Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 154,396	$ 175,578
Recorded investment	96,005	112,315	126,102
Allowance for loan losses allocated	6,343	10,451
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	17,628		20,154
Commercial Financial And Agricultural [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	22,223	22,429
Recorded investment	11,092	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	10,891	12,616
Recorded investment	6,536	7,842
Allowance for loan losses allocated	2,860	3,268
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	4,378		9,074
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	21,833	23,722
Recorded investment	4,378	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	9,954		18,535
Construction Real Estate - Remaining Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,281	8,429
Recorded investment	3,722	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	6,232	3,909
Recorded investment	6,232	3,910
Allowance for loan losses allocated	2,174	1,132
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	28,775		35,412
Residential Real Estate - Commercial [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	31,632	36,709
Recorded investment	26,834	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	2,002	2,129
Recorded investment	1,941	1,947
Allowance for loan losses allocated	447	555
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	35,138		42,128
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	50,559	56,870
Recorded investment	31,667	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	3,611	7,966
Recorded investment	3,471	7,673
Allowance for loan losses allocated	781	5,496
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	132		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	132	0
Recorded investment	132	0
Allowance for loan losses allocated	$ 81	$ 0