Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2	2	2
Contract revenues	$ 748,322	$ 601,360	$ 709,942
Operating income (loss)	(8,030)	(9,317)	26,586
Depreciation and amortization	(20,915)	(22,608)	(23,893)
Assets	367,155	351,750
Property and equipment, net of depreciation	100,977	106,654
Marine Segment
Segment Reporting Information [Line Items]
Contract revenues	339,213	263,915	388,173
Marine Segment | Mexico and the Caribbean
Segment Reporting Information [Line Items]
Contract revenues	6,700	2,900
Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	409,109	337,445	321,769
Concrete Segment | Foreign
Segment Reporting Information [Line Items]
Contract revenues	0	0
Operating Segments | Marine Segment
Segment Reporting Information [Line Items]
Contract revenues	339,213	263,915	388,173
Operating income (loss)	9,787	5,760	29,815
Depreciation and amortization	(16,592)	(17,287)	(18,369)
Assets	239,369	236,773
Property and equipment, net of depreciation	91,390	93,383
Operating Segments | Concrete Segment
Segment Reporting Information [Line Items]
Contract revenues	409,109	337,445	321,769
Operating income (loss)	(17,817)	(15,077)	(3,229)
Depreciation and amortization	(7,465)	(8,143)	$ (8,848)
Assets	127,786	114,977
Property and equipment, net of depreciation	9,587	13,271
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues	$ 200
Intersegment Eliminations | Maximum
Segment Reporting Information [Line Items]
Contract revenues		$ 100