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Federal Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Federal Income Taxes [Abstract]    
Tax provision at statutory rate (34%) $ 2,747 $ 3,992
Income on tax-exempt loans and securities (1,144) (1,134)
Tax benefit NOL carryback (1,113)  
Nondeductible interest expense relating to carrying tax-exempt obligations 43 45
Income from bank owned life insurance (269) (148)
Other, net (6) 125
Income tax provision $ 258 $ 2,880
Effective income tax rate 2.00% 15.20%
Statutory rate 21.00% 21.00%