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Loans (Aging Of Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | $ 39,571 |  | $ 49,393 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 135,318 | [1] | 209,546 | [2]
Total past due | 174,889 |  | 258,939 |
Total current | 4,520,955 |  | 4,491,251 |
Recorded investment | 4,695,844 |  | 4,750,190 |
Loans past due 90 days or more and accruing | 2,222 |  | 3,693 |
Commercial, Financial And Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 2,211 |  | 2,247 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 16,457 | [1] | 15,622 | [2]
Total past due | 18,668 |  | 17,869 |
Total current | 741,212 |  | 722,919 |
Recorded investment | 759,880 | [3] | 740,788 | [3]
Loans past due 90 days or more and accruing | 22 |  |  |
Construction Real Estate - Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 425 |  | 2,406 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 35,654 | [1] | 65,130 | [2]
Total past due | 36,079 |  | 67,536 |
Total current | 66,424 |  | 104,080 |
Recorded investment | 102,503 | [3] | 171,616 | [3]
Construction Real Estate - Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days |  |  | 141 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 17,807 | [1] | 19,687 | [2]
Total past due | 17,807 |  | 19,828 |
Total current | 146,140 |  | 176,487 |
Recorded investment | 163,947 |  | 196,315 |
Construction Real Estate - Mortgage [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 145 |  | 479 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 66 | [1] | 148 | [2]
Total past due | 211 |  | 627 |
Total current | 19,708 |  | 25,794 |
Recorded investment | 19,919 |  | 26,421 |
Construction Real Estate - Installment [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 202 |  | 235 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 69 | [1] | 399 | [2]
Total past due | 271 |  | 634 |
Total current | 14,801 |  | 12,547 |
Recorded investment | 15,072 |  | 13,181 |
Loans past due 90 days or more and accruing |  |  | 13 |
Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 1,264 |  | 3,281 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 17,295 | [1] | 26,845 | [2]
Total past due | 18,559 |  | 30,126 |
Total current | 439,387 |  | 436,180 |
Recorded investment | 457,946 |  | 466,306 |
Residential Real Estate - Mortgage [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 14,015 |  | 17,460 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 21,618 | [1] | 24,422 | [2]
Total past due | 35,633 |  | 41,882 |
Total current | 934,052 |  | 867,555 |
Recorded investment | 969,685 |  | 909,437 |
Loans past due 90 days or more and accruing | 1,237 |  | 2,175 |
Residential Real Estate - HELOC [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 539 |  | 1,396 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 673 | [1] | 667 | [2]
Total past due | 1,212 |  | 2,063 |
Total current | 253,208 |  | 259,414 |
Recorded investment | 254,420 |  | 261,477 |
Loans past due 90 days or more and accruing |  |  | 149 |
Residential Real Estate - Installment [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 1,428 |  | 1,018 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 499 | [1] | 892 | [2]
Total past due | 1,927 |  | 1,910 |
Total current | 49,395 |  | 58,540 |
Recorded investment | 51,322 |  | 60,450 |
Loans past due 90 days or more and accruing | 112 |  | 277 |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 9,543 |  | 9,521 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 23,119 | [1] | 53,269 | [2]
Total past due | 32,662 |  | 62,790 |
Total current | 1,223,338 |  | 1,168,630 |
Recorded investment | 1,256,000 | [3] | 1,231,420 | [3]
Loans past due 90 days or more and accruing |  |  | 20 |
Consumer [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days | 9,799 |  | 11,204 |
Past due nonaccrual loans and loans past due 90 days or more and accruing | 2,061 | [1] | 2,465 | [2]
Total past due | 11,860 |  | 13,669 |
Total current | 631,086 |  | 656,447 |
Recorded investment | 642,946 |  | 670,116 |
Loans past due 90 days or more and accruing | 851 |  | 1,059 |
Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Accruing loans past due 30-89 days |  |  | 5 |
Total past due |  |  | 5 |
Total current | 2,204 |  | 2,658 |
Recorded investment | 2,204 |  | 2,663 |
Loans past due 90 days or more and accruing |  |  |  |
[1] | Includes $2.2 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.

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- Definition Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans. + References No definition available. + Details
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- Definition The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Receivable -URI http://asc.fasb.org/extlink&oid=6953735 + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524 -Subparagraph (d) + Details
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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953401-111524 + Details
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