Revenue (Tables)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended September 30,				Nine months ended September 30,
	2022		2021		2022		2021
Marine Segment
Construction	$	56,765	$	38,883	$	169,127	$	121,678
Dredging		17,408		13,157		63,894		58,511
Specialty Services		1,925		2,699		9,876		10,638
Marine segment contract revenues	$	76,098	$	54,739	$	242,897	$	190,827
Concrete Segment
Structural	$	15,070	$	13,090	$	46,610	$	47,296
Light Commercial		91,453		72,078		262,620		200,961
Other		—		—		—		7
Concrete segment contract revenues	$	106,523	$	85,168	$	309,230	$	248,264
Total contract revenues	$	182,621	$	139,907	$	552,127	$	439,091