Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	$ 191,554	$ 223,789
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	142,362	187,135
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	49,192	36,654
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	22,114	40,645
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	22,103	40,621
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	11	24
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	13,965	25,761
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	13,261	24,328
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	704	1,433
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	27,418	25,912
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	27,418	25,912
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment
Construction Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	259	66
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	259	66
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	332	30
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	332	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	36,583	44,276
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	36,583	44,276
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment
Residential Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	38,098	29,958
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	38,098	29,958
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,915	1,412
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	2,915	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,191	1,875
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	2,191	1,875
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	42,978	51,978
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	42,978	51,978
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	4,701	1,876
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	19	20
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	$ 4,682	$ 1,856