Loans (Loans Individually Evaluated For Impairment By Class Of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 160,200	$ 175,578
Recorded investment	105,873	112,315	130,303
Allowance for loan losses allocated	11,322	10,451
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	19,835		21,742
Commercial Financial And Agricultural [Member] \| Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	22,101	22,429
Recorded investment	12,659	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	11,982	12,616
Recorded investment	7,176	7,842
Allowance for loan losses allocated	3,064	3,268
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	4,102		10,482
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	17,493	23,722
Recorded investment	4,102	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	10,530		20,483
Construction Real Estate - Remaining Commercial [Member] \| Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,248	8,429
Recorded investment	3,694	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	6,835	3,909
Recorded investment	6,836	3,910
Allowance for loan losses allocated	2,304	1,132
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	31,213		36,722
Residential Real Estate - Commercial [Member] \| Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	33,875	36,709
Recorded investment	29,258	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	2,126	2,129
Recorded investment	1,955	1,947
Allowance for loan losses allocated	440	555
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	39,395		40,075
Commercial Real Estate [Member] \| Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	51,428	56,870
Recorded investment	31,257	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	8,313	7,966
Recorded investment	8,138	7,673
Allowance for loan losses allocated	5,514	5,496
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	798		799
Consumer [Member] \| Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	799	799
Recorded investment	798	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	0	0
Recorded investment	0	0
Allowance for loan losses allocated	$ 0	$ 0