Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Less Than 12 Months
Fair Value	$ 329,757	$ 502,714
Unrealized Losses	(13,201)	(17,370)
More Than 12 Months
Fair Value	136,073	45,958
Unrealized Losses	(3,057)	(9,314)
Total
Fair Value	465,830	548,672
Unrealized Losses	(16,258)	(26,684)
Mortgage Backed Securities - Residential
Less Than 12 Months
Fair Value	55,101	52,524
Unrealized Losses	(878)	(1,645)
More Than 12 Months
Fair Value	123	6,022
Unrealized Losses	(1)	(347)
Total
Fair Value	55,224	58,546
Unrealized Losses	(879)	(1,992)
Mortgage Backed Securities - Commercial
Less Than 12 Months
Fair Value		0
Unrealized Losses		0
More Than 12 Months
Fair Value		4,357
Unrealized Losses		(252)
Total
Fair Value		4,357
Unrealized Losses		(252)
Collateralized Mortgage Obligations
Less Than 12 Months
Fair Value	258,410	406,291
Unrealized Losses	(11,873)	(13,979)
More Than 12 Months
Fair Value	118,571	29,588
Unrealized Losses	(1,058)	(1,920)
Total
Fair Value	376,981	435,879
Unrealized Losses	(12,931)	(15,899)
State and Municipal Obligations
Less Than 12 Months
Fair Value	16,246	43,899
Unrealized Losses	(450)	(1,746)
More Than 12 Months
Fair Value	7,430	2,305
Unrealized Losses	(29)	(176)
Total
Fair Value	23,676	46,204
Unrealized Losses	(479)	(1,922)
Collateralized Debt Obligations
Less Than 12 Months
Fair Value	0	0
Unrealized Losses	0	0
More Than 12 Months
Fair Value	9,949	3,686
Unrealized Losses	(1,969)	(6,619)
Total
Fair Value	9,949	3,686
Unrealized Losses	$ (1,969)	$ (6,619)