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Note 15 - Fair Value Disclosure of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: |  |
Marketable equity securities | $ 5,909 | $ 87,659
Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Marketable equity securities | 5,909 | 87,659
Liabilities: |  |
Interest rate swaps | 1,426 | 1,404
Fair Value, Measurements, Nonrecurring [Member] |  |
Liabilities: |  |
Real estate | 52,439 | 80,270
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Marketable equity securities | 5,909 | 87,659
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Interest rate swaps | 1,426 | 1,404
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Liabilities: |  |
Real estate | $ 52,439 | $ 80,270

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 + Details
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