Note 6 - Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Variable Interest Entity, Primary Beneficiary [Member] \| Ground Up Developments [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 77.8
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	0.2
Variable Interest Entity, Financial or Other Support, Amount	32.8
Variable Interest Entity, Not Primary Beneficiary [Member] \| Ground Up Developments [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	37.4
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	37.4
Variable Interest Entity, Not Primary Beneficiary [Member] \| Redevelopment [Member]
Note 6 - Variable Interest Entities (Details) [Line Items]
Variable Interest Entity, Financial or Other Support, Amount	(7.4)
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 7.4

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The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685

+ Details

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- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

+ Details

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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5747-111685

+ Details

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- Definition

The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 5A

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=52262685&loc=SL6759159-111685

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- Definition

Net carrying amount of the assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), when the reporting entity is not the VIE's primary beneficiary.

+ References

No definition available.

+ Details

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