Income Taxes - Valuation Allowance (Details) - Valuation Allowance, Deferred Tax Asset - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation Allowances [Roll Forward]
Balance at Beginning of Period	$ 131,226	$ 130,084	$ 126,108
Charges to earnings	0	0	0
Charges to other accounts	9,861	1,142	3,976
Balance at End of Period	$ 141,087	$ 131,226	$ 130,084