Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2	2	2
Contract revenues	$ 601,360	$ 709,942	$ 708,390
Operating (loss) income	(9,317)	26,586	2,193
Depreciation and amortization	(22,608)	(23,893)	(26,096)
Assets	351,750	414,189
Property and equipment, net of depreciation	106,654	125,497
Marine Segment
Segment Reporting Information [Line Items]
Contract revenues	263,915	388,173	369,138
Marine Segment | Mexico and the Caribbean
Segment Reporting Information [Line Items]
Contract revenues	2,900	12,500
Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	337,445	321,769	339,252
Concrete Segment | Foreign
Segment Reporting Information [Line Items]
Contract revenues	0	0
Operating Segments | Marine Segment
Segment Reporting Information [Line Items]
Contract revenues	263,915	388,173	369,138
Operating (loss) income	5,760	29,815	12,841
Depreciation and amortization	(17,287)	(18,369)	(19,889)
Assets	236,773	290,372
Property and equipment, net of depreciation	93,383	109,298
Operating Segments | Marine Segment | Revision of Prior Period, Error Correction, Adjustment
Segment Reporting Information [Line Items]
Operating (loss) income		12,900	11,800
Operating Segments | Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	337,445	321,769	339,252
Operating (loss) income	(15,077)	(3,229)	(10,648)
Depreciation and amortization	(8,143)	(8,848)	(8,519)
Assets	114,977	123,817
Property and equipment, net of depreciation	13,271	16,199
Operating Segments | Concrete Segment | Revision of Prior Period, Error Correction, Adjustment
Segment Reporting Information [Line Items]
Operating (loss) income		(12,900)	$ (11,800)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues	$ 100	$ 2,800