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Borrowings (Contractual Maturities of Other Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Borrowings [Abstract]    
2018 $ 874  
2019 15,451  
2020 8,144  
2022 11,476  
Long-term Federal Home Loan Bank Advances, Total $ 35,945 $ 32,001