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Notes Receivable - Loans Receivable on Real Estate (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Receivables [Abstract]
Balance at January 1	$ 52,444ddr_MortgageLoansReceivableBalance	$ 72,218ddr_MortgageLoansReceivableBalance
Additions:
Interest	0ddr_MortgageLoansOnRealEstateInterest	473ddr_MortgageLoansOnRealEstateInterest
Accretion of discount	240us-gaap_AccretionOfDiscount	227us-gaap_AccretionOfDiscount
Deductions:
Payments of principal and interest	(6,042)ddr_PaymentsOfPrincipalAndInterest	(113)ddr_PaymentsOfPrincipalAndInterest
Balance at March 31	$ 46,642ddr_MortgageLoansReceivableBalance	$ 72,805ddr_MortgageLoansReceivableBalance

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- Definition

Mortgage loans on real estate interest.

+ References

No definition available.

+ Details

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- Definition

Amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position related to mortgage loans receivable.

+ References

No definition available.

+ Details

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- Definition

Payments of principal and interest.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 35

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62500-109447

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