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Revenue (Tables)

3 Months Ended

Mar. 31, 2025

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, are as follows:

		Three Months Ended
		March 31,
Revenues		2025				2024
Dredging:
Capital—U.S.		$	91,120			$	69,900
Coastal protection			120,302				63,926
Maintenance			31,443				64,834
Total revenues		$	242,865			$	198,660

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

		Three Months Ended
		March 31,
Revenues		2025				2024
Dredging:
Federal government		$	134,408			$	134,789
State and local government			36,394				47,700
Private			72,063				16,171
Total revenues		$	242,865			$	198,660

Schedule of Accounts Receivable

Accounts receivable at March 31, 2025 and December 31, 2024 are as follows:

		2025				2024
Completed contracts		$	8,328			$	660
Contracts in progress			96,511				105,159
Retainage			8,827				12,575
			113,666				118,394
Allowance for credit losses			(364	)			(364	)
Total accounts receivable—net		$	113,302			$	118,030

Components of Contracts in Progress

The components of contracts in progress at March 31, 2025 and December 31, 2024 are as follows:

		March 31,				December 31,
		2025				2024
Costs and earnings in excess of billings:
Costs and earnings for contracts in progress		$	203,252			$	206,933
Amounts billed			(141,491	)			(153,208	)
Costs and earnings in excess of billings for contracts in progress			61,761				53,725
Costs and earnings in excess of billings for completed contracts			17,203				20,472
Total contract revenues in excess of billings		$	78,964			$	74,197
Current portion of contract revenues in excess of billings		$	78,964			$	74,197
Billings in excess of costs and earnings:
Amounts billed		$	(450,700	)		$	(303,810	)
Costs and earnings for contracts in progress			420,331				278,014
Total billings in excess of contract revenues		$	(30,369	)		$	(25,796	)

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- Definition

Tabular disclosure of long-term contract or program.

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
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-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-Publisher FASB
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