Accounts Receivable - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Contract receivables	$ 374,826	$ 382,096
Other	2,968	5,538
Accounts receivable, gross current	377,794	387,634
Less: allowance for doubtful accounts	(2,441)	(1,696)
Accounts receivable, net	$ 375,353	$ 385,938