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IMPAIRMENT (Details)
3 Months Ended 12 Months Ended
Dec. 29, 2016
USD ($)
Sep. 30, 2016
USD ($)
ft²
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 07, 2018
ft²
Impaired Long-Lived Assets Held and Used [Line Items]            
Impairment on real estate     $ 0 $ 0    
Area of real estate property | ft²           257,000
Provision for impairment     $ 0 $ 0 $ 35,734,000  
Capitalization rate (as a percent)     6.75% 6.75% 6.75%  
Park West            
Impaired Long-Lived Assets Held and Used [Line Items]            
Provision for impairment       $ 0    
Park West | Disposal by Sale            
Impaired Long-Lived Assets Held and Used [Line Items]            
Area of real estate property | ft²   249,177        
Provision for impairment   $ 35,700,000        
Proceeds from sale of real estate $ 32,500,000          
Gain recognized on the sale of Redlands Promenade $ 1,100,000