Loans (Aging Of Recorded Investment In Past Due Loans) (Details) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2015 USD ($) contracts		Jun. 30, 2014 USD ($) contracts	Jun. 30, 2015 USD ($) contracts		Jun. 30, 2014 USD ($) contracts	Dec. 31, 2014 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		126		119	232		211
Accruing loans past due 30-89 days		$ 23,439			$ 23,439			$ 31,074
Past due nonaccrual loans and loans past due 90 days or more and accruing		37,789	[1]		37,789	[1]		52,932	[2]
Total loans past due		61,228			61,228			84,006
Total current		4,853,455			4,853,455			4,759,305
Recorded Investment		4,914,683			4,914,683			4,843,311
Loans past due 90 days or more and accruing		1,575			1,575			2,709
Financing Receivable, Modifications, Recorded Investment, During Period		$ 3,979		$ 2,892	$ 7,416		$ 4,153
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		12		5	25		10
Accruing loans past due 30-89 days		$ 558			$ 558			6,482
Past due nonaccrual loans and loans past due 90 days or more and accruing		4,055	[1]		4,055	[1]		7,508	[2]
Total loans past due		4,613			4,613			13,990
Total current		847,237			847,237			845,763
Loans past due 90 days or more and accruing		71			71			229
Financing Receivable, Modifications, Recorded Investment, During Period		1,789		$ 294	2,506		$ 352
Construction Real Estate, SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days		94			94
Past due nonaccrual loans and loans past due 90 days or more and accruing		2,043	[1]		2,043	[1]		2,068	[2]
Total loans past due		2,137			2,137			2,068
Total current		4			4			127
Recorded Investment	[3]	2,141			2,141			2,195
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 | contracts		0		2	0		2
Accruing loans past due 30-89 days		$ 41			$ 41			166
Past due nonaccrual loans and loans past due 90 days or more and accruing		84	[1]		84	[1]		77	[2]
Total loans past due		125			125			243
Total current		105,326			105,326			115,196
Recorded Investment		105,451			105,451			115,439
Loans past due 90 days or more and accruing		$ 0			$ 0			0
Financing Receivable, Modifications, Recorded Investment, During Period				$ 549			$ 208
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		0	1		0
Accruing loans past due 30-89 days		$ 15			$ 15			39
Past due nonaccrual loans and loans past due 90 days or more and accruing		30	[1]		30	[1]		68	[2]
Total loans past due		45			45			107
Total current		31,534			31,534			31,113
Recorded Investment		31,579			31,579			31,220
Loans past due 90 days or more and accruing		$ 30			30			9
Financing Receivable, Modifications, Recorded Investment, During Period					$ 20
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		1		1	1		1
Accruing loans past due 30-89 days		$ 98			$ 98			21
Past due nonaccrual loans and loans past due 90 days or more and accruing		79	[1]		79	[1]		25	[2]
Total loans past due		177			177			46
Total current		6,952			6,952			7,299
Recorded Investment		7,129			7,129			7,345
Loans past due 90 days or more and accruing		0			0			0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 20		$ 3	$ 21		$ 3
Residential Real Estate - Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		6		0	9		2
Accruing loans past due 30-89 days		$ 534			$ 534			250
Past due nonaccrual loans and loans past due 90 days or more and accruing		17,148	[1]		17,148	[1]		19,592	[2]
Total loans past due		17,682			17,682			19,842
Total current		400,419			400,419			398,808
Recorded Investment		418,101			418,101			418,650
Loans past due 90 days or more and accruing		0			0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 832			$ 1,266		$ 48
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		8		13	15		20
Accruing loans past due 30-89 days		$ 11,065			$ 11,065			11,146
Past due nonaccrual loans and loans past due 90 days or more and accruing		10,022	[1]		10,022	[1]		10,637	[2]
Total loans past due		21,087			21,087			21,783
Total current		1,190,340			1,190,340			1,169,474
Recorded Investment		1,211,427			1,211,427			1,191,257
Loans past due 90 days or more and accruing		719			719			1,329
Financing Receivable, Modifications, Recorded Investment, During Period		$ 541		$ 732	$ 1,069		$ 1,321
Residential Real Estate - HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		6		5	16		5
Accruing loans past due 30-89 days		$ 421			$ 421			262
Past due nonaccrual loans and loans past due 90 days or more and accruing		111	[1]		111	[1]		387	[2]
Total loans past due		532			532			649
Total current		213,568			213,568			217,069
Recorded Investment		214,100			214,100			217,718
Loans past due 90 days or more and accruing		34			34			9
Financing Receivable, Modifications, Recorded Investment, During Period		74		$ 276	342		$ 276
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing loans past due 30-89 days		656			656			596
Past due nonaccrual loans and loans past due 90 days or more and accruing		324	[1]		324	[1]		464	[2]
Total loans past due		980			980			1,060
Total current		23,813			23,813			26,176
Recorded Investment		24,793			24,793			27,236
Loans past due 90 days or more and accruing		0			0
Financing Receivable, Modifications, Recorded Investment, During Period		$ 57		$ 97	$ 57		$ 98
SEPH Commercial Land and Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		0	0		0
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment	[3]	$ 851,850			$ 851,850			859,753
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		0		3	6		6
Accruing loans past due 30-89 days		$ 563			$ 563			808
Past due nonaccrual loans and loans past due 90 days or more and accruing		1,080	[1]		1,080	[1]		8,288	[2]
Total loans past due		1,643			1,643			9,096
Total current		1,089,097			1,089,097			1,064,087
Recorded Investment	[3]	1,090,740			1,090,740			1,073,183
Loans past due 90 days or more and accruing		$ 0			0
Financing Receivable, Modifications, Recorded Investment, During Period				$ 315	$ 1,291		$ 996
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		90		88	156		159
Accruing loans past due 30-89 days		$ 9,394			$ 9,394			11,304
Past due nonaccrual loans and loans past due 90 days or more and accruing		2,813	[1]		2,813	[1]		3,818	[2]
Total loans past due		12,207			12,207			15,122
Total current		942,032			942,032			881,005
Recorded Investment		954,239			954,239			896,127
Loans past due 90 days or more and accruing		721			721			1,133
Financing Receivable, Modifications, Recorded Investment, During Period		666		$ 626	844		$ 851
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		3,133			3,133			3,188
Recorded Investment		$ 3,133			$ 3,133			$ 3,188
Residential Real Estate - Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Number of Contracts, During Period | contracts		3		2	3		6
Accruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 1,012		$ 918	$ 1,753		$ 1,380
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		896			1,107		158
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 - Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		39		357	365		457
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		37		108	228		108
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				93			95
Accruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		40		360	53		562
Nonaccruing Financing Receivable Modifications [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		2,967		1,974	5,663		2,773
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		893		294	1,399		194
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				549			208
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					20
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		20		3	21		3
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		832			1,266		48
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		502		375	704		864
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		37		168	114		168
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		57		4	57		3
Nonaccruing Financing Receivable Modifications [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period				315	1,291		996
Nonaccruing Financing Receivable Modifications [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period		$ 626		$ 266	$ 791		$ 289

[1] Includes $1.6 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 $2.7 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.