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Contract Assets and Liabilities - Summary of contract liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Contractors [Line Items]
Deferred revenue	$ 172,356		$ 165,699
Accrued loss provision	2,270		2,232
Contract liabilities	174,626		$ 167,931
Contract liabilities, Change	5,582	$ (8,515)
Change
Contractors [Line Items]
Deferred revenue, Change	6,657
Accrued loss provision, Change	38
Contract liabilities, Change	$ 6,695

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

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