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INVESTMENTS IN PARTNERSHIPS Sale of Partnership Investments (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 02, 2015
Sep. 30, 2015
Dec. 31, 2015
Dec. 01, 2014
Springfield Park [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Ownership Percentage   50.00%    
Goodwill, Written off Related to Sale of Business Unit   $ 0.1    
Proceeds from Divestiture of Real Estate Partnership   20.2    
Capitalization Rate 7.00%      
Equity Method Investment, Realized Gain (Loss) on Disposal   12.0    
Mortgage Loans on Real Estate, Carrying Amount of Mortgages   $ 9.0    
Whitehall Mall [Member] | Strip And Power Center [Member]        
Schedule of Equity Method Investments [Line Items]        
Sale Price     $ 14.9  
Capitalization Rate     7.00%  
Gain/ (Loss)     $ 12.4  
Mortgage Loan Related to Property Sales       $ 5.1