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Loans And The Allowance For Loan Losses (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Net deferred loan origination costs $ 1,638,000 $ 1,400,000 $ 1,638,000 $ 1,400,000 $ 1,587,000
Loan commitments to lend additional funds to debtors 0   $ 0    
Period of timely payments before reversion to accruing status     6 months    
Total Real Estate Loans [Member] | Residential Mortgages [Member] | Mortgages [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loan servicing portfolio principal balance 74,000,000   $ 74,000,000   73,000,000
Mortgage servicing rights 600,000   600,000   600,000
Mortgage loans held-for-sale 0   0   $ 400,000
Total Real Estate Loans [Member] | Residential Mortgages [Member] | FNMA Loans [Member] | Mortgages [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Mortgages sold to FNMA $ 2,600,000 $ 0 $ 4,600,000 $ 0