Note 17 - Pro Forma Financial Information (Detail) - Pro Forma Financial Information (USD $) In Millions, except Per Share data	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Revenues from rental property	$ 443.0	$ 423.0
Net income	78.4	79.3
Net income available to the Company’s common shareholders	$ 43.0	$ 49.1
Net income available to the Company’s common shareholders per common share:
Basic (in Dollars per share)	$ 0.11	$ 0.12
Diluted (in Dollars per share)	$ 0.11	$ 0.12

Business Acquisition Pro Forma Net Income Loss Available To Common Shareholders

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Pro forma basic earnings per share or earnings per unit, which is commonly presented in initial public offerings based on the terms of the offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 11
-Section 02
-Paragraph b
-Subparagraph 7

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Pro forma diluted earnings per share, which is commonly presented in initial public offerings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 11
-Section 02
-Paragraph b
-Subparagraph 7

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