Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Summary of Type of Work and Customer, Contract Revenues

The following table sets forth, by type of work, the Company’s contract revenues for the years ended December 31, 2021, 2020 and 2019:

Revenues	2021		2020		2019
Capital—U.S.	$	397,034	$	336,163	$	299,706
Capital—foreign		6,596		25,892		48,619
Coastal protection		169,678		201,361		182,369
Maintenance		132,551		148,767		104,753
Rivers & lakes		20,290		21,418		76,071
Total revenues	$	726,149	$	733,601	$	711,518

The following table sets forth, by type of customer, the Company’s contract revenues for the years ended December 31, 2021, 2020 and 2019:

Revenues	2021		2020		2019
Federal government	$	568,980	$	582,949	$	581,157
State and local government		118,712		85,737		71,398
Private		31,861		39,023		10,344
Foreign		6,596		25,892		48,619
Total revenues	$	726,149	$	733,601	$	711,518

Schedule of Accounts Receivable

Accounts receivable at December 31, 2021 and December 31, 2020 are as follows:

		2021			2020
Completed contracts	$	10,612		$	12,347
Contracts in progress		65,415			21,239
Retainage		7,490			5,968
		83,517			39,554
Allowance for doubtful accounts		(564	)		(564	)
Total accounts receivable—net	$	82,953		$	38,990

Components of Contracts in Progress

The components of contracts in progress at December 31, 2021 and December 31, 2020 are as follows:

		2021			2020
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	270,998		$	199,964
Amounts billed		(240,941	)		(168,569	)
Costs and earnings in excess of billings for contracts in progress		30,057			31,395
Costs and earnings in excess of billings for completed contracts		10,894			2,823
Total contract revenues in excess of billings	$	40,951		$	34,218
Current portion of contract revenues in excess of billings	$	39,844		$	32,106
Long-term contract revenues in excess of billings		1,107			2,112
Total contract revenues in excess of billings	$	40,951		$	34,218
Billings in excess of costs and earnings:
Amounts billed	$	(224,381	)	$	(550,468	)
Costs and earnings for contracts in progress		209,567			517,860
Total billings in excess of contract revenues	$	(14,814	)	$	(32,608	)

Summary of Revenues and Gross Profit from Foreign Project Operations

The Company derived revenues and gross profit (loss) from foreign project operations for the years ended December 31, 2021, 2020, and 2019, as follows:

	2021			2020			2019
Contract revenues	$	6,596		$	25,892		$	48,619
Costs of contract revenues		(9,281	)		(34,529	)		(66,347	)
Gross profit (loss)	$	(2,685	)	$	(8,637	)	$	(17,728	)