Employee Benefit Plans - Other Compensation Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Classification of liabilities in the Consolidated Balance Sheets
Unfunded liability	$ 4,681	$ 5,121
Other long-term liabilities	4,681	5,121
Total liabilities	4,681	5,121
Plan expenses	$ 1,500	$ 1,200	$ 1,200