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Earnings Per Share - Computation of Company's Earnings Per Share (EPS) and Reconciliation of Net (Loss) Income from Continuing Operations and Number of Common Shares Used in Computations of "Basic" EPS and "Diluted" EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Loss from continuing operations	$ (32,141)	$ (14,721)	$ (96,049)	$ (106,876)
Plus: Gain on disposition of real estate	29,508	44,599	39,519	82,726
Income attributable to non-controlling interests, net	(696)	(267)	(952)	(480)
Less: Preferred dividends	(8,383)	(6,399)	(16,766)	(11,993)
Less: Earnings attributable to unvested shares and operating partnership units	(650)	(251)	(852)	(502)
Net (loss) income attributable to common shareholders after allocation to participating securities	$ (12,362)	$ 22,961	$ (75,100)	$ (37,125)
Denominators – Number of Shares
Basic—Average shares outstanding	184,634	183,493	184,595	183,355
Assumed conversion of diluted securities	0	22	0	0
Diluted—Average shares outstanding	184,634	183,515	184,595	183,355
Loss Per Share:
Basic	$ (0.07)	$ 0.13	$ (0.41)	$ (0.20)
Diluted	$ (0.07)	$ 0.13	$ (0.41)	$ (0.20)

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Net income (loss) attributable to DDR common shareholders after allocation to participating securities.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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