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Short Term Borrowings (Tables)
12 Months Ended
Dec. 31, 2017
Short-term Debt:  
Schedule of Short-term Debt [Table Text Block]
20172016
WeightedWeighted
(Dollars in thousands)AmountAvg. RateAmountAvg. Rate
Federal funds purchased:
As of December 31$$
Average during the year92.01%141.21%
Maximum outstanding at
any month-end
Securities sold under
agreements to repurchase:
As of December 31$2,6580.50%$3,3660.50%
Average during the year3,4670.52%2,9690.50%
Maximum outstanding at
any month-end4,1523,507