Fair Value Measurements (Schedule of Fair Value Assets and Liabilities Measured on a Recurring Basis) (Details) - Recurring [Member] - Interest Rate Swap Agreements [Member] - Other Liabilities [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives Fair Value [Line Items]
Interest rate swap agreements - Other liabilities	$ 7,469	$ 17,568
Level 2 [Member]
Derivatives Fair Value [Line Items]
Interest rate swap agreements - Other liabilities	$ 7,469	$ 17,568