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Employee Benefit Plans (Schedule of Change in Projected Benefit Obligation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefit Plan [Member]      
Change in Projected Benefit Obligation:      
Beginning Balance $ 115,861 $ 100,891  
Service Cost 2,696 2,434 $ 2,171
Interest Cost 2,706 3,099 3,426
Actuarial (Gain) Loss (4,185) 12,585  
Benefits Paid (3,368) (3,148)  
Ending Balance 113,710 115,861 100,891
Other Benefits Plan [Member]      
Change in Projected Benefit Obligation:      
Beginning Balance 52,776 55,166  
Service Cost 917 993 839
Interest Cost 1,236 1,699 1,984
Actuarial (Gain) Loss (4,705) (4,279)  
Benefits Paid (828) (803)  
Ending Balance $ 49,396 $ 52,776 $ 55,166