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Investment Securities (Details 2)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
Investment
Dec. 31, 2015
USD ($)
Investment
Summary of gross unrealized losses on investment securities and fair market value of related securities    
Number of investments, Less than 12 months | Investment 4 43
Available-for-sale Securities, Less than 12 months, Fair Value $ 6,907 $ 56,846
Available-for-sale Securities, Less than 12 Months, Unrealized losses $ 81 $ 570
Number of investments, 12 months or longer | Investment 6 5
Available-for-sale Securities, 12 months or longer, Fair Value $ 8,162 $ 5,911
Available-for-sale Securities, 12 Months or Longer, Unrealized losses $ 45 $ 153
Number of investments, Total | Investment 10 48
Available-for-sale Securities, Fair Value, Total $ 15,069 $ 62,757
Available-for-sale Securities, Unrealized Losses, Total $ 126 $ 723
US Government agencies [Member]    
Summary of gross unrealized losses on investment securities and fair market value of related securities    
Number of investments, Less than 12 months | Investment 9
Available-for-sale Securities, Less than 12 months, Fair Value $ 12,853
Available-for-sale Securities, Less than 12 Months, Unrealized losses $ 113
Number of investments, 12 months or longer | Investment
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total | Investment 9
Available-for-sale Securities, Fair Value, Total $ 12,853
Available-for-sale Securities, Unrealized Losses, Total $ 113
SBA securities [Member]    
Summary of gross unrealized losses on investment securities and fair market value of related securities    
Number of investments, Less than 12 months | Investment 1
Available-for-sale Securities, Less than 12 months, Fair Value $ 1,531
Available-for-sale Securities, Less than 12 Months, Unrealized losses $ 5
Number of investments, 12 months or longer | Investment 2 2
Available-for-sale Securities, 12 months or longer, Fair Value $ 4,795 $ 4,691
Available-for-sale Securities, 12 Months or Longer, Unrealized losses $ 28 $ 133
Number of investments, Total | Investment 3 2
Available-for-sale Securities, Fair Value, Total $ 6,326 $ 4,691
Available-for-sale Securities, Unrealized Losses, Total $ 33 $ 133
States and political subdivisions [Member]    
Summary of gross unrealized losses on investment securities and fair market value of related securities    
Number of investments, Less than 12 months | Investment 1 7
Available-for-sale Securities, Less than 12 months, Fair Value $ 612 $ 3,125
Available-for-sale Securities, Less than 12 Months, Unrealized losses $ 1 $ 17
Number of investments, 12 months or longer | Investment 2 3
Available-for-sale Securities, 12 months or longer, Fair Value $ 974 $ 1,220
Available-for-sale Securities, 12 Months or Longer, Unrealized losses $ 4 $ 20
Number of investments, Total | Investment 3 10
Available-for-sale Securities, Fair Value, Total $ 1,586 $ 4,345
Available-for-sale Securities, Unrealized Losses, Total $ 5 $ 37
Mortgage-backed securities [Member]    
Summary of gross unrealized losses on investment securities and fair market value of related securities    
Number of investments, Less than 12 months | Investment 2 27
Available-for-sale Securities, Less than 12 months, Fair Value $ 4,764 $ 40,868
Available-for-sale Securities, Less than 12 Months, Unrealized losses $ 75 $ 440
Number of investments, 12 months or longer | Investment 2
Available-for-sale Securities, 12 months or longer, Fair Value $ 2,393
Available-for-sale Securities, 12 Months or Longer, Unrealized losses $ 13
Number of investments, Total | Investment 4 27
Available-for-sale Securities, Fair Value, Total $ 7,157 $ 40,868
Available-for-sale Securities, Unrealized Losses, Total $ 88 $ 440