Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Year ended December 31,
	2023		2022		2021
Marine Segment
Construction	$	297,462	$	239,656	$	169,554
Dredging		60,667		85,414		80,831
Specialty Services		37,788		14,143		13,530
Marine segment contract revenues	$	395,917	$	339,213	$	263,915
Concrete Segment
Structural	$	53,827	$	57,425	$	58,420
Light Commercial		262,034		351,684		279,018
Other		—		—		7
Concrete segment contract revenues	$	315,861	$	409,109	$	337,445
Total contract revenues	$	711,778	$	748,322	$	601,360