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Allowance for Loan Losses (Details 5) - Consumer Portfolio Segment [Member] - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Performing [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio $ 264,535 $ 264,708
Performing [Member] | Real estate-mortgage [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio 245,479 244,836
Performing [Member] | Consumer [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio 19,056 19,872
Non-Performing [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio 1,409 929
Non-Performing [Member] | Real estate-mortgage [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio 1,402 929
Non-Performing [Member] | Consumer [Member]    
Performing and non-performing outstanding balances of the residential and consumer portfolios    
Loan portfolio $ 7 $ 0