Summary of Significant Accounting Policies - Rollforward of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Beginning Balance	$ (69,632)	$ (63,646)
Revenue recognized that was included in deferred revenue at the beginning of the period	49,052	40,811
Consideration received in advance of services performed net of revenue recognized in the current period	(53,084)	(46,719)
Other	317	(78)
Ending Balance	$ (73,347)	$ (69,632)