Significant Accounting Policies - Contract Balances (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) category	Dec. 31, 2021 USD ($)
Significant Accounting Policies
Accounts receivable, net	$ 99,350	$ 184,102
Deferred revenues	16,413	17,518
Customer deposits	20,070	17,707
Costs to obtain and fulfill a contract	1,958	2,328
Unbilled receivables, net	26,300	$ 22,600
Revenue recognized from deferred revenue	13,500
Amortization of contract costs	$ 600
Practical expedient on incremental costs of obtaining contracts	true
Number of principal categories | category	2