Contract Assets and Liabilities (Schedule of Contract Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Retention receivable	$ 546,668	$ 580,926
Costs and estimated earnings in excess of billings:
Claims	511,564	562,646
Unapproved change orders	565,269	512,831
Other unbilled costs and profits	83,877	68,369
Total costs and estimated earnings in excess of billings	1,160,710	1,143,846
Capitalized contract costs	95,732	117,913
Total contract assets	$ 1,803,110	$ 1,842,685