Reflects the sum for the period of the additions and reductions to the loan loss reserve, which when added to the opening balance of the reserve will agree to the ending balance in the reserve.

+ References+ Details

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References+ Details

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15C

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15D

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 FASB Staff Position (FSP)

-Number FAS115-1/124-1

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-Name Accounting Standards Codification

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-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.

+ Details

Investments in and Advances To Joint Ventures (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Total impairment charges recorded for unconsolidated joint venture investments
Total impairments of joint venture investments	$ 2,921,000	$ 227,000	$ 184,584,000
Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments	1,300,000	200,000	117,700,000
Loan loss reserve	1,600,000		66,900,000
Total impairments of joint venture investments	2,900,000	200,000	184,600,000
DDR Markaz II LLC [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments	1,300,000
Various Coventry II Fund joint ventures [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments		200,000	52,400,000
DDRTC Core Retail Fund [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments			55,000,000
DDR-SAU Retail Fund [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments			6,200,000
DPG Realty Holdings [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments			3,600,000
Central Park Solon/RO & SW Realty [Member] \| Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures [Member]
Total impairment charges recorded for unconsolidated joint venture investments
Other than Temporary Impairments			$ 500,000