Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 9,297	$ 8,276
Nonaccrual and accruing restructured loans	160,943	185,482
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	118,251	137,339
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	42,692	48,143
Partial Charge-Offs On Impaired Loans	83,300	105,100
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	19,881	22,601
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	19,871	22,587
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	10	14
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	6,517	13,939
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	6,489	13,260
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	28	679
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	15,606	21,574
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	15,606	21,574
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Construction Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	173	258
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	173	258
Construction Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	221	324
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	221	324
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	34,477	35,622
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	34,477	35,622
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Residential Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	33,041	37,685
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	33,041	37,685
Residential Real Estate - HELOC [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	2,742	2,425
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	2,742	2,425
Residential Real Estate - Installment [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual and accruing restructured loans	1,932	2,450
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	0	0
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	1,932	2,450
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,906	1,540
Nonaccrual and accruing restructured loans	41,009	44,278
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	41,009	44,278
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	0	0
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Nonaccrual and accruing restructured loans	5,344	4,326
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment	799	18
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment	4,545	4,308
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Partial Charge-Offs On Impaired Loans	$ 78,500	$ 96,900