Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended March 31,
	2022		2021
Marine Segment
Construction	$	59,152	$	43,936
Dredging		22,166		24,682
Specialty Services		3,162		3,528
Marine segment contract revenues	$	84,480	$	72,146
Concrete Segment
Structural	$	13,676	$	16,661
Light Commercial		76,775		64,495
Other		—		7
Concrete segment contract revenues	$	90,451	$	81,163
Total contract revenues	$	174,931	$	153,309