Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	$ 217,811	$ 223,789
Loans individually evaluated for impairment	179,424	187,135
Loans collectively evaluated for impairment	38,387	36,654
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	40,264	40,645
Loans individually evaluated for impairment	40,241	40,621
Loans collectively evaluated for impairment	23	24
Construction Real Estate - Vision/SE LLC Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	20,518	25,761
Loans individually evaluated for impairment	19,433	24,328
Loans collectively evaluated for impairment	1,085	1,433
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	32,673	25,912
Loans individually evaluated for impairment	32,673	25,912
Construction Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	66	66
Loans collectively evaluated for impairment	66	66
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	182	30
Loans collectively evaluated for impairment	182	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	43,752	44,276
Loans individually evaluated for impairment	43,752	44,276
Residential Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	31,795	29,958
Loans collectively evaluated for impairment	31,795	29,958
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,043	1,412
Loans collectively evaluated for impairment	2,043	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,169	1,875
Loans collectively evaluated for impairment	1,169	1,875
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	43,305	51,978
Loans individually evaluated for impairment	43,305	51,978
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,044	1,876
Loans individually evaluated for impairment	20	20
Loans collectively evaluated for impairment	$ 2,024	$ 1,856