Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 contracts		Mar. 31, 2012 contracts	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	110		47
Accruing loans past due 30-89 days	$ 29,136			$ 40,325
Past due nonaccrual loans and loans past due 90 days or more and accruing	75,811	[1]		82,514	[2]
Total loans past due	104,947			122,839
Total current	4,353,117			4,341,070
Recorded Investment	4,458,064			4,463,909
Loans past due 90 days or more and accruing	1,389			3,030
Financing Receivable, Modifications, Recorded Investment, During Period	4,308		20,008
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	7		5
Accruing loans past due 30-89 days	3,891			6,251
Past due nonaccrual loans and loans past due 90 days or more and accruing	16,030	[1]		11,811	[2]
Total loans past due	19,921			18,062
Total current	779,959			808,841
Recorded Investment	799,880			826,903
Loans past due 90 days or more and accruing	0			37
Financing Receivable, Modifications, Recorded Investment, During Period	320		2,039
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	773			686
Past due nonaccrual loans and loans past due 90 days or more and accruing	9,041	[1]		11,314	[2]
Total loans past due	9,814			12,000
Total current	2,497			3,142
Recorded Investment	12,311	[3]		15,142	[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]
Financing Receivable, Modifications, Number of Contracts, During Period	1		9
Accruing loans past due 30-89 days	334			3,652
Past due nonaccrual loans and loans past due 90 days or more and accruing	4,221	[1]		5,838	[2]
Total loans past due	4,555			9,490
Total current	111,319			106,314
Recorded Investment	115,874			115,804
Loans past due 90 days or more and accruing	0
Financing Receivable, Modifications, Recorded Investment, During Period	37		10,206
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	0		0
Accruing loans past due 30-89 days	356			171
Past due nonaccrual loans and loans past due 90 days or more and accruing	129	[1]		85	[2]
Total loans past due	485			256
Total current	24,111			26,198
Recorded Investment	24,596			26,454
Loans past due 90 days or more and accruing	44
Financing Receivable, Modifications, Recorded Investment, During Period
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	2		0
Accruing loans past due 30-89 days	77			135
Past due nonaccrual loans and loans past due 90 days or more and accruing		[1]		40	[2]
Total loans past due	77			175
Total current	8,009			8,435
Recorded Investment	8,086			8,610
Loans past due 90 days or more and accruing	0
Financing Receivable, Modifications, Recorded Investment, During Period	26
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	6		3
Accruing loans past due 30-89 days	937			1,163
Past due nonaccrual loans and loans past due 90 days or more and accruing	4,628	[1]		5,917	[2]
Total loans past due	5,565			7,080
Total current	395,843			386,082
Recorded Investment	401,408			393,162
Loans past due 90 days or more and accruing	0			94
Financing Receivable, Modifications, Recorded Investment, During Period	2,054		318
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	12		9
Accruing loans past due 30-89 days	11,165			11,948
Past due nonaccrual loans and loans past due 90 days or more and accruing	13,366	[1]		17,370	[2]
Total loans past due	24,531			29,318
Total current	1,041,359			1,036,868
Recorded Investment	1,065,890			1,066,186
Loans past due 90 days or more and accruing	544			950
Financing Receivable, Modifications, Recorded Investment, During Period	1,122		1,281
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	4		0
Accruing loans past due 30-89 days	344			620
Past due nonaccrual loans and loans past due 90 days or more and accruing	732	[1]		309	[2]
Total loans past due	1,076			929
Total current	210,766			212,868
Recorded Investment	211,842			213,797
Loans past due 90 days or more and accruing	0
Financing Receivable, Modifications, Recorded Investment, During Period	54		0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	444			563
Past due nonaccrual loans and loans past due 90 days or more and accruing	683	[1]		787	[2]
Total loans past due	1,127			1,350
Total current	40,240			42,576
Recorded Investment	41,367			43,926
Loans past due 90 days or more and accruing	33			54
Financing Receivable, Modifications, Recorded Investment, During Period	49
SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	0		4
Financing Receivable, Modifications, Recorded Investment, During Period			894
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	2		16
Accruing loans past due 30-89 days	2,502			2,212
Past due nonaccrual loans and loans past due 90 days or more and accruing	23,275	[1]		26,355	[2]
Total loans past due	25,777			28,567
Total current	1,087,222			1,067,436
Recorded Investment	1,112,999	[3]		1,096,003	[3]
Loans past due 90 days or more and accruing	0			1,007
Financing Receivable, Modifications, Recorded Investment, During Period	177		5,179
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	72		1
Accruing loans past due 30-89 days	8,313			12,924
Past due nonaccrual loans and loans past due 90 days or more and accruing	3,706	[1]		2,688	[2]
Total loans past due	12,019			15,612
Total current	648,321			639,153
Recorded Investment	660,340			654,765
Loans past due 90 days or more and accruing	768			888
Financing Receivable, Modifications, Recorded Investment, During Period	469		91
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		[1]			[2]
Total loans past due
Total current	3,471			3,157
Recorded Investment	3,471			3,157
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	4		0
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,861		12,253
Accruing Financing Receivable Modifications [Member] | Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			1,289
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	37		8,641
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0		0
Accruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0		0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	493
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	880		111
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	54		0
Accruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	40
Accruing Financing Receivable Modifications [Member] | SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period
Accruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	25		2,212
Accruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	332
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,447		7,755
Nonaccruing Financing Receivable Modifications [Member] | Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	320		750
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			1,565
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period
Nonaccruing Financing Receivable Modifications [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	26
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,561		318
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	242		1,170
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	0		0
Nonaccruing Financing Receivable Modifications [Member] | Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	9
Nonaccruing Financing Receivable Modifications [Member] | SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			894
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	152		2,967
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 137		$ 91

[1] Includes $1.4 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans and accruing TDRs. December 31, 2012(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$6,251 $11,811 $18,062 $808,841 $826,903Commercial real estate2,212 26,355 28,567 1,067,436 1,096,003Construction real estate: SEPH commercial land and development686 11,314 12,000 3,142 15,142Remaining commercial3,652 5,838 9,490 106,314 115,804Mortgage171 85 256 26,198 26,454Installment135 40 175 8,435 8,610Residential real estate: Commercial1,163 5,917 7,080 386,082 393,162Mortgage11,948 17,370 29,318 1,036,868 1,066,186HELOC620 309 929 212,868 213,797Installment563 787 1,350 42,576 43,926Consumer12,924 2,688 15,612 639,153 654,765Leases— — — 3,157 3,157Total loans$40,325 $82,514 $122,839 $4,341,070 $4,463,909* Includes $3.0 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans and accruing TDRs.

[2] * Includes $1.4 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans and accruing TDRs.

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