Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014 contracts		Sep. 30, 2013 contracts	Sep. 30, 2014 contracts		Sep. 30, 2013 contracts	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	121		112	332		373
Accruing loans past due 30-89 days	$ 34,470			$ 34,470			$ 31,815
Past due nonaccrual loans and loans past due 90 days or more and accruing	56,975	[1]		56,975	[1]		61,610	[2]
Total loans past due	91,445			91,445			93,425
Total current	4,692,931			4,692,931			4,538,908
Recorded Investment	4,784,376			4,784,376			4,632,333
Loans past due 90 days or more and accruing	1,831			1,831			1,727
Financing Receivable, Modifications, Recorded Investment, During Period	4,529		10,532	6,853		18,101
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	14		7	24		21
Accruing loans past due 30-89 days	7,814			7,814			1,233
Past due nonaccrual loans and loans past due 90 days or more and accruing	8,640	[1]		8,640	[1]		13,275	[2]
Total loans past due	16,454			16,454			14,508
Total current	796,240			796,240			814,003
Loans past due 90 days or more and accruing	0			0			80
Financing Receivable, Modifications, Recorded Investment, During Period	1,801		3,484	1,841		3,865
Construction Real Estate - SEPH Commercial Land And Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	0			0
Past due nonaccrual loans and loans past due 90 days or more and accruing	2,071	[1]		2,071	[1]		4,242	[2]
Total loans past due	2,071			2,071			4,242
Total current	160			160			1,606
Recorded Investment	2,231	[3]		2,231	[3]		5,848	[3]
Loans past due 90 days or more and accruing	0			0			0
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	0		0	2		2
Accruing loans past due 30-89 days
Past due nonaccrual loans and loans past due 90 days or more and accruing	147	[1]		147	[1]		3,463	[2]
Total loans past due	147			147			3,463
Total current	128,608			128,608			107,642
Recorded Investment	128,755			128,755			111,105
Loans past due 90 days or more and accruing	0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period				207		403
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	526			526			264
Past due nonaccrual loans and loans past due 90 days or more and accruing	77	[1]		77	[1]		75	[2]
Total loans past due	603			603			339
Total current	31,614			31,614			31,639
Recorded Investment	32,217			32,217			31,978
Loans past due 90 days or more and accruing	0			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		1	1		3
Accruing loans past due 30-89 days	53			53			207
Past due nonaccrual loans and loans past due 90 days or more and accruing		[1]			[1]		14	[2]
Total loans past due	53			53			221
Total current	7,600			7,600			7,351
Recorded Investment	7,653			7,653			7,572
Loans past due 90 days or more and accruing	0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period			15			39
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	2		0	4		14
Accruing loans past due 30-89 days	525			525			900
Past due nonaccrual loans and loans past due 90 days or more and accruing	19,091	[1]		19,091	[1]		5,659	[2]
Total loans past due	19,616			19,616			6,559
Total current	390,418			390,418			401,732
Recorded Investment	410,034			410,034			408,291
Loans past due 90 days or more and accruing	0			0
Financing Receivable, Modifications, Recorded Investment, During Period	312			333		2,574
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	11		8	31		41
Accruing loans past due 30-89 days	12,629			12,629			13,633
Past due nonaccrual loans and loans past due 90 days or more and accruing	11,225	[1]		11,225	[1]		11,829	[2]
Total loans past due	23,854			23,854			25,462
Total current	1,152,941			1,152,941			1,119,185
Recorded Investment	1,176,795			1,176,795			1,144,647
Loans past due 90 days or more and accruing	842			842			549
Financing Receivable, Modifications, Recorded Investment, During Period	864		513	1,853		3,129
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	2		6	7		13
Accruing loans past due 30-89 days	644			644			571
Past due nonaccrual loans and loans past due 90 days or more and accruing	539	[1]		539	[1]		402	[2]
Total loans past due	1,183			1,183			973
Total current	217,153			217,153			213,462
Recorded Investment	218,336			218,336			214,435
Loans past due 90 days or more and accruing	0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period	29		129	288		222
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	461			461			696
Past due nonaccrual loans and loans past due 90 days or more and accruing	593	[1]		593	[1]		436	[2]
Total loans past due	1,054			1,054			1,132
Total current	28,537			28,537			32,841
Recorded Investment	29,591			29,591			33,973
Loans past due 90 days or more and accruing	35			35			80
Financing Receivable, Modifications, Recorded Investment, During Period	142		93	240		193
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		0
Financing Receivable, Modifications, Recorded Investment, During Period
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment	812,694	[3]		812,694	[3]		828,511	[3]
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	2		9	8		16
Accruing loans past due 30-89 days	800			800			2,168
Past due nonaccrual loans and loans past due 90 days or more and accruing	11,110	[1]		11,110	[1]		18,274	[2]
Total loans past due	11,910			11,910			20,442
Total current	1,064,510			1,064,510			1,095,596
Recorded Investment	1,076,420	[3]		1,076,420	[3]		1,116,038	[3]
Loans past due 90 days or more and accruing	0			0			2
Financing Receivable, Modifications, Recorded Investment, During Period	622		5,671	905		6,635
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	87		76	246		251
Accruing loans past due 30-89 days	11,018			11,018			12,143
Past due nonaccrual loans and loans past due 90 days or more and accruing	3,482	[1]		3,482	[1]		3,941	[2]
Total loans past due	14,500			14,500			16,084
Total current	871,915			871,915			710,424
Recorded Investment	886,415			886,415			726,508
Loans past due 90 days or more and accruing	954			954			1,016
Financing Receivable, Modifications, Recorded Investment, During Period	759		627	1,186		1,041
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days	0			0			0
Past due nonaccrual loans and loans past due 90 days or more and accruing	0	[1]		0	[1]		0	[2]
Total loans past due	0			0			0
Total current	3,235			3,235			3,427
Recorded Investment	3,235			3,235			3,427
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period	3		5	9		12
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,832		3,541	2,572		5,838
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	776		2,806	776		2,813
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						403
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		15	0		15
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
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	508		120	749		1,513
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	0		129	93		222
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	133		52	228		118
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
Accruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	415		419	726		754
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	2,697		6,991	4,281		12,263
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	1,025		678	1,065		1,052
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				207
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						24
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	312			333		2,574
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	356		393	1,104		1,616
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	29		0	195		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		41	12		75
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
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	622		5,671	905		6,635
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	$ 344		$ 208	$ 460		$ 287

[1] Includes $1.8 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, 2013(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$1,233 $13,275 $14,508 $814,003 $828,511Commercial real estate2,168 18,274 20,442 1,095,596 1,116,038Construction real estate: SEPH commercial land and development— 4,242 4,242 1,606 5,848Remaining commercial— 3,463 3,463 107,642 111,105Mortgage264 75 339 31,639 31,978Installment207 14 221 7,351 7,572Residential real estate: Commercial900 5,659 6,559 401,732 408,291Mortgage13,633 11,829 25,462 1,119,185 1,144,647HELOC571 402 973 213,462 214,435Installment696 436 1,132 32,841 33,973Consumer12,143 3,941 16,084 710,424 726,508Leases— — — 3,427 3,427Total loans$31,815 $61,610 $93,425 $4,538,908 $4,632,333* Includes $1.7 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 $1.8 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.