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Loans (Recorded Investment By Loan Grade) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | $ 4,415,655 |  | $ 4,331,783 |
Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 396,783 |  | 396,929 |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 1,085,974 | [1] | 1,112,809 | [1]
Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 3,486 |  | 2,102 |
5 Rated [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 57,292 |  | 76,434 |
5 Rated [Member] | SEPH Commercial Land and Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 893 | [2] |  |
5 Rated [Member] | Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  | 3,102 | [3]
5 Rated [Member] | Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 7,903 |  | 6,982 |
5 Rated [Member] | Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 10,964 |  | 17,120 |
5 Rated [Member] | Commercial, Financial, and Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 5,655 | [2] | 11,785 | [3]
5 Rated [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 31,877 | [2] | 37,445 | [3]
5 Rated [Member] | Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  |  |
6 Rated [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 20,427 |  | 30,184 |
6 Rated [Member] | SEPH Commercial Land and Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  | [2] |  |
6 Rated [Member] | Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  |  | [3]
6 Rated [Member] | Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  | 8,311 |
6 Rated [Member] | Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 1,327 |  | 3,785 |
6 Rated [Member] | Commercial, Financial, and Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 12,942 | [2] | 7,628 | [3]
6 Rated [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 6,158 | [2] | 10,460 | [3]
6 Rated [Member] | Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  |  |
Impaired [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 143,058 |  | 188,572 |
Impaired [Member] | SEPH Commercial Land and Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 13,965 | [2] |  |
Impaired [Member] | Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  | 25,761 | [3]
Impaired [Member] | Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 27,418 |  | 25,912 |
Impaired [Member] | Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 36,583 |  | 44,276 |
Impaired [Member] | Commercial, Financial, and Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 22,114 | [2] | 40,645 | [3]
Impaired [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 42,978 | [2] | 51,978 | [3]
Impaired [Member] | Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  |  |
Pass Rated [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 2,196,496 |  | 2,151,649 |
Pass Rated [Member] | SEPH Commercial Land and Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 968 | [2] |  |
Pass Rated [Member] | Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment |  |  | 2,771 | [3]
Pass Rated [Member] | Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 103,726 |  | 115,242 |
Pass Rated [Member] | Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 347,909 |  | 331,748 |
Pass Rated [Member] | Commercial, Financial, and Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 735,446 | [2] | 686,860 | [3]
Pass Rated [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 1,004,961 | [2] | 1,012,926 | [3]
Pass Rated [Member] | Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Total ending loan balance, recorded investment | 3,486 |  | 2,102 |
Recorded Investment [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 2,417,273 |  | 2,446,839 |
Recorded Investment [Member] | SEPH Commercial Land and Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 15,826 | [2] |  |
Recorded Investment [Member] | Vision Commercial Land And Development [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment |  |  | 31,634 | [3]
Recorded Investment [Member] | Remaining Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 139,047 |  | 156,447 |
Recorded Investment [Member] | Residential Real Estate - Commercial [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 396,783 |  | 396,929 |
Recorded Investment [Member] | Commercial, Financial, and Agricultural [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 776,157 | [2] | 746,918 | [3]
Recorded Investment [Member] | Commercial Real Estate [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | 1,085,974 | [2] | 1,112,809 | [3]
Recorded Investment [Member] | Leases [Member] |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans and Leases Receivable, Recorded Investment | $ 3,486 |  | $ 2,102 |
[1] | Included within commercial, financial and agricultural loans, commercial real estate loans, and Vision/SEPH commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.
[2] | * Included within commercial, financial and agricultural loans, commercial real estate loans, and SEPH commercial land and development loans is an immaterial amount of consumer loans that are not broken out by class.
[3] | * Included within commercial, financial and agricultural loans, commercial real estate loans, and Vision 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, Recorded Investment + References No definition available. + 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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