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Benefits Plans (Pension Plan's Funded Status and Components of Net Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]        
Change in Benefit Obligation: Benefit obligation, beginning of year $ 7,834 $ 7,581    
Change in Benefit Obligation: Interest Cost 245 310    
Change in Benefit Obligation: Actuarial gain 773 689    
Change in Benefit Obligation: Benefits paid (459) (479)    
Change in Benefit Obligation: Lump sum distributions (199) (267)    
Change in Benefit Obligation: Benefit obligation, ending 8,194 7,834    
Change in Plan Assets: Fair value of assets, beginning of year 7,576 6,964    
Change in Plan Assets: Actual return (loss) on plan assets 194 1,358    
Change in Plan Assets: Benefits paid (459) (479)    
Change in Plan Assets: Fair value of assets, ending 7,112 7,576    
Reconciliation of Funded Status: Projected benefit obligation 8,194 7,581 $ 8,194 $ 7,834
Reconciliation of Funded Status: Fair value of assets $ 7,576 $ 7,576 7,112 7,576
Reconciliation of Funded Status: Unfunded status, included in other liabilities, net     $ (1,082) $ (258)
Valuation assumptions used to determine benefit obligation at period end: Discount rate     2.52% 3.22%