Loans and Asset Quality Information (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Nonaccrual loans	$ 66,525	$ 115,038
Commercial Unsecured
Nonaccrual loans	457	452
Commercial Secured
Nonaccrual loans	2,401	2,548
Secured by Inventory and Accounts Receivable
Nonaccrual loans	76	690
RealEstateConstructionMember
Nonaccrual loans	18,052	43,976
Real estate residential, farmland and mutli-family
Nonaccrual loans	20,341	36,480
Real estate home equity lines of credit
Nonaccrual loans	2,087	4,229
Real estate commercial
Nonaccrual loans	20,227	23,662
Consumer
Nonaccrual loans	2,884	3,001
Non-covered
Nonaccrual loans	33,034	73,566
Non-covered | Commercial Unsecured
Nonaccrual loans	307	452
Non-covered | Commercial Secured
Nonaccrual loans	2,398	2,190
Non-covered | Secured by Inventory and Accounts Receivable
Nonaccrual loans	17	588
Non-covered | RealEstateConstructionMember
Nonaccrual loans	6,354	22,772
Non-covered | Real estate residential, farmland and mutli-family
Nonaccrual loans	9,629	25,430
Non-covered | Real estate home equity lines of credit
Nonaccrual loans	1,622	3,161
Non-covered | Real estate commercial
Nonaccrual loans	9,885	16,203
Non-covered | Consumer
Nonaccrual loans	2,822	2,770
Covered
Nonaccrual loans	33,491	41,472
Covered | Commercial Unsecured
Nonaccrual loans	150
Covered | Commercial Secured
Nonaccrual loans	3	358
Covered | Secured by Inventory and Accounts Receivable
Nonaccrual loans	59	102
Covered | RealEstateConstructionMember
Nonaccrual loans	11,698	21,204
Covered | Real estate residential, farmland and mutli-family
Nonaccrual loans	10,712	11,050
Covered | Real estate home equity lines of credit
Nonaccrual loans	465	1,068
Covered | Real estate commercial
Nonaccrual loans	10,342	7,459
Covered | Consumer
Nonaccrual loans	$ 62	$ 231