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Note 15 - Fair Value Disclosure of Financial Instruments - Estimate of Fair Value Differs From Carrying Amounts (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Mortgages [Member] |  |  |
Fair value debt adjustments, net |  | $ 19,300 | $ 27,700
Reported Value Measurement [Member] |  |  |
Notes payable | [1] | 4,596,140 | 3,927,251
Reported Value Measurement [Member] | Mortgages [Member] |  |  |
Fair value debt adjustments, net | [2] | 882,787 | 1,139,117
Estimate of Fair Value Measurement [Member] |  |  |
Notes payable | [1] | 4,601,479 | 3,890,797
Estimate of Fair Value Measurement [Member] | Mortgages [Member] |  |  |
Fair value debt adjustments, net | [2] | $ 881,427 | $ 1,141,047
[1] | The Company determined that the valuation of its Senior Unsecured Notes and MTN notes were classified within Level 2 of the fair value hierarchy and its Term Loan and Credit Facility were classified within Level 3 of the fair value hierarchy. The estimated fair value amounts classified as Level 2 as of December 31, 2017 and 2016, were $4.6 billion and $3.6 billion, respectively. The estimated fair value amounts classified as Level 3 as of December 31, 2017 and 2016, were $1.9 million and $272.5 million, respectively.
[2] | The Company determined that its valuation of these Mortgages payable was classified within Level 3 of the fair value hierarchy.

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Fair value portion of notes payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Details
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