Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 95,739	$ 100,393
Accruing restructured loans	16,596	16,332
Loans past due 90 days or more and accruing	1,575	2,709
Total nonperforming loans	113,910	119,434
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	19,288	18,826
Accruing restructured loans	1,143	297
Loans past due 90 days or more and accruing	71	229
Total nonperforming loans	20,502	19,352
Construction Real Estate, SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,047	2,078
Accruing restructured loans	0	0
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	2,047	2,078
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	5,979	5,558
Accruing restructured loans	53	51
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	6,032	5,609
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	29	59
Accruing restructured loans	91	94
Loans past due 90 days or more and accruing	30	9
Total nonperforming loans	150	162
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	130	115
Accruing restructured loans	116	125
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	246	240
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	24,048	24,336
Accruing restructured loans	393	594
Loans past due 90 days or more and accruing	0
Total nonperforming loans	24,441	24,930
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	21,744	21,869
Accruing restructured loans	10,017	10,349
Loans past due 90 days or more and accruing	719	1,329
Total nonperforming loans	32,480	33,547
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,556	1,879
Accruing restructured loans	820	630
Loans past due 90 days or more and accruing	34	9
Total nonperforming loans	2,410	2,518
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,692	1,743
Accruing restructured loans	718	779
Loans past due 90 days or more and accruing	0
Total nonperforming loans	2,410	2,522
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	14,999	19,299
Accruing restructured loans	2,648	2,690
Loans past due 90 days or more and accruing	0
Total nonperforming loans	17,647	21,989
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	4,227	4,631
Accruing restructured loans	597	723
Loans past due 90 days or more and accruing	721	1,133
Total nonperforming loans	$ 5,545	$ 6,487