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Employee Benefit Plans (Schedule of Changes in Benefit Obligation and Plan Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts recognized in accumulated other comprehensive loss      
Total $ 3,277 $ 3,944  
Supplemental Executive Retirement Plan [Member]      
Benefit obligations:      
Beginning of year 16,031 14,682  
Service cost 504 464 $ 395
Interest cost 389 460 523
Actuarial loss (gain) 222 911  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 536 486  
End of year 16,610 16,031 14,682
Fair value of plan assets:      
Beginning of year 0 0  
Employer contributions 536 486  
Defined Benefit Plan, Plan Assets, Benefits Paid 536 486  
End of year 0 0 0
Unfunded status at end of year(1) 16,610 16,031  
Amounts recognized in accumulated other comprehensive loss      
Net actuarial loss 2,653 3,090  
Total 2,653 3,090  
Other Postretirement Benefits Plan [Member]      
Benefit obligations:      
Beginning of year 4,420 4,049  
Service cost 26 28 48
Interest cost 103 123 148
Actuarial loss (gain) (202) 371  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 180 151  
End of year 4,167 4,420 4,049
Fair value of plan assets:      
Beginning of year 0 0  
Employer contributions 180 151  
Defined Benefit Plan, Plan Assets, Benefits Paid 180 151  
End of year 0 0 $ 0
Unfunded status at end of year(1) 4,167 4,420  
Amounts recognized in accumulated other comprehensive loss      
Net actuarial loss 718 967  
Prior service credit (94) (113)  
Total $ 624 $ 854