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Federal Home Loan Bank Advances (Tables)
12 Months Ended
Dec. 31, 2018
Interest-Bearing Deposits/ Federal Home Loan Bank Advances [Abstract]  
Aggregate annual maturities of federal home loan bank advances
($ in thousands) Debt 
    
2019 $- 
2020  8,000 
2021  2,500 
2022  3,000 
2023  2,500 
Total $16,000