Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 12,683	$ 11,330	$ 9,980
Additions based on tax positions related to current year	2,206	1,357	1,362
Additions to tax position of prior years	372	0	0
Reductions to tax position of prior years	0	(4)	(12)
Balance at end of year	$ 15,261	$ 12,683	$ 11,330