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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accumulated amortization on deferred charges $ 38,667us-gaap_AccumulatedAmortizationDeferredFinanceCosts $ 38,796us-gaap_AccumulatedAmortizationDeferredFinanceCosts
Common shares, par value $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common shares, shares authorized 600,000,000us-gaap_CommonStockSharesAuthorized 600,000,000us-gaap_CommonStockSharesAuthorized
Common shares, shares issued 361,082,421us-gaap_CommonStockSharesIssued 360,711,232us-gaap_CommonStockSharesIssued
Treasury at cost 1,024,851us-gaap_TreasuryStockShares 957,068us-gaap_TreasuryStockShares
Class J Preferred Shares [Member]    
Cumulative redeemable preferred shares, liquidation value $ 500us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
$ 500us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
Cumulative redeemable preferred shares, shares authorized 750,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
750,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
Cumulative redeemable preferred shares, shares issued 400,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
400,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
Cumulative redeemable preferred shares, shares outstanding 400,000us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
400,000us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
Preferred stock dividend rate 6.50%ddr_PreferredStockDividendsRatePercentage
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
6.50%ddr_PreferredStockDividendsRatePercentage
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassJPreferredStockMember
Cumulative redeemable preferred shares, par value      
Class K Preferred Shares [Member]    
Cumulative redeemable preferred shares, liquidation value $ 500us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
$ 500us-gaap_PreferredStockLiquidationPreference
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
Cumulative redeemable preferred shares, shares authorized 750,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
750,000us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
Cumulative redeemable preferred shares, shares issued 300,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
300,000us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
Cumulative redeemable preferred shares, shares outstanding 300,000us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
300,000us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
Preferred stock dividend rate 6.25%ddr_PreferredStockDividendsRatePercentage
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
6.25%ddr_PreferredStockDividendsRatePercentage
/ us-gaap_StatementClassOfStockAxis
= ddr_ClassKPreferredStockMember
Cumulative redeemable preferred shares, par value