Employee Benefit Plans (Amounts Recognized in Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Amounts recognized in the consolidated balance sheets
Accrued expenses and other current liabilities	$ 259	$ 1,014
Other long-term liabilities	613	870
Net amount recognized	872	1,884
Postretirement Benefits
Amounts recognized in the consolidated balance sheets
Accrued expenses and other current liabilities	1,359	1,310
Other long-term liabilities	22,583	24,014
Net amount recognized	$ 23,942	$ 25,324