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Note 7 - Loans (Details) - Aging of Loan Portfolio (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Type of Loans: |  |
Loans, 30-59 Days Past Due | $ 9,054 | $ 30,821
Loans, 60-89 Days Past Due | 6,403 | 25,256
Loans, Greater than 90 Days Past Due | 662 | 982
Non-accrual Loans | 65,258 | 83,183
Loans, Past Due | 81,377 | 140,242
Loans, Not Past Due | 8,776,877 | 7,944,321
Loans | 8,858,254 | 8,084,563
Commercial Loans [Member] |  |
Type of Loans: |  |
Loans, 30-59 Days Past Due | 8,307 | 7,170
Loans, 60-89 Days Past Due | 3,920 | 16,562
Loans, Greater than 90 Days Past Due | 662 |
Non-accrual Loans | 8,851 | 21,232
Loans, Past Due | 21,740 | 44,964
Loans, Not Past Due | 2,428,378 | 2,253,760
Loans | 2,450,118 | 2,298,724
Real Estate Construction Loans [Member] |  |
Type of Loans: |  |
Non-accrual Loans | 25,728 | 28,586
Loans, Past Due | 25,728 | 28,586
Loans, Not Past Due | 275,731 | 193,115
Loans | 301,459 | 221,701
Commercial Mortgage Loans [Member] |  |
Type of Loans: |  |
Loans, 30-59 Days Past Due | 171 | 20,043
Loans, 60-89 Days Past Due | 1,676 | 7,862
Loans, Greater than 90 Days Past Due |  | 982
Non-accrual Loans | 23,830 | 19,621
Loans, Past Due | 25,677 | 48,508
Loans, Not Past Due | 4,388,390 | 3,974,543
Loans | 4,414,067 | 4,023,051
Residential Mortgage And Equity Lines Member |  |
Type of Loans: |  |
Loans, 30-59 Days Past Due | 408 | 3,508
Loans, 60-89 Days Past Due | 807 | 832
Non-accrual Loans | 6,849 | 13,744
Loans, Past Due | 8,064 | 18,084
Loans, Not Past Due | 1,680,870 | 1,508,448
Loans | 1,688,934 | 1,526,532
Installment And Other Loans [Member] |  |
Type of Loans: |  |
Loans, 30-59 Days Past Due | 168 | 100
Loans, Past Due | 168 | 100
Loans, Not Past Due | 3,508 | 14,455
Loans | $ 3,676 | $ 14,555

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- Definition Financing Receivable Recorded Investment Not In Past Due + References No definition available. + Details
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- Definition Financing receivables that are less than 60 days past due but more than 29 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are less than 90 days past due but more than 59 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + 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=28367877&loc=d3e4428-111522 + Details
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