Revenue (Tables)

12 Months Ended

Dec. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Year ended December 31,
	2024		2023		2022
Marine Segment
Construction	$	448,321	$	297,462	$	239,656
Dredging		57,048		60,667		85,414
Specialty Services		15,881		37,788		14,143
Marine segment contract revenues	$	521,250	$	395,917	$	339,213
Concrete Segment
Structural	$	61,545	$	53,827	$	57,425
Light Commercial		213,599		262,034		351,684
Concrete segment contract revenues	$	275,144	$	315,861	$	409,109
Total contract revenues	$	796,394	$	711,778	$	748,322