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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies    
Federal reserve deposit requirement reserve amount $ 4,575  
Uninsured deposits $ 10,645  
% of Total Loans 100.00% 100.00%
Probable loan loss experience on unfunded obligations    
Commitments and Contingencies    
Loss Contingency, Estimate of Possible Loss $ 125 $ 150
Undisbursed lines of credit    
Commitments and Contingencies    
Commitments to extend credit 257,557 215,952
Standby letters of credit and financial guarantees    
Commitments and Contingencies    
Commitments to extend credit $ 1,858 $ 1,214
Commercial    
Commitments and Contingencies    
Percentage Of Loan Commitments 55.00%  
% of Total Loans 15.10% 22.20%
Real Estate Portfolio Segment    
Commitments and Contingencies    
Percentage Of Loan Commitments 35.00%  
Maximum loan to value ratio 80.00%  
% of Total Loans 72.90% 68.60%
Consumer    
Commitments and Contingencies    
Percentage Of Loan Commitments 10.00%  
% of Total Loans 12.00% 9.20%
Real estate related    
Commitments and Contingencies    
% of Total Loans 81.40% 75.70%
Commercial and Real estate related    
Commitments and Contingencies    
% of Total Loans 96.50% 97.90%