Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

	Three months ended June 30,				Six months ended June 30,
	2022		2021		2022		2021
Marine Segment
Construction	$	53,210	$	38,859	$	112,362	$	82,795
Dredging		24,320		20,672		46,486		45,354
Specialty Services		4,789		4,411		7,951		7,939
Marine segment contract revenues	$	82,319	$	63,942	$	166,799	$	136,088
Concrete Segment
Structural	$	17,864	$	17,545	$	31,540	$	34,206
Light Commercial		94,392		64,388		171,167		128,883
Other		—		—		—		7
Concrete segment contract revenues	$	112,256	$	81,933	$	202,707	$	163,096
Total contract revenues	$	194,575	$	145,875	$	369,506	$	299,184