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]
Unrecognized tax benefits beginning balance	$ 37,753	$ 34,480
Gross decrease for tax positions of prior year	0	0
Gross increase for tax positions of prior year	95	307
Gross increase for tax positions of current year	4,162	2,966
Unrecognized tax benefits end balance	$ 42,010	$ 37,753