Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 7,466	$ 8,276
Nonaccrual and accruing restructured loans	167,884	185,482
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	126,102	137,339
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	41,782	48,143
Partial Charge-Offs On Impaired Loans	96,800	105,100
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	20,171	22,601
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	20,154	22,587
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	17	14
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	9,103	13,939
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	9,074	13,260
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	29	679
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	18,535	21,574
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	18,535	21,574
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	159	258
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	159	258
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	210	324
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	210	324
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	35,412	35,622
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	35,412	35,622
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	32,536	37,685
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	32,536	37,685
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,486	2,425
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	2,486	2,425
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,906	2,450
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,906	2,450
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	703	1,540
Nonaccrual and accruing restructured loans	42,128	44,278
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	42,128	44,278
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Nonaccrual and accruing restructured loans	5,238	4,326
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	799	18
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	4,439	4,308
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Partial Charge-Offs On Impaired Loans	$ 89,100	$ 96,900