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Borrowings (Detail Textuals) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Short-term Debt [Line Items]    
Long-term Federal Home Loan Bank Advances $ 121,382 $ 93,392
Bank    
Short-term Debt [Line Items]    
Long-term Federal Home Loan Bank Advances 121,400  
FHLB may call for early payment within the next year 5,000  
Maximum additional borrowing amount under agreement with FHLB 102,700  
Federal funds purchased    
Short-term Debt [Line Items]    
Maximum borrowing capacity of federal funds on unsecured basis 40,000  
Maximum borrowing capacity of federal funds on secured basis $ 17,200