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Available-for-Sale Securities (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Summary of securities with unrealized losses    
Less than 12 Months, Fair Value $ 51,483  
Less than 12 Months, Unrealized Losses (698)  
12 Months or Longer, Fair Value 703  
12 Months or Longer, Unrealized Losses (29)  
Total Fair Value 52,186 $ 37,200
Total Unrealized Losses (727)  
U.S. Treasury and Government agencies [Member]    
Summary of securities with unrealized losses    
Less than 12 Months, Fair Value 6,044  
Less than 12 Months, Unrealized Losses (52)  
12 Months or Longer, Fair Value  
12 Months or Longer, Unrealized Losses  
Total Fair Value 6,044  
Total Unrealized Losses (52)  
Mortgage-backed securities [Member]    
Summary of securities with unrealized losses    
Less than 12 Months, Fair Value 44,344 30,184
Less than 12 Months, Unrealized Losses (607) (253)
12 Months or Longer, Fair Value 703 7,061
12 Months or Longer, Unrealized Losses (29) (174)
Total Fair Value 45,047 37,245
Total Unrealized Losses (636) $ (427)
State and political subdivisions [Member]    
Summary of securities with unrealized losses    
Less than 12 Months, Fair Value 1,095  
Less than 12 Months, Unrealized Losses (39)  
12 Months or Longer, Fair Value  
12 Months or Longer, Unrealized Losses  
Total Fair Value 1,095  
Total Unrealized Losses $ (39)