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Allowance For Loan Losses (Composition Of The Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011 | Mar. 31, 2011 | Dec. 31, 2010
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Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | $ 59,758 |  | $ 68,444 |  | $ 148,530 | $ 143,575
Loan balance | 4,324,383 |  | 4,317,099 |  |  |
Allowance for loan losses as a percentage of loan balance | 1.38% |  | 1.59% |  |  |
Recorded investment | 4,338,583 |  | 4,331,783 |  |  |
Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 9,505 |  | 15,935 |  |  |
Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 50,253 |  | 52,509 |  |  |
Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 179,293 |  | 187,135 |  |  |
Allowance for loan losses as a percentage of loan balance | 5.30% |  | 8.52% |  |  |
Recorded investment | 179,424 |  | 187,135 |  |  |
Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 4,145,090 |  | 4,129,964 |  |  |
Allowance for loan losses as a percentage of loan balance | 1.21% |  | 1.27% |  |  |
Recorded investment | 4,159,159 |  | 4,144,648 |  |  |
Commercial, Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 18,328 |  | 16,950 |  | 11,791 | 11,555
Loan balance | 752,392 |  | 743,797 |  |  |
Allowance for loan losses as a percentage of loan balance | 2.44% |  | 2.28% |  |  |
Recorded investment | 755,831 |  | 746,918 |  |  |
Commercial, Financial And Agricultural [Member] | Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 4,704 |  | 5,819 |  |  |
Commercial, Financial And Agricultural [Member] | Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 13,624 |  | 11,131 |  |  |
Commercial, Financial And Agricultural [Member] | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 40,210 |  | 40,621 |  |  |
Allowance for loan losses as a percentage of loan balance | 11.70% |  | 14.33% |  |  |
Recorded investment | 40,241 |  | 40,621 |  |  |
Commercial, Financial And Agricultural [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 712,182 |  | 703,176 |  |  |
Allowance for loan losses as a percentage of loan balance | 1.91% |  | 1.58% |  |  |
Recorded investment | 715,590 |  | 706,297 |  |  |
Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 12,006 |  | 15,539 |  | 25,220 | 24,369
Loan balance | 1,088,348 | [1] | 1,108,574 | [1] |  |
Allowance for loan losses as a percentage of loan balance | 1.10% |  | 1.40% |  |  |
Recorded investment | 1,092,143 | [1] | 1,112,809 | [1] |  |
Commercial Real Estate [Member] | Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 1,506 |  | 4,431 |  |  |
Commercial Real Estate [Member] | Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 10,500 |  | 11,108 |  |  |
Commercial Real Estate [Member] | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 43,265 |  | 51,978 |  |  |
Allowance for loan losses as a percentage of loan balance | 3.48% |  | 8.52% |  |  |
Recorded investment | 43,305 |  | 51,978 |  |  |
Commercial Real Estate [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 1,045,083 |  | 1,056,596 |  |  |
Allowance for loan losses as a percentage of loan balance | 1.00% |  | 1.05% |  |  |
Recorded investment | 1,048,838 |  | 1,060,831 |  |  |
Construction Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 9,747 |  | 14,433 |  | 71,835 | 70,462
Loan balance | 203,815 |  | 217,546 |  |  |
Allowance for loan losses as a percentage of loan balance | 4.78% |  | 6.63% |  |  |
Recorded investment | 204,388 |  | 218,096 |  |  |
Construction Real Estate [Member] | Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 2,096 |  | 3,414 |  |  |
Construction Real Estate [Member] | Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 7,651 |  | 11,019 |  |  |
Construction Real Estate [Member] | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 52,046 |  | 50,240 |  |  |
Allowance for loan losses as a percentage of loan balance | 4.03% |  | 6.80% |  |  |
Recorded investment | 52,106 |  | 50,240 |  |  |
Construction Real Estate [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 151,769 |  | 167,306 |  |  |
Allowance for loan losses as a percentage of loan balance | 5.04% |  | 6.59% |  |  |
Recorded investment | 152,282 |  | 167,856 |  |  |
Residential Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 13,868 |  | 15,692 |  | 32,415 | 30,259
Loan balance | 1,667,699 |  | 1,628,618 |  |  |
Allowance for loan losses as a percentage of loan balance | 0.83% |  | 0.96% |  |  |
Recorded investment | 1,671,460 |  | 1,632,423 |  |  |
Residential Real Estate [Member] | Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 1,199 |  | 2,271 |  |  |
Residential Real Estate [Member] | Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 12,669 |  | 13,421 |  |  |
Residential Real Estate [Member] | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 43,752 |  | 44,276 |  |  |
Allowance for loan losses as a percentage of loan balance | 2.74% |  | 5.13% |  |  |
Recorded investment | 43,752 |  | 44,276 |  |  |
Residential Real Estate [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 1,623,947 |  | 1,584,342 |  |  |
Allowance for loan losses as a percentage of loan balance | 0.78% |  | 0.85% |  |  |
Recorded investment | 1,627,708 |  | 1,588,147 |  |  |
Consumer [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 5,809 |  | 5,830 |  | 7,265 | 6,925
Loan balance | 610,180 |  | 616,505 |  |  |
Allowance for loan losses as a percentage of loan balance | 0.95% |  | 0.95% |  |  |
Recorded investment | 612,760 |  | 619,435 |  |  |
Consumer [Member] | Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans | 5,809 |  | 5,830 |  |  |
Consumer [Member] | Loans Individually Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 20 |  | 20 |  |  |
Recorded investment | 20 |  | 20 |  |  |
Consumer [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 610,160 |  | 616,485 |  |  |
Allowance for loan losses as a percentage of loan balance | 0.95% |  | 0.95% |  |  |
Recorded investment | 612,740 |  | 619,415 |  |  |
Leases [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses, Ending allowance balance attributed to loans |  |  |  |  | 4 | 5
Loan balance | 1,949 |  | 2,059 |  |  |
Recorded investment | 2,001 |  | 2,102 |  |  |
Leases [Member] | Loans Collectively Evaluated For Impairment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Loan balance | 1,949 |  | 2,059 |  |  |
Recorded investment | $ 2,001 |  | $ 2,102 |  |  |
[1] | Included within commercial, financial and agricultural loans, commercial real estate loans, and Vision/SE LLC commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.

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- Definition Loans And Leases Receivable Ratio Of Allowance For Loan Losses To Total Loans + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph a(ii) -Chapter V -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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