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Note 12 - Fair Value Measurements - Estimate of Fair Value Differs From Carrying Amounts (Details) - USD ($)
$ in Thousands

Mar. 31, 2018

Dec. 31, 2017

Reported Value Measurement [Member]

Notes payable

^[1]

$ 4,597,967

$ 4,596,140

Reported Value Measurement [Member] | Mortgages [Member]

Mortgages payable

^[2]

499,355

882,787

Estimate of Fair Value Measurement [Member]

Notes payable

^[1]

4,418,144

4,601,479

Estimate of Fair Value Measurement [Member] | Mortgages [Member]

Mortgages payable

^[2]

$ 494,366

$ 881,427

[1]

The Company determined that the valuation of its Senior Unsecured Notes were classified within Level 2 of the fair value hierarchy and its Credit Facility was classified within Level 3 of the fair value hierarchy. The estimated fair value amounts classified as Level 2 as of March 31, 2018 and December 31, 2017, were $4.4 billion and $4.6 billion, respectively. The estimated fair value amounts classified as Level 3 as of March 31, 2018 and December 31, 2017, were $2.2 million and $1.9 million, respectively.

[2]

The Company determined that its valuation of Mortgages payable, net was classified within Level 3 of the fair value hierarchy.

X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value portion of notes payable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

X

- Details

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Balance Type:
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