Contracts in Progress (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Contracts in Progress
Costs incurred on uncompleted contracts	$ 1,561,338	$ 1,394,243
Estimated earnings	211,439	176,904
Costs incurred and estimated earnings on uncompleted contracts	1,772,777	1,571,147
Less: Billings to date	(1,735,741)	(1,553,704)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	37,036	17,443
Contract assets	84,407	81,522
Contract liabilities	$ (47,371)	$ (64,079)