Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 120,773	$ 175,578
Recorded investment	76,231	112,315	118,251
Allowance for loan losses allocated	4,120	10,451
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	23,186		19,871
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	28,139	22,429
Recorded investment	19,850	12,885
Allowance for loan losses allocated	0	0
Commercial Financial And Agricultural [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	7,504	12,616
Recorded investment	3,336	7,842
Allowance for loan losses allocated	1,652	3,268
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	2,097		6,489
Construction Real Estate - SEPH Commercial Land And Development [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	14,933	23,722
Recorded investment	2,097	4,777
Allowance for loan losses allocated	0	0
Construction Real Estate - SEPH Commercial Land And Development [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	0
Recorded investment	0
Allowance for loan losses allocated	0	0
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	5,970		15,606
Construction Real Estate - Remaining Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,542	8,429
Recorded investment	466	6,872
Allowance for loan losses allocated	0	0
Construction Real Estate - Remaining Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,504	3,909
Recorded investment	5,504	3,910
Allowance for loan losses allocated	1,951	1,132
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	23,640		34,477
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	25,980	36,709
Recorded investment	23,127	31,461
Allowance for loan losses allocated	0	0
Residential Real Estate - Commercial [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	536	2,129
Recorded investment	513	1,947
Allowance for loan losses allocated	230	555
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	21,303		41,009
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	35,478	56,870
Recorded investment	20,198	34,149
Allowance for loan losses allocated	0	0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,122	7,966
Recorded investment	1,105	7,673
Allowance for loan losses allocated	252	5,496
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	35		799
Consumer [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance		799
Recorded investment		799
Allowance for loan losses allocated	0	0
Consumer [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	35	0
Recorded investment	35	0
Allowance for loan losses allocated	$ 35	$ 0