Loans and Asset Quality Information (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013
ASSET QUALITY DATA
Nonaccrual loans	$ 68,471		$ 79,155
Foreclosed real estate - non-covered	9,346		12,251		15,425
Foreclosed real estate - covered	9,934		24,497		32,005
Total nonperforming assets	123,194		152,588		168,237
Non-covered nonperforming Assets [Member]
ASSET QUALITY DATA
Nonaccrual loans	47,533		41,938		42,338
Restructured loans - accruing	27,250		27,776		21,333
Total nonperforming loans	74,783		69,714		63,671
Foreclosed real estate - non-covered	9,346		12,251		15,425
Total nonperforming assets	84,129		81,965		79,096
Covered nonperforming Assets [Member]
ASSET QUALITY DATA
Nonaccrual loans	20,938	[1]	37,217	[1]	50,346	[1]
Restructured loans - accruing	8,193		8,909		6,790
Total nonperforming loans	29,131		46,126		57,136
Foreclosed real estate - covered	9,934		24,497		32,005
Total nonperforming assets	$ 39,065		$ 70,623		$ 89,141

[1] At June 30, 2014, December 31, 2013, and June 30, 2013, the contractual balance of the nonaccrual loans covered by FDIC loss share agreements was $34.3 million, $60.4 million, and $89.3 million, respectively.