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Allowance For Loan Losses (Allowance Calculation At The Segment Level And Adjusted Beginning Balance For The Allowance For Credit Losses) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Average loans |  |  | $ 4,642,478 | $ 4,594,436
Beginning balance | 143,575 |  | 116,717 | 100,088
Transfer of loans at fair value | 219 |  |  |
Transfer of allowance to held for sale | 13,100 | [1] |  |
Charge-offs | 133,882 |  | 66,314 | 59,022
Recoveries | 8,798 |  | 6,092 | 6,830
Net Charge-offs | 125,084 |  | 60,222 | 52,192
Provision for loan losses | 63,272 |  | 87,080 | 68,821
Ending balance | 68,444 |  | 143,575 | 116,717
Ratio of net charge-offs to average loans |  |  | 1.30% | 1.14%
Ratio of allowance for loan losses to end of period loans |  |  | 3.03% | 2.52%
Commercial, Financial And Agricultural [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 11,555 |  |  |
Transfer of loans at fair value | 2 |  |  |
Transfer of allowance to held for sale | 1,184 | [1] |  |
Charge-offs | 18,350 |  | 8,484 | 10,047
Recoveries | 1,402 |  | 1,237 | 1,010
Net Charge-offs | 16,948 |  |  |
Provision for loan losses | 23,529 |  |  |
Ending balance | 16,950 |  | 11,555 |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 24,369 |  |  |
Transfer of loans at fair value | 150 |  |  |
Transfer of allowance to held for sale | 4,327 | [1] |  |
Charge-offs | 23,063 |  | 7,748 | 5,662
Recoveries | 1,825 |  | 850 | 771
Net Charge-offs | 21,238 |  |  |
Provision for loan losses | 16,885 |  |  |
Ending balance | 15,539 |  | 24,369 |
Construction Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 70,462 |  |  |
Transfer of loans at fair value | 63 |  |  |
Transfer of allowance to held for sale | 1,998 | [1] |  |
Charge-offs | 64,166 |  | 23,308 | 21,956
Recoveries | 1,463 |  | 813 | 1,322
Net Charge-offs | 62,703 |  |  |
Provision for loan losses | 8,735 |  |  |
Ending balance | 14,433 |  | 70,462 |
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 30,259 |  |  |
Transfer of loans at fair value | 4 |  |  |
Transfer of allowance to held for sale | 5,450 | [1] |  |
Charge-offs | 20,691 |  | 18,401 | 11,765
Recoveries | 1,719 |  | 1,429 | 1,723
Net Charge-offs | 18,972 |  |  |
Provision for loan losses | 9,859 |  |  |
Ending balance | 15,692 |  | 30,259 |
Consumer [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 6,925 |  |  |
Transfer of allowance to held for sale | 141 | [1] |  |
Charge-offs | 7,612 |  | 8,373 | 9,583
Recoveries | 2,385 |  | 1,763 | 2,001
Net Charge-offs | 5,227 |  |  |
Provision for loan losses | 4,273 |  |  |
Ending balance | 5,830 |  | 6,925 |
Leases [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Beginning balance | 5 |  |  |
Charge-offs |  |  |  | 9
Recoveries | 4 |  |  | 3
Net Charge-offs | (4) |  |  |
Provision for loan losses | $ (9) |  |  |
[1] | Transfer of allowance to held for sale was allocated on a pro-rata basis based on the outstanding balance of the loans held for sale.

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- Definition Allowance For Credit Losses Transfer Of Allowance To Held For Sale + References No definition available. + Details
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- Definition Allowance For Credit Losses Transfer Of Loans At Fair Value + References No definition available. + Details
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- Definition Average loans. + References No definition available. + Details
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- Definition Financing Receivables Allowance For Credit Losses Net Charge Offs + References No definition available. + Details
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- Definition Ratio of net charge-offs to average loans. + References No definition available. + Details
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- Definition Charge to expense for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(2) + Details
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- Definition Reduction to the allowance for credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(4) + Details
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- Definition Reduction to the allowance for credit losses related to financing receivables deemed uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 -Subparagraph (c)(3) + Details
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- Definition The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph a(ii) -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 Reference 3: 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 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 9 -Section 03 -Paragraph 7 -Subparagraph d Reference 6: 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 7: 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 + Details
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