Revenue (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended June 30,				Six months ended June 30,
	2023		2022		2023		2022
Marine Segment
Construction	$	77,721	$	53,210	$	131,733	$	112,362
Dredging		14,819		24,320		35,549		46,486
Specialty Services		8,003		4,789		12,559		7,951
Marine segment contract revenues	$	100,543	$	82,319	$	179,841	$	166,799
Concrete Segment
Structural	$	13,837	$	17,864	$	29,581	$	31,540
Light Commercial		68,154		94,392		132,286		171,167
Concrete segment contract revenues	$	81,991	$	112,256	$	161,867	$	202,707
Total contract revenues	$	182,534	$	194,575	$	341,708	$	369,506