Line Items]
Depreciation expense	$ 26.9	$ 23.7	$ 23.5
Impairment of Long-Lived Assets Held-for-use	6.4
Other Nonoperating Income (Expense)
Long Lived Assets Held-for-sale [Line Items]
Impairment of Long-Lived Assets Held-for-use	0.9
Other Nonoperating Income (Expense) | Heavy Civil Marine Construction Segment
Long Lived Assets Held-for-sale [Line Items]
Impairment of Long-Lived Assets to be Disposed of	$ 1.7

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventory	$ 5,392	$ 4,867
Inventory, non-current	$ 3,998	$ 6,218

Fair Value - Narrative (Detail

Fair Value - Narrative (Details) $ in Thousands	Dec. 31, 2016USD ($)employee	Dec. 31, 2015USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life Insurance, number of employees | employee	4
Life Insurance, face amount	$ 11,100
Assets | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	1,188	$ 436
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	0	0
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	1,188	436
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	0	0
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, Fair Value, Net	0	0
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, Fair Value, Net	447	235
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, Fair Value, Net	0	0
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 104,600	$ 110,600

Goodwill and Intangible Asset66

Goodwill and Intangible Assets - Goodwill Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning balance, January 1	$ 65,982	$ 33,798
Additions	369	32,184
Ending balance	$ 66,351	$ 65,982

Goodwill and Intangible Asset67

Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 34,362	$ 7,602
Additions	0	26,760
Total intangible assets, end of year	34,362	34,362
Accumulated Amortization [Roll Forward]
Accumulated amortization, January 1	(11,933)	(7,515)
Current year amortization	(7,287)	(4,418)
Total accumulated amortization	(19,220)	(11,933)
Net intangible assets, end of year	$ 15,142	$ 22,429

Goodwill and Intangible Asset68

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	Aug. 05, 2015	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 7,287	$ 4,418
TAS Commercial Concrete
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 7,300
TAS Commercial Concrete | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired	$ 18,100
Acquired finite-lived intangible assets, useful life	8 years
TAS Commercial Concrete | Contractual backlog
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles acquired	$ 8,700
Acquired finite-lived intangible assets, useful life	2 years
Reported Value Measurement [Member] | TAS Commercial Concrete | Trade Names
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Fair Value Disclosure	$ 6,900

Goodwill and Intangible Asset69

Goodwill and Intangible Assets - Future Amortization Expense of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 4,554
2,017	3,168
2,018	2,462
2,019	1,955
2,020	1,448
Thereafter	1,555
Net intangible assets, end of year	$ 15,142	$ 22,429

Goodwill and Intangible Asset70

Goodwill and Intangible Assets Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Oct. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill	$ 66,351		$ 65,982	$ 33,798
Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill	33,800
Commercial Concrete Segment
Goodwill [Line Items]
Goodwill	$ 32,600
Estimate of Fair Value Measurement | Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill impairment, segment value		$ 345,000
Estimate of Fair Value Measurement | Commercial Concrete Segment
Goodwill [Line Items]
Goodwill impairment, segment value		126,000
Reported Value Measurement | Heavy Civil Marine Construction Segment
Goodwill [Line Items]
Goodwill impairment, segment value		230,300
Reported Value Measurement | Commercial Concrete Segment
Goodwill [Line Items]
Goodwill impairment, segment value		$ 120,700

Goodwill and Intangible Asset71

Goodwill and Intangible Assets Intangible Assets (Details)	Oct. 31, 2016Rate
Heavy Civil Marine Construction Segment
Finite-Lived Intangible Assets [Line Items]
Discount rate	25.00%
Percentage off fair value in excess of carry amt	33.30%
Commercial Concrete Segment
Finite-Lived Intangible Assets [Line Items]
Discount rate	20.00%
Percentage off fair value in excess of carry amt	4.20%

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 10,818	$ 8,115
Accrual for self-insurance liabilities	5,223	7,998
Property taxes	1,615	2,020
Sales tax	1,722	1,991
Interest	19	112
Payable to TAS Seller	0	728
Other accrued expenses	549	1,185
Total accrued liabilities	$ 19,946	$ 22,149

Long-term Debt and Line of Cr73

Long-term Debt and Line of Credit Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Aug. 05, 2015
Debt Instrument [Line Items]
Principal current	$ 19,813,000	$ 12,459,000
Principal	104,563,000	110,647,000
Deferred Finance Costs, current	(625,000)	(455,000)
Deferred Issuance Costs	(3,298,000)	(4,038,000)
Net Value, current	19,188,000	12,004,000
Long-term Debt, Excluding Current Maturities	82,077,000	94,605,000
Total debt	101,265,000	106,609,000
Hedging Liabilities, Noncurrent	382,000	145,000
Debt issuance cost	4,500,000
Debt issuance expense	$ 500,000
Line of Credit
Debt Instrument [Line Items]
Stated interest rate			4.75%
Debt, weighted average interest rate	3.35%
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Principal current	$ 8,000,000	4,021,000
Deferred Finance Costs, current	(252,000)	(147,000)
Net Value, current	$ 7,748,000	3,874,000
Line of credit facility, maximum borrowing capacity			$ 50,000,000
Stated interest rate	3.13%
Term Loan | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 96,563,000
Line of credit facility, maximum borrowing capacity	135,000,000		$ 135,000,000
Term loan-current | Loans Payable
Debt Instrument [Line Items]
Principal current	11,813,000	8,438,000
Deferred Finance Costs, current	(373,000)	(308,000)
Net Value, current	11,440,000	8,130,000
Term loan-long-term | Loans Payable
Debt Instrument [Line Items]
Principal, long-term	84,750,000	98,188,000
Deferred Issuance Costs, long-term	(2,673,000)	(3,583,000)
Long-term Debt, Excluding Current Maturities	82,077,000	94,605,000
Long-term Debt | Accounting Standards Update 2015-03
Debt Instrument [Line Items]
Deferred Issuance Costs	(2,700,000)	(3,600,000)
Short-term Debt | Accounting Standards Update 2015-03
Debt Instrument [Line Items]
Deferred Issuance Costs	$ (600,000)	$ (500,000)

Long-term Debt and Line of Cr74

Long-term Debt and Line of Credit - Provisions of the Revolving Line of Credit and Accordion (Details) - USD ($)	2 Months Ended	3 Months Ended	12 Months Ended
	Mar. 11, 2016	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 05, 2015
Debt Instrument [Line Items]
Repayments of debt			$ 63,084,000	$ 42,955,000	$ 1,557,000
Proceeds from lines of credit			57,000,000	$ 149,021,000	$ 30,000,000
Line of Credit
Debt Instrument [Line Items]
Stated interest rate						4.75%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding		$ 8,000,000	8,000,000
Remaining borrowing capacity		40,700,000	$ 40,700,000
Repayments of debt		$ 53,000,000
Proceeds from lines of credit	$ 10,000,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 50,000,000
Minimum additional borrowing amount						1,000,000
Amount over minimum additional borrowing amount, integral multiples						250,000
Stated interest rate		3.13%	3.13%
Revolving Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						20,000,000
Letters of credit outstanding		$ 1,300,000	$ 1,300,000
Revolving Credit Facility | Bridge Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						5,000,000
Minimum additional borrowing amount						250,000
Amount over minimum additional borrowing amount, integral multiples						$ 50,000

Long-term Debt and Line of Cr75

Long-term Debt and Line of Credit - Provisions of the Term Loan (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 05, 2015
Debt Instrument [Line Items]
Quarterly principal payments		$ 8,400,000
Repayments of Debt		63,084,000	$ 42,955,000	$ 1,557,000
Current portion of debt	$ 11,800,000	11,800,000
Non-current portion of debt	84,800,000	84,800,000
Term Loan | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	96,600,000	96,600,000
Repayments of Debt		1,600,000
Line of credit facility, maximum borrowing capacity	135,000,000	135,000,000			$ 135,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	8,000,000	$ 8,000,000
Repayments of Debt	$ 53,000,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 50,000,000
LIBOR | Term Loan | Line of Credit
Debt Instrument [Line Items]
Effective interest rate	3.125%	3.125%

Long-term Debt and Line of Cr76

Long-term Debt and Line of Credit - Debt Maturity Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt	$ 101,265	$ 106,609
Term Loan | Line of Credit
Debt Instrument [Line Items]
2,017	11,813
2,018	13,500
2,019	15,188
2,020	56,062
Total debt	$ 96,563

Long-term Debt and Line of Cr77

Long-term Debt and Line of Credit - Financial Covenants (Details)	3 Months Ended				5 Months Ended	6 Months Ended	40 Months Ended
	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Aug. 05, 2020	Aug. 05, 2015
Debt Instrument [Line Items]
Debt instrument, covenant, fixed charge coverage ratio, maximum								1.25
Debt instrument, covenant, leverage ratio, maximum				3	3.25
Scenario, Forecast
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum	3.75	4	2.75			2.50	3.25

Long-term Debt and Line of Cr78

Long-term Debt and Line of Credit - Debt Extinguishment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Extinguishment of debt	$ 0	$ 32,427	$ 0

Long-term Debt and Line of Cr79

Long-term Debt and Line of Credit - Derivative Financial Instruments (Details) $ in Thousands	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 16, 2015USD ($)contract
Debt Instrument [Line Items]
Percent of aggregate principal amount hedged			50.00%
Interest rate swap liability	$ 382	$ 145
Swap
Debt Instrument [Line Items]
Derivative, notional amount			$ 67,500
Derivative, number of instruments held (contract) | contract			5

Purchase of Common Shares (Deta

Purchase of Common Shares (Details) - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2014	Jun. 30, 2015
Stock Repurchase Program [Abstract]
Stock repurchase program, authorized amount	$ 40,000,000
Stock repurchase program, expected duration	5 years
Stock repurchased during period, shares		350,000
Stock repurchased during period, average (USD per share)		$ 8.83

Income Taxes - Narrative (Deta

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Federal statutory tax rate	35.00%	35.00%	35.00%
Valuation allowance	$ 3,321	$ 1,552	$ 0
Alternative minimum tax credits, non-expiring	800
Excess tax benefit from stock option exercise	2,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	4,200
Federal Tax Authority
Operating Loss Carryforwards [Line Items]
Alternative minimum tax credits, non-expiring	$ 11,200

Income Taxes - Components of I

Income Taxes - Components of Income Tax Expense (Benefit) by Jurisdiction and by Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Federal
Current	$ 35	$ 3	$ 247
Deferred	(1,093)	(3,768)	2,571
Total	(1,058)	(3,765)	2,818
State and local
Current	511	(60)	599
Deferred	1,519	883	(702)
Total	2,030	823	(103)
Foreign
Current	284	423	460
Deferred	325	0	0
Total	609	423	460
Total Income Taxes
Current	830	366	1,306
Deferred	751	(2,885)	1,869
Total	$ 1,581	$ (2,519)	$ 3,175

Income Taxes - Effective Incom

Income Taxes - Effective Income Tax Expense (Benefit) Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory amount (computed at 35%)	$ (714)	$ (3,703)	$ 3,519
State income tax, net of federal benefit	94	(709)	(312)
Permanent differences	99	43	122
Permanent differences, incentive stock options	224	298	157
True up to prior year taxes	109	0	(311)
Valuation allowance, current	1,769
Valuation allowance	3,321	1,552	0
Total	$ 1,581	$ (2,519)	$ 3,175
Consolidated effective tax rate	(77.50%)	23.80%	31.60%

Income Taxes - Components of D

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Accrued liabilities	$ 2,322	$ 3,073
Intangible assets	0	0
Non-qualified stock options	112	31
Other	45	44
Total assets	2,479	3,148
Long- term
Intangible assets	4,517	2,983
Net operating loss carryforward	7,455	4,597
Valuation allowance	(3,321)	(1,552)	$ 0
Non-qualified stock options	1,367	1,354
Foreign tax credits	2,035	1,501
AMT credits	780	995
Other	16	32
Total assets	12,849	9,910
Current
Deferred revenue on maintenance contracts	(429)	(8)
Other	(37)	(32)
Total liabilities	(466)	(40)
Net current deferred tax assets	2,013	3,108
Long- term
Depreciation and amortization	(25,326)	(24,309)
Goodwill	(6,502)	(4,933)
Deferred revenue on maintenance contracts	0	0
Other	(21)	(13)
Total liabilities	(31,849)	(29,255)
Net non-current deferred tax liabilities	$ (19,000)	$ (19,345)

Income Taxes - Summary of Defe

Income Taxes - Summary of Deferred Tax Asset and Liabilities, as Reported in the Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Summary of Deferred Tax Assets and Liabilities, as Reported in the Balance Sheet [Abstract]
Net current deferred tax assets	$ 2,013	$ 3,108
Net non-current deferred tax liabilities	(19,000)	(19,345)
Total net deferred tax liabilities:	$ (16,987)	$ (16,237)

Earnings (Loss) Per Share - Ba

Earnings (Loss) Per Share - Basic and Diluted (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic:
Weighted average shares outstanding	27,536,967	27,366,528	27,421,441
Effect of dilutive securities:
Common stock options	0	0	366,172
Total weighted average shares outstanding assuming dilution	27,536,967	27,366,528	27,787,613
Shares of common stock issued from the exercise of stock options	13,850	3,970	143,282

Earnings (Loss) Per Share - An

Earnings (Loss) Per Share - Antidilutive Securities (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential antidilutive securities excluded from future computations (in shares)	2,381,926	2,043,375	1,994,818
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options	0	0	801,441

Stock-Based Compensation - Nar

Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended					12 Months Ended
	May 31, 2016	Sep. 30, 2015	Nov. 30, 2014	Nov. 30, 2013	May 31, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved and authorized maximum number of shares to be issued					3,000,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price						$ 4.98	$ 5.82	$ 11.35
Compensation expense related to stock based awards outstanding						$ 2,300	$ 2,300	$ 1,600
Granted (in shares)						587,862	143,862	233,828
Proceeds received upon exercise of stock options						$ 67	$ 28	$ 869
Exercise of stock options, shares						13,850	3,970	143,282
Total share-based compensation cost not yet recognized						$ 2,700
Share-based compensation cost not yet recognized, period for recognition						2 years
Total intrinsic value of options exercised						$ 53	$ 17	$ 494
Total fair value of shares vested						$ 986	$ 1,226	$ 923
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, expiration period					10 years
Forfeiture rate applied to options						5.50%
Stock options | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants awarded during period			14,170	6,167
Weighted average grant-date fair value of options granted				$ 11.35
Stock options | Officers and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period			3 years				3 years
Grants awarded during period			84,891
Weighted average grant-date fair value of options granted			$ 11.35			$ 4.96
Granted (in shares)						267,175	233,828
Stock options | Directors, Officers and Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants awarded during period						0
Stock options | Chief Operating Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants awarded during period		38,660
Weighted average grant-date fair value of options granted		$ 5.82
Granted (in shares)		143,862
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period					3 years
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period					5 years
Performance Shares | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance awards granted in period	68,977
Weighted average grant-date fair value of options granted	$ 4.94
2011 LTIP | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture rate applied to options						3.20%

Stock-Based Compensation - Res

Stock-Based Compensation - Restricted Stock Activity (Details) - Restricted stock - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Beginning nonvested shares (in shares)	120,154	235,863	217,045
Granted (in shares)	407,002	38,660	115,726
Vested (in shares)	(147,259)	(134,545)	(96,908)
Forfeited/repurchased shares (in shares)	(7,591)	(19,824)	0
Ending nonvested shares (in shares)	372,306	120,154	235,863
Weighted Average Fair Value Per Share
Beginning nonvested shares (in dollars per share)	$ 9.28	$ 8.63	$ 6.60
Granted (in dollars per share)	4.96	5.82	11.35
Vested (in dollars per share)	6.62	6.84	7.35
Forfeited/repurchased shares (in dollars per share)	7.08	11.35	0
Ending nonvested shares (in dollars per share)	$ 5.66	$ 9.28	$ 8.63

Stock-Based Compensation - Sto

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Beginning stock options outstanding (in shares)	2,149,900	2,056,898	2,071,757
Granted (in shares)	587,862	143,862	233,828
Exercised (in shares)	(13,850)	(3,970)	(143,282)
Forfeited (in shares)	(374,466)	(46,890)	(105,405)
Ending stock options outstanding (in shares)	2,349,446	2,149,900	2,056,898
Weighted Average Exercise Price Per Share
Beginning stock options outstanding (in dollars per share)	$ 9.56	$ 9.86	$ 9.49
Granted (in dollars per share)	4.98	5.82	11.35
Exercised (in dollars per share)	4.86	6	6.08
Forfeited (in dollars per share)	9.89	11.72	11.06
Ending stock options outstanding (in dollars per share)	$ 8.39	$ 9.56	$ 9.86
Vested and expected to vest at December 31, 2016
Number of Shares	2,308,956
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.32
Weighted Average Contractual Life	5 years 2 months 27 days
Aggregate Intrinsic Value	$ 6,970
December 31, 2016
Number of Shares	1,627,204
Weighted Average Exercise Price Per Share (in dollars per share)	$ 9.61
Weighted Average Contractual Life	3 years 8 months 1 day
Aggregate Intrinsic Value	$ 3,897

Stock-Based Compensation - S91

Stock-Based Compensation - Stock Option Valuation Assumptions (Details) - Stock Option - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Weighted average grant-date fair value of options granted	$ 4.97	$ 5.82	$ 6.40
Risk-free interest rate	1.06%	0.97%	1.00%
Expected volatility	49.00%	38.00%	88.50%
Expected term of options	3 years	3 years	3 years
Dividend yield	0.00%	0.00%	0.00%

Employee Benefits - Narrative

Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
401 (k) Retirement Plan [Abstract]
Minimum service period for plan eligibility	6 months
Minimum allowable contribution to the plan by each employee, percent	1.00%
Maximum allowable contribution to the plan by each employee, percent	80.00%
Employers matching contribution, vesting period	4 years
Company contributions to the plan	$ 1.4	$ 1.4	$ 1.2
Range 1
401 (k) Retirement Plan [Abstract]
Employer matching contribution, percent	100.00%
Employer matching contribution, percent of employees' gross pay	2.00%
Range 2
401 (k) Retirement Plan [Abstract]
Employer matching contribution, percent	50.00%
Employer matching contribution, percent of employees' gross pay	2.00%
AGC Southwest Chapters 401(k) Retirement Plan
401 (k) Retirement Plan [Abstract]
Employer matching contribution, percent	50.00%
Employer matching contribution, percent of employees' gross pay	6.00%
Employer discretionary contribution amount	$ 0.2	$ 0.1

Employee Benefits - Multiemplo

Employee Benefits - Multiemployer Plans (Details) - Multiemployer Plans, Pension - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
International Union of Operating Engineers - Employers Construction Industry Retirement Plan - Local 302 and 612 Trust Funds
Multiemployer Plans [Line Items]
Certified Zone Status	[1]	Green	Green
Contributions		$ 2,158	$ 1,518	$ 1,295
Expiration of Collective Bargaining Agreement		Dec. 31, 2018
Associated General Contractors of Washington Carpenter, Piledrivers, and Millwrights
Multiemployer Plans [Line Items]
Certified Zone Status	[1]	Green	Green
Contributions		$ 938	$ 748	737
Expiration of Collective Bargaining Agreement		Dec. 31, 2018
Alaska Carpenters Trust Fund
Multiemployer Plans [Line Items]
Certified Zone Status	[1]	Green	Green
Contributions		$ 889	$ 807	1,044
Expiration of Collective Bargaining Agreement		Jun. 30, 2017
Alaska Laborers Trust Fund
Multiemployer Plans [Line Items]
Certified Zone Status	[1]	Yellow	Orange
Contributions		$ 126	$ 110	$ 246
Expiration of Collective Bargaining Agreement		Dec. 31, 2017
[1]	The most recent PPA zone status available in 2016 and 2015 is for the plan's year end during 2015 and 2014, respectively. Zone status is based on information received from the plan and is indicative of the plans funding status. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the orange zone are less than 80 percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next six years, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.

Commitments and Contingencies

Commitments and Contingencies - Narrative (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2005USD ($)extension	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Sale Leaseback Transaction [Abstract]
Rent expense			$ 85	$ 173
Operating Leases, Rent Expense, Net [Abstract]
Operating leases, rent expense		$ 1,000
Office building
Operating Leases, Rent Expense, Net [Abstract]
Lease term of assets subject to operating leases		9 years
Vehicles
Operating Leases, Rent Expense, Net [Abstract]
Operating leases, rent expense		$ 1,500	$ 2,300	2,900
Other facilities | Minimum
Operating Leases, Rent Expense, Net [Abstract]
Lease term of assets subject to operating leases		1 year
Other facilities | Maximum
Operating Leases, Rent Expense, Net [Abstract]
Lease term of assets subject to operating leases		5 years
Office building
Sale Leaseback Transaction [Abstract]
Proceeds from the sale-leaseback transaction	$ 2,100
Sale-leaseback term	10 years
Deferred gain on sale-leaseback transaction	$ 562
Gain recognized on sale-lease back transaction		$ 8		$ 56
Options to extend term of the lease for additional five years | extension	2
Maximum extension term of each option to extend	5 years

Commitments and Contingencies95

Commitments and Contingencies - Operating Leases Future Minimum Payments (Details) $ in Thousands	Dec. 31, 2016USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,016	$ 7,274
2,017	6,194
2,018	5,233
2,019	4,350
2,020	2,746
Thereafter	14,531
Total	$ 40,328

Segment Information (Details)

Segment Information (Details)	3 Months Ended								6 Months Ended		12 Months Ended
	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Jun. 30, 2016segment	Dec. 31, 2015segment	Dec. 31, 2016USD ($)segment	Dec. 31, 2015USD ($)segment	Dec. 31, 2014USD ($)
Segment Reporting Information [Line Items]
Contract revenues	$ 144,295,000	$ 164,017,000	$ 140,301,000	$ 129,623,000	$ 161,891,000	$ 137,061,000	$ 86,091,000	$ 81,455,000			$ 578,236,000	$ 466,498,000	$ 385,818,000
Number of reportable segments | segment									1	2	2	2
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues											$ 0	$ 0
Heavy Civil Marine Construction Segment | Mexico and the Caribbean
Segment Reporting Information [Line Items]
Contract revenues											$ 7,400,000	$ 18,900,000

Segment Information - Summary (

Segment Information - Summary (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Contract revenues	$ 144,295	$ 164,017	$ 140,301	$ 129,623	$ 161,891	$ 137,061	$ 86,091	$ 81,455	$ 578,236	$ 466,498	$ 385,818
Operating income (loss)	(5,283)	$ 9,531	$ 281	$ (455)	3,231	$ (8,325)	$ (2,712)	$ (193)	4,074	(7,999)	10,262
Depreciation and amortization									(34,162)	(28,083)	$ (23,451)
Assets	447,676				461,462				447,676	461,462
Property and equipment, net	158,082				165,989				158,082	165,989
Operating Segments | Heavy Civil Marine Construction Segment
Segment Reporting Information [Line Items]
Contract revenues									284,632	347,117
Operating income (loss)									(12,403)	(14,243)
Depreciation and amortization									(21,398)	(21,075)
Assets	279,362				315,869				279,362	315,869
Property and equipment, net	143,425				150,117				143,425	150,117
Operating Segments | Commercial Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues									293,604	119,381
Operating income (loss)									16,477	6,244
Depreciation and amortization									(12,764)	(7,008)
Assets	168,314				145,593				168,314	145,593
Property and equipment, net	$ 14,657				$ 15,872				$ 14,657	$ 15,872

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	Aug. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Aug. 05, 2015
Related Party Transaction [Line Items]
Operating leases, rent expense		$ 1,000,000
Payroll expense related to subcontracted employees		700,000	$ 700,000
Management services to TAS		500,000	700,000
GLM Concrete Solutions, LLC
Related Party Transaction [Line Items]
Issued and outstanding membership interest acquired				49.00%
Affiliated Entity | Lease Arrangement
Related Party Transaction [Line Items]
Operating leases, annual lease amount		$ 820,000
Operating leases, rent expense			$ 312,500
Affiliated Entity | Acquisition of Houston Industrial Tool Services, Inc. | Houston Industrial Tool Services, Inc.
Related Party Transaction [Line Items]
Payments to acquire businesses	$ 400,000

Selected Quarterly Financial 99

Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax expense									$ 1,581	$ (2,519)	$ 3,175
Selected Quarterly Financial Information [Abstract]
Revenues	$ 144,295	$ 164,017	$ 140,301	$ 129,623	$ 161,891	$ 137,061	$ 86,091	$ 81,455	578,236	466,498	385,818
Gross profit	11,657	24,169	16,946	14,710	17,423	8,278	6,025	8,456	67,482	40,182	44,594
Operating (loss) income	(5,283)	9,531	281	(455)	3,231	(8,325)	(2,712)	(193)	4,074	(7,999)	10,262
(Loss) income before income taxes	(6,734)	7,963	(1,310)	(1,958)	1,865	(9,065)	(2,960)	(419)	(2,039)	(10,579)	$ 10,052
Net (loss) income	$ (6,343)	$ 4,739	$ (808)	$ (1,208)	$ 1,439	$ (7,396)	$ (1,845)	$ (258)	$ (3,620)	$ (8,060)
Earnings Per Share, Basic and Diluted [Abstract]
Basic (USD per share)	$ (0.23)	$ 0.17	$ (0.03)	$ (0.04)	$ 0.06	$ (0.27)	$ (0.07)	$ (0.01)	$ (0.13)	$ (0.29)	$ 0.25
Diluted income (loss) per share (USD per share)	$ (0.23)	$ 0.17	$ (0.03)	$ (0.04)	$ 0.06	$ (0.27)	$ (0.07)	$ (0.01)	$ (0.13)	$ (0.29)	$ 0.25
Restatement Adjustment
Income tax expense	$ 800

Schedule II - Valuation and 100

Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Activity in Provision for Doubtful Accounts
Balance at the Beginning of the Period	$ 0	$ 0	$ 0
Charged to Revenue, Cost or Expense	0	22	993
Deduction	0	(22)	(993)
Balance at the End of the Period	$ 0	$ 0	$ 0