Accounts Receivable, Net of Allowance, and Contract Assets and Liabilities - Schedule of Accounts Receivable, Net of Allowance and Contract Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Contract billings	$ 910,400	$ 1,027,100
Less allowance	(7,900)	(7,800)
Accounts receivable, net of allowance	902,477	1,019,324
Contract Assets [Abstract]
Retainage	272,900	296,800
Unbilled receivables	1,051,400	931,100
Contract assets	$ 1,324,300	$ 1,227,927