Revenue (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Summary of Contract Revenues by Type of Work and Customer

The Company’s contract revenues by type of work, for the periods indicated, were as follows:

	Three Months Ended
	March 31,
Revenues	2020		2019
Dredging:
Capital—U.S.	$	83,549	$	92,744
Capital—foreign		6,862		8,329
Coastal protection		79,850		33,743
Maintenance		42,385		29,649
Rivers & lakes		5,049		28,172
Total revenues	$	217,695	$	192,637

The Company’s contract revenues by type of customer, for the periods indicated, were as follows:

	Three Months Ended
	March 31,
Revenues	2020		2019
Dredging:
Federal government	$	165,767	$	170,155
State and local government		42,332		14,103
Private		2,734		50
Foreign		6,862		8,329
Total revenues	$	217,695	$	192,637

Schedule of Accounts Receivable

Accounts receivable at March 31, 2020 and December 31, 2019 are as follows:

	March 31,			December 31,
	2020			2019
Completed contracts	$	9,016		$	3,444
Contracts in progress		28,453			9,490
Retainage		7,109			7,415
		44,578			20,349
Allowance for doubtful accounts		(564	)		(564	)
Total accounts receivable—net	$	44,014		$	19,785

Components of Contracts in Progress

The components of contracts in progress at March 31, 2020 and December 31, 2019 are as follows:

	March 31,			December 31,
	2020			2019
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress	$	327,616		$	104,620
Amounts billed		(300,389	)		(86,074	)
Costs and earnings in excess of billings for contracts in progress		27,227			18,546
Costs and earnings in excess of billings for completed contracts		11,965			6,126
Total contract revenues in excess of billings	$	39,192		$	24,672
Current portion of contract revenues in excess of billings	$	37,080		$	22,560
Long-term contract revenues in excess of billings		2,112			2,112
Total contract revenues in excess of billings	$	39,192		$	24,672
Billings in excess of costs and earnings:
Amounts billed	$	(455,842	)	$	(628,491	)
Costs and earnings for contracts in progress		394,515			573,225
Total billings in excess of contract revenues	$	(61,327	)	$	(55,266	)