Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	$ 31,738		$ 37,517
Past due nonaccrual loans and loans past due 90 days or more and accruing	91,922	[1]	94,663	[2]
Total loans past due	123,660		132,180
Total current	4,277,283		4,199,603
Recorded Investment	4,400,943		4,331,783
Loans past due 90 days or more and accruing	1,915		3,561
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	1,936		3,106
Past due nonaccrual loans and loans past due 90 days or more and accruing	27,719	[1]	11,308	[2]
Total loans past due	29,655		14,414
Total current	745,525		732,504
Recorded Investment	775,180		746,918
Loans past due 90 days or more and accruing	2
Construction Real Estate - Vision/SEPH LLC Commercial Land And Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days
Past due nonaccrual loans and loans past due 90 days or more and accruing	14,820	[1]	19,235	[2]
Total loans past due	14,820		19,235
Total current	6,185		12,399
Recorded Investment	21,005	[3]	31,634	[3]
Loans past due 90 days or more and accruing	0
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	147		99
Past due nonaccrual loans and loans past due 90 days or more and accruing	4,991	[1]	7,839	[2]
Total loans past due	5,138		7,938
Total current	139,042		148,509
Recorded Investment	144,180		156,447
Loans past due 90 days or more and accruing	0
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	61		76
Past due nonaccrual loans and loans past due 90 days or more and accruing	86	[1]		[2]
Total loans past due	147		76
Total current	22,880		20,027
Recorded Investment	23,027		20,103
Loans past due 90 days or more and accruing	86
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	172		421
Past due nonaccrual loans and loans past due 90 days or more and accruing	24	[1]	8	[2]
Total loans past due	196		429
Total current	8,827		9,483
Recorded Investment	9,023		9,912
Loans past due 90 days or more and accruing	8
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	1,326		1,545
Past due nonaccrual loans and loans past due 90 days or more and accruing	8,228	[1]	10,097	[2]
Total loans past due	9,554		11,642
Total current	383,751		385,287
Recorded Investment	393,305		396,929
Loans past due 90 days or more and accruing	0
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	14,575		15,879
Past due nonaccrual loans and loans past due 90 days or more and accruing	16,805	[1]	20,614	[2]
Total loans past due	31,380		36,493
Total current	1,009,469		918,787
Recorded Investment	1,040,849		955,280
Loans past due 90 days or more and accruing	1,045		2,610
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	635		1,015
Past due nonaccrual loans and loans past due 90 days or more and accruing	351	[1]	436	[2]
Total loans past due	986		1,451
Total current	218,985		227,173
Recorded Investment	219,971		228,624
Loans past due 90 days or more and accruing	0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	756		1,549
Past due nonaccrual loans and loans past due 90 days or more and accruing	578	[1]	1,136	[2]
Total loans past due	1,334		2,685
Total current	45,920		48,905
Recorded Investment	47,254		51,590
Loans past due 90 days or more and accruing	159		58
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	3,144		2,632
Past due nonaccrual loans and loans past due 90 days or more and accruing	16,456	[1]	21,798	[2]
Total loans past due	19,600		24,430
Total current	1,077,988		1,088,379
Recorded Investment	1,097,588	[3]	1,112,809	[3]
Loans past due 90 days or more and accruing	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	8,986		11,195
Past due nonaccrual loans and loans past due 90 days or more and accruing	1,854	[1]	2,192	[2]
Total loans past due	10,840		13,387
Total current	615,152		606,048
Recorded Investment	625,992		619,435
Loans past due 90 days or more and accruing	615		893
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days
Past due nonaccrual loans and loans past due 90 days or more and accruing	10	[1]		[2]
Total loans past due	10
Total current	3,559		2,102
Recorded Investment	$ 3,569		$ 2,102

[1] Includes $1.9 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans. December 31, 2011(in thousands)Accruing loanspast due 30-89days Past duenonaccrual loans and loans pastdue 90 days ormore andaccruing* Total past due Total current Total recordedinvestmentCommercial, financial and agricultural$3,106 $11,308 $14,414 $732,504 $746,918Commercial real estate2,632 21,798 24,430 1,088,379 1,112,809Construction real estate: Vision commercial land and development— 19,235 19,235 12,399 31,634Remaining commercial99 7,839 7,938 148,509 156,447Mortgage76 — 76 20,027 20,103Installment421 8 429 9,483 9,912Residential real estate: Commercial1,545 10,097 11,642 385,287 396,929Mortgage15,879 20,614 36,493 918,787 955,280HELOC1,015 436 1,451 227,173 228,624Installment1,549 1,136 2,685 48,905 51,590Consumer11,195 2,192 13,387 606,048 619,435Leases— — — 2,102 2,102Total loans$37,517 $94,663 $132,180 $4,199,603 $4,331,783* Includes $3.6 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans.

[2] * Includes $1.9 million of loans past due 90 days or more and accruing.

[3] Included within commercial, financial and agricultural loans, commercial real estate loans, and Vision/SEPH commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.