Income Taxes - Uncertain Tax Positions Reconciliation (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 January 1	$ 213	$ 291	$ 223
Additions (reductions) for tax positions of prior years	(6)	(6)
Additions (reductions) for tax positions of prior years			68
Additions (reductions) for tax positions of current year	306
Reductions for settlements with tax authorities		0	0
Reductions for lapse of statute of limitations	(28)	(72)	0
Balance at December 31	$ 485	$ 213	$ 291