Acquisitions - Unaudited Supplement to Pro Forma Operating Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Business Combinations [Abstract]
Pro forma revenues	$ 217,890	$ 205,357	$ 430,651	$ 412,307
Pro forma loss from continuing operations	(20,315)	(47,320)	(9,995)	(44,930)
Pro forma loss from discontinued operations	(2,305)	(34,103)	(5,700)	(51,138)
Pro forma net loss attributable to DDR common shareholders	$ (37,061)	$ (83,276)	$ (37,414)	$ (104,399)
Basic earnings per share data:
Loss from continuing operations attributable to DDR common shareholders	$ (0.11)	$ (0.17)	$ (0.10)	$ (0.18)
Loss from discontinued operations attributable to DDR common shareholders	$ (0.01)	$ (0.11)	$ (0.02)	$ (0.17)
Net loss attributable to DDR common shareholders	$ (0.12)	$ (0.28)	$ (0.12)	$ (0.35)
Diluted earnings per share data:
Loss from continuing operations attributable to DDR common shareholders	$ (0.11)	$ (0.17)	$ (0.10)	$ (0.18)
Loss from discontinued operations attributable to DDR common shareholders	$ (0.01)	$ (0.11)	$ (0.02)	$ (0.17)
Net loss attributable to DDR common shareholders	$ (0.12)	$ (0.28)	$ (0.12)	$ (0.35)

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- Definition

Business acquisition pro forma income loss from discontinued operations before changes in accounting and extraordinary items net of tax per share basic.

+ References

No definition available.

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Business acquisition pro forma income loss from discontinued operations before changes in accounting and extraordinary items net of tax per share diluted.

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No definition available.

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- Definition

Business acquisitions pro forma income loss from discontinuing operations before changes in accounting and extraordinary items net of tax.

+ References

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, per diluted share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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