Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Less Than 12 Months
Fair Value	$ 436,754	$ 67,063
Unrealized Losses	(15,840)	(352)
More Than 12 Months
Fair Value	13,625	4,032
Unrealized Losses	(7,784)	(7,882)
Total
Fair Value	450,379	71,095
Unrealized Losses	(23,624)	(8,234)
Mortgage Backed Securities - Residential
Less Than 12 Months
Fair Value	60,541	7,245
Unrealized Losses	(1,783)	(13)
More Than 12 Months
Fair Value	0	0
Unrealized Losses	0	0
Total
Fair Value	60,541	7,245
Unrealized Losses	(1,783)	(13)
Mortgage Backed Securities - Commercial
Less Than 12 Months
Fair Value	4,486	5,086
Unrealized Losses	(246)	(16)
More Than 12 Months
Fair Value	0	0
Unrealized Losses	0	0
Total
Fair Value	4,486	5,086
Unrealized Losses	(246)	(16)
Collateralized Mortgage Obligations
Less Than 12 Months
Fair Value	333,189	46,121
Unrealized Losses	(12,258)	(246)
More Than 12 Months
Fair Value	8,791	0
Unrealized Losses	(526)	0
Total
Fair Value	341,980	46,121
Unrealized Losses	(12,784)	(246)
State and Municipal Obligations
Less Than 12 Months
Fair Value	38,538	8,611
Unrealized Losses	(1,553)	(77)
More Than 12 Months
Fair Value	991	0
Unrealized Losses	(94)	0
Total
Fair Value	39,529	8,611
Unrealized Losses	(1,647)	(77)
Collateralized Debt Obligations
Less Than 12 Months
Fair Value	0	0
Unrealized Losses	0	0
More Than 12 Months
Fair Value	3,843	4,032
Unrealized Losses	(7,164)	(7,882)
Total
Fair Value	3,843	4,032
Unrealized Losses	$ (7,164)	$ (7,882)