Revenue (Tables)

3 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended March 31,
	2023		2022
Marine Segment
Construction	$	54,012	$	59,152
Dredging		20,730		22,166
Specialty Services		4,556		3,162
Marine segment contract revenues	$	79,298	$	84,480
Concrete Segment
Structural	$	15,744	$	13,676
Light Commercial		64,132		76,775
Other		—		—
Concrete segment contract revenues	$	79,876	$	90,451
Total contract revenues	$	159,174	$	174,931