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Commitment and Contigent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Schedule Of Commitments To Extend Credit [Table Text Block] |
|  | December 31
(Dollars in thousands) | 2017 |  | 2016
Commitments to extend credit | $ | 57,014 |  | $ | 45,979
Standby letters of credit |  | 7,390 |  |  | 7,432

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