Subsequent Events - Additional Information (Detail) (USD $)			1 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Oct. 31, 2014 BRE DDR Retail Holdings III [Member] Subsequent Events [Member] ShoppingCenter sqft
Subsequent Event [Line Items]
Number of shopping centers			71
Number of square feet of gross leasable area of shopping centers			11,400,000
Purchase price cost			$ 1,930,000,000
Mortgage debt assumed			436,800,000
New mortgage debt	400,000,000	400,000,000	800,000,000
Ownership interest of joint venture partner			95.00%
Remaining ownership interest of affiliate partner			5.00%
Common equity investment in joint venture			19,600,000
Preferred equity investments with affiliates of Blackstone			$ 300,000,000
Preferred stock dividend rate			8.50%