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Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 217,556 $ 227,424 $ 236,187 $ 240,421 $ 240,261 $ 253,800 $ 257,321 $ 254,423 $ 921,588 $ 1,005,805 $ 1,028,071
Net (loss) income attributable to DDR (218,038) 983 29,611 (54,241) 33,741 (60,360) 41,058 45,573 (241,685) 60,012 (72,168)
Net (loss) income attributable to common shareholders $ (226,421) $ (7,400) $ 23,212 $ (59,835) $ 28,147 $ (65,954) $ 35,464 $ 39,980 $ (270,444) $ 37,637 $ (94,543)
Basic:                      
Net (loss) income per common share attributable to common shareholders $ (0.62) $ (0.02) $ 0.06 $ (0.16) $ 0.08 $ (0.18) $ 0.10 $ 0.11 $ (0.74) $ 0.10 $ (0.27)
Weighted-average number of shares 368,320 367,686 366,987 366,430 365,965 365,508 364,976 364,691 367,362 365,294 360,946
Diluted:                      
Net (loss) income per common share attributable to common shareholders $ (0.62) $ (0.02) $ 0.06 $ (0.16) $ 0.08 $ (0.18) $ 0.10 $ 0.11 $ (0.74) $ 0.10 $ (0.27)
Weighted-average number of shares 368,320 367,686 367,030 366,430 366,075 365,508 365,318 365,042 367,362 365,561 360,946