Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013 contracts		Jun. 30, 2012 contracts	Jun. 30, 2013 contracts		Jun. 30, 2012 contracts	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	151		27	261		74
Accruing loans past due 30-89 days	$ 28,798			$ 28,798			$ 40,325
Past due nonaccrual loans and loans past due 90 days or more and accruing	64,752	[1]		64,752	[1]		82,514	[2]
Total loans past due	93,550			93,550			122,839
Total current	4,431,287			4,431,287			4,341,070
Recorded Investment	4,524,837			4,524,837			4,463,909
Loans past due 90 days or more and accruing	1,545			1,545			3,030
Financing Receivable, Modifications, Recorded Investment, During Period	5,242		7,046	9,155		26,692
Commercial, Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	7		11	14		16
Accruing loans past due 30-89 days	852			852			6,251
Past due nonaccrual loans and loans past due 90 days or more and accruing	15,335	[1]		15,335	[1]		11,811	[2]
Total loans past due	16,187			16,187			18,062
Total current	793,706			793,706			808,841
Recorded Investment	809,893			809,893			826,903
Loans past due 90 days or more and accruing	0			0			37
Financing Receivable, Modifications, Recorded Investment, During Period	262		2,867	496		5,290
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							686
Past due nonaccrual loans and loans past due 90 days or more and accruing	7,477	[1]		7,477	[1]		11,314	[2]
Total loans past due	7,477			7,477			12,000
Total current	2,761			2,761			3,142
Recorded Investment	10,238	[3]		10,238	[3]		15,142	[3]
Loans past due 90 days or more and accruing	0			0
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	1		1	2		10
Accruing loans past due 30-89 days							3,652
Past due nonaccrual loans and loans past due 90 days or more and accruing	3,941	[1]		3,941	[1]		5,838	[2]
Total loans past due	3,941			3,941			9,490
Total current	109,783			109,783			106,314
Recorded Investment	113,724			113,724			115,804
Loans past due 90 days or more and accruing	0			0
Financing Receivable, Modifications, Recorded Investment, During Period	180		258	217		10,351
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	0		0	0		0
Accruing loans past due 30-89 days	223			223			171
Past due nonaccrual loans and loans past due 90 days or more and accruing	61	[1]		61	[1]		85	[2]
Total loans past due	284			284			256
Total current	24,361			24,361			26,198
Recorded Investment	24,645			24,645			26,454
Loans past due 90 days or more and accruing	0			0
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	0		0	2		0
Accruing loans past due 30-89 days	73			73			135
Past due nonaccrual loans and loans past due 90 days or more and accruing		[1]			[1]		40	[2]
Total loans past due	73			73			175
Total current	7,593			7,593			8,435
Recorded Investment	7,666			7,666			8,610
Loans past due 90 days or more and accruing	0			0
Financing Receivable, Modifications, Recorded Investment, During Period				25
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	8		2	14		5
Accruing loans past due 30-89 days	1,064			1,064			1,163
Past due nonaccrual loans and loans past due 90 days or more and accruing	5,730	[1]		5,730	[1]		5,917	[2]
Total loans past due	6,794			6,794			7,080
Total current	394,754			394,754			386,082
Recorded Investment	401,548			401,548			393,162
Loans past due 90 days or more and accruing	0			0			94
Financing Receivable, Modifications, Recorded Investment, During Period	1,007		675	2,958		814
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	21		6	33		15
Accruing loans past due 30-89 days	12,267			12,267			11,948
Past due nonaccrual loans and loans past due 90 days or more and accruing	13,548	[1]		13,548	[1]		17,370	[2]
Total loans past due	25,815			25,815			29,318
Total current	1,068,087			1,068,087			1,036,868
Recorded Investment	1,093,902			1,093,902			1,066,186
Loans past due 90 days or more and accruing	739			739			950
Financing Receivable, Modifications, Recorded Investment, During Period	1,614		1,338	2,731		2,601
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	3		0	7		0
Accruing loans past due 30-89 days	442			442			620
Past due nonaccrual loans and loans past due 90 days or more and accruing	604	[1]		604	[1]		309	[2]
Total loans past due	1,046			1,046			929
Total current	209,697			209,697			212,868
Recorded Investment	210,743			210,743			213,797
Loans past due 90 days or more and accruing	0			0
Financing Receivable, Modifications, Recorded Investment, During Period	28		0	91		0
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	427			427			563
Past due nonaccrual loans and loans past due 90 days or more and accruing	314	[1]		314	[1]		787	[2]
Total loans past due	741			741			1,350
Total current	37,849			37,849			42,576
Recorded Investment	38,590			38,590			43,926
Loans past due 90 days or more and accruing	0			0			54
Financing Receivable, Modifications, Recorded Investment, During Period	59		169	105		170
SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	0		0	0		4
Financing Receivable, Modifications, Recorded Investment, During Period						862
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	5		4	7		20
Accruing loans past due 30-89 days	2,982			2,982			2,212
Past due nonaccrual loans and loans past due 90 days or more and accruing	14,095	[1]		14,095	[1]		26,355	[2]
Total loans past due	17,077			17,077			28,567
Total current	1,099,863			1,099,863			1,067,436
Recorded Investment	1,116,940	[3]		1,116,940	[3]		1,096,003	[3]
Loans past due 90 days or more and accruing	0			0			1,007
Financing Receivable, Modifications, Recorded Investment, During Period	1,502		1,739	1,678		6,513
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	103		0	175		1
Accruing loans past due 30-89 days	10,468			10,468			12,924
Past due nonaccrual loans and loans past due 90 days or more and accruing	3,647	[1]		3,647	[1]		2,688	[2]
Total loans past due	14,115			14,115			15,612
Total current	679,571			679,571			639,153
Recorded Investment	693,686			693,686			654,765
Loans past due 90 days or more and accruing	806			806			888
Financing Receivable, Modifications, Recorded Investment, During Period	590			854		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]			[1]			[2]
Total loans past due
Total current	3,262			3,262			3,157
Recorded Investment	3,262			3,262			3,157
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	3		3	7		3
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,298		175	2,825		7,696
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	106		175	7		1,862
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	180			217		3,776
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	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	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				376
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	582		0	1,457		222
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	28		0	91		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	24			70
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		1,836
Accruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	378			582
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	3,944		6,871	6,330		18,996
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	156		2,692	489		3,428
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			258			6,575
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				25
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	1,007		675	2,582		814
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	1,032		1,338	1,274		2,379
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	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	35		169	35		170
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						862
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,502		1,739	1,653		4,677
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 212			$ 272		$ 91

[1] Includes $1.5 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans and accruing troubled debt restructurings. 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 troubled debt restructurings.

[2] * Includes $1.5 million of loans past due 90 days or more and accruing. The remaining are past due, nonaccrual loans and accruing troubled debt restructurings.

[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.