UNCONSOLIDATED REAL ESTATE AFFILIATES (Details 3) (USD $)		0 Months Ended	3 Months Ended	12 Months Ended
	Mar. 28, 2013	Jan. 14, 2013 Aliansce Shopping Centers S.A	Mar. 31, 2013 Aliansce Shopping Centers S.A	Dec. 31, 2012 Aliansce Shopping Centers S.A	Dec. 13, 2012 Aliansce Shopping Centers S.A	Mar. 31, 2013 Shopping Leblon, in Rio de Janeiro	Mar. 31, 2013 Unconsolidated	Dec. 31, 2012 Unconsolidated
Condensed Combined Financial Information of Unconsolidated Real Estate Affiliates
Ownership interest in joint venture (as a percent)	55.00%	40.00%	40.50%		45.50%	35.00%
Gain on investment in Aliansce			$ 3,400,000	$ 23,400,000
Additional ownership interest in joint venture (as a percent)	15.00%
Number of days within additional shares were issued		30 days
Additional shares issued to underwriters (as a percent)		15.00%
Investment in number of share of Aliansce			63,000,000
Entity's proportionate share in indebtedness secured by Unconsolidated Properties including retained debt							3,200,000,000	3,100,000,000
Aggregate carrying value of retained debt, reflected as a reduction in entity's investment in Unconsolidated Real Estate Affiliates							$ 91,400,000	$ 91,800,000