Loans (Recorded Investment In Nonaccrual Restructured And Loans Past Due 90 Days Or More And Accruing) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	$ 100,471	$ 135,216
Accruing restructured loans	17,212	18,809
Loans past due 90 days or more and accruing	1,831	1,727
Total nonperforming loans	119,514	155,752
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	22,462	20,633
Accruing restructured loans	781	107
Loans past due 90 days or more and accruing	0	80
Total nonperforming loans	23,243	20,820
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	2,097	4,777
Accruing restructured loans	0	0
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	2,097	4,777
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	5,915	10,476
Accruing restructured loans	55	306
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	5,970	10,782
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	77	87
Accruing restructured loans	94	97
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	171	184
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	22	39
Accruing restructured loans	151	192
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	173	231
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	23,224	32,495
Accruing restructured loans	416	913
Loans past due 90 days or more and accruing	0
Total nonperforming loans	23,640	33,408
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	19,758	20,564
Accruing restructured loans	11,623	11,708
Loans past due 90 days or more and accruing	842	549
Total nonperforming loans	32,223	32,821
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,786	2,129
Accruing restructured loans	711	751
Loans past due 90 days or more and accruing	0	0
Total nonperforming loans	2,497	2,880
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	1,742	965
Accruing restructured loans	965	885
Loans past due 90 days or more and accruing	35	80
Total nonperforming loans	2,742	1,930
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	20,292	39,588
Accruing restructured loans	1,011	2,234
Loans past due 90 days or more and accruing	0	2
Total nonperforming loans	21,303	41,824
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans	3,096	3,463
Accruing restructured loans	1,405	1,616
Loans past due 90 days or more and accruing	954	1,016
Total nonperforming loans	$ 5,455	$ 6,095