Contract Assets and Liabilities (Schedule of Contract Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Retention receivable	$ 550,224	$ 580,926
Costs and estimated earnings in excess of billings:
Claims	519,399	562,646
Unapproved change orders	558,521	512,831
Other unbilled costs and profits	78,651	68,369
Total costs and estimated earnings in excess of billings	1,156,571	1,143,846
Capitalized contract costs	103,946	117,913
Total contract assets	$ 1,810,741	$ 1,842,685