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Loans (Composition Of Loan Portfolio By Class Of Loan) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | $ 4,317,099 |  | $ 4,732,685 |
Accrued interest receivable | 14,684 |  | 17,505 |
Total recorded investment | 4,331,783 |  | 4,750,190 |
Commercial, Financial And Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 743,797 | [1] | 737,902 | [1]
Accrued interest receivable | 3,121 | [1] | 2,886 | [1]
Total recorded investment | 746,918 | [1] | 740,788 | [1]
Construction Real Estate - Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 31,603 | [1] | 171,334 | [1]
Accrued interest receivable | 31 | [1] | 282 | [1]
Total recorded investment | 31,634 | [1] | 171,616 | [1]
Construction Real Estate - Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 156,053 |  | 195,693 |
Accrued interest receivable | 394 |  | 622 |
Total recorded investment | 156,447 |  | 196,315 |
Construction Real Estate - Mortgage [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 20,039 |  | 26,326 |
Accrued interest receivable | 64 |  | 95 |
Total recorded investment | 20,103 |  | 26,421 |
Construction Real Estate - Installment [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 9,851 |  | 13,127 |
Accrued interest receivable | 61 |  | 54 |
Total recorded investment | 9,912 |  | 13,181 |
Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 395,824 |  | 464,903 |
Accrued interest receivable | 1,105 |  | 1,403 |
Total recorded investment | 396,929 |  | 466,306 |
Residential Real Estate - Mortgage [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 953,758 |  | 906,648 |
Accrued interest receivable | 1,522 |  | 2,789 |
Total recorded investment | 955,280 |  | 909,437 |
Residential Real Estate - HELOC [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 227,682 |  | 260,463 |
Accrued interest receivable | 942 |  | 1,014 |
Total recorded investment | 228,624 |  | 261,477 |
Residential Real Estate - Installment [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 51,354 |  | 60,195 |
Accrued interest receivable | 236 |  | 255 |
Total recorded investment | 51,590 |  | 60,450 |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 1,108,574 | [1] | 1,226,616 | [1]
Accrued interest receivable | 4,235 | [1] | 4,804 | [1]
Total recorded investment | 1,112,809 | [1] | 1,231,420 | [1]
Consumer [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 616,505 |  | 666,871 |
Accrued interest receivable | 2,930 |  | 3,245 |
Total recorded investment | 619,435 |  | 670,116 |
Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loan balance | 2,059 |  | 2,607 |
Accrued interest receivable | 43 |  | 56 |
Total recorded investment | $ 2,102 |  | $ 2,663 |
[1] | 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 Total of loans held-for-sale and held-in-portfolio net of unearned income, unamortized loan origination and other fees and costs, and purchased premiums or discounts. + 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 Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 8 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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