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Note 7 - Loans (Details) - Portfolio by Risk Rating (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | $ 7,832,013 | $ 7,429,147
Commercial Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 2,047,158 | 1,944,989
Commercial Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 84,776 | 76,776
Commercial Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 94,088 | 94,077
Commercial Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 11,880 | 11,265
Commercial Loans [Member] | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 2,237,902 | 2,127,107
Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 2,237,902 | 2,127,107
Real Estate Construction Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 151,696 | 109,269
Real Estate Construction Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 18,000
Real Estate Construction Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 34,676 | 45,171
Real Estate Construction Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 3,495 | 8,510
Real Estate Construction Loans [Member] | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 189,867 | 180,950
Real Estate Construction Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 189,867 | 180,950
Commercial Mortgage Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 3,543,731 | 3,344,783
Commercial Mortgage Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 137,183 | 162,455
Commercial Mortgage Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 240,434 | 261,214
Commercial Mortgage Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 0
Commercial Mortgage Loans [Member] | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 3,921,348 | 3,768,452
Commercial Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 3,921,348 | 3,768,452
Residential Mortgage And Equity Lines Member | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 1,453,498 | 1,322,768
Residential Mortgage And Equity Lines Member | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 816
Residential Mortgage And Equity Lines Member | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 14,149 | 16,084
Residential Mortgage And Equity Lines Member | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 414
Residential Mortgage And Equity Lines Member | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 1,467,647 | 1,340,082
Residential Mortgage And Equity Lines Member |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 1,467,647 | 1,340,082
Installment And Other Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 15,249 | 12,556
Installment And Other Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 0
Installment And Other Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 0
Installment And Other Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 0 | 0
Installment And Other Loans [Member] | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 15,249 | 12,556
Installment And Other Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 15,249 | 12,556
Total [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 7,211,332 | 6,734,365
Total [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 221,959 | 258,047
Total [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 383,347 | 416,546
Total [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 15,375 | 20,189
Total [Member] | Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | 7,832,013 | 7,429,147
Total [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Gross Loans | $ 7,832,013 | $ 7,429,147

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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=28367877&loc=d3e4428-111522 + Details
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