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Investment Securities (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Amortized Cost    
Due in one year or less $ 6,864  
Due after one year through five years 56,996  
Due after five years through ten years 25,307  
Due after ten years 4,070  
Total 93,237  
Mortgage-backed securities 120,948  
Total available-for-sale securities 214,185 $ 217,635
Fair Value    
Due in one year or less 6,858  
Due after one year through five years 56,846  
Due after five year through ten years 25,081  
Due after ten years 4,033  
Total 92,818  
Mortgage-backed securities 119,832  
Total available-for-sale securities $ 212,650 $ 214,512