Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 214,871	$ 242,345
Recorded investment	126,102	137,339	169,690
Allowance for loan losses allocated	7,466	8,276
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	20,154		41,591
Commercial, Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	20,857	23,782
Recorded investment	12,175	14,683
Allowance for loan losses allocated
Commercial, Financial And Agricultural [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	12,672	12,268
Recorded investment	7,979	7,904
Allowance for loan losses allocated	3,210	3,180
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	9,074		17,272
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	47,400	56,075
Recorded investment	9,074	12,740
Allowance for loan losses allocated
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance		1,271
Recorded investment		520
Allowance for loan losses allocated
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	18,535		29,562
Construction Real Estate - Remaining Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	21,621	29,328
Recorded investment	9,356	14,093
Allowance for loan losses allocated
Construction Real Estate - Remaining Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	10,824	8,071
Recorded investment	9,179	7,481
Allowance for loan losses allocated	2,580	2,277
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	35,412		37,277
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	30,014	39,918
Recorded investment	31,455	31,957
Allowance for loan losses allocated
Residential Real Estate - Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	4,979	3,944
Recorded investment	3,957	3,665
Allowance for loan losses allocated	973	1,279
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	42,128		43,969
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	62,272	56,258
Recorded investment	39,013	35,097
Allowance for loan losses allocated
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	3,433	11,412
Recorded investment	3,115	9,181
Allowance for loan losses allocated	703	1,540
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	799		19
Consumer [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	799	18
Recorded investment	799	18
Allowance for loan losses allocated
Consumer [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance
Recorded investment
Allowance for loan losses allocated