Contract Assets and Liabilities - Summary of contract liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Contractors [Line Items]
Deferred revenue	$ 200,929		$ 165,699
Accrued loss provision	2,234		2,232
Contract liabilities	203,163		$ 167,931
Contract liabilities, Change	33,619	$ (21,433)
Change
Contractors [Line Items]
Deferred revenue, Change	35,230
Accrued loss provision, Change	2
Contract liabilities, Change	$ 35,232