Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 180,381	$ 195,106
Accruing restructured loans	27,348	28,683
Loans past due 90 days or more and accruing	1,915	3,561
Total nonperforming loans	209,644	227,350
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	37,356	37,797
Accruing restructured loans	4,235	2,848
Loans past due 90 days or more and accruing	2
Total nonperforming loans	41,593	40,645
Construction Real Estate - Vision/SEPH LLC Commercial Land And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	18,286	25,761
Accruing restructured loans	0
Loans past due 90 days or more and accruing	0
Total nonperforming loans	18,286	25,761
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	16,953	14,021
Accruing restructured loans	12,609	11,891
Loans past due 90 days or more and accruing	0
Total nonperforming loans	29,562	25,912
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	0	66
Accruing restructured loans	61
Loans past due 90 days or more and accruing	86
Total nonperforming loans	147	66
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	133	30
Accruing restructured loans	0
Loans past due 90 days or more and accruing	8
Total nonperforming loans	141	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	37,257	43,461
Accruing restructured loans	20	815
Loans past due 90 days or more and accruing	0
Total nonperforming loans	37,277	44,276
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	26,145	25,201
Accruing restructured loans	5,506	4,757
Loans past due 90 days or more and accruing	1,045	2,610
Total nonperforming loans	32,696	32,568
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,972	1,412
Accruing restructured loans	0
Loans past due 90 days or more and accruing	0
Total nonperforming loans	1,972	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,273	1,777
Accruing restructured loans	22	98
Loans past due 90 days or more and accruing	159	58
Total nonperforming loans	1,454	1,933
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	39,074	43,704
Accruing restructured loans	4,895	8,274
Loans past due 90 days or more and accruing	0
Total nonperforming loans	43,969	51,978
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,932	1,876
Accruing restructured loans	0
Loans past due 90 days or more and accruing	615	893
Total nonperforming loans	$ 2,547	$ 2,769