Income Taxes - Components of Income Tax Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Beginning unrecognized tax benefit	$ 494	$ 0	$ 0
Additions for tax positions of prior years	0	616	0
Reductions for tax positions of prior years	0	0	0
Lapse of statute of limitations	(118)	(122)	0
Decrease due to settlement with taxing authorities	0	0	0
Ending unrecognized tax benefit	$ 376	$ 494	$ 0