Other Benefit Plans (Schedule of Details of Compensation Arrangements) (Details) - Rabbi Trust $ in Thousands	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	$ 7,708
Supplemental Executive Retirement Agreements
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	1,916
Executive Deferred Compensation Agreement
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	1,908
Director Deferred Fee Agreement
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	116
Executive Employment Agreements
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	3,349
Separation Agreement
Defined Benefit Plan Disclosure [Line Items]
Total compensation agreements	$ 419