Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Gross unrecognized tax benefits
Unrecognized tax benefits at the beginning of the period	$ 63,447	$ 58,763
Gross decrease in tax positions for prior years	(395)	(8,059)
Gross increase in tax positions for current year	11,971	12,743
Unrecognized tax benefits at the end of the period	$ 75,023	$ 63,447