Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 183,227	$ 195,106
Accruing restructured loans	34,584	28,683
Loans past due 90 days or more and accruing	2,339	3,561
Total nonperforming loans	220,150	227,350
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	36,164	37,797
Accruing restructured loans	4,100	2,848
Loans past due 90 days or more and accruing	12
Total nonperforming loans	40,276	40,645
Construction Real Estate - Vision/SE LLC Commercial Land And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	20,518	25,761
Total nonperforming loans	20,518	25,761
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	14,724	14,021
Accruing restructured loans	17,949	11,891
Total nonperforming loans	32,673	25,912
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	66	66
Total nonperforming loans	66	66
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	182	30
Loans past due 90 days or more and accruing	16
Total nonperforming loans	198	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	43,211	43,461
Accruing restructured loans	541	815
Total nonperforming loans	43,752	44,276
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	26,374	25,201
Accruing restructured loans	5,421	4,757
Loans past due 90 days or more and accruing	1,523	2,610
Total nonperforming loans	33,318	32,568
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,043	1,412
Total nonperforming loans	2,043	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,147	1,777
Accruing restructured loans	22	98
Loans past due 90 days or more and accruing	221	58
Total nonperforming loans	1,390	1,933
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	36,754	43,704
Accruing restructured loans	6,551	8,274
Total nonperforming loans	43,305	51,978
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,044	1,876
Loans past due 90 days or more and accruing	567	893
Total nonperforming loans	$ 2,611	$ 2,769