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Securities (Details 2) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | $ 181,682 | $ 79,328
Unrealized Losses, Less Than 12 Months | (4,818) | (679)
Fair Value, 12 Months or Longer | 105,967 | 111,378
Unrealized Losses, 12 Months or Longer | (5,295) | (2,818)
Fair Value, Total | 287,649 | 190,706
Unrealized Losses, Total | (10,113) | (3,497)
Corporate bonds |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 784 | 397
Unrealized Losses, Less Than 12 Months | (12) | (3)
Fair Value, 12 Months or Longer | 377 | 383
Unrealized Losses, 12 Months or Longer | (11) | (5)
Fair Value, Total | 1,161 | 780
Unrealized Losses, Total | (23) | (8)
Small Business Administration |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 0 | 0
Unrealized Losses, Less Than 12 Months | 0 | 0
Fair Value, 12 Months or Longer | 13,716 | 14,182
Unrealized Losses, 12 Months or Longer | (506) | (396)
Fair Value, Total | 13,716 | 14,182
Unrealized Losses, Total | (506) | (396)
U.S. Treasury and U.S. government sponsored entities |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 4,175 | 3,970
Unrealized Losses, Less Than 12 Months | (79) | (34)
Fair Value, 12 Months or Longer | 1,854 | 1,912
Unrealized Losses, 12 Months or Longer | (58) | (35)
Fair Value, Total | 6,029 | 5,882
Unrealized Losses, Total | (137) | (69)
State and political subdivisions |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 70,499 | 33,188
Unrealized Losses, Less Than 12 Months | (2,019) | (220)
Fair Value, 12 Months or Longer | 24,947 | 25,721
Unrealized Losses, 12 Months or Longer | (1,166) | (423)
Fair Value, Total | 95,446 | 58,909
Unrealized Losses, Total | (3,185) | (643)
Mortgage-backed securities - residential |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 104,615 | 40,072
Unrealized Losses, Less Than 12 Months | (2,671) | (400)
Fair Value, 12 Months or Longer | 50,549 | 53,760
Unrealized Losses, 12 Months or Longer | (2,573) | (1,204)
Fair Value, Total | 155,164 | 93,832
Unrealized Losses, Total | (5,244) | (1,604)
Collateralized mortgage obligations - residential |  |
Investment securities with unrealized losses |  |
Fair Value, Less Than 12 Months | 1,609 | 1,701
Unrealized Losses, Less Than 12 Months | (37) | (22)
Fair Value, 12 Months or Longer | 14,524 | 15,420
Unrealized Losses, 12 Months or Longer | (981) | (755)
Fair Value, Total | 16,133 | 17,121
Unrealized Losses, Total | $ (1,018) | $ (777)

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