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Securities (Contractual Maturity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Available-for-Sale, Amortized Cost    
Due in one year or less $ 3,258  
Due in one year through five years 13,965  
Due in five through ten years 78,174  
Due in over ten years 57,422  
Amortized cost 152,819 $ 140,204
Available-for-Sale, Estimated Fair Value    
Due in one year or less 3,261  
Due in one year through five years 14,053  
Due in five through ten years 79,485  
Due in over ten years 57,681  
Estimated fair value 154,480 140,548
Held-to-Maturity, Amortized Cost    
Due in one year or less 0  
Due in one year through five years 5,953  
Due in five through ten years 12,255  
Due in over ten years 16,901  
Amortized cost 35,109 37,282
Held-to-Maturity, Estimated Fair Value    
Due in one year or less 0  
Due in one year through five years 6,035  
Due in five through ten years 12,667  
Due in over ten years 17,262  
Estimated Fair Value $ 35,964 $ 37,558