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Securities (Details 4) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Amortized Cost    
Due in one year or less $ 6,351 $ 7,452
Due after one year through five years 31,832 27,480
Due after five years through ten years 101,811 107,187
Due after ten years   0
Total held-to-maturity debt securities 139,994 142,119
Fair Value    
Due in one year or less 6,363 7,469
Due after one year through five years 32,368 27,866
Due after five years through ten years 102,923 107,497
Due after ten years   0
Total held-to-maturity debt securities $ 141,654 $ 142,832