Orion (ORN) 10-Q30 Oct 202020 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2020	Oct. 29, 2020
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2020
Entity File Number	1-33891
Entity Registrant Name	ORION GROUP HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0097459
Entity Address, Address Line One	12000 Aerospace Avenue, Suite 300
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77034
City Area Code	713
Local Phone Number	852-6500
Title of 12(b) Security	Common stock, $0.01 par value per share
Trading Symbol	ORN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,415,095
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001402829
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,732	$ 128
Restricted cash	0	958
Accounts receivable:
Trade, net of allowance for credit losses of $411 and $2,600, respectively	90,612	116,540
Retainage	36,230	42,547
Income taxes receivable	962	962
Other current	25,931	2,680
Inventory	1,936	1,114
Costs and estimated earnings in excess of billings on uncompleted contracts	43,196	41,389
Prepaid expenses and other	4,593	5,647
Total current assets	206,192	211,965
Property and equipment, net of depreciation	125,911	132,348
Operating lease right-of-use assets, net of amortization	15,619	17,997
Financing lease right-of-use assets, net of amortization	12,775	7,896
Inventory, non-current	6,506	7,037
Intangible assets, net of amortization	10,595	12,147
Deferred income tax asset	67	85
Other non-current	4,855	5,369
Total assets	382,520	394,844
Current liabilities:
Current debt, net of debt issuance costs	4,347	3,668
Accounts payable:
Trade	47,810	70,421
Retainage	590	562
Accrued liabilities	45,925	16,966
Income taxes payable	486	1,523
Billings in excess of costs and estimated earnings on uncompleted contracts	40,967	48,781
Current portion of operating lease liabilities	4,766	5,043
Current portion of financing lease liabilities	4,543	2,788
Total current liabilities	149,434	149,752
Long-term debt, net of debt issuance costs	36,285	68,029
Operating lease liabilities	11,545	13,596
Financing lease liabilities	7,670	3,760
Other long-term liabilities	20,053	20,436
Deferred income tax liability	214	205
Interest rate swap liability	1,795	1,045
Total liabilities	226,996	256,823
Stockholders? equity:
Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued
Common stock -- $0.01 par value, 50,000,000 authorized, 31,126,326 and 30,303,395 issued; 30,415,095 and 29,592,164 outstanding at September 30, 2020 and December 31, 2019, respectively	311	303
Treasury stock, 711,231 shares, at cost, as of September 30, 2020 and December 31, 2019, respectively	(6,540)	(6,540)
Accumulated other comprehensive loss	(1,795)	(1,045)
Additional paid-in capital	184,214	182,523
Retained loss	(20,666)	(37,220)
Total stockholders' equity	155,524	138,021
Total liabilities and stockholders' equity	$ 382,520	$ 394,844

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Allowance for credit losses	$ 411	$ 2,600
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	31,126,326	30,303,395
Common stock, shares outstanding	30,415,095	29,592,164
Treasury stock, shares (in shares)	711,231	711,231

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Costs of contract revenues	166,932	178,614	476,763	463,645
Gross profit	22,501	20,893	63,003	44,952
Selling, general and administrative expenses	15,270	14,590	47,651	44,677
Amortization of intangible assets	519	662	1,552	1,980
Gain on disposal of assets, net	(6,373)	(451)	(7,734)	(1,197)
Operating income (loss)	13,085	6,092	21,534	(508)
Other (expense) income:
Other income	115	17	251	574
Interest income	57	75	151	317
Interest expense	(1,151)	(1,678)	(3,722)	(4,981)
Other expense, net	(979)	(1,586)	(3,320)	(4,090)
Income (loss) before income taxes	12,106	4,506	18,214	(4,598)
Income tax expense	303	467	1,660	920
Net income (loss)	$ 11,803	$ 4,039	$ 16,554	$ (5,518)
Basic earnings (loss) per share (in dollars per share)	$ 0.39	$ 0.14	$ 0.55	$ (0.19)
Diluted earnings (loss) per share (in dollars per share)	$ 0.39	$ 0.14	$ 0.55	$ (0.19)
Shares used to compute income (loss) per share:
Basic (in shares)	30,372,310	29,544,288	30,020,258	29,240,979
Diluted (in shares)	30,372,310	29,547,185	30,020,258	29,240,979

Consolidated Statements of Comp

Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11,803	$ 4,039	$ 16,554	$ (5,518)
Change in fair value of cash flow hedge, net of tax expense of $44 and tax benefit of $173 for the three and nine months ended September 30, 2020, respectively and net of tax benefit of $55 and $280 for the three and nine months ended September 30, 2019.	150	(148)	(577)	(938)
Total comprehensive income (loss)	$ 11,953	$ 3,891	$ 15,977	$ (6,456)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Change in fair value of cash flow hedge, tax (benefit)	$ 44	$ (55)	$ (173)	$ (280)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings	Total
Beginning balance, shares at Dec. 31, 2018	29,611,989
Beginning balance at Dec. 31, 2018	$ 296	$ (6,540)	$ (52)	$ 179,742	$ (31,861)	$ 141,585
Beginning treasury stock, shares at Dec. 31, 2018		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				664		664
Exercise of stock options, shares	7,021
Exercise of stock options				35		35
Issue restricted stock, shares	185,204
Issuance of restricted stock	$ 1			(1)
Forfeiture of restricted stock (in shares)	(18,207)
Cash flow hedge			(284)			(284)
Net income (loss)					(7,924)	(7,924)
Ending balance, shares at Mar. 31, 2019	29,786,007
Ending treasury stock, shares at Mar. 31, 2019		(711,231)
Ending balance at Mar. 31, 2019	$ 297	$ (6,540)	(336)	180,440	(39,785)	134,076
Beginning balance, shares at Dec. 31, 2018	29,611,989
Beginning balance at Dec. 31, 2018	$ 296	$ (6,540)	(52)	179,742	(31,861)	141,585
Beginning treasury stock, shares at Dec. 31, 2018		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						(5,518)
Ending balance, shares at Sep. 30, 2019	30,261,584
Ending treasury stock, shares at Sep. 30, 2019		(711,231)
Ending balance at Sep. 30, 2019	$ 303	$ (6,540)	(1,270)	182,062	(37,379)	137,176
Beginning balance, shares at Mar. 31, 2019	29,786,007
Beginning balance at Mar. 31, 2019	$ 297	$ (6,540)	(336)	180,440	(39,785)	134,076
Beginning treasury stock, shares at Mar. 31, 2019		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				1,064		1,064
Issue restricted stock, shares	479,590
Issuance of restricted stock	$ 6			(6)
Forfeiture of restricted stock (in shares)	(50,513)
Forfeiture of restricted stock	$ (1)			1
Cash flow hedge			(758)			(758)
Net income (loss)					(1,633)	(1,633)
Ending balance, shares at Jun. 30, 2019	30,215,084
Ending treasury stock, shares at Jun. 30, 2019		(711,231)
Ending balance at Jun. 30, 2019	$ 302	$ (6,540)	(1,094)	181,499	(41,418)	132,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				564		564
Issue restricted stock, shares	46,500
Issuance of restricted stock	$ 1			(1)
Cash flow hedge			(176)			(176)
Net income (loss)					4,039	4,039
Ending balance, shares at Sep. 30, 2019	30,261,584
Ending treasury stock, shares at Sep. 30, 2019		(711,231)
Ending balance at Sep. 30, 2019	$ 303	$ (6,540)	(1,270)	182,062	(37,379)	$ 137,176
Beginning balance, shares at Dec. 31, 2019	30,303,395					30,303,395
Beginning balance at Dec. 31, 2019	$ 303	$ (6,540)	(1,045)	182,523	(37,220)	$ 138,021
Beginning treasury stock, shares at Dec. 31, 2019		(711,231)				(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				462		$ 462
Issue restricted stock, shares	185,356
Issuance of restricted stock	$ 2			(2)
Forfeiture of restricted stock (in shares)	(3,351)
Cash flow hedge			(984)			(984)
Net income (loss)					2,723	2,723
Ending balance, shares at Mar. 31, 2020	30,485,400
Ending treasury stock, shares at Mar. 31, 2020		(711,231)
Ending balance at Mar. 31, 2020	$ 305	$ (6,540)	(2,029)	182,983	(34,497)	$ 140,222
Beginning balance, shares at Dec. 31, 2019	30,303,395					30,303,395
Beginning balance at Dec. 31, 2019	$ 303	$ (6,540)	(1,045)	182,523	(37,220)	$ 138,021
Beginning treasury stock, shares at Dec. 31, 2019		(711,231)				(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)						$ 16,554
Ending balance, shares at Sep. 30, 2020	31,126,326					31,126,326
Ending treasury stock, shares at Sep. 30, 2020		(711,231)				(711,231)
Ending balance at Sep. 30, 2020	$ 311	$ (6,540)	(1,795)	184,214	(20,666)	$ 155,524
Beginning balance, shares at Mar. 31, 2020	30,485,400
Beginning balance at Mar. 31, 2020	$ 305	$ (6,540)	(2,029)	182,983	(34,497)	140,222
Beginning treasury stock, shares at Mar. 31, 2020		(711,231)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				1,167		1,167
Issue restricted stock, shares	638,938
Issuance of restricted stock	$ 6			(6)
Forfeiture of restricted stock (in shares)	(54,510)
Purchase of vested stock-based awards	(9,727)
Purchase of vested stock-based awards				(24)		(24)
Cash flow hedge			40			40
Net income (loss)					2,028	2,028
Ending balance, shares at Jun. 30, 2020	31,060,101
Ending treasury stock, shares at Jun. 30, 2020		(711,231)
Ending balance at Jun. 30, 2020	$ 311	$ (6,540)	(1,989)	184,120	(32,469)	143,433
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation				258		258
Issue restricted stock, shares	118,750
Issuance of restricted stock	$ 1			(1)
Purchase of vested stock-based awards	(52,525)
Purchase of vested stock-based awards	$ (1)			(163)		(164)
Cash flow hedge			194			194
Net income (loss)					11,803	$ 11,803
Ending balance, shares at Sep. 30, 2020	31,126,326					31,126,326
Ending treasury stock, shares at Sep. 30, 2020		(711,231)				(711,231)
Ending balance at Sep. 30, 2020	$ 311	$ (6,540)	$ (1,795)	$ 184,214	$ (20,666)	$ 155,524

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income (loss)	$ 16,554	$ (5,518)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	18,175	19,609
Amortization of ROU operating leases	4,449	4,145
Amortization of ROU finance leases	2,487	1,733
Unamortized debt issuance costs upon debt modification		399
Amortization of deferred debt issuance costs	529	312
Deferred income taxes	27	44
Stock-based compensation	1,887	2,292
Gain on disposal of assets, net	(7,734)	(1,197)
Allowance for credit losses	(487)
Change in operating assets and liabilities:
Accounts receivable	12,151	(35,242)
Income tax receivable		(330)
Inventory	(291)	310
Prepaid expenses and other	1,667	1,674
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,807)	(29,063)
Accounts payable	(22,583)	13,702
Accrued liabilities	26,282	1,660
Operating lease liabilities	(4,079)	(4,434)
Income tax payable	(1,037)	755
Billings in excess of costs and estimated earnings on uncompleted contracts	(7,814)	27,252
Net cash provided by (used in) operating activities	38,376	(1,897)
Cash flows from investing activities:
Proceeds from sale of property and equipment	5,821	1,363
Purchase of property and equipment	(9,444)	(13,035)
Contributions to CSV life insurance	(99)	(550)
Insurance claim proceeds related to property and equipment	1,525	2,574
Net cash used in investing activities	(2,197)	(9,648)
Cash flows from financing activities:
Borrowings from Credit Facility	10,000	49,000
Payments made on borrowings from Credit Facility	(41,225)	(59,460)
Proceeds from sale-leaseback arrangement		18,210
Loan costs from Credit Facility	(369)	(1,430)
Payments of finance lease liabilities	(2,751)	(2,144)
Purchase of vested stock-based awards	(188)
Exercise of stock options		35
Net cash (used in) provided by financing activities	(34,533)	4,211
Net change in cash and cash equivalents	1,646	(7,334)
Cash and cash equivalents at beginning of period	1,086	8,684
Cash and cash equivalents at end of period	2,732	1,350
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	2,676	5,202
Taxes, net of refunds	$ 2,500	$ 444

Description of Business and Bas

Description of Business and Basis of Presentation	9 Months Ended
Description of Business and Basis of Presentation	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	1. Description of Business Orion Group Holdings, Inc., its subsidiaries and affiliates (hereafter collectively referred to as the "Company"), provide a broad range of specialty construction services in the infrastructure, industrial, and building sectors of the continental United States, Alaska, Canada and the Caribbean Basin. The Company’s marine segment services the infrastructure sector through marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services. Its concrete segment services the building sector by providing 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 ("CODM") to allocate resources and assess performance are based on two reportable and operating segments: marine, which operates under the Orion brand and logo, and concrete, which operates under the TAS Commercial Concrete brand and logo. Although we describe the business in this report in terms of the services the Company provides, its base of customers and the areas in which it operates, the Company has determined that its operations currently comprise two reportable segments pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting In making this determination, the Company considered the similar economic characteristics of its operations that comprise its marine segment. For the marine segment, the methods used, and the internal processes employed, to deliver 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, U.S. Environmental Protection Agency and U.S. Occupational Safety and Health Administration ("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 the concrete segment, the Company also considered the similar economic characteristics of these operations. The methods used, and the internal processes employed, to deliver 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 development, 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 The accompanying condensed consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted. Readers of this report should also read the Company’s condensed consolidated financial statements and the notes thereto included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2019 (“2019 Form 10-K”) as well as Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments considered necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows for the periods presented. Such adjustments are of a normal recurring nature. Interim results of operations for the three and nine months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020. Certain amounts in the prior year financial statements have been reclassified to conform to the current year presentation in the Company’s condensed consolidated statement of operations. As part of the Company’s Invest, Scale and Grow (“ISG”) initiative it realigned its project management personnel within the operating groups for the combined company. As a result of the realignment, beginning in the second quarter of 2019, the Company has elected to classify certain project management costs in Cost of contract revenue in its Condensed Consolidated Statements of Operations (the “Statements of Operations”) to better represent how those costs are managed and controlled. For periods reported prior to the second quarter of 2019, certain project management costs were included in Selling, general and administrative (“SG&A”) expenses. The Company’s SG&A expense for 2019 included project management costs of $1.1 million incurred in the first quarter of 2019.

Summary of Significant Accounti

Summary of Significant Accounting Principles	9 Months Ended
Summary of Significant Accounting Principles	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Principles	2. The preparation of condensed 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 condensed consolidated financial statements, including, but not limited to, those related to: ● Revenue recognition from construction contracts; ● Accounts receivable and allowance for credit losses; ● Property, plant and equipment; ● Leases; ● Finite and infinite-lived intangible assets, testing for indicators of impairment; ● Stock-based compensation; ● Income taxes; and ● Self-insurance Revenue Recognition The Company adopted ASU 2014-09, Revenue from Contracts with Customers The Company’s revenue is derived from contracts to provide marine construction, dredging, turnkey concrete services, and other specialty services. The Company’s projects are typically short in duration and usually span a period of less than one year. The Company determines the appropriate accounting treatment for each contract before work begins and generally records revenue on contracts over time. Performance obligations are promises in a contract to transfer distinct goods or services to the customer and are the unit of account under Topic 606. The Company’s contracts and related change orders typically represent a single performance obligation because the Company provides a significant integrated service and individual goods and services are not separately identifiable. Revenue is recognized over time because control is continuously transferred to the customer. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using its best estimate of the stand-alone selling price of each distinct good or service. Progress is measured by the percentage of actual 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 costs include all direct costs, such as material and labor, and those indirect costs incurred that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Upfront costs, such as costs to mobilize personnel and equipment prior to satisfying a performance obligation are capitalized and amortized over the contract performance period. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and reported revenue and are recognized in the period in which the revisions are determined. The effect of changes in estimates of contract revenue or contract costs is recognized as an adjustment to recognized revenue on a cumulative catch-up basis. When losses on uncompleted contracts are anticipated, the entire loss is recognized in the period in which such losses are determined. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable. Contract revenue is derived from the original contract price as modified by agreed-upon change orders and estimates of variable consideration related to incentive fees and change orders or claims for which price has not yet been agreed by the customer. The Company estimates variable consideration based on its assessment of the most likely amount to which it expects to be entitled. Variable consideration is included in the estimated recognition of revenue to the extent it is probable that a significant reversal of cumulative recognized revenue will not occur. A determination that the collection of a claim is probable is based upon compliance with the terms of the contract and the extent to which the Company performed in accordance therewith but does not guarantee collection in full. Contract assets and liabilities include the following: ● Accounts Receivable: Trade, net of allowance - Represent amounts billed and currently due from customers and are stated at their estimated net realizable value. ● Accounts Receivable: Retainage - Represent amounts which have not been billed to or paid by customers due to retainage provisions in construction contracts, which amounts generally become payable upon contract completion and acceptance by the customer. ● Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts - Represent revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract (i.e. Contract Assets) and are recorded as a current asset, until such amounts are either received or written off. ● Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts - Represent billings in excess of revenues recognized (i.e. Contract Liabilities) and are recorded as a current liability, until the underlying obligation has been performed or discharged. Remaining performance obligations represent the transaction price of firm orders or other written contractual commitments from customers for which work has not been performed or is partially completed and excludes unexercised contract options and potential orders. As of September 30, 2020, the aggregate amount of the remaining performance obligations was approximately $428.8 million. Of this amount, the current expectation of the Company is that it will recognize $386.6 million, or 90%, in the next 12 months and the remaining balance thereafter. 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, Cash Equivalents and Restricted Cash 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 September 30, 2020 and December 31, 2019 consisted primarily of overnight bank deposits. Restricted cash of $1.0 million at December 31, 2019 consisted of collateral related to a marine project that was completed during the quarter ended June 30, 2020. The Company had no restricted cash as of September 30, 2020. Risk Concentrations Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of 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 is 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, net of allowances for credit losses. The Company has significant investments in billed and unbilled receivables as of September 30, 2020 and December 31, 2019. 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 contracts, which are included in costs in excess of billings, arise as revenues are recognized over time. Unbilled amounts on 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 credit losses, 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 potentially uncollectible accounts receivable against the allowance for credit losses 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 September 30, 2020, and December 31, 2019, the Company has recorded an allowance for credit losses of $0.4 million and $2.6 million, respectively. 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 September 30, 2020 totaled $36.2 million, of which $7.2 million is expected to be collected beyond September 30, 2021. Retainage at December 31, 2019 totaled $42.5 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 amounts previously recorded, which could result in the recording of a loss in the amount of the shortfall. 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. Environmental Costs Costs related to environmental remediation are charged to expense. Other environmental costs are also charged to expense except to the extent 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 recognize any environmental liabilities as of September 30, 2020 or December 31, 2019, other than those involved in insurance reserves. See Note 16 Fair Value Measurements The Company evaluates and presents certain amounts included in the accompanying condensed 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 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. 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 the Company, 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 long-lead times for manufacture or fabrication but must be kept on hand to reduce downtime. Refer to Note 7 Property and Equipment Property and equipment are recorded at cost. 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 When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in results of operations for the respective period. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, 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 The Company generally uses accelerated depreciation methods for tax purposes where appropriate. Dry-docking costs are capitalized and amortized using the straight-line method over a period ranging from three Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset or asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or the fair value, less the costs to sell, and are no longer depreciated. There were no assets classified as held for sale as of September 30, 2020 or December 31, 2019. Leases The Company adopted ASU 2016-02, Leases Note 18 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 infinite lives are not amortized but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset may be impaired. The Company has one infinite-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. See Note 9 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 Black-Scholes option-pricing model requires the use of subjective assumptions in the computation. Changes in these assumptions can cause significant fluctuations in the fair value of the option award. 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 closing price of the stock on the date 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. This assessment is updated on a periodic basis. See Note 15 Income Taxes The Company determines its consolidated income tax provision using the asset and 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, Income Taxes See Note 13 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 marine segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The marine segment’s excess loss coverage responds to all key marine liability policies when a primary limit of $1 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10 million and the Watercraft Pollution Policy primary limit is $5 million. The concrete segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The concrete segment’s excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted. If a claim arises and a potential insurance recovery is probable, the impending gain is recognized separately from the related loss. The recovery will only be recognized up to the amount of the loss once the recovery of the claim is deemed probable and any excess gain will fall under contingency accounting and will only be recognized once it is realized. The Company does not net insurance recoveries against the related claim liability as the amount of the claim liability is determined without consideration of the anticipated insurance recoveries from third parties. Separately, the Company’s marine segment employee health care is not covered by primary insurance, with claims being paid out of general assets of the Company and the insurance program being currently administered by a third party. The administrator has purchased appropriate stop-loss coverage. Losses on these policies up to the deductible amounts are accrued based upon reported 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 Condensed Consolidated Statements of Operations in the period in which they become known. The Company’s concrete 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, is expected to receive a partial refund after the policy expiration. The total accrual for insurance claims liabilities was $24.5 million and $3.7 million at September 30, 2020 and December 31, 2019, respectively. The total accrual for insurance claims receivable was $23.5 million and $1.1 million at September 30, 2020 and December 31, 2019, respectively. Accounting Standards Adopted in 2020 The Financial Accounting Standards Board (“FASB”) issues accounting standards and 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. In Measurement of Credit Losses on Financial Instruments

Revenue

Revenue	9 Months Ended
Revenue	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue	3. Contract revenues are recognized when control of the promised goods or services is transferred to the customer in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The following table represents a disaggregation of the Company’s contract revenues by service line for the marine and concrete segments: Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Marine Segment Construction $ 86,505 $ 72,609 $ 205,459 $ 163,426 Dredging 24,262 29,404 79,391 82,762 Specialty Services 2,114 5,391 5,699 11,726 Marine segment contract revenues $ 112,881 $ 107,404 $ 290,549 $ 257,914 Concrete Segment Structural $ 21,116 $ 13,439 $ 66,893 $ 37,595 Light Commercial 55,436 78,587 182,311 212,958 Other — 77 13 130 Concrete segment contract revenues $ 76,552 $ 92,103 $ 249,217 $ 250,683 Total contract revenues $ 189,433 $ 199,507 $ 539,766 $ 508,597 The Company has determined that it has two reportable segments pursuant to FASB ASC Topic 280, Segment Reporting Note 1 Marine Segment Construction services include construction, restoration, maintenance, dredging and repair of marine transportation facilities, marine pipelines, bridges and causeways and marine environmental structures. Dredging services generally enhance or preserve the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Specialty services include design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation and repair. Concrete Segment Structural services include elevated concrete pouring for products such as columns, elevated beams and structural walls. Light commercial services include horizontally poured concrete for products such as sidewalks, ramps, tilt walls and trenches. Other services comprise labor related to concrete pouring such as rebar installation and pumping services and typically support the Company’s structural and light commercial services.

Concentration of Risk and Enter

Concentration of Risk and Enterprise Wide Disclosures	9 Months Ended
Concentration of Risk and Enterprise Wide Disclosures	Sep. 30, 2020
Risks and Uncertainties [Abstract]
Concentration of Risk and Enterprise Wide Disclosures	4. Accounts receivable in both reportable segments 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 accounts receivable from customers (trade and retainage) at September 30, 2020 and December 31, 2019, respectively: September 30, 2020 December 31, 2019 Federal Government $ 258 - % $ 4,765 3 % State Governments 382 - % 5,864 4 % Local Governments 22,870 18 % 41,944 26 % Private Companies 103,743 82 % 109,114 67 % Gross receivables 127,253 100 % 161,687 100 % Allowance for credit losses (411) (2,600) Net receivables $ 126,842 $ 159,087 At September 30, 2020 no single customer accounted for more than 10.0% of total current receivables. At December 31, 2019, no single customer accounted for more than 10.0% of total current receivables. Additionally, the table below represents concentrations of contract revenue by type of customer for the three and nine months ended September 30, 2020 and 2019, respectively: Three months ended September 30, Nine months ended September 30, 2020 % 2019 % 2020 % 2019 % Federal Government $ 16,499 9 % $ 13,564 7 % $ 32,720 6 % $ 36,142 7 % State Governments 6,322 3 % 19,872 10 % 27,646 5 % 34,213 7 % Local Government 54,316 29 % 54,654 27 % 158,176 29 % 150,683 30 % Private Companies 112,296 59 % 111,417 56 % 321,224 60 % 287,559 56 % Total contract revenues $ 189,433 100 % $ 199,507 100 % $ 539,766 100 % $ 508,597 100 % In the three months ended September 30, 2020, one customer in the Local Governments category accounted for 13.8% of total contract revenues. In the three months ended September 30, 2019, no single customer accounted for more than 10% of total contract revenues. In the nine months ended September 30, 2020, one customer in the Local Governments category accounted for 11.2% of total contract revenues. In the nine months ended September 30, 2019, no single customer accounted for more than 10% of total contract revenues. The Company does not believe that the loss of any one of its customers would have a material adverse effect on the Company or its subsidiaries and affiliates since no single specific customer sustains such a large portion of receivables or contract revenue over time. The concrete segment primarily purchases concrete from select suppliers. The loss of any one of these suppliers could adversely impact short-term operations. Contract revenues generated outside the United States totaled 0.9% and 2.3% of total revenues for the three months ended September 30, 2020 and 2019, respectively, and 1.8% and 1.5% for the nine months ended September 30, 2020 and 2019, respectively, and were primarily located in the Caribbean Basin and Mexico.

Contracts in Progress

Contracts in Progress	9 Months Ended
Contracts in Progress	Sep. 30, 2020
Contractors [Abstract]
Contracts in Progress	5. Contracts in progress are as follows at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 Costs incurred on uncompleted contracts $ 1,104,441 $ 884,244 Estimated earnings 200,816 144,160 1,305,257 1,028,404 Less: Billings to date (1,303,028) (1,035,796) $ 2,229 $ (7,392) Included in the accompanying Condensed Consolidated Balance Sheets under the following captions: Costs and estimated earnings in excess of billings on uncompleted contracts $ 43,196 $ 41,389 Billings in excess of costs and estimated earnings on uncompleted contracts (40,967) (48,781) $ 2,229 $ (7,392) Included in cost and estimated earnings in excess of billings on uncompleted projects is approximately $3.2 million and $0.1 million at September 30, 2020 and December 31, 2019, respectively, related to claims and unapproved change orders. See Note 2 - Summary of Significant Accounting Policies Contract costs include all direct costs, such as materials and labor, and those indirect costs incurred that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Incentive fees, if available, are billed to the customer based on the terms and conditions of the contract. 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. Changes in job performance and job conditions, 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 contracts in progress are made in the period in which such losses are determined, without regard to the percentage of completion.

Property and Equipment

Property and Equipment	9 Months Ended
Property and Equipment	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Property and Equipment	6. The following is a summary of property and equipment at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 Automobiles and trucks $ 2,267 $ 2,161 Building and improvements 44,324 44,278 Construction equipment 145,774 153,147 Vessels and other equipment 75,511 84,022 Office equipment 9,052 8,652 276,928 292,260 Less: Accumulated depreciation (190,748) (196,973) Net book value of depreciable assets 86,180 95,287 Construction in progress 3,868 1,198 Land 35,863 35,863 $ 125,911 $ 132,348 For the three months ended September 30, 2020 and 2019, depreciation expense was $5.3 million and $5.8 million, respectively. For the nine months ended September 30, 2020 and 2019, depreciation expense was $16.6 million and $17.6 million, respectively. Substantially all depreciation expense is included in the cost of contract revenue in the Company’s Condensed 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. See Note 2

Inventory

Inventory	9 Months Ended
Inventory	Sep. 30, 2020
Inventory Disclosure [Abstract]
Inventory	7. Current inventory at both September 30, 2020 and December 31, 2019 of $1.9 million and $1.1 million, respectively, consisted primarily of spare parts and small equipment held for use in the ordinary course of business. Non-current inventory at September 30, 2020 and December 31, 2019 totaled $6.5 million and $7.0 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	9 Months Ended
Fair Value	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value	8. 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 September 30, 2020 and December 31, 2019: Fair Value Measurements Carrying Value Level 1 Level 2 Level 3 September 30, 2020 Assets: Cash surrender value of life insurance policy $ 2,895 — 2,895 — Liabilities: Derivatives $ 1,795 — 1,795 — December 31, 2019 Assets: Cash surrender value of life insurance policy $ 2,714 — 2,714 — Liabilities: Derivatives $ 1,045 — 1,045 — 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 Our concrete segment has life insurance policies with a combined face value of $11.1 million as of September 30, 2020. 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 Company’s Condensed 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 the infinite-lived intangible asset. Other Fair Value Measurements The fair value of the Company’s debt at September 30, 2020 and December 31, 2019 approximated its carrying value of $42.1 million and $73.3 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	9 Months Ended
Goodwill and Intangible Assets	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9. Intangible assets The tables below present the activity and amortizations of finite-lived intangible assets: September 30, December 31, 2020 2019 Finite-lived intangible assets, beginning of period $ 35,240 $ 35,240 Additions — — Total finite-lived intangible assets, end of period $ 35,240 $ 35,240 Accumulated amortization, beginning of period $ (29,985) $ (27,345) Current year amortization (1,552) (2,640) Total accumulated amortization (31,537) (29,985) Net finite-lived intangible assets, end of period $ 3,703 5,255 Infinite-lived intangible assets 6,892 6,892 Total net intangible assets $ 10,595 $ 12,147 Remaining net finite-lived intangible assets were acquired as part of the purchase of TAS during 2015 and TBC during 2017 and included customer relationships. Customer relationships were valued at approximately $18.8 million and are being amortized over eight years using an accelerated method based on the pattern in which the economic benefits of the assets are consumed. For the nine months ended September 30, 2020, $1.6 million of amortization expense was recognized for these assets. Future expense remaining of approximately $3.7 million will be amortized as follows: 2020 517 2021 1,521 2022 1,239 2023 389 2024 37 $ 3,703 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 in excess of the carrying value, therefore no impairment was recorded.

Accrued Liabilities

Accrued Liabilities	9 Months Ended
Accrued Liabilities	Sep. 30, 2020
Payables and Accruals [Abstract]
Accrued Liabilities	10. Accrued liabilities at September 30, 2020 and December 31, 2019 consisted of the following: September 30, 2020 December 31, 2019 Accrued salaries, wages and benefits $ 12,919 $ 7,323 Accrual for insurance claims liabilities 24,135 3,714 Sales taxes 4,774 3,021 Property taxes 1,573 389 Sale-leaseback arrangement 529 482 Accounting and audit fees 254 267 Interest — 76 Equipment purchase 921 — Other accrued expenses 820 1,694 Total accrued liabilities $ 45,925 $ 16,966

Long-term Debt And Line of Cred

Long-term Debt And Line of Credit	9 Months Ended
Long-term Debt And Line of Credit	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-term Debt and Line of Credit	11. The Company entered into an amended syndicated credit agreement (the “Credit Agreement” also known as the “Fourth Amendment”) on July 31, 2018 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, KeyBank National Association, NBH Bank, IBERIABANK, Trustmark National Bank, First Tennessee Bank NA, and Branch Banking and Trust Company. The Credit Facility matures on July 31, 2023. The Credit Agreement, which may be amended from time to time, provides for borrowings under a revolving line of credit and a term loan (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. 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. Total debt issuance costs for the Fourth Amendment, which included underwriter fees, legal fees and syndication fees were approximately $0.9 million and were capitalized as non-current deferred charges and amortized using the effective interest rate method over the duration of the loan. Additionally, the Company executed the Fifth Amendment during March 2019, which was made effective as of December 31, 2018, and executed the Sixth Amendment during May 2019. The Company incurred additional debt issuance costs of approximately $0.6 million and $0.9 million respectively for the Fifth and Sixth Amendments. With the execution of the aforementioned Sixth Amendment, $50.0 million of the existing revolving line of credit was modified and accounted for under guidelines of ASC 470-50, Debt, Modifications and Extinguishments, and a pro-rated portion of unamortized debt issuance costs of approximately $0.4 million was recognized as interest expense as of May 2019. The remaining debt issuance costs of approximately $0.9 million related to the Fourth, Fifth, and Sixth Amendments will be amortized over the duration of the loan. The Company entered into a new syndicated credit agreement (the “364-Day Revolving Credit Facility”) on June 8, 2020 with Regions Bank, as administrative agent and collateral agent, and the following co-syndication agents: Bank of America, N.A. and BOKF, NA dba Bank of Texas. Concurrent with this the Company executed an amendment to the Credit Agreement with its existing lenders (“also known as the “Seventh Amendment”) for the sole intent and outcome of executing the 364-Day Revolving Credit Facility. The 364-Day Revolving Credit Facility, which may be amended from time to time, provides for borrowings under a new revolving line of credit. The 364-Day Revolving 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 Permitted Acquisitions, and to pay transaction fees, costs and expenses related to the consummation of the Seventh Amendment. 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. Principal balances drawn under the 364- Day Revolving Credit Facility may be prepaid at any time, in whole or in part, without premium or penalty. Amounts repaid under the 364-Day Revolving Credit Facility may be re-borrowed. The 364-Day Revolving Credit Facility matures on June 7, 2021. Total debt issuance costs for the 364-Day Revolving Credit Facility, which included underwriter fees, legal fees and syndication fees were approximately $0.4 million and were capitalized as current deferred charges and will be amortized over the duration of the loan. The quarterly weighted average interest rate for the Credit Facility as of September 30, 2020 was 2.58%. The Company’s obligations under debt arrangements consisted of the following: September 30, 2020 December 31, 2019 Debt Issuance Debt Issuance Principal Costs (1) Total Principal Costs (1) Total Term loan - current $ 4,500 $ (153) $ 4,347 $ 3,750 $ (82) $ 3,668 Total current debt 4,500 (153) 4,347 3,750 (82) 3,668 Revolving line of credit 10,000 (341) 9,659 36,000 (782) 35,218 Term loan - long-term 27,565 (939) 26,626 33,540 (729) 32,811 Total long-term debt 37,565 (1,280) 36,285 69,540 (1,511) 68,029 Total debt $ 42,065 $ (1,433) $ 40,632 $ 73,290 $ (1,593) $ 71,697 (1) Total debt issuance costs include underwriter fees, legal fees and syndication fees and fees related to the execution of the Fourth, Fifth, Sixth and Seventh Amendments to the Credit Agreement. Provisions of the revolving line of credit The 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. There is a letter of credit sublimit that is equal to the lesser of $20.0 million and the aggregate unused amount of the revolving commitments then in effect. There is also a swingline sublimit 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 drawn in an aggregate minimum amount of $1.0 million and integral multiples of $250,000 in excess of that amount. Swingline loans must be drawn 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 borrowing availability 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, July 31, 2023, or the date the outstanding balance is permanently reduced to zero, in accordance with the terms of the amended Credit Facility. The maturity date for amounts drawn under the revolving line of credit is the earlier of the Facility termination date of July 31, 2023, or the date the outstanding balance is permanently reduced to zero. Prior to the fourth quarter of 2018, the Company classified amounts drawn as current liabilities based on an intent and ability to repay the amounts using current assets within the next twelve months. During the fourth quarter of 2018, the Company determined it no longer has the intent to repay amounts drawn within the next twelve months. As of September 30, 2020, the Company determined that it still does not have the intent to repay amounts drawn within the next twelve months. Therefore, the Company has classified the entire outstanding balance of the revolving line of credit as non-current. As of September 30, 2020, the outstanding balance for all borrowings under the revolving line of credit was $10.0 million, where $5.0 million was designated as an Adjusted LIBOR Rate Loan at a rate of 2.44% and $5.0 million was designated as a Base Rate Loan at a rate of 4.5%. There were also $2.1 million in outstanding letters of credit as of September 30, 2020, which reduced the maximum borrowing availability on the revolving line of credit to $37.9 million as of September 30, 2020. During the nine months ended September 30, 2020, the Company drew down $10.0 million for general corporate purposes and made payments of $36.0 million on the revolving line of credit which resulted in a net decrease of $26.0 million. Provisions of the 364-day revolving credit facility The Company has a maximum borrowing availability under the 364-Day The Company is subject to a commitment fee for the unused portion of the maximum borrowing availability under the 364-Day Revolving Credit Facility. 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. As of September 30, 2020, there were no outstanding borrowings under the 364-Day Revolving Credit Facility. Provisions of the term loan The original principal amount of $60.0 million for the term loan commitment is paid off in quarterly installment payments (as stated in the Credit Agreement). At September 30, 2020, the outstanding term loan component of the Credit Facility totaled $32.1 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: 2020 1,125 2021 4,500 2022 5,250 2023 21,190 $ 32,065 During the nine months ended September 30, 2020 the Company made the scheduled quarterly principal payments of $2.6 million, and an additional principal paydown of $2.6 million with proceeds from the sale of equipment which reduced the outstanding principal balance to $32.1 million as of September 30, 2020. The current portion of debt is $4.5 million, and the non-current portion is $27.6 million. As of September 30, 2020, the term loan was designated as an Adjusted LIBOR Rate Loan with an interest rate of 2.44%. Financial covenants Restrictive financial covenants under the Credit Facility include: ● A consolidated Fixed Charge Coverage Ratio to not be less than the following during each noted period: - Fiscal Quarter Ending December 31, 2019 and each Fiscal Quarter thereafter, to not be less than 1.25 to 1.00. ● A consolidated Leverage Ratio to not exceed the following during each noted period: - Fiscal Quarter Ending March 31, 2020 and each Fiscal Quarter thereafter, to not exceed 3.00 to 1.00. In addition, the Credit Facility contains events of default that are usual and customary for similar arrangements, 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. The Company was in compliance with all financial covenants as of September 30, 2020. 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 was 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 was scheduled to expire and be immediately replaced with a new interest rate swap until the expiration of the final swap on July 31, 2020. On December 6, 2018, the Company entered into a sixth receive-variable, pay-fixed interest rate swap to hedge the variability of interest payments. The sixth swap began with a notional amount of $27.0 million on July 31, 2020 and hedges the variability in the interest payments on the aggregate scheduled principal amount of the Regions Term Loan outstanding. The sixth swap is scheduled to expire on July 31, 2023. At inception, these interest rate swaps were designated as cash flow hedges for hedge accounting, and as such, the effective portion of unrealized changes in market value are recorded in other comprehensive income (loss) 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 for the comparative periods ended September 30, 2020 and September 30, 2019, as reflected in accumulated other comprehensive loss in the Condensed Consolidated Statements of Stockholders’ Equity, is approximately $0.8 million and $1.2 million. The fair market value of the swaps as of September 30, 2020 is reflected as a liability of $1.8 million on the Condensed Consolidated Balance Sheets. See Note 8

Other Long-Term Liabilities

Other Long-Term Liabilities	9 Months Ended
Other Long-Term Liabilities	Sep. 30, 2020
Liabilities, Other than Long-term Debt, Noncurrent [Abstract]
Other Long-Term Liabilities	12. Other long-term liabilities at September 30, 2020 and December 31, 2019 consisted of the following: September 30, 2020 December 31, 2019 Sale-leaseback arrangement $ 16,953 $ 17,447 Deferred compensation 2,752 2,528 Accrual for insurance claims liabilities 348 461 Total other long-term liabilities $ 20,053 $ 20,436 Sale-Leaseback Arrangement On September 27, 2019, the Company entered into a purchase and sale agreement (the “Purchase and Sale Agreement”). Pursuant to the terms of the Purchase and Sale Agreement, the Company sold its 17300 & 17140 Market Street location in Channelview, Texas (the “Property”) for a purchase price of $19.1 million. Concurrent with the sale of the Property, the Company entered into a fifteen-year lease agreement (the “Lease Agreement”), whereby the Company will lease back the Property at an annual rental rate of approximately $1.5 million, subject to annual rent increases of 2.0% . Under the Lease Agreement, the Company has two consecutive options to extend the term of the Lease by ten years for each such option. This transaction was recorded as a failed sale-leaseback. The Company recorded a liability for the amounts received, will continue to depreciate the non-land portion of the asset, and has imputed an interest rate so that the net carrying amount of the financial liability and remaining assets will be zero at the end of the initial lease term. Concurrently with the sale, the Company paid $18.2 million towards the Term loan portion of the Company’s Credit Facility, consistent with terms of the Sixth Amendment.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	13. The Company’s effective tax rate is based on expected income, statutory rates and tax planning opportunities available to it. For interim financial reporting, the Company estimates its annual tax rate based on projected taxable income (loss) for the full year and records a quarterly tax provision in accordance with the anticipated annual rate. Income tax expense included in the Company’s accompanying Condensed Consolidated Statements of Operations was as follows (in thousands, except percentages): Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Income tax expense (benefit) $ 303 $ 467 $ 1,660 $ 920 Effective tax rate 2.5 % 10.4 % 9.1 % (20.0) % The effective rate for the three and nine months ended September 30, 2020 differed from the Company’s statutory federal rate of 21% primarily due to movement in the valuation allowance to offset foreign tax credits and net operating loss carryforwards, foreign taxes, state income taxes and the non-deductibility of certain permanent items. During the year ended December 31, 2019 the Company assessed the realizability of its deferred tax assets and determined that it was more likely than not that some portion or all the deferred tax assets would not be realized and therefore recorded a valuation allowance on the net deferred tax assets. The Company assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. The Company considers the scheduled reversal of deferred tax liabilities, available carryback periods, and tax-planning strategies in making this assessment. For the period ended September 30, 2020 the Company evaluated all positive and negative evidence in determining the amount of deferred tax assets more likely than not to be realized. Based on the review of available evidence, Management believes that a valuation allowance on the net deferred tax assets at September 30, 2020 remains appropriate. The Company does not expect that unrecognized tax benefits as of September 30, 2020 for certain federal income tax matters will significantly change due to any settlement and/or expiration of statutes of limitations over the next 12 months. The final outcome of these tax positions is not yet determinable. The Company’s uncertain tax benefits, if recognized, would affect the Company’s effective tax rate.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
Earnings (Loss) Per Share	Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	14. Basic earnings (loss) per share is based on the weighted average number of common shares outstanding during each period. Diluted earnings (loss) per share is based on the weighted average number of common shares outstanding as well as the effect of all dilutive common stock equivalents during each period net income is generated. For the three months ended September 30, 2020 and 2019, the Company had 1,086,882 and 1,614,192 securities, respectively, that were potentially dilutive in earnings per share calculations. For the nine months ended September 30, 2020 and 2019, the Company had 1,220,314 and 1,671,040 securities, respectively, that were potentially dilutive in earnings per share calculations. Such dilution is dependent on the excess of the market price of our stock over the exercise price and other components of the treasury stock method. The exercise price for certain stock options awarded by the Company exceeded the average market price of the Company’s common stock for the three and nine months ended September 30, 2020 and 2019. Such stock options are antidilutive and are not included in the computation of earnings (loss) per share for those periods. The following table reconciles the denominators used in the computations of both basic and diluted earnings (loss) per share: Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Basic: Weighted average shares outstanding 30,372,310 29,544,288 30,020,258 29,240,979 Diluted: Total basic weighted average shares outstanding 30,372,310 29,544,288 30,020,258 29,240,979 Effect of potentially dilutive securities: Common stock options — 2,897 — — Total weighted average shares outstanding assuming dilution 30,372,310 29,547,185 30,020,258 29,240,979

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	15. 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 2011 Long Term Incentive Plan (the "2011 LTIP") and 2017 Long Term Incentive Plan (the "2017 LTIP"), which was approved by shareholders in May 2017 and authorized the maximum aggregate number of shares to be issued of 2,400,000. In general, the Company’s 2017 LTIP 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 generally are 10 years from the date of issuance. Options generally vest over a three The Company applies a 3.2% and a 5.5% forfeiture rate, which is compounded over the vesting terms of the individual award, to its restricted stock and option grants, respectively, based on historical analysis. In the three months ended September 30, 2020 and 2019, compensation expense related to stock-based awards outstanding was $0.3 million and $0.6 million, respectively. In the nine months ended September 30, 2020 and 2019, compensation related to stock-based awards outstanding was $1.9 million and $2.3 million, respectively. In the three and nine months ended September 30, 2020, expense related to the purchase of vested stock-based awards for certain officers and directors of the Company was approximately $0.2 million. In February 2020, the Company granted an executive of the Company 15,121 shares of restricted common stock, which vested immediately on the date of grant. The fair value of all shares awarded on the date of grant was $4.96 per share. In March 2020, certain officers and executives of the Company were awarded 170,235 shares of restricted common stock with a vesting period of three years and a fair value of $3.73 per share. In May 2020, independent directors as well as certain officers and executives of the Company were awarded 638,938 shares of restricted common stock. The total number included 238,938 shares, which were awarded to the independent directors and vested immediately on the date of the grant, as well as 300,000 shares of performance-based stock awarded to certain executives. The performance-based stock will potentially vest 50% if the target is met, with 25% each vesting on the second and third anniversary of the determination that the target was met, with 100% of the shares to be earned based on the achievement of an objective, tiered return on invested capital, measured over a one-year performance period. The Company evaluates the probability of achieving this each reporting period. The fair value of all shares awarded on the date of the grant was $2.26 per share. In August 2020, the Company determined the performance-based stock awarded on May 24, 2019 vested at the outperformance level established above the target set based on the achievement of an objective, tiered return on invested capital, measured over a one-year performance period ending June 30, 2020. As a result, the executives earned an additional 93,750 shares of performance-based stock awards with a fair value of $1.96, of which 50% vested immediately on the date of determination and 25% each will vest on the first and second anniversary of the date of determination. In September 2020, the Company granted an executive of the Company 25,000 shares of restricted common stock with a vesting period of three years and a fair value of $2.58 per share. In the three and nine months ended September 30, 2020, there were no options exercised. In the three months ended September 30, 2019, there were no options exercised. In the nine months ended September 30, 2019, 7,021 options were exercised, generating proceeds to the Company of less than $0.1 million. At September 30, 2020, total unrecognized compensation expense related to unvested stock and options was approximately $2.4 million, which is expected to be recognized over a period of approximately two years.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	16. The Company and one former and two current officers were named defendants in a class action lawsuit filed on April 11, 2019 in the United States District Court for the Southern District of Texas, Houston Division, seeking unstated compensatory damages under the federal securities laws allegedly arising from materially false and misleading statements during the period of March 13, 2018 to March 18, 2019. The complaint asserted, among other things, that the current and former officers caused the Company to overstate goodwill in certain periods; overstate accounts receivable; that the company lacked effective internal controls over financial reporting related to goodwill impairment testing and accounts receivable; and that as a result certain adjustments to goodwill and accounts receivable materially impacted the company’s financial statements, which in turn caused the company’s stock price to be artificially inflated during the class period. The District Court granted the Company’s Motion to Dismiss the Complaint on June 29, 2020 and the ruling became final on July 20, 2020 after no appeal was filed. On August 21, 2020, a Company dredge, the Waymon L. Boyd In addition, the Company is involved in various other legal and other proceedings which are incidental to the conduct of its business, none of which in the opinion of management will have a material effect on the Company’s financial condition, results of operations or cash flows. Management believes that it has recorded adequate accrued liabilities and believes that it has adequate insurance coverage or has meritorious defenses for these other claims and contingencies. A legal matter was settled in the Company’s favor for $5.5 million during the first quarter of 2018. Settlement amounts were recorded in Other gain from continuing operations in the Condensed Consolidated Statement of Operations, Prepaid expenses and other (current portion of the notes receivable) and Other non-current assets (non-current portion of the notes receivable) in the Condensed Consolidated Balance Sheets. As of September 30, 2020, the current portion of the notes receivable was $0.8 million and the non-current portion was $2.0 million, net of $0.2 million of unamortized discount. Legal fees related to this matter were expensed as incurred during the respective reporting period. During the quarter ended September 30, 2020, the Company settled a long-standing dispute with a customer that resulted in recovery of $0.9 million of previously reserved accounts receivable.

Segment Information

Segment Information	9 Months Ended
Segment Information	Sep. 30, 2020
Segment Reporting [Abstract]
Segment Information	17. The Company currently operates in two reportable segments: marine and concrete. The Company’s financial reporting systems present various data for management to run the business, including profit and loss statements prepared according to the segments presented. Management uses operating income to evaluate performance between the two segments. Segment information for the periods presented is provided as follows: Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Marine Contract revenues $ 112,881 $ 107,404 $ 290,549 $ 257,914 Operating income (loss) $ 8,992 $ 4,863 $ 12,443 $ (1,584) Depreciation and amortization expense $ (4,543) $ (4,960) $ (14,063) $ (14,975) Total assets $ 258,894 $ 252,995 $ 258,894 $ 252,995 Property, plant and equipment, net $ 109,522 $ 117,071 $ 109,522 $ 117,071 Concrete Contract revenues $ 76,552 $ 92,103 $ 249,217 $ 250,683 Operating (loss) income $ 4,093 $ 1,229 $ 9,091 $ 1,076 Depreciation and amortization expense $ (2,223) $ (2,120) $ (6,599) $ (6,367) Total assets $ 123,626 $ 124,112 $ 123,626 $ 124,112 Property, plant and equipment, net $ 16,389 $ 16,985 $ 16,389 $ 16,985 There were less than $0.1 million and $2.7 million in intersegment revenues between the Company’s two reportable segments for the three and nine months ended September 30, 2020, respectively. There were $0.3 million and $0.5 million in intersegment revenues between the Company’s two reportable segments for the three and nine months ended September 30, 2019, respectively. The marine segment had foreign revenues of $1.8 million and $4.6 million for the three months ended September 30, 2020 and 2019, respectively, and $9.7 million and $7.5 million for the nine months ended September 30, 2020 and 2019, respectively. These revenues are derived from projects in the Caribbean Basin and Mexico and are paid primarily in U.S. dollars. There was no foreign revenue for the concrete segment.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2020
Leases [Abstract]
Leases	18. The Company has operating and finance leases for office space, equipment and vehicles. Management determines if a contract is or contains a lease at inception of the contract or modification of the contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset. Finance and operating lease ROU assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at commencement date. As the implicit rate is not determinable in most of the Company’s leases, management uses the Company’s incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The expected lease term includes options to extend or terminate the lease when it is reasonably certain the Company will exercise such option. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term. The Company’s lease arrangements have lease and non-lease components. Leases with an expected term of 12 months or less are not accounted for on the balance sheet and the related lease expense is recognized on a straight-line basis over the expected lease term. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. Leases recorded on the balance sheet consists of the following: September 30, December 31, Leases 2020 2019 Assets Operating lease right-of-use assets, net (1) $ 15,619 $ 17,997 Financing lease right-of-use assets, net (2) 12,775 7,896 Total assets $ 28,394 $ 25,893 Liabilities Current Operating $ 4,766 $ 5,043 Financing 4,543 2,788 Total current 9,309 7,831 Noncurrent Operating 11,545 13,596 Financing 7,670 3,760 Total noncurrent 19,215 17,356 Total liabilities $ 28,524 $ 25,187 (1) Operating lease right-of-use assets are recorded net of accumulated amortization of $8.7 million as of September 30, 2020. (2) Financing lease right-of-use assets are recorded net of accumulated amortization of $7.1 million as of September 30, 2020. Other information related to lease term and discount rate is as follows: September 30, December 31, 2020 2019 Weighted Average Remaining Lease Term (in years) Operating leases 4.90 5.30 Financing leases 4.99 1.18 Weighted Average Discount Rate Operating leases (1) 4.80 % 4.80 % Financing leases 4.61 % 5.10 % (1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019. The components of lease expense are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Operating lease costs: Operating lease cost $ 1,588 $ 1,715 $ 4,815 $ 5,175 Short-term lease cost (1) 833 1,305 2,914 1,460 Financing lease costs: Interest on lease liabilities 135 83 410 283 Amortization of right-of-use assets 902 579 2,487 1,733 Total lease cost $ 3,458 $ 3,682 $ 10,626 $ 8,651 (1) Includes expenses related to leases with a lease term of more than one month but less than one year. Supplemental cash flow information related to leases is as follows: Nine Months Ended September 30, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 4,743 $ 5,173 Operating cash flows for finance leases $ 410 $ 283 Financing cash flows for finance leases $ 2,751 $ 2,144 Non-cash activity: ROU assets obtained in exchange for new operating lease liabilities $ 3,017 $ 23,747 ROU assets obtained in exchange for new financing lease liabilities $ 9,714 $ 229 Maturities of lease liabilities are summarized as follows: Operating Leases Finance Leases Year ending December 31, 2020 (excluding the nine months ended September 30, 2020) $ 1,490 $ 1,136 2021 5,045 4,924 2022 3,400 1,181 2023 2,453 1,650 2024 1,818 853 Thereafter 4,215 4,083 Total future minimum lease payments 18,421 13,827 Less - amount representing interest 2,110 1,614 Present value of future minimum lease payments 16,311 12,213 Less - current lease obligations 4,766 4,543 Long-term lease obligations $ 11,545 $ 7,670

Subsequent Event

Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2020
Subsequent Event
Subsequent Event	19. Effective, October 9, 2020, the Company entered into an amendment (the "Eighth Amendment") to its syndicated credit agreement (the "Credit Agreement" , with Regions Bank, as Administrative Agent and Collateral Agent and Bank of America, N.A., BOKF, NA dba Bank of Texas, Iberiabank, NBH Bank, Truist Bank, and Trustmark National Bank, as Lenders. The Eighth Amendment provides for administrative revisions to the Credit Agreement, including changes to repayment requirements for involuntary asset dispositions and changes to the timing of repayment for voluntary asset dispositions.

Summary of Significant Accoun_2

Summary of Significant Accounting Principles (Policies)	9 Months Ended
Summary of Significant Accounting Principles (Policies)	Sep. 30, 2020
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition The Company adopted ASU 2014-09, Revenue from Contracts with Customers The Company’s revenue is derived from contracts to provide marine construction, dredging, turnkey concrete services, and other specialty services. The Company’s projects are typically short in duration and usually span a period of less than one year. The Company determines the appropriate accounting treatment for each contract before work begins and generally records revenue on contracts over time. Performance obligations are promises in a contract to transfer distinct goods or services to the customer and are the unit of account under Topic 606. The Company’s contracts and related change orders typically represent a single performance obligation because the Company provides a significant integrated service and individual goods and services are not separately identifiable. Revenue is recognized over time because control is continuously transferred to the customer. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using its best estimate of the stand-alone selling price of each distinct good or service. Progress is measured by the percentage of actual 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 costs include all direct costs, such as material and labor, and those indirect costs incurred that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Upfront costs, such as costs to mobilize personnel and equipment prior to satisfying a performance obligation are capitalized and amortized over the contract performance period. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and reported revenue and are recognized in the period in which the revisions are determined. The effect of changes in estimates of contract revenue or contract costs is recognized as an adjustment to recognized revenue on a cumulative catch-up basis. When losses on uncompleted contracts are anticipated, the entire loss is recognized in the period in which such losses are determined. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable. Contract revenue is derived from the original contract price as modified by agreed-upon change orders and estimates of variable consideration related to incentive fees and change orders or claims for which price has not yet been agreed by the customer. The Company estimates variable consideration based on its assessment of the most likely amount to which it expects to be entitled. Variable consideration is included in the estimated recognition of revenue to the extent it is probable that a significant reversal of cumulative recognized revenue will not occur. A determination that the collection of a claim is probable is based upon compliance with the terms of the contract and the extent to which the Company performed in accordance therewith but does not guarantee collection in full. Contract assets and liabilities include the following: ● Accounts Receivable: Trade, net of allowance - Represent amounts billed and currently due from customers and are stated at their estimated net realizable value. ● Accounts Receivable: Retainage - Represent amounts which have not been billed to or paid by customers due to retainage provisions in construction contracts, which amounts generally become payable upon contract completion and acceptance by the customer. ● Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts - Represent revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract (i.e. Contract Assets) and are recorded as a current asset, until such amounts are either received or written off. ● Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts - Represent billings in excess of revenues recognized (i.e. Contract Liabilities) and are recorded as a current liability, until the underlying obligation has been performed or discharged. Remaining performance obligations represent the transaction price of firm orders or other written contractual commitments from customers for which work has not been performed or is partially completed and excludes unexercised contract options and potential orders. As of September 30, 2020, the aggregate amount of the remaining performance obligations was approximately $428.8 million. Of this amount, the current expectation of the Company is that it will recognize $386.6 million, or 90%, in the next 12 months and the remaining balance thereafter.
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, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash 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 September 30, 2020 and December 31, 2019 consisted primarily of overnight bank deposits. Restricted cash of $1.0 million at December 31, 2019 consisted of collateral related to a marine project that was completed during the quarter ended June 30, 2020. The Company had no restricted cash as of September 30, 2020.
Risk Concentrations	Risk Concentrations Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of 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 is 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, net of allowances for credit losses. The Company has significant investments in billed and unbilled receivables as of September 30, 2020 and December 31, 2019. 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 contracts, which are included in costs in excess of billings, arise as revenues are recognized over time. Unbilled amounts on 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 credit losses, 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 potentially uncollectible accounts receivable against the allowance for credit losses 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 September 30, 2020, and December 31, 2019, the Company has recorded an allowance for credit losses of $0.4 million and $2.6 million, respectively. 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 September 30, 2020 totaled $36.2 million, of which $7.2 million is expected to be collected beyond September 30, 2021. Retainage at December 31, 2019 totaled $42.5 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 amounts previously recorded, which could result in the recording of a loss in the amount of the shortfall. 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 except to the extent 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 recognize any environmental liabilities as of September 30, 2020 or December 31, 2019, other than those involved in insurance reserves. See Note 16
Fair Value Measurements	Fair Value Measurements The Company evaluates and presents certain amounts included in the accompanying condensed 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 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.
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 the Company, 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 long-lead times for manufacture or fabrication but must be kept on hand to reduce downtime. Refer to Note 7
Property and Equipment	Property and Equipment Property and equipment are recorded at cost. 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 When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in results of operations for the respective period. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, 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 The Company generally uses accelerated depreciation methods for tax purposes where appropriate. Dry-docking costs are capitalized and amortized using the straight-line method over a period ranging from three Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset or asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or the fair value, less the costs to sell, and are no longer depreciated. There were no assets classified as held for sale as of September 30, 2020 or December 31, 2019.
Leases	Leases The Company adopted ASU 2016-02, Leases Note 18
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 infinite lives are not amortized but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset may be impaired. The Company has one infinite-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. See Note 9
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 Black-Scholes option-pricing model requires the use of subjective assumptions in the computation. Changes in these assumptions can cause significant fluctuations in the fair value of the option award. 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 closing price of the stock on the date 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. This assessment is updated on a periodic basis. See Note 15
Income Taxes	Income Taxes The Company determines its consolidated income tax provision using the asset and 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, Income Taxes See Note 13
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 marine segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The marine segment’s excess loss coverage responds to all key marine liability policies when a primary limit of $1 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10 million and the Watercraft Pollution Policy primary limit is $5 million. The concrete segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The concrete segment’s excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted. If a claim arises and a potential insurance recovery is probable, the impending gain is recognized separately from the related loss. The recovery will only be recognized up to the amount of the loss once the recovery of the claim is deemed probable and any excess gain will fall under contingency accounting and will only be recognized once it is realized. The Company does not net insurance recoveries against the related claim liability as the amount of the claim liability is determined without consideration of the anticipated insurance recoveries from third parties. Separately, the Company’s marine segment employee health care is not covered by primary insurance, with claims being paid out of general assets of the Company and the insurance program being currently administered by a third party. The administrator has purchased appropriate stop-loss coverage. Losses on these policies up to the deductible amounts are accrued based upon reported 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 Condensed Consolidated Statements of Operations in the period in which they become known. The Company’s concrete 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, is expected to receive a partial refund after the policy expiration. The total accrual for insurance claims liabilities was $24.5 million and $3.7 million at September 30, 2020 and December 31, 2019, respectively. The total accrual for insurance claims receivable was $23.5 million and $1.1 million at September 30, 2020 and December 31, 2019, respectively.
Recent Accounting Pronouncements	Accounting Standards Adopted in 2020 The Financial Accounting Standards Board (“FASB”) issues accounting standards and 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. In Measurement of Credit Losses on Financial Instruments

Summary of Significant Accoun_3

Summary of Significant Accounting Principles (Tables)	9 Months Ended
Summary of Significant Accounting Principles (Tables)	Sep. 30, 2020
Accounting Policies [Abstract]
Schedule of depreciable lives of property, plant 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

Revenue (Tables)

Revenue (Tables)	9 Months Ended
Revenue (Tables)	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Schedule of disaggregation of revenue	Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Marine Segment Construction $ 86,505 $ 72,609 $ 205,459 $ 163,426 Dredging 24,262 29,404 79,391 82,762 Specialty Services 2,114 5,391 5,699 11,726 Marine segment contract revenues $ 112,881 $ 107,404 $ 290,549 $ 257,914 Concrete Segment Structural $ 21,116 $ 13,439 $ 66,893 $ 37,595 Light Commercial 55,436 78,587 182,311 212,958 Other — 77 13 130 Concrete segment contract revenues $ 76,552 $ 92,103 $ 249,217 $ 250,683 Total contract revenues $ 189,433 $ 199,507 $ 539,766 $ 508,597

Concentration of Risk and Ent_2

Concentration of Risk and Enterprise Wide Disclosures (Tables)	9 Months Ended
	Sep. 30, 2020
Trade and contract retainage receivables
Concentration Risk [Line Items]
Schedules of concentration of risk, by risk factor	September 30, 2020 December 31, 2019 Federal Government $ 258 - % $ 4,765 3 % State Governments 382 - % 5,864 4 % Local Governments 22,870 18 % 41,944 26 % Private Companies 103,743 82 % 109,114 67 % Gross receivables 127,253 100 % 161,687 100 % Allowance for credit losses (411) (2,600) Net receivables $ 126,842 $ 159,087
Contract revenues
Concentration Risk [Line Items]
Schedules of concentration of risk, by risk factor	Three months ended September 30, Nine months ended September 30, 2020 % 2019 % 2020 % 2019 % Federal Government $ 16,499 9 % $ 13,564 7 % $ 32,720 6 % $ 36,142 7 % State Governments 6,322 3 % 19,872 10 % 27,646 5 % 34,213 7 % Local Government 54,316 29 % 54,654 27 % 158,176 29 % 150,683 30 % Private Companies 112,296 59 % 111,417 56 % 321,224 60 % 287,559 56 % Total contract revenues $ 189,433 100 % $ 199,507 100 % $ 539,766 100 % $ 508,597 100 %

Contracts in Progress (Tables)

Contracts in Progress (Tables)	9 Months Ended
Contracts in Progress (Tables)	Sep. 30, 2020
Contractors [Abstract]
Schedule of contracts in progress	September 30, December 31, 2020 2019 Costs incurred on uncompleted contracts $ 1,104,441 $ 884,244 Estimated earnings 200,816 144,160 1,305,257 1,028,404 Less: Billings to date (1,303,028) (1,035,796) $ 2,229 $ (7,392) Included in the accompanying Condensed Consolidated Balance Sheets under the following captions: Costs and estimated earnings in excess of billings on uncompleted contracts $ 43,196 $ 41,389 Billings in excess of costs and estimated earnings on uncompleted contracts (40,967) (48,781) $ 2,229 $ (7,392)

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
Property and Equipment (Tables)	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Summary of property and equipment	September 30, December 31, 2020 2019 Automobiles and trucks $ 2,267 $ 2,161 Building and improvements 44,324 44,278 Construction equipment 145,774 153,147 Vessels and other equipment 75,511 84,022 Office equipment 9,052 8,652 276,928 292,260 Less: Accumulated depreciation (190,748) (196,973) Net book value of depreciable assets 86,180 95,287 Construction in progress 3,868 1,198 Land 35,863 35,863 $ 125,911 $ 132,348

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
Fair Value (Tables)	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of fair value, assets and liabilities measured on recurring basis	Fair Value Measurements Carrying Value Level 1 Level 2 Level 3 September 30, 2020 Assets: Cash surrender value of life insurance policy $ 2,895 — 2,895 — Liabilities: Derivatives $ 1,795 — 1,795 — December 31, 2019 Assets: Cash surrender value of life insurance policy $ 2,714 — 2,714 — Liabilities: Derivatives $ 1,045 — 1,045 —

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
Goodwill and Intangible Assets (Tables)	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes and amortization of finite-lived intangible assets	September 30, December 31, 2020 2019 Finite-lived intangible assets, beginning of period $ 35,240 $ 35,240 Additions — — Total finite-lived intangible assets, end of period $ 35,240 $ 35,240 Accumulated amortization, beginning of period $ (29,985) $ (27,345) Current year amortization (1,552) (2,640) Total accumulated amortization (31,537) (29,985) Net finite-lived intangible assets, end of period $ 3,703 5,255 Infinite-lived intangible assets 6,892 6,892 Total net intangible assets $ 10,595 $ 12,147
Summary of finite-lived intangible assets amortization expense	2020 517 2021 1,521 2022 1,239 2023 389 2024 37 $ 3,703

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	9 Months Ended
Accrued Liabilities (Tables)	Sep. 30, 2020
Payables and Accruals [Abstract]
Schedule of accrued liabilities	September 30, 2020 December 31, 2019 Accrued salaries, wages and benefits $ 12,919 $ 7,323 Accrual for insurance claims liabilities 24,135 3,714 Sales taxes 4,774 3,021 Property taxes 1,573 389 Sale-leaseback arrangement 529 482 Accounting and audit fees 254 267 Interest — 76 Equipment purchase 921 — Other accrued expenses 820 1,694 Total accrued liabilities $ 45,925 $ 16,966

Long-term Debt, Line of Credit

Long-term Debt, Line of Credit and Derivatives (Tables)	9 Months Ended
Long-term Debt, Line of Credit and Derivatives (Tables)	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of debt	September 30, 2020 December 31, 2019 Debt Issuance Debt Issuance Principal Costs (1) Total Principal Costs (1) Total Term loan - current $ 4,500 $ (153) $ 4,347 $ 3,750 $ (82) $ 3,668 Total current debt 4,500 (153) 4,347 3,750 (82) 3,668 Revolving line of credit 10,000 (341) 9,659 36,000 (782) 35,218 Term loan - long-term 27,565 (939) 26,626 33,540 (729) 32,811 Total long-term debt 37,565 (1,280) 36,285 69,540 (1,511) 68,029 Total debt $ 42,065 $ (1,433) $ 40,632 $ 73,290 $ (1,593) $ 71,697 (1) Total debt issuance costs include underwriter fees, legal fees and syndication fees and fees related to the execution of the Fourth, Fifth, Sixth and Seventh Amendments to the Credit Agreement.
Schedule of debt maturity	2020 1,125 2021 4,500 2022 5,250 2023 21,190 $ 32,065

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	9 Months Ended
Other Long-Term Liabilities (Tables)	Sep. 30, 2020
Liabilities, Other than Long-term Debt, Noncurrent [Abstract]
Schedule of other long-term liabilities	September 30, 2020 December 31, 2019 Sale-leaseback arrangement $ 16,953 $ 17,447 Deferred compensation 2,752 2,528 Accrual for insurance claims liabilities 348 461 Total other long-term liabilities $ 20,053 $ 20,436

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Schedule of effective income tax reconciliation	Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Income tax expense (benefit) $ 303 $ 467 $ 1,660 $ 920 Effective tax rate 2.5 % 10.4 % 9.1 % (20.0) %

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
Earnings (Loss) Per Share (Tables)	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of earnings per share, basic and diluted	Three months ended September 30, Nine months ended September 30, 2020 2019 2020 2019 Basic: Weighted average shares outstanding 30,372,310 29,544,288 30,020,258 29,240,979 Diluted: Total basic weighted average shares outstanding 30,372,310 29,544,288 30,020,258 29,240,979 Effect of potentially dilutive securities: Common stock options — 2,897 — — Total weighted average shares outstanding assuming dilution 30,372,310 29,547,185 30,020,258 29,240,979

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of segment reporting	Three months ended Nine months ended September 30, September 30, 2020 2019 2020 2019 Marine Contract revenues $ 112,881 $ 107,404 $ 290,549 $ 257,914 Operating income (loss) $ 8,992 $ 4,863 $ 12,443 $ (1,584) Depreciation and amortization expense $ (4,543) $ (4,960) $ (14,063) $ (14,975) Total assets $ 258,894 $ 252,995 $ 258,894 $ 252,995 Property, plant and equipment, net $ 109,522 $ 117,071 $ 109,522 $ 117,071 Concrete Contract revenues $ 76,552 $ 92,103 $ 249,217 $ 250,683 Operating (loss) income $ 4,093 $ 1,229 $ 9,091 $ 1,076 Depreciation and amortization expense $ (2,223) $ (2,120) $ (6,599) $ (6,367) Total assets $ 123,626 $ 124,112 $ 123,626 $ 124,112 Property, plant and equipment, net $ 16,389 $ 16,985 $ 16,389 $ 16,985

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 30, 2020
Leases [Abstract]
Schedule of leases recorded on the balance sheet	September 30, December 31, Leases 2020 2019 Assets Operating lease right-of-use assets, net (1) $ 15,619 $ 17,997 Financing lease right-of-use assets, net (2) 12,775 7,896 Total assets $ 28,394 $ 25,893 Liabilities Current Operating $ 4,766 $ 5,043 Financing 4,543 2,788 Total current 9,309 7,831 Noncurrent Operating 11,545 13,596 Financing 7,670 3,760 Total noncurrent 19,215 17,356 Total liabilities $ 28,524 $ 25,187 (1) Operating lease right-of-use assets are recorded net of accumulated amortization of $8.7 million as of September 30, 2020. (2) Financing lease right-of-use assets are recorded net of accumulated amortization of $7.1 million as of September 30, 2020.
Schedule of information related to lease terms and discount rates	September 30, December 31, 2020 2019 Weighted Average Remaining Lease Term (in years) Operating leases 4.90 5.30 Financing leases 4.99 1.18 Weighted Average Discount Rate Operating leases (1) 4.80 % 4.80 % Financing leases 4.61 % 5.10 % (1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019.
Schedule of components of lease expense	Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Operating lease costs: Operating lease cost $ 1,588 $ 1,715 $ 4,815 $ 5,175 Short-term lease cost (1) 833 1,305 2,914 1,460 Financing lease costs: Interest on lease liabilities 135 83 410 283 Amortization of right-of-use assets 902 579 2,487 1,733 Total lease cost $ 3,458 $ 3,682 $ 10,626 $ 8,651 (1) Includes expenses related to leases with a lease term of more than one month but less than one year.
Schedule of supplemental cash flow information	Nine Months Ended September 30, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 4,743 $ 5,173 Operating cash flows for finance leases $ 410 $ 283 Financing cash flows for finance leases $ 2,751 $ 2,144 Non-cash activity: ROU assets obtained in exchange for new operating lease liabilities $ 3,017 $ 23,747 ROU assets obtained in exchange for new financing lease liabilities $ 9,714 $ 229
Schedule of operating lease maturities	Operating Leases Finance Leases Year ending December 31, 2020 (excluding the nine months ended September 30, 2020) $ 1,490 $ 1,136 2021 5,045 4,924 2022 3,400 1,181 2023 2,453 1,650 2024 1,818 853 Thereafter 4,215 4,083 Total future minimum lease payments 18,421 13,827 Less - amount representing interest 2,110 1,614 Present value of future minimum lease payments 16,311 12,213 Less - current lease obligations 4,766 4,543 Long-term lease obligations $ 11,545 $ 7,670
Schedule of finance lease maturities	Operating Leases Finance Leases Year ending December 31, 2020 (excluding the nine months ended September 30, 2020) $ 1,490 $ 1,136 2021 5,045 4,924 2022 3,400 1,181 2023 2,453 1,650 2024 1,818 853 Thereafter 4,215 4,083 Total future minimum lease payments 18,421 13,827 Less - amount representing interest 2,110 1,614 Present value of future minimum lease payments 16,311 12,213 Less - current lease obligations 4,766 4,543 Long-term lease obligations $ 11,545 $ 7,670

Description of Business and B_2

Description of Business and Basis of Presentation (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020segment	Sep. 30, 2019segment	Mar. 31, 2019USD ($)	Sep. 30, 2020segment	Sep. 30, 2019segment
Number of operating segments				2	2
Number of reportable segments	2	2		2	2
Selling, General and Administrative Expenses
Project management costs \| $			$ 1.1

Summary of Significant Accoun_4

Summary of Significant Accounting Principles - Remaining Performance Obligation (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied	$ 428.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied	$ 386.6
Performance obligations expected to be satisfied, percentage	90.00%
Performance obligations expected to be satisfied, expected timing	12 months

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Restricted Cash and Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Restricted cash
Restricted cash	$ 0	$ 958
Accounts Receivable [Abstract]
Allowance for credit losses	400	2,600
Retainage	36,230	$ 42,547
Retainage, long-term	$ 7,200

Summary of Significant Accoun_6

Summary of Significant Accounting Principles - Property and Equipment (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment
Assets classified as held-for-sale	$ 0	$ 0
Equipment improvement \| Minimum
Property, Plant and Equipment
Property and equipment useful life	3 years
Equipment improvement \| Maximum
Property, Plant and Equipment
Property and equipment useful life	7 years
Automobiles and trucks \| Minimum
Property, Plant and Equipment
Property and equipment useful life	3 years
Automobiles and trucks \| Maximum
Property, Plant and Equipment
Property and equipment useful life	5 years
Building and improvements \| Minimum
Property, Plant and Equipment
Property and equipment useful life	5 years
Building and improvements \| Maximum
Property, Plant and Equipment
Property and equipment useful life	30 years
Construction equipment \| Minimum
Property, Plant and Equipment
Property and equipment useful life	3 years
Construction equipment \| Maximum
Property, Plant and Equipment
Property and equipment useful life	15 years
Vessels and other equipment \| Minimum
Property, Plant and Equipment
Property and equipment useful life	1 year
Vessels and other equipment \| Maximum
Property, Plant and Equipment
Property and equipment useful life	15 years
Office equipment \| Minimum
Property, Plant and Equipment
Property and equipment useful life	1 year
Office equipment \| Maximum
Property, Plant and Equipment
Property and equipment useful life	5 years
Dry-docking capitalized costs \| Minimum
Property, Plant and Equipment
Property and equipment useful life	3 years
Dry-docking capitalized costs \| Maximum
Property, Plant and Equipment
Property and equipment useful life	15 years

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Leases and Intangible Assets (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)Asset	Dec. 31, 2019USD ($)	Jan. 01, 2019USD ($)
Operating lease assets and liabilities
Operating lease, right-of-use assets	$ 15,619	$ 17,997
Operating lease, liability	$ 16,311
Infinite-lived intangible assets
Number of infinite-lived intangible assets \| Asset	1
Accounting Standards Update 2016-02 \| Restatement Adjustment
Operating lease assets and liabilities
Operating lease, right-of-use assets			$ 23,300
Operating lease, liability			$ 24,000

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Insurance Coverage (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)itempolicy	Dec. 31, 2019USD ($)
Insurance Coverage
Accrued insurance claims liability	$ 24.5	$ 3.7
Accrued insurance claims receivables	23.5	$ 1.1
Maritime employer's liability
Insurance Coverage
Primary limit of insurance coverage	10
Watercraft pollution policy
Insurance Coverage
Primary limit of insurance coverage	$ 5
Heavy Civil Marine Construction Segment
Insurance Coverage
Levels of insurance coverage maintained by the Company \| item	5
Amount in excess of primary insurance coverage	$ 200
Primary limit of insurance coverage	$ 1
Commercial Concrete Segment
Insurance Coverage
Levels of insurance coverage maintained by the Company \| item	5
Amount in excess of primary insurance coverage	$ 200
Primary limit of insurance coverage	$ 1
Number of employee health care insurance policies \| policy	2

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Accounting Standards Adopted (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020USD ($)
Provision for Doubtful Accounts	$ (487)
COVID-19 Pandemic
Provision for Doubtful Accounts	$ 400

Revenue (Details)

Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
Revenue (Details) $ in Thousands	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)segment	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)segment
Disaggregation of Revenue [Line Items]
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Number of reportable segments \| segment	2	2	2	2
Heavy Civil Marine Construction Segment
Disaggregation of Revenue [Line Items]
Contract revenues	$ 112,881	$ 107,404	$ 290,549	$ 257,914
Heavy Civil Marine Construction Segment \| Construction
Disaggregation of Revenue [Line Items]
Contract revenues	86,505	72,609	205,459	163,426
Heavy Civil Marine Construction Segment \| Dredging
Disaggregation of Revenue [Line Items]
Contract revenues	24,262	29,404	79,391	82,762
Heavy Civil Marine Construction Segment \| Specialty Services
Disaggregation of Revenue [Line Items]
Contract revenues	2,114	5,391	5,699	11,726
Commercial Concrete Segment
Disaggregation of Revenue [Line Items]
Contract revenues	76,552	92,103	249,217	250,683
Commercial Concrete Segment \| Structural
Disaggregation of Revenue [Line Items]
Contract revenues	21,116	13,439	66,893	37,595
Commercial Concrete Segment \| Light Commercial
Disaggregation of Revenue [Line Items]
Contract revenues	$ 55,436	78,587	182,311	212,958
Commercial Concrete Segment \| Other
Disaggregation of Revenue [Line Items]
Contract revenues		$ 77	$ 13	$ 130

Concentration of Risk and Ent_3

Concentration of Risk and Enterprise Wide Disclosures (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)customer	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)customer	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Concentration Risk [Line Items]
Allowance for credit losses	$ (411)		$ (411)		$ (2,600)
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Foreign
Concentration Risk [Line Items]
Contract revenues, percent	0.90%	2.30%	1.80%	1.50%
Customer concentration risk \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 127,253		$ 127,253		161,687
Allowance for credit losses	(411)		(411)		(2,600)
Trade and retainage receivables	126,842		$ 126,842		$ 159,087
Concentration risk, percentage			100.00%		100.00%
Customer concentration risk \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Contract revenues, percent	100.00%	100.00%	100.00%	100.00%
Customer concentration risk \| Federal Government \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 258		$ 258		$ 4,765
Concentration risk, percentage					3.00%
Customer concentration risk \| Federal Government \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 16,499	$ 13,564	$ 32,720	$ 36,142
Contract revenues, percent	9.00%	7.00%	6.00%	7.00%
Customer concentration risk \| State Governments \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 382		$ 382		$ 5,864
Concentration risk, percentage					4.00%
Customer concentration risk \| State Governments \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 6,322	$ 19,872	$ 27,646	$ 34,213
Contract revenues, percent	3.00%	10.00%	5.00%	7.00%
Customer concentration risk \| Local Governments \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 22,870		$ 22,870		$ 41,944
Concentration risk, percentage			18.00%		26.00%
Customer concentration risk \| Local Governments \| Contract revenues
Concentration Risk [Line Items]
Number of customers exceeding the 10% benchmark percentage \| customer	1		1
Contract revenues	$ 54,316	$ 54,654	$ 158,176	$ 150,683
Contract revenues, percent	29.00%	27.00%	29.00%	30.00%
Customer concentration risk \| Local Governments \| Contract revenues \| Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	13.80%		11.20%
Customer concentration risk \| Private Companies \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 103,743		$ 103,743		$ 109,114
Concentration risk, percentage			82.00%		67.00%
Customer concentration risk \| Private Companies \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 112,296	$ 111,417	$ 321,224	$ 287,559
Contract revenues, percent	59.00%	56.00%	60.00%	56.00%

Contracts in Progress (Details)

Contracts in Progress (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Contractors [Abstract]
Costs incurred on uncompleted contracts	$ 1,104,441	$ 884,244
Estimated earnings	200,816	144,160
Costs incurred and estimated earnings on uncompleted contracts	1,305,257	1,028,404
Less: Billings to date	(1,303,028)	(1,035,796)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	2,229	(7,392)
Costs and estimated earnings in excess of billings on uncompleted contracts	43,196	41,389
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (40,967)	$ (48,781)

Contracts in Progress - Additio

Contracts in Progress - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Costs in Excess of Billings, Current	$ 43,196	$ 41,389
Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts
Disaggregation of Revenue [Line Items]
Costs in Excess of Billings, Current	$ 3,200	$ 100

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment
Property, plant and equipment, gross	$ 276,928	$ 292,260
Less: accumulated depreciation	(190,748)	(196,973)
Property, plant and equipment net book value of depreciable assets	86,180	95,287
Property and equipment, net of depreciation	125,911	132,348
Automobiles and trucks
Property, Plant and Equipment
Property, plant and equipment, gross	2,267	2,161
Building and improvements
Property, Plant and Equipment
Property, plant and equipment, gross	44,324	44,278
Construction equipment
Property, Plant and Equipment
Property, plant and equipment, gross	145,774	153,147
Vessels and other equipment
Property, Plant and Equipment
Property, plant and equipment, gross	75,511	84,022
Office equipment
Property, Plant and Equipment
Property, plant and equipment, gross	9,052	8,652
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, gross	3,868	1,198
Land
Property, Plant and Equipment
Property, plant and equipment, gross	$ 35,863	$ 35,863

Property and Equipment Narrativ

Property and Equipment Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 5.3	$ 5.8	$ 16.6	$ 17.6

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory	$ 1,936	$ 1,114
Inventory, non-current	$ 6,506	$ 7,037

Fair Value - Schedule of Fair V

Fair Value - Schedule of Fair Value Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	$ 1,800
Fair Value, Measurements, Recurring \| Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	2,895	$ 2,714
Derivatives	1,795	1,045
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| 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
Derivatives	0	0
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance	2,895	2,714
Derivatives	1,795	1,045
Fair Value, Measurements, Recurring \| Estimate of Fair Value Measurement \| 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
Derivatives	$ 0	$ 0

Fair Value - Other Fair Value M

Fair Value - Other Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Commercial Concrete Segment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life Insurance, face amount	$ 11.1
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 42.1	$ 73.3

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1			$ 35,240	$ 35,240	$ 35,240
Additions			0
Total intangible assets, end of year	$ 35,240		35,240		35,240
Accumulated Amortization [Roll Forward]
Accumulated amortization, January 1			(29,985)	(27,345)	(27,345)
Current year amortization	(519)	$ (662)	(1,552)	$ (1,980)	(2,640)
Total accumulated amortization	(31,537)		(31,537)		(29,985)
Net intangible assets
Net intangible assets, end of year	3,703		3,703		5,255
Infinite-lived intangible assets	6,892		6,892		6,892
Total net intangible assets	$ 10,595		$ 10,595		$ 12,147

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
Goodwill and Intangible Assets - Narrative (Details)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Asset	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Amortization expense	$ 519,000	$ 662,000	$ 1,552,000	$ 1,980,000	$ 2,640,000
Net intangible assets, end of year	$ 3,703,000		$ 3,703,000		$ 5,255,000
Number of infinite-lived intangible assets \| Asset			1
Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangibles acquired						$ 18,800,000
Acquired finite-lived intangible assets, useful life			8 years
Trade Names
Business Acquisition [Line Items]
Goodwill impairment charges			$ 0

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Future Amortization Expense of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2020	$ 517
2021	1,521
2022	1,239
2023	389
2024	37
Net intangible assets, end of year	$ 3,703	$ 5,255

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 12,919	$ 7,323
Accrual for insurance claims liabilities	24,135	3,714
Sales taxes	4,774	3,021
Property taxes	1,573	389
Sale-leaseback arrangement	529	482
Accounting and audit fees	254	267
Interest		76
Equipment purchase	921
Other accrued expenses	820	1,694
Total accrued liabilities	$ 45,925	$ 16,966

Long-term Debt, Line of Credi_2

Long-term Debt, Line of Credit and Derivatives - Obligations under Debt Arrangements (Details) - USD ($) $ in Thousands	1 Months Ended				9 Months Ended
	Jun. 30, 2020	May 31, 2019	Mar. 31, 2019	Jul. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Jun. 08, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Amortization of debt issuance costs					$ 529	$ 312
Principal current					4,500			$ 3,750
Principal, long-term					37,565			69,540
Principal					42,065			73,290
Deferred Issuance Costs, current					(153)			(82)
Deferred Issuance Costs, long-term					(1,280)			(1,511)
Debt Issuance Costs, Net, Total					(1,433)			(1,593)
Net Value, current					4,347			3,668
Net Value, long-term					36,285			68,029
Total debt					$ 40,632			71,697
Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate					2.58%
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 50,000
Debt issuance expense		$ 400
Principal, long-term					10,000			36,000
Deferred Issuance Costs, long-term					(341)			(782)
Net Value, long-term					9,659			35,218
Term Loan \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					60,000
Principal current					4,500			3,750
Principal, long-term					27,565			33,540
Principal					32,065
Deferred Issuance Costs, current					(153)			(82)
Deferred Issuance Costs, long-term					(939)			(729)
Net Value, current					4,347			3,668
Net Value, long-term					26,626			$ 32,811
364-Day Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							$ 20,000
Debt issuance expense	$ 400
Fourth, Fifth And Sixth Amendments To Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Debt Issuance Costs, Net, Total					$ (900)
Fourth Amendment to Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Debt issuance cost				$ 900
Fifth Amendment To Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Debt issuance cost			$ 600
Sixth Amendment To Credit Agreement \| Line of Credit
Debt Instrument [Line Items]
Debt issuance cost		$ 900

Long-term Debt, Line of Credi_3

Long-term Debt, Line of Credit and Derivatives - Provisions of Revolving Line of Credit (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Debt Instrument [Line Items]
Repayments of Debt	$ 41,225,000	$ 59,460,000
Proceeds from lines of credit	$ 10,000,000	$ 49,000,000
Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	2.58%
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 50,000,000
Minimum borrowing increment amount	1,000,000
Increment borrowing multiple for amounts borrowed in excess of minimum borrowing amount	250,000
Amount outstanding	10,000,000
Remaining borrowing capacity	37,900,000
Repayments of Debt	36,000,000
Decrease in debt balance	26,000,000
Proceeds from lines of credit	10,000,000
Revolving Credit Facility \| Line of Credit \| LIBOR
Debt Instrument [Line Items]
Amount outstanding	$ 5,000,000
Weighted average interest rate	2.44%
Revolving Credit Facility \| Line of Credit \| Base Rate
Debt Instrument [Line Items]
Amount outstanding	$ 5,000,000
Weighted average interest rate	4.50%
Letter of Credit \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 20,000,000
Letters of credit outstanding	2,100,000
Bridge Loan \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	5,000,000
Minimum borrowing increment amount	250,000
Increment borrowing multiple for amounts borrowed in excess of minimum borrowing amount	$ 50,000

Long-term Debt, Line of Credi_4

Long-term Debt, Line of Credit and Derivatives - Provisions of 364-Day Revolving Credit Facility (Details) - 364-Day Revolving Credit Facility - Line of Credit - USD ($)	Jun. 08, 2020	Jun. 30, 2020
Debt Instrument [Line Items]
Credit facility term	364 days
Line of credit facility, maximum borrowing capacity	$ 20,000,000
Minimum borrowing increment amount	1,000,000
Increment borrowing multiple for amounts borrowed in excess of minimum borrowing amount	$ 250,000
Amount outstanding		$ 0

Long-term Debt, Line of Credi_5

Long-term Debt, Line of Credit and Derivatives - Provisions of Term Loan (Details) - USD ($) $ in Thousands	Sep. 27, 2019	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Outstanding principal balance		$ 42,065	$ 73,290
Additional principal paydown	$ 18,200
Term Loan \| Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		60,000
Outstanding principal balance		32,065
Current portion of debt		4,500
Quarterly principal payments		2,600
Additional principal paydown		2,600
Non-current portion of debt		$ 27,600
Term Loan \| Line of Credit \| LIBOR
Debt Instrument [Line Items]
Effective interest rate		2.44%

Long-term Debt, Line of Credi_6

Long-term Debt, Line of Credit and Derivatives - Debt Maturity Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Principal	$ 42,065	$ 73,290
Term Loan \| Line of Credit
Debt Instrument [Line Items]
2020	1,125
2021	4,500
2022	5,250
2023	21,190
Principal	$ 32,065

Long-term Debt, Line of Credi_7

Long-term Debt, Line of Credit and Derivatives - Financial covenants (Details)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Covenant compliance, Fixed Charge Coverage Ratio, minimum	1.25
Covenant compliance, Leverage Ratio, maximum	3

Long-term Debt, Line of Credi_8

Long-term Debt, Line of Credit and Derivatives - Derivative Financial Instruments (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Jul. 31, 2020USD ($)	Sep. 16, 2015USD ($)contract
Debt Instrument [Line Items]
Percent Of aggregate principal amount hedged				50.00%
Change in fair market value of interest rate swaps	$ 0.8	$ 1.2
Fair market value of interest rate swap liability	$ 1.8
Series of Swaps
Debt Instrument [Line Items]
Derivative, notional amount				$ 67.5
Derivative, number of instruments held \| contract				5
Sixth Swap
Debt Instrument [Line Items]
Derivative, notional amount			$ 27

Other Long-Term Liabilities - C

Other Long-Term Liabilities - Components (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other long-term liabilities
Sale-leaseback arrangement	$ 16,953	$ 17,447
Deferred compensation	2,752	2,528
Accrual for insurance claims liabilities	348	461
Total other long-term liabilities	$ 20,053	$ 20,436

Other Long-Term Liabilities - S

Other Long-Term Liabilities - Sale-Leaseback (Details) $ in Millions	Sep. 27, 2019USD ($)Options
Failed Sale Leaseback
Paydown of Term loan	$ 18.2
Failed Sale Leaseback
Failed Sale Leaseback
Sale price of properties sold	$ 19.1
Lease term	15 years
Annual rent	$ 1.5
Annual percentage rent increase	2.00%
Number of consecutive options to extend term \| Options	2
Term of available options	10 years

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Expense (Benefit) Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal statutory tax rate	21.00%		21.00%
Income tax expense (benefit)	$ 303	$ 467	$ 1,660	$ 920
Consolidated effective tax rate	2.50%	10.40%	9.10%	(20.00%)

Earnings (Loss) Per Share - Ant

Earnings (Loss) Per Share - Anti-dilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Potential antidilutive securities excluded from computations of earnings per share	1,086,882	1,614,192	1,220,314	1,671,040

Earnings (Loss) Per Share - Bas

Earnings (Loss) Per Share - Basic and Diluted (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic:
Weighted average shares outstanding, basic	30,372,310	29,544,288	30,020,258	29,240,979
Effect of dilutive securities:
Common stock options	0	2,897	0	0
Total weighted average shares outstanding assuming dilution	30,372,310	29,547,185	30,020,258	29,240,979

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended						3 Months Ended		9 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Jun. 30, 2020	May 31, 2020	Mar. 31, 2020	Feb. 29, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	May 31, 2017
Share-based Compensation
Approved and authorized maximum number of shares to be issued											2,400,000
Compensation expense related to stock based awards outstanding							$ 300	$ 600	$ 1,900	$ 2,300
Proceeds received upon exercise of stock options										$ 35
Total share-based compensation cost not yet recognized	$ 2,400						2,400		$ 2,400
Share-based compensation cost not yet recognized, period for recognition									2 years
Independent Directors and Certain Officers and Executives
Share-based Compensation
Expense related to purchase of vested stock-based awards							$ 200		$ 200
Stock options
Share-based Compensation
Expiration period									10 years
Forfeiture rate applied to awards									5.50%
Exercise of stock options, shares							0	0	0	7,021
Stock options \| Minimum
Share-based Compensation
Vesting period									3 years
Stock options \| Maximum
Share-based Compensation
Vesting period									5 years
Total intrinsic value of options exercised										$ 100
Restricted stock
Share-based Compensation
Forfeiture rate applied to awards									3.20%
Restricted stock \| Independent Directors and Certain Officers and Executives
Share-based Compensation
Awards granted in period (in shares)				638,938
Grant date fair value (in dollars per share)				$ 2.26
Restricted stock \| Independent Directors
Share-based Compensation
Awards granted in period (in shares)				238,938
Restricted stock \| Officers And Executives
Share-based Compensation
Vesting period					3 years
Granted (in shares)					170,235
Granted (in dollars per share)					$ 3.73
Restricted stock \| Certain Executives
Share-based Compensation
Vesting period	3 years
Awards granted in period (in shares)						15,121
Grant date fair value (in dollars per share)	$ 2.58					$ 4.96
Granted (in shares)	25,000
Performance Shares \| Certain Executives
Share-based Compensation
Shares earned based on achievement of objective, percent				100.00%
Awards granted in period (in shares)				300,000
Grant date fair value (in dollars per share)		$ 1.96
Performance period			1 year	1 year
Granted (in shares)		93,750
Performance Shares \| Vesting If Performance Target Is Met or Determination \| Certain Executives
Share-based Compensation
Vesting percentage		50.00%		50.00%
Performance Shares \| Vesting On Second And Third Anniversary Of Grant \| Certain Executives
Share-based Compensation
Vesting percentage				25.00%
Performance Shares \| Vesting on First and Second Anniversary of Determination \| Certain Executives
Share-based Compensation
Vesting percentage		25.00%

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) $ in Millions	Aug. 21, 2020itemgal	Sep. 30, 2020USD ($)lawsuit	Mar. 31, 2018USD ($)
Other Commitments [Line Items]
Recovery of reserved accounts receivable		$ 0.9
Settled Litigation
Other Commitments [Line Items]
Legal settlement			$ 5.5
Notes receivable, current		0.8
Notes receivables, noncurrent		2
Receivable, unamortized discount		$ 0.2
Waymon L Boyd Dredge Fire
Other Commitments [Line Items]
Number of crew deaths \| item	4
Number of gallons of oil, diesel fuel, and contaminated water discharged \| gal	18,000
Waymon L Boyd Dredge Fire \| Pending Litigation
Other Commitments [Line Items]
Number of lawsuits filed \| lawsuit		7

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details) $ in Thousands	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)segment	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)segment	Dec. 31, 2019USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	2	2	2	2
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Operating income (loss)	13,085	6,092	21,534	(508)
Depreciation and amortization			(18,175)	(19,609)
Assets	382,520		382,520		$ 394,844
Property and equipment, net of depreciation	125,911		125,911		$ 132,348
Heavy Civil Marine Construction Segment
Segment Reporting Information [Line Items]
Contract revenues	112,881	107,404	290,549	257,914
Heavy Civil Marine Construction Segment \| Mexico and the Caribbean
Segment Reporting Information [Line Items]
Contract revenues	1,800	4,600	9,700	7,500
Commercial Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	76,552	92,103	249,217	250,683
Commercial Concrete Segment \| Foreign
Segment Reporting Information [Line Items]
Contract revenues	0	0	0	0
Operating Segments \| Heavy Civil Marine Construction Segment
Segment Reporting Information [Line Items]
Contract revenues	112,881	107,404	290,549	257,914
Operating income (loss)	8,992	4,863	12,443	(1,584)
Depreciation and amortization	(4,543)	(4,960)	(14,063)	(14,975)
Assets	258,894	252,995	258,894	252,995
Property and equipment, net of depreciation	109,522	117,071	109,522	117,071
Operating Segments \| Commercial Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	76,552	92,103	249,217	250,683
Operating income (loss)	4,093	1,229	9,091	1,076
Depreciation and amortization	(2,223)	(2,120)	(6,599)	(6,367)
Assets	123,626	124,112	123,626	124,112
Property and equipment, net of depreciation	16,389	16,985	16,389	16,985
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues		$ 300	$ 2,700	$ 500
Intersegment Eliminations \| Maximum
Segment Reporting Information [Line Items]
Contract revenues	$ 100

Leases - Assets and Liabilities

Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets, net of amortization	$ 15,619	$ 17,997
Financing lease right-of-use assets, net of amortization	12,775	7,896
Total assets	28,394	25,893
Current portion of operating lease liabilities	4,766	5,043
Current portion of financing lease liabilities	4,543	2,788
Total current	9,309	7,831
Operating lease liabilities	11,545	13,596
Financing lease liabilities	7,670	3,760
Total noncurrent	19,215	17,356
Total liabilities	28,524	$ 25,187
Operating lease, right-of-use asset, accumulated amortization	8,700
Finance lease, right-of-use asset, accumulated amortization	$ 7,100

Leases - Term and Discount Rate

Leases - Term and Discount Rate (Details)	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted Average Remaining Lease Term, operating lease	4 years 10 months 24 days	5 years 3 months 18 days
Weighted Average Remaining Lease Term, finance lease	4 years 11 months 26 days	1 year 2 months 4 days
Weighted Average Discount Rate, operating lease	4.80%	4.80%
Weighted Average Discount Rate, finance lease	4.61%	5.10%

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 1,588	$ 1,715	$ 4,815	$ 5,175
Short-term lease cost	833	1,305	2,914	1,460
Interest on lease liabilities	135	83	410	283
Amortization of right-of-use assets	902	579	2,487	1,733
Total lease cost	$ 3,458	$ 3,682	$ 10,626	$ 8,651

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating cash flows for operating leases	$ 4,743	$ 5,173
Operating cash flows for finance leases	410	283
Financing cash flows for finance leases	2,751	2,144
ROU assets obtained in exchange for new operating lease liabilities	3,017	23,747
ROU assets obtained in exchange for new financing lease liabilities	$ 9,714	$ 229

Leases - Maturities (Details)

Leases - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating Leases
2020 (Excluding the nine months ended September 30, 2020)	$ 1,490
2021	5,045
2022	3,400
2023	2,453
2024	1,818
Thereafter	4,215
Total future minimum lease payments	18,421
Less - amount representing interest	2,110
Operating Lease, Liability, Total	16,311
Less - current lease obligations	4,766	$ 5,043
Long-term lease obligations	11,545	13,596
Finance Leases
2020 (excluding the nine months ended September 30, 2020)	1,136
2021	4,924
2022	1,181
2023	1,650
2024	853
Thereafter	4,083
Total future minimum lease payments	13,827
Less - amount representing interest	1,614
Present value of future minimum lease payments	12,213
Less - current lease obligations	4,543	2,788
Long-term lease obligations	$ 7,670	$ 3,760