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Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 8,260 | $ 8,276
Nonaccrual and accruing restructured loans | 175,896 | 185,482
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 130,303 | 137,339
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 45,593 | 48,143
Partial Charge-Offs On Impaired Loans | 102,900 | 105,100
Commercial, Financial And Agricultural [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 21,753 | 22,601
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 21,742 | 22,587
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 11 | 14
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 11,133 | 13,939
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 10,482 | 13,260
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 651 | 679
Construction Real Estate - Remaining Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 20,483 | 21,574
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 20,483 | 21,574
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment |  |
Construction Real Estate - Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 245 | 258
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment |  |
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 245 | 258
Construction Real Estate - Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 300 | 324
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment |  |
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 300 | 324
Residential Real Estate - Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 36,722 | 35,622
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 36,722 | 35,622
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment |  |
Residential Real Estate - Mortgage [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 35,064 | 37,685
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment |  |
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 35,064 | 37,685
Residential Real Estate - HELOC [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 2,617 | 2,425
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment |  |
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 2,617 | 2,425
Residential Real Estate - Installment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual and accruing restructured loans | 2,221 | 2,450
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment |  |
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 2,221 | 2,450
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 648 | 1,540
Nonaccrual and accruing restructured loans | 40,075 | 44,278
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 40,075 | 44,278
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment |  |
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0
Nonaccrual and accruing restructured loans | 5,283 | 4,326
Nonaccrual and accruing restructured loans, loans individually evaluated for impairment | 799 | 18
Nonaccrual and accruing restructured loans, loans collectively evaluated for impairment | 4,484 | 4,308
Financing Receivable With No Related Allowance Recorded [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Partial Charge-Offs On Impaired Loans | $ 96,900 | $ 96,900

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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