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Federal Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
[1]
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
[1]
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Federal Income Taxes [Abstract]                      
Tax provision at statutory rate (34%)                 $ 1,252 $ 3,252 $ 3,192
Income on tax-exempt loans and securities                 (1,404) (2,056) (1,751)
Nondeductible interest expense relating to carrying tax-exempt obligations                 33 32 24
Revaluation of deferred tax assets                   2,291  
Income from bank owned life insurance                 (108) (171) (210)
Stock option compensation                 39 55 30
Other, net                 23 162 17
Income tax provision $ 506 $ 654 $ (1,816) $ 491 $ 1,048 $ 774 $ 950 $ 793 $ (165) $ 3,565 $ 1,302
Effective income tax rate                 (2.80%) 62.10% 13.90%
Statutory rate                 21.00% 34.00%  
[1] Includes $2.3 million for revaluation of the net deferred tax assets