Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2	2	2
Intersegment revenues accounted for at current market prices and not eliminated	$ 1,800,000		$ 200,000
Contract revenues	796,394,000	$ 711,778,000	748,322,000
Maximum
Segment Reporting Information [Line Items]
Intersegment revenues accounted for at current market prices and not eliminated		100,000
Marine
Segment Reporting Information [Line Items]
Contract revenues	521,250,000	395,917,000	339,213,000
Marine | Foreign
Segment Reporting Information [Line Items]
Contract revenues	58,900,000	36,100,000	6,700,000
Concrete
Segment Reporting Information [Line Items]
Contract revenues	275,144,000	315,861,000	409,109,000
Concrete | Foreign
Segment Reporting Information [Line Items]
Contract revenues	$ 0	$ 0	$ 0