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Note 5 - Loans (Detail) - Portfolio by Risk Rating (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Gross Loans | $ 7,429,147 | $ 7,059,212
Loans held for sale |  | 760
Pass [Member] | Commercial Loans Member |  |
Gross Loans | 1,944,989 | 1,689,842
Pass [Member] | Real Estate Construction Loans [Member] |  |
Gross Loans | 109,269 | 115,538
Pass [Member] | Commercial Mortgage Loans [Member] |  |
Gross Loans | 3,344,783 | 3,275,431
Pass [Member] | Residential Mortgage And Equity Lines Member |  |
Gross Loans | 1,322,768 | 1,149,225
Pass [Member] | Installment And Other Loans Member |  |
Gross Loans | 12,556 | 17,636
Pass [Member] | Total [Member] |  |
Gross Loans | 6,734,365 | 6,247,672
Pass [Member] |  |
Loans held for sale |  | 0
Special Mention [Member] | Commercial Loans Member |  |
Gross Loans | 76,776 | 64,290
Special Mention [Member] | Real Estate Construction Loans [Member] |  |
Gross Loans | 18,000 | 23,555
Special Mention [Member] | Commercial Mortgage Loans [Member] |  |
Gross Loans | 162,455 | 69,925
Special Mention [Member] | Residential Mortgage And Equity Lines Member |  |
Gross Loans | 816 | 4,439
Special Mention [Member] | Installment And Other Loans Member |  |
Gross Loans | 0 | 63
Special Mention [Member] | Total [Member] |  |
Gross Loans | 258,047 | 162,272
Special Mention [Member] |  |
Loans held for sale |  | 0
Substandard [Member] | Commercial Loans Member |  |
Gross Loans | 94,077 | 108,858
Substandard [Member] | Real Estate Construction Loans [Member] |  |
Gross Loans | 45,171 | 90,132
Substandard [Member] | Commercial Mortgage Loans [Member] |  |
Gross Loans | 261,214 | 403,541
Substandard [Member] | Residential Mortgage And Equity Lines Member |  |
Gross Loans | 16,084 | 33,160
Substandard [Member] | Installment And Other Loans Member |  |
Gross Loans | 0 | 0
Substandard [Member] | Total [Member] |  |
Gross Loans | 416,546 | 635,691
Substandard [Member] |  |
Loans held for sale |  | 260
Doubtful [Member] | Commercial Loans Member |  |
Gross Loans | 11,265 | 5,285
Doubtful [Member] | Real Estate Construction Loans [Member] |  |
Gross Loans | 8,510 | 8,147
Doubtful [Member] | Commercial Mortgage Loans [Member] |  |
Gross Loans | 0 | 0
Doubtful [Member] | Residential Mortgage And Equity Lines Member |  |
Gross Loans | 414 | 145
Doubtful [Member] | Installment And Other Loans Member |  |
Gross Loans | 0 | 0
Doubtful [Member] | Total [Member] |  |
Gross Loans | 20,189 | 13,577
Doubtful [Member] |  |
Loans held for sale |  | 500
Total [Member] | Commercial Loans Member |  |
Gross Loans | 2,127,107 | 1,868,275
Total [Member] | Real Estate Construction Loans [Member] |  |
Gross Loans | 180,950 | 237,372
Total [Member] | Commercial Mortgage Loans [Member] |  |
Gross Loans | 3,768,452 | 3,748,897
Total [Member] | Residential Mortgage And Equity Lines Member |  |
Gross Loans | 1,340,082 | 1,186,969
Total [Member] | Installment And Other Loans Member |  |
Gross Loans | 12,556 | 17,699
Total [Member] | Total [Member] |  |
Gross Loans | 7,429,147 | 7,059,212
Total [Member] |  |
Loans held for sale |  | 760
Commercial Loans Member |  |
Gross Loans | 2,127,107 | 1,868,275
Real Estate Construction Loans [Member] |  |
Gross Loans | 180,950 | 237,372
Commercial Mortgage Loans [Member] |  |
Gross Loans | 3,768,452 | 3,748,897
Residential Mortgage And Equity Lines Member |  |
Gross Loans | 1,340,082 | 1,186,969
Installment And Other Loans Member |  |
Gross Loans | 12,556 | 17,699
Total [Member] |  |
Gross Loans | $ 7,429,147 | $ 7,059,212

X
- 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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X
- Definition The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 65 -Paragraph 4, 5, 6, 7, 9, 12, 28, 29 -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 AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph d -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph a -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 65 -Paragraph 4 -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 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph h -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 35 -Paragraph 49 -URI http://asc.fasb.org/extlink&oid=16382521&loc=d3e3084-111518 Reference 8: 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(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6490209&loc=d3e48214-111002 + Details
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