MORTGAGE AND OTHER INDEBTEDNESS, NET (Fixed Rate Loans Repaid) (Details) - USD ($) $ in Thousands	1 Months Ended
	Oct. 31, 2016	Aug. 31, 2016	Jun. 30, 2016	Apr. 30, 2016	Sep. 30, 2015	Jul. 31, 2015	May 31, 2015	Dec. 31, 2016	Jul. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Mortgage and other indebtedness, net								$ 4,465,294		$ 4,710,628
Southaven Towne Center
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)	5.50%
Principal Balance Repaid	$ 38,314
Dakota Square Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)		6.23%
Principal Balance Repaid		$ 55,103
Hamilton Place
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)			5.86%
Principal Balance Repaid			$ 98,181
Loan amount			$ 107,000
Stated interest rate (percent)			4.36%
Cool Springs Crossing
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)				4.54%
Principal Balance Repaid				$ 11,313
Gunbarrel Pointe
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)				4.64%
Principal Balance Repaid				$ 10,083
Stroud Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)				4.59%
Principal Balance Repaid				$ 30,276
York Galleria
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)				4.55%
Principal Balance Repaid				$ 48,337
Outlet Shoppes at Gettysburg
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)					5.87%
Principal Balance Repaid					$ 38,112
Loan amount					$ 38,450
Stated interest rate (percent)					4.80%
Outlet Shoppes at Gettysburg | Non-Recourse Mortgage Loan
Debt Instrument [Line Items]
Loan amount					$ 38,450
Eastland Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)					5.85%
Principal Balance Repaid					$ 59,400
Brookfield Square
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)						5.08%
Principal Balance Repaid						$ 86,621
CherryVale Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)						5.00%
Principal Balance Repaid						$ 77,198
East Towne Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)						5.00%
Principal Balance Repaid						$ 65,856
West Towne Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)						5.00%
Principal Balance Repaid						$ 93,021
Imperial Valley Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date (percent)							4.99%
Principal Balance Repaid							$ 49,486
Fashion Square | Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net									$ 38,150
Stated interest rate (percent)									4.95%