Investments in and Advances to Joint Ventures - Investments in and Advances to Joint Ventures (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Schedule Of Equity Method Investments [Line Items]
Company's share of accumulated equity	$ 121,500,000	$ 365,300,000
Redeemable preferred equity and other	72,900,000	72,200,000
Basis differentials	3,100,000	10,600,000
Deferred development fees, net of portion related to the Company's interest	(2,800,000)	(2,800,000)
Amounts payable to DDR	4,700,000	2,700,000
Investments in and Advances to Joint Ventures	$ 199,380,000	$ 448,008,000