Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of segment reporting

	Year Ended December 31,
	2021		2020		2019
Marine
Contract revenues	$	263,915	$	388,173	$	369,138
Operating income		5,760		29,815		12,841
Depreciation and amortization expense		(17,287)		(18,369)		(19,889)
Total assets	$	236,773	$	290,372
Property and equipment, net		93,383		109,298
Concrete
Contract revenues	$	337,445	$	321,769	$	339,252
Operating income		(15,077)		(3,229)		(10,648)
Depreciation and amortization expense		(8,143)		(8,848)		(8,519)
Total assets	$	114,977	$	123,817
Property and equipment, net		13,271		16,199