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Securities - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
Security
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Security
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Schedule of Available-for-sale Securities [Line Items]          
Gross realized gains on available for sale securities | $ $ 0 $ 158,000 $ 0 $ 259,000  
Gross realized losses on available for sale securities | $ 0 $ 0 0 $ 0  
Carrying value of securities pledged as collateral | $ $ 139,056,000   $ 139,056,000   $ 117,646,000
U.S. Government and agencies          
Schedule of Available-for-sale Securities [Line Items]          
Number of available-for-sale securities, not in continuous loss position for 12 months or more 11   11    
Percentage of amortized cost (less than) 1.00%   1.00%    
State and municipal          
Schedule of Available-for-sale Securities [Line Items]          
Number of available-for-sale securities, not in continuous loss position for 12 months or more 5   5    
Percentage of amortized cost (less than) 2.00%   2.00%    
Stock in other banks          
Schedule of Available-for-sale Securities [Line Items]          
Percentage of amortized cost (less than) 7.00%   7.00%    
Number of available-for-sale securities, in continuous loss position for 12 months or more 1   1    
U.S. Government and agencies          
Schedule of Held-to-maturity Securities [Line Items]          
Number of held to maturity securities 1   1    
Percentage of amortized cost (less than) 1.00%   1.00%