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Financial Instruments with Off-Balance-Sheet Risk (Schedule of Financial Instruments) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Commitments to extend credit $ 27,144 $ 18,247
Unfunded commitments under lines of credit 100,530 90,287
Commercial and standby letters of credit 5,897 $ 4,286
Collateralized Letters Of Credit Outstanding 5,000  
Excess of insurance limits held in cash accounts $ 1,200