Revenue (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended September 30,				Nine months ended September 30,
	2023		2022		2023		2022
Marine Segment
Construction	$	58,162	$	56,765	$	189,895	$	169,127
Dredging		9,444		17,408		44,993		63,894
Specialty Services		13,307		1,925		25,866		9,876
Marine segment contract revenues	$	80,913	$	76,098	$	260,754	$	242,897
Concrete Segment
Structural	$	12,268	$	15,070	$	41,849	$	46,610
Light Commercial		75,295		91,453		207,581		262,620
Concrete segment contract revenues	$	87,563	$	106,523	$	249,430	$	309,230
Total contract revenues	$	168,476	$	182,621	$	510,184	$	552,127