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Other Borrowings (Summary Of Short Term Borrowings) (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Short Term [Member]    
Short-term Debt [Line Items]    
Balance at end of year
Maximum month-end outstanding balance 6,265,000 814,000
Average outstanding balance during the year $ 371,000 $ 184,000
Average interest rate during the year 1.08% 1.09%
Average interest rate at end of year
FHLB Borrowings [Member]    
Short-term Debt [Line Items]    
Maximum month-end outstanding balance   $ 12,000,000
Average outstanding balance during the year   $ 2,269.00
Average interest rate during the year   1.23%