Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	$ 56,249	$ 209,920
Unrealized Losses, Less Than 12 Months	(265)	(6,920)
Fair Value, 12 Months or Longer	152,261	67,237
Unrealized Losses, 12 Months or Longer	(6,110)	(5,106)
Fair Value, Total	208,510	277,157
Unrealized Losses, Total	(6,375)	(12,026)
Corporate bonds
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	199	1,052
Unrealized Losses, Less Than 12 Months	(1)	(2)
Fair Value, 12 Months or Longer	479	473
Unrealized Losses, 12 Months or Longer	(6)	(13)
Fair Value, Total	678	1,525
Unrealized Losses, Total	(7)	(15)
U.S. Treasury and U.S. government sponsored entities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	20,776
Unrealized Losses, Less Than 12 Months	0	(387)
Fair Value, 12 Months or Longer	10,812	0
Unrealized Losses, 12 Months or Longer	(167)	0
Fair Value, Total	10,812	20,776
Unrealized Losses, Total	(167)	(387)
State and political subdivisions
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	1,338	34,851
Unrealized Losses, Less Than 12 Months	(9)	(1,855)
Fair Value, 12 Months or Longer	25,348	7,492
Unrealized Losses, 12 Months or Longer	(1,280)	(952)
Fair Value, Total	26,686	42,343
Unrealized Losses, Total	(1,289)	(2,807)
Mortgage-backed securities - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	54,702	141,024
Unrealized Losses, Less Than 12 Months	(255)	(3,735)
Fair Value, 12 Months or Longer	72,225	27,026
Unrealized Losses, 12 Months or Longer	(2,039)	(1,349)
Fair Value, Total	126,927	168,050
Unrealized Losses, Total	(2,294)	(5,084)
Collateralized mortgage obligations
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	5,283
Unrealized Losses, Less Than 12 Months	0	(450)
Fair Value, 12 Months or Longer	20,394	15,726
Unrealized Losses, 12 Months or Longer	(1,293)	(1,263)
Fair Value, Total	20,394	21,009
Unrealized Losses, Total	(1,293)	(1,713)
Small business administration
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	6,927
Unrealized Losses, Less Than 12 Months	0	(491)
Fair Value, 12 Months or Longer	23,003	16,520
Unrealized Losses, 12 Months or Longer	(1,325)	(1,529)
Fair Value, Total	23,003	23,447
Unrealized Losses, Total	(1,325)	(2,020)
Equity securities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	10	7
Unrealized Losses, Less Than 12 Months	0	0
Fair Value, 12 Months or Longer	0	0
Unrealized Losses, 12 Months or Longer	0	0
Fair Value, Total	10	7
Unrealized Losses, Total	$ 0	$ 0