Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Contract revenues	$ 852,260	$ 796,394	$ 711,778
Cost of contract revenues	746,646	705,234	650,115
Gross profit	105,614	91,160	61,663
Selling, general and administrative expenses	93,471	82,537	69,431
Amortization of intangible assets			427
Gain on disposal of assets, net	(2,468)	(2,898)	(8,455)
Intangible asset impairment loss			6,890
Operating income (loss)	14,611	11,521	(6,630)
Total assets	414,652	417,317
Property and equipment, net	88,210	86,098
Marine
Segment Reporting Information [Line Items]
Contract revenues	544,831	521,250	395,917
Marine | Operating Segments
Segment Reporting Information [Line Items]
Contract revenues	544,831	521,250	395,917
Cost of contract revenues	457,725	465,857	355,777
Gross profit	87,106	55,393	40,140
Selling, general and administrative expenses	57,730	54,491	43,307
Gain on disposal of assets, net	(487)	(1,416)	(6,837)
Operating income (loss)	29,863	2,318	3,670
Total assets	315,474	316,199	318,684
Property and equipment, net	84,332	81,342	82,215
Depreciation and amortization	18,983	18,693	18,219
Capital expenditures	37,579	12,187	8,375
Concrete
Segment Reporting Information [Line Items]
Contract revenues	307,429	275,144	315,861
Concrete | Operating Segments
Segment Reporting Information [Line Items]
Contract revenues	307,429	275,144	315,861
Cost of contract revenues	288,921	239,377	294,338
Gross profit	18,508	35,767	21,523
Selling, general and administrative expenses	35,741	28,046	26,124
Amortization of intangible assets			427
Gain on disposal of assets, net	(1,981)	(1,482)	(1,618)
Intangible asset impairment loss			6,890
Operating income (loss)	(15,252)	9,203	(10,300)
Total assets	99,178	101,118	98,209
Property and equipment, net	3,878	4,756	5,619
Depreciation and amortization	3,279	4,072	5,659
Capital expenditures	$ 1,283	$ 1,904	$ 534