Accounts Receivable and Contract Assets, Net - Schedule of Changes in Allowance for Credit Losses for Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Allowance For Credit Loss [Abstract]
Balance, beginning of period	$ (4,772)	$ (1,753)	$ (3,788)	$ (1,125)
Provision for expected credit losses	(405)	(585)	(1,417)	(1,328)
Write-offs, net	(66)	81	(38)	196
Balance, end of period	$ (5,243)	$ (2,257)	$ (5,243)	$ (2,257)