Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
Accruing loans past due 30-89 days	$ 41,574		$ 49,393
Past due nonaccrual loans and loans past due 90 days or more and accruing	158,261	[1]	209,546	[2]
Total loans past due	199,835		258,939
Total current	4,526,192		4,491,251
Total recorded investment	4,726,027		4,750,190
Loans past due 90 days or more and accruing	3,192		3,693
Commercial Real Estate [Member]
Accruing loans past due 30-89 days	3,106		9,521
Past due nonaccrual loans and loans past due 90 days or more and accruing	36,369	[1]	53,269	[2]
Total loans past due	39,475		62,790
Total current	1,222,592		1,168,630
Total recorded investment	1,262,067	[3]	1,231,420	[3]
Loans past due 90 days or more and accruing			20
Consumer [Member]
Accruing loans past due 30-89 days	9,313		11,204
Past due nonaccrual loans and loans past due 90 days or more and accruing	1,994	[1]	2,465	[2]
Total loans past due	11,307		13,669
Total current	642,881		656,447
Total recorded investment	654,188		670,116
Loans past due 90 days or more and accruing	629		1,059
Leases [Member]
Accruing loans past due 30-89 days			5
Total loans past due			5
Total current	2,312		2,658
Total recorded investment	2,312		2,663
Commercial, Financial And Agricultural [Member]
Accruing loans past due 30-89 days	6,007		2,247
Past due nonaccrual loans and loans past due 90 days or more and accruing	21,096	[1]	15,622	[2]
Total loans past due	27,103		17,869
Total current	731,316		722,919
Total recorded investment	758,419	[3]	740,788	[3]
Loans past due 90 days or more and accruing	25
Construction Real Estate - Vision Commercial Land And Development [Member]
Accruing loans past due 30-89 days	309		2,406
Past due nonaccrual loans and loans past due 90 days or more and accruing	41,860	[1]	65,130	[2]
Total loans past due	42,169		67,536
Total current	69,120		104,080
Total recorded investment	111,289	[3]	171,616	[3]
Construction Real Estate - Remaining Commercial [Member]
Accruing loans past due 30-89 days	99		141
Past due nonaccrual loans and loans past due 90 days or more and accruing	13,757	[1]	19,687	[2]
Total loans past due	13,856		19,828
Total current	168,019		176,487
Total recorded investment	181,875		196,315
Construction Real Estate - Mortgage [Member]
Accruing loans past due 30-89 days	402		479
Past due nonaccrual loans and loans past due 90 days or more and accruing			148	[2]
Total loans past due	402		627
Total current	21,034		25,794
Total recorded investment	21,436		26,421
Construction Real Estate - Installment [Member]
Accruing loans past due 30-89 days	393		235
Past due nonaccrual loans and loans past due 90 days or more and accruing	386	[1]	399	[2]
Total loans past due	779		634
Total current	15,784		12,547
Total recorded investment	16,563		13,181
Loans past due 90 days or more and accruing			13
Residential Real Estate - Commercial [Member]
Accruing loans past due 30-89 days	3,014		3,281
Past due nonaccrual loans and loans past due 90 days or more and accruing	18,461	[1]	26,845	[2]
Total loans past due	21,475		30,126
Total current	434,742		436,180
Total recorded investment	456,217		466,306
Loans past due 90 days or more and accruing	861
Residential Real Estate - Mortgage [Member]
Accruing loans past due 30-89 days	17,041		17,460
Past due nonaccrual loans and loans past due 90 days or more and accruing	22,893	[1]	24,422	[2]
Total loans past due	39,934		41,882
Total current	912,619		867,555
Total recorded investment	952,553		909,437
Loans past due 90 days or more and accruing	1,676		2,175
Residential Real Estate - HELOC [Member]
Accruing loans past due 30-89 days	770		1,396
Past due nonaccrual loans and loans past due 90 days or more and accruing	664	[1]	667	[2]
Total loans past due	1,434		2,063
Total current	254,393		259,414
Total recorded investment	255,827		261,477
Loans past due 90 days or more and accruing			149
Residential Real Estate - Installment [Member]
Accruing loans past due 30-89 days	1,120		1,018
Past due nonaccrual loans and loans past due 90 days or more and accruing	781	[1]	892	[2]
Total loans past due	1,901		1,910
Total current	51,380		58,540
Total recorded investment	53,281		60,450
Loans past due 90 days or more and accruing	$ 1		$ 277

[1] Includes $3.2 million of loans past due 90 days or more and accruing.

[2] Includes $3.6 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 commercial land and development loans are an immaterial amount of consumer loans that are not broken out by class.