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Securities (Details 2) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Schedule of securities with unrealized losses    
Less than 12 Months, Fair Value $ 37,666 $ 51,483
Less than 12 Months, Unrealized Losses (284) (698)
12 Months or Longer, Fair Value 4,828 703
12 Months or Longer, Unrealized Losses (83) (29)
Total, Fair Value 42,494 52,186
Total, Unrealized Losses (367) (727)
U.S. Treasury and Government Agencies [Member]    
Schedule of securities with unrealized losses    
Less than 12 Months, Fair Value 1,420 6,044
Less than 12 Months, Unrealized Losses (6) (52)
12 Months or Longer, Fair Value 2,565
12 Months or Longer, Unrealized Losses (36)
Total, Fair Value 3,985 6,044
Total, Unrealized Losses (42) (52)
Mortgage-backed securities [Member]    
Schedule of securities with unrealized losses    
Less than 12 Months, Fair Value 34,939 44,344
Less than 12 Months, Unrealized Losses (263) (607)
12 Months or Longer, Fair Value 2,263 703
12 Months or Longer, Unrealized Losses (47) (29)
Total, Fair Value 37,202 45,047
Total, Unrealized Losses (310) (636)
State and political subdivisions [Member]    
Schedule of securities with unrealized losses    
Less than 12 Months, Fair Value 1,307 1,095
Less than 12 Months, Unrealized Losses (15) (39)
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value 1,307 1,095
Total, Unrealized Losses $ (15) $ (39)