Equity (Details)		0 Months Ended	3 Months Ended
	Jan. 30, 2014 Arizona Mills acre	Jan. 30, 2014 Operating Partnership Arizona Mills	Mar. 31, 2014 Partnership agreement of Operating Partnership item
Equity
Common stock, shares issued			48,725
The number of limited partners who received common stock in exchange for an equal number of units, during the period.			1
Number of units issued in connection with acquisition of the remaining interest in Arizona Mills		555,150
Ownership interests acquired (as a percent)	50.00%
Area of land acquired (in acre) in Oyster Bay, New York	39