Income Taxes - 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]
Unrecognized tax benefits at beginning of the year	$ 961	$ 0	$ 647
Reversal of prior year unrecognized tax benefits due to the expiration of the statute of limitations	0	0	(647)
Increases in unrecognized tax benefits as a result of tax positions taken during the prior period	0	961	0
Unrecognized tax benefits at end of the year	$ 961	$ 961	$ 0