Income Taxes - Changes in Amount of 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 of unrecognized tax benefits	$ 17,939	$ 16,573
Decrease for prior year tax positions	(1,174)	(1)
Increase for current year tax positions	188	1,367
Total	$ 16,953	$ 17,939