Income Taxes - Changes in Gross 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	$ 140,160	$ 129,185
Increases for tax positions of prior years	2,906	886
Decreases for tax positions of prior years		(37,250)
Increases for tax positions of current year	61,993	47,339
Ending balance	$ 205,059	$ 140,160