Income Taxes - Reconciliation of Beginning and Ending Amounts of Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Valuation allowance for deferred tax assets, Balance at Beginning of Period	$ 186,491	$ 177,572
Valuation allowance for deferred tax assets, Additions	10,028	8,964
Valuation allowance for deferred tax assets, Deductions	(3,266)	(45)
Valuation allowance for deferred tax assets, Balance at End of Period	$ 193,253	$ 186,491