Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	$ 207,729	$ 223,789
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	169,690	187,135
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	38,039	36,654
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	41,591	40,645
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	41,591	40,621
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment		24
Construction Real Estate - Vision/SEPH LLC Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	18,286	25,761
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	17,272	24,328
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,014	1,433
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	29,562	25,912
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	29,562	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	61	66
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	61	66
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	133	30
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	133	30
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	37,277	44,276
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	37,277	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	31,651	29,958
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	31,651	29,958
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,972	1,412
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,972	1,412
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,295	1,875
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,295	1,875
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	43,969	51,978
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	43,969	51,978
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,932	1,876
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	19	20
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	$ 1,913	$ 1,856