Income Taxes - Net Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net deferred income tax liabilities
Deferred income tax assets	$ 56,065	$ 59,895
Deferred income tax liabilities	(25,250)	(33,099)
Valuation allowance	(29,983)	(21,700)
Net deferred income tax assets	$ 832	$ 5,096