Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance, unrecognized tax benefits	$ (168,516)	$ (141,164)
Gross increases - tax positions in prior period	(4,478)	(31,070)
Gross decreases - tax positions in prior period	2,675	1,530
Gross increases - current-period tax positions	(25,619)	(9,688)
Decreases relating to settlements	390	0
Reductions as a result of lapse of statute of limitations	3,610	11,791
Foreign exchange movement	0	85
Ending balance, unrecognized tax benefits	$ (191,938)	$ (168,516)