Revenue from Contracts with Customers - Summary of Uncompleted Contracts and Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Costs incurred on uncompleted contracts	$ 7,458,281	$ 7,034,838
Estimated earnings	1,031,582	995,766
Costs and estimated earnings on uncompleted contracts	8,489,863	8,030,604
Less: billings to date	(8,509,218)	(8,070,859)
Net contract liabilities	$ (19,355)	$ (40,255)	$ 66,127