Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 2,906	$ 2,906
Increases based on tax positions related to prior years	233	0
Decreases related to lapse of statute of limitation	(2,884)	0
Balance at December 31,	$ 255	$ 2,906