Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Year ended December 31,
	2022		2021		2020
Marine Segment
Construction	$	239,656	$	169,554	$	272,870
Dredging		85,414		80,831		106,647
Specialty Services		14,143		13,530		8,656
Marine segment contract revenues	$	339,213	$	263,915	$	388,173
Concrete Segment
Structural	$	57,425	$	58,420	$	85,904
Light Commercial		351,684		279,018		235,835
Other		—		7		30
Concrete segment contract revenues	$	409,109	$	337,445	$	321,769
Total contract revenues	$	748,322	$	601,360	$	709,942