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IMPAIRMENT (Details)
3 Months Ended 12 Months Ended
Dec. 29, 2016
USD ($)
ft²
Sep. 30, 2016
USD ($)
ft²
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Gain recognized on the sale of Redlands Promenade     $ 125,000    
Capitalization rate (as a percent)     6.75% 6.75% 6.75%
Provision for impairment     $ 0 $ (35,734,000) $ 0
Impairment on real estate     $ 0   $ 0
Park West          
Provision for impairment       $ 35,734  
Park West | Disposal by Sale          
Area of Real Estate Property | ft² 249,177 249,177      
Gain recognized on the sale of Redlands Promenade $ (1,100,000)        
Provision for impairment   $ 35,700,000      
Proceeds from Sale of Real Estate $ 32,500,000