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REAL ESTATE (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Real Estate [Abstract]        
Apartments $ 126,274 $ 737,661    
Apartments under construction 25,289 104,791    
Commercial properties 224,167 200,803    
Land held for development 84,016 69,466    
Real estate subject to sales contract 3,986 45,739    
Total real estate, at cost, less impairment 463,732 1,158,460    
Less accumulated depreciation (79,228) (177,546) $ (165,597) $ (150,038)
Total real estate, net of depreciation $ 384,504 $ 979,870