Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 160,064	$ 195,106
Accruing restructured loans	31,490	28,683
Loans past due 90 days or more and accruing	2,131	3,561
Total nonperforming loans	193,685	227,350
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	17,600	37,797
Accruing restructured loans	4,514	2,848
Loans past due 90 days or more and accruing	0
Total nonperforming loans	22,114	40,645
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	13,965	25,761
Accruing restructured loans	0
Loans past due 90 days or more and accruing	0
Total nonperforming loans	13,965	25,761
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	15,977	14,021
Accruing restructured loans	11,441	11,891
Loans past due 90 days or more and accruing	0
Total nonperforming loans	27,418	25,912
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	158	66
Accruing restructured loans	101
Loans past due 90 days or more and accruing	0
Total nonperforming loans	259	66
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	155	30
Accruing restructured loans	177
Loans past due 90 days or more and accruing	0
Total nonperforming loans	332	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	36,583	43,461
Accruing restructured loans	0	815
Loans past due 90 days or more and accruing	0
Total nonperforming loans	36,583	44,276
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	28,999	25,201
Accruing restructured loans	9,099	4,757
Loans past due 90 days or more and accruing	1,132	2,610
Total nonperforming loans	39,230	32,568
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,197	1,412
Accruing restructured loans	718
Loans past due 90 days or more and accruing	0
Total nonperforming loans	2,915	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,497	1,777
Accruing restructured loans	694	98
Loans past due 90 days or more and accruing	129	58
Total nonperforming loans	2,320	1,933
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	40,371	43,704
Accruing restructured loans	2,607	8,274
Loans past due 90 days or more and accruing	0
Total nonperforming loans	42,978	51,978
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,562	1,876
Accruing restructured loans	2,139
Loans past due 90 days or more and accruing	870	893
Total nonperforming loans	$ 5,571	$ 2,769