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Borrowings (Tables)
 12 Months Ended
Dec. 31, 2016
Interest Bearing Deposits/ Borrowings [Abstract]  
Aggregate annual maturities of federal home loan bank advances
($ in thousands) Debt 
    
2017  13,000 
2018  7,000 
2019  6,500 
2020  - 
2021  - 
Total $26,500