Note 12 - Fair Value Measurements (Detail) - Estimate of Fair Value Differs From Carrying Amounts (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Mortgages Payable	$ (1,041,082)	$ (1,046,313)
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Marketable Securities	44,898	223,991
Notes Payable	2,899,069	2,982,421
Mortgages Payable	1,041,082	1,046,313
Construction Loans Payable	40,218	30,253
Mandatorily Redeemable Noncontrolling Interests (termination dates ranging from 2019 – 2027)	2,581	2,697
Estimate of Fair Value, Fair Value Disclosure [Member]
Marketable Securities	45,704	224,451
Notes Payable	3,113,509	3,162,183
Mortgages Payable	1,125,140	1,120,797
Construction Loans Payable	43,756	32,192
Mandatorily Redeemable Noncontrolling Interests (termination dates ranging from 2019 – 2027)	$ 5,044	$ 5,462

The fair value as of the reporting date of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) is represented by an equity interest that does not conform to either common or preferred equity (noncontrolling) interests otherwise provided for in the taxonomy, regardless of investee entity legal form.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph (12)(c)
-Section S99
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=6802392&loc=SL6540498-122764

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph 14
-Paragraph 3A
-Section S99
-URI http://asc.fasb.org/extlink&oid=6802392&loc=SL6540498-122764

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 43
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph 15
-Paragraph 3A
-Section S99
-URI http://asc.fasb.org/extlink&oid=6802392&loc=SL6540498-122764

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number D-98
-Paragraph 43
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 27
-Appendix A
-Subparagraph c

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Subparagraph (16)(c)
-Paragraph 3A
-Section S99
-URI http://asc.fasb.org/extlink&oid=6802392&loc=SL6540498-122764

+ Details