Securities (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	$ 111,095	$ 212,479
Unrealized Losses, Less Than 12 Months	(1,277)	(4,945)
Fair Value, 12 Months or Longer	54,807	49,393
Unrealized Losses, 12 Months or Longer	(1,696)	(1,666)
Fair Value, Total	165,902	261,872
Unrealized Losses, Total	(2,973)	(6,611)
Corporate bonds
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	481	786
Unrealized Losses, Less Than 12 Months	(2)	(8)
Fair Value, 12 Months or Longer	102	0
Unrealized Losses, 12 Months or Longer	(2)	0
Fair Value, Total	583	786
Unrealized Losses, Total	(4)	(8)
Small Business Administration
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	7,867	8,770
Unrealized Losses, Less Than 12 Months	(105)	(205)
Fair Value, 12 Months or Longer	7,198	7,890
Unrealized Losses, 12 Months or Longer	(224)	(325)
Fair Value, Total	15,065	16,660
Unrealized Losses, Total	(329)	(530)
U.S. Treasury and U.S. government sponsored entities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	5,538	4,015
Unrealized Losses, Less Than 12 Months	(12)	(54)
Fair Value, 12 Months or Longer	411	502
Unrealized Losses, 12 Months or Longer	(13)	0
Fair Value, Total	5,949	4,517
Unrealized Losses, Total	(25)	(54)
State and political subdivisions
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	33,400	92,560
Unrealized Losses, Less Than 12 Months	(489)	(2,745)
Fair Value, 12 Months or Longer	15,864	286
Unrealized Losses, 12 Months or Longer	(417)	(15)
Fair Value, Total	49,264	92,846
Unrealized Losses, Total	(906)	(2,760)
Mortgage-backed securities - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	55,980	98,348
Unrealized Losses, Less Than 12 Months	(574)	(1,823)
Fair Value, 12 Months or Longer	20,949	29,743
Unrealized Losses, 12 Months or Longer	(529)	(729)
Fair Value, Total	76,929	128,091
Unrealized Losses, Total	(1,103)	(2,552)
Collateralized mortgage obligations - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	7,806	7,956
Unrealized Losses, Less Than 12 Months	(94)	(108)
Fair Value, 12 Months or Longer	10,283	10,972
Unrealized Losses, 12 Months or Longer	(511)	(597)
Fair Value, Total	18,089	18,928
Unrealized Losses, Total	(605)	(705)
Equity securities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	23	44
Unrealized Losses, Less Than 12 Months	(1)	(2)
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	23	44
Unrealized Losses, Total	$ (1)	$ (2)