Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Segment Reporting Information [Line Items]
Contract revenues	$ 216,301	$ 188,653
Cost of contract revenues	190,422	165,638
Gross profit	25,879	23,015
Selling, general and administrative expenses	26,319	22,545
Amortization of intangible assets	390
Loss (gain) on disposal of assets, net	(35)	(363)
Operating (loss) income	(795)	833
Interest expense	(1,531)	(2,334)
Other income	161	227
Income (loss) before income taxes	(2,165)	(1,274)
Income tax (benefit) expense	(6,852)	140
Net Income (Loss)	4,687	(1,414)
Total assets	478,723	414,652	$ 414,652
Property and equipment, net	125,444	88,210	$ 88,210
Depreciation and amortization	6,387	5,403
Capital expenditures	8,575	9,033
General Corporate
Segment Reporting Information [Line Items]
Selling, general and administrative expenses	15,111	13,298
Operating (loss) income	(15,111)	(13,298)
Total assets	27,941	25,174
Property and equipment, net	16,381	16,921
Depreciation and amortization	706	153
Capital expenditures	107	5,664
Marine
Segment Reporting Information [Line Items]
Contract revenues	110,129	127,163
Marine | Operating Segments
Segment Reporting Information [Line Items]
Contract revenues	110,129	127,163
Cost of contract revenues	95,550	108,638
Gross profit	14,579	18,525
Selling, general and administrative expenses	7,608	6,373
Amortization of intangible assets	390
Loss (gain) on disposal of assets, net	1	(170)
Operating (loss) income	6,580	12,322
Total assets	352,770	290,300
Property and equipment, net	104,209	67,411
Depreciation and amortization	4,981	4,378
Capital expenditures	7,037	3,307
Concrete
Segment Reporting Information [Line Items]
Contract revenues	106,172	61,490
Concrete | Operating Segments
Segment Reporting Information [Line Items]
Contract revenues	106,172	61,490
Cost of contract revenues	94,872	57,000
Gross profit	11,300	4,490
Selling, general and administrative expenses	3,600	2,874
Loss (gain) on disposal of assets, net	(36)	(193)
Operating (loss) income	7,736	1,809
Total assets	98,012	99,178
Property and equipment, net	4,854	3,878
Depreciation and amortization	700	872
Capital expenditures	$ 1,431	$ 62