Contracts with Customers - Summary of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Billed	$ 443,818	$ 434,776
Unbilled	206,251	167,490
Total accounts receivable, gross	650,069	602,266
Allowance for doubtful accounts	(3,952)	(3,955)
Total accounts receivable, net	$ 646,117	$ 598,311