Loans and Asset Quality Information (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
ASSET QUALITY DATA
Nonaccrual loans	$ 66,525		$ 115,038
Restructured loans - accruing	400
Foreclosed real estate - non-covered	26,285		37,023
Foreclosed real estate - covered	47,290		85,272
Total nonperforming assets	202,351		263,271
Non-covered nonperforming Assets
ASSET QUALITY DATA
Nonaccrual loans	33,034		73,566
Restructured loans - accruing	24,848		11,720
Accruing loans > 90 days past due
Total nonperforming loans	57,882		85,286
Nonperforming loans held for sale	21,938
Foreclosed real estate - non-covered	26,285		37,023
Total nonperforming assets	106,105		122,309
Covered nonperforming Assets
ASSET QUALITY DATA
Nonaccrual loans	33,491	[1]	41,472	[1]
Restructured loans - accruing	15,465		14,218
Accruing loans > 90 days past due
Total nonperforming loans	48,956		55,690
Foreclosed real estate - covered	47,290		85,272
Total nonperforming assets	$ 96,246		$ 140,962

[1] (1) At December 31, 2012 and December 31, 2011, the contractual balance of the nonaccrual loans covered by FDIC loss share agreements was $64.4 million and $69.0 million, respectively.