Investments in and Advances to Joint Ventures - Investments in and Advances to Joint Ventures (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Investments in and Advances to Joint Ventures	$ 613,017,000	$ 353,907,000
Unconsolidated Joint Ventures [Member]
Schedule Of Equity Method Investments Joint Ventures [Line Items]
Company's share of accumulated equity	432,500,000	402,200,000
Redeemable preferred equity and notes receivable from investments	155,000,000	400,000
Basis differentials	(5,900,000)	(48,100,000)
Deferred development fees, net of portion related to the Company's interest	(2,900,000)	(3,600,000)
Notes and accrued interest payable to DDR	34,300,000	3,000,000
Investments in and Advances to Joint Ventures	$ 613,017,000	$ 353,907,000