Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary of activities related to unrecognized tax benefits
Balance at the beginning of the period	$ 6,057	$ 12,127
Additions to tax positions related to prior years	29	74
Subtractions to tax positions related to prior years	(4)	(6,144)
Balance at the end of the period	6,082	$ 6,057
Increase (decrease) in net deferred tax liability	$ 4,500