Business Acquisition, Purchase Price Allocation, Noncontrolling Interest

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- Definition

Units of limited partnership interest in Down REITs which provide the Down REITs limited partners the ability to present all or some of their units for redemption for cash in the amount equal to the fair value of the Company's common stock on or about the date of redemption. In lieu of cash redemption, the Company may elect to exchange such units for an equal number of shares in the Company's common stock.

+ Details

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- Definition

Fair market value of two of the Company's joint venture partners' interests that allow the partners to require the Company to purchase them at a future time.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13, 16

-Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity 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. This item represents notes payable as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: 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

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Fair Value - Additional Information (Detail) (USD $)	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2011 Fair Value, Inputs, Level 3 Redeemable Noncontrolling Interests Temporary Equity Put Option	Dec. 31, 2010 Fair Value, Inputs, Level 3 Redeemable Noncontrolling Interests Temporary Equity Put Option	Sep. 30, 2011 Fair Value, Inputs, Level 1 Redeemable Noncontrolling Interests Temporary Equity	Dec. 31, 2010 Fair Value, Inputs, Level 1 Redeemable Noncontrolling Interests Temporary Equity	Sep. 30, 2011 Fair Value, Inputs, Level 2 Bond Indebtedness, Notes Payable and Outstanding Credit Facility	Dec. 31, 2010 Fair Value, Inputs, Level 2 Bond Indebtedness, Notes Payable and Outstanding Credit Facility	Mar. 31, 2011 Put Option
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Noncontrolling interest acquired									$ 6,570,000
Redemption options (the Puts)			5,529,000	12,106,000
Fair value of the DownREIT units					879,000	1,721,000
Debt Instrument Carrying Amount	3,785,830,000	4,068,417,000					3,785,830,000	4,068,417,000
Debt Instrument Fair Value							$ 3,946,337,000	$ 4,236,216,000