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+ Details

Concentration of Risk and Enterprise-Wide Disclosures - Dragados/Hawaiian Dredging/Orion Joint Venture (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 10, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party
Contract revenues		$ 796,394	$ 711,778	$ 748,322
Dragados/Hawaiian Dredging/Orion Joint Venture \| US Navy
Related Party
Contract awarded	$ 2,800,000
Dragados/Hawaiian Dredging/Orion Joint Venture
Related Party
Contract awarded	$ 450,200
Contract revenues		$ 199,400	$ 90,500