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Note 5 - Loans (Details) - Aging of Loan Portfolio (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Type of Loans: |  |  |
Total | $ 8,084,563 | $ 7,429,147 | $ 7,059,212
Commercial Loans Member |  |  |
Type of Loans: |  |  |
30-59 Days Past Due | 7,170 | 16,832 |
60-89 Days Past Due | 16,562 | 1,610 |
Greater than 90 Days Past Due |  | 630 |
Non-accrual Loans | 21,232 | 19,958 |
Total Past Due | 44,964 | 39,030 |
Loans Not Past Due | 2,253,760 | 2,088,077 |
Total | 2,298,724 | 2,127,107 |
Real Estate Construction Loans [Member] |  |  |
Type of Loans: |  |  |
60-89 Days Past Due |  | 1,471 |
Greater than 90 Days Past Due | 0 | 0 |
Non-accrual Loans | 28,586 | 36,299 |
Total Past Due | 28,586 | 37,770 |
Loans Not Past Due | 193,115 | 143,180 |
Total | 221,701 | 180,950 | 237,372
Commercial Mortgage Loans [Member] |  |  |
Type of Loans: |  |  |
30-59 Days Past Due | 20,043 | 21,570 |
60-89 Days Past Due | 7,862 | 3,627 |
Greater than 90 Days Past Due | 982 | 0 |
Non-accrual Loans | 19,621 | 35,704 |
Total Past Due | 48,508 | 60,901 |
Loans Not Past Due | 3,974,543 | 3,707,551 |
Total | 4,023,051 | 3,768,452 | 3,748,897
Residential Mortgage And Equity Lines Member |  |  |
Type of Loans: |  |  |
30-59 Days Past Due | 3,508 | 5,324 |
60-89 Days Past Due | 832 | 1,972 |
Greater than 90 Days Past Due | 0 | 0 |
Non-accrual Loans | 13,744 | 11,941 |
Total Past Due | 18,084 | 19,237 |
Loans Not Past Due | 1,508,448 | 1,320,845 |
Total | 1,526,532 | 1,340,082 | 1,186,969
Installment And Other Loans Member |  |  |
Type of Loans: |  |  |
30-59 Days Past Due | 100 | 0 |
60-89 Days Past Due |  | 0 |
Greater than 90 Days Past Due | 0 | 0 |
Non-accrual Loans | 0 | 0 |
Total Past Due | 100 | 0 |
Loans Not Past Due | 14,455 | 12,556 |
Total | 14,555 | 12,556 |
Total [Member] |  |  |
Type of Loans: |  |  |
30-59 Days Past Due | 30,821 | 43,726 |
60-89 Days Past Due | 25,256 | 8,680 |
Greater than 90 Days Past Due | 982 | 630 |
Non-accrual Loans | 83,183 | 103,902 |
Total Past Due | 140,242 | 156,938 |
Loans Not Past Due | 7,944,321 | 7,272,209 |
Total | $ 8,084,563 | $ 7,429,147 |

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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=28368275&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=28368275&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=28368275&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=28368275&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=28368275&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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