Investments in and Advances To Joint Ventures (Details 2) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Investments in and advances to joint ventures
Investments in and advances to joint ventures	$ 376,613,000		$ 376,613,000		$ 417,223,000
Adjustments to Company's share of joint venture net loss
Income (loss), net	3,600,000	(600,000)	1,700,000	600,000
Unconsolidated Joint Ventures [Member]
Investments in and advances to joint ventures
Company's share of accumulated equity	457,200,000		457,200,000		480,200,000
Basis Differentials	(176,000,000)		(176,000,000)		(147,500,000)
Deferred development fees, net of portion relating to the Company's interest	(3,500,000)		(3,500,000)		(3,400,000)
Notes receivable from investments	400,000		400,000		600,000
Notes and accrued interest payable to DDR	98,500,000		98,500,000		87,300,000
Investments in and advances to joint ventures	$ 376,600,000		$ 376,600,000		$ 417,200,000

Company's share of accumulated equity of unconsolidated joint ventures.

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- Definition

This element represents amounts payable to the Company from its unconsolidated joint ventures.

+ Details

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- Definition

This element represents the Company's portion of deferred development fees and are amortized over the remaining life of the related asset.

+ Details

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- Definition

This element represents notes receivable amounts from unconsolidated joint ventures.

+ Details

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- Definition

This element represents the amortization of basis differential, deferred gains and differences in gain (loss) on sale of certain assets due to the basis differentials, and other than temporary impairment charges.

+ Details

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- Definition

The item represents the difference, if any, between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee. A difference can arise between the carrying value of the equity method investment and the value of the Entity's amount of underlying equity in net assets of the investee, for example, from appreciation of certain assets which is not recognized in earnings, but is recognized in other comprehensive income (a separate component of shareholders' equity) by the investee.

+ References

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a(3)

-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 FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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