MORTGAGES, NOTES AND LOANS PAYABLE (Details) (USD $)	2 Months Ended	12 Months Ended		1 Months Ended		1 Months Ended		0 Months Ended			9 Months Ended	12 Months Ended			0 Months Ended	1 Months Ended			12 Months Ended	0 Months Ended	1 Months Ended				12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	May 31, 2012 Pierre Bossier Mall	May 11, 2012 Pierre Bossier Mall	Jun. 30, 2012 Southland Center	Jun. 15, 2012 Southland Center	Oct. 25, 2012 Animas Valley Mall	Dec. 31, 2012 Collateralized mortgages, notes and loans payable	Dec. 31, 2011 Collateralized mortgages, notes and loans payable	Sep. 28, 2012 Senior Facility	Dec. 31, 2012 Senior Facility	Dec. 31, 2012 Revolver	Jan. 12, 2012 Revolver	Oct. 25, 2012 Senior secured term loan	Jun. 30, 2012 Senior secured term loan	May 31, 2012 Senior secured term loan	Jan. 31, 2012 Senior secured term loan	Dec. 31, 2012 Senior secured term loan	Oct. 25, 2012 Senior secured term loan Pierre Bossier Mall	May 31, 2012 Senior secured term loan Pierre Bossier Mall	Jun. 30, 2012 Senior secured term loan Southland Center	Sep. 30, 2012 Renegotiated Senior facility	Sep. 28, 2012 Renegotiated Senior facility	Dec. 31, 2012 Subordinated Facility Brookfield	Dec. 31, 2012 Property-Level Debt item
Mortgages, notes and loans payable
Fixed-rate debt:									$ 995,545,000	$ 731,235,000
Variable-rate debt:									287,946,000	328,449,000
Total Mortgages, notes and loans payable		1,283,491,000	1,059,684,000						1,283,491,000	1,059,684,000																1,029,300,000
Non-cash debt market rate adjustments		33,794,000							33,800,000	58,000,000																33,800,000
Maximum borrowing capacity														50,000,000											100,000,000
Advance received under term loan																		433,500,000
Term of debt instrument				10 years		10 years		10 years				3 years													3 years 6 months	4 years 2 months 12 days
Variable interest rate base											one month LIBOR												LIBOR		LIBOR
Variable interest rate floor (as a percent)											1.00%														1.00%
Interest rate margin (as a percent)											5.00%													4.50%	8.50%
Default interest rate (as a percent)												2.00%													2.00%
Outstanding balance																			287,900,000
Unused fee, if aggregate unused amount is greater than or equal to 50% of credit facility (as a percent)													0.30%
Unused fee, if aggregate unused amount is less than 50% of credit facility (as a percent)													0.25%
Semi annual revolving credit fee																									250,000
Number of properties with Property-Level Debt																										18
Total number of assets																										32
Amount of hedge transaction																			130,000
Notional amount of interest rate cap																			110,000,000
Derivative reference rate																			LIBOR
Interest rate cap rate (as a percent)																			1.00%
Fair value of interest rate cap																			0
Amount of term loan refinanced					48,500,000		78,800,000	51,800,000
Fixed rate of interest (as a percent)					4.94%		5.09%	4.41%
Proceeds used to pay mortgages, notes, and loans payable	2,565,000	558,262,000	168,459,000												6,200,000	11,700,000	9,700,000			37,100,000	38,200,000	70,200,000
Land, buildings and equipment and developments in progress (before accumulated depreciation) pledged as collateral									1,640,000,000
Weighted Average interest rate (as a percent)									5.20%	4.90%																5.32%
Scheduled maturities of mortgages, notes, and loans payable for the next five years and thereafter
2013		77,940,000
2014		253,529,000
2015		301,014,000
2016		294,234,000
2017		147,874,000
Thereafter		242,694,000
Total mortgages, notes and loans payable, gross		1,317,285,000
Unamortized market rate adjustment		(33,794,000)							(33,800,000)	(58,000,000)																(33,800,000)
Total Mortgages, notes and loans payable		$ 1,283,491,000	$ 1,059,684,000						$ 1,283,491,000	$ 1,059,684,000																$ 1,029,300,000