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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Commitments to extend credit    
Commitments and Contingencies    
Commitments to extend credit $ 211,549 $ 217,166
Undisbursed lines of credit    
Commitments and Contingencies    
Commitments to extend credit 209,771 215,952
Undisbursed portions of construction loans    
Commitments and Contingencies    
Commitments to extend credit 31,001 25,856
Standby letters of credit and financial guarantees    
Commitments and Contingencies    
Commitments to extend credit $ 1,778 1,214
Minimum | Undisbursed lines of credit    
Commitments and Contingencies    
Commitments to extend credit, term of agreement 1 month  
Maximum | Undisbursed lines of credit    
Commitments and Contingencies    
Commitments to extend credit, term of agreement 12 months  
Maximum | Standby letters of credit and financial guarantees    
Commitments and Contingencies    
Commitments to extend credit, term of agreement 1 year  
Probable loan loss experience on unfunded obligations [Member]    
Commitments and Contingencies    
Loss Contingency, Estimate of Possible Loss $ 125 $ 150