Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Contract revenues	$ 796,394	$ 711,778	$ 748,322
Costs of contract revenues	705,234	650,115	697,580
Gross profit	91,160	61,663	50,742
Selling, general and administrative expenses	82,537	69,431	62,503
Amortization of intangible assets		427	1,239
Gain on disposal of assets, net	(2,898)	(8,455)	(4,970)
Intangible asset impairment loss		6,890
Operating income (loss)	11,521	(6,630)	(8,030)
Total assets	417,317	416,893
Property and equipment, net	86,098	87,834
Marine
Segment Reporting Information [Line Items]
Contract revenues	521,250	395,917	339,213
Costs of contract revenues	465,857	355,777	296,594
Gross profit	55,393	40,140	42,619
Selling, general and administrative expenses	54,491	43,307	36,909
Gain on disposal of assets, net	(1,416)	(6,837)	(4,077)
Operating income (loss)	$ 2,318	$ 3,670	$ 9,787
Contract revenues, percent	100.00%	100.00%	100.00%
Costs of contract revenues, percent	89.40%	89.90%	87.40%
Gross profit, percent	10.60%	10.10%	12.60%
Selling, general and administrative expenses, percent	10.50%	10.90%	10.90%
Gain on disposal of assets, net, percent	(0.30%)	(1.70%)	(1.20%)
Operating income (loss), percent	0.40%	0.90%	2.90%
Total assets	$ 316,199	$ 318,684	$ 239,369
Property and equipment, net	81,342	82,215	91,390
Depreciation and amortization	18,693	18,219	16,592
Capital expenditures	12,187	8,375	13,323
Concrete
Segment Reporting Information [Line Items]
Contract revenues	275,144	315,861	409,109
Costs of contract revenues	239,377	294,338	400,986
Gross profit	35,767	21,523	8,123
Selling, general and administrative expenses	28,046	26,124	25,594
Amortization of intangible assets		427	1,239
Gain on disposal of assets, net	(1,482)	(1,618)	(893)
Intangible asset impairment loss		6,890
Operating income (loss)	$ 9,203	$ (10,300)	$ (17,817)
Contract revenues, percent	100.00%	100.00%	100.00%
Costs of contract revenues, percent	87.00%	93.20%	98.00%
Gross profit, percent	13.00%	6.80%	2.00%
Selling, general and administrative expenses, percent	10.20%	8.30%	6.30%
Amortization of intangible assets, percent		0.10%	0.30%
Gain on disposal of assets, net, percent	(0.50%)	(0.50%)	(0.20%)
Intangible asset impairment loss, percent		2.20%
Operating income (loss), percent	3.30%	(3.30%)	(4.40%)
Total assets	$ 101,118	$ 98,209	$ 127,786
Property and equipment, net	4,756	5,619	9,587
Depreciation and amortization	4,072	5,659	7,465
Capital expenditures	$ 1,904	$ 534	$ 1,261