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IMPAIRMENT (Summary of Impairments) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Impaired Long-Lived Assets Held and Used [Line Items]          
Impairment charge for real estate     $ 48,738,000 $ 0 $ 0
Equity method investment, impairment       $ 0  
Condominium Inventory          
Impaired Long-Lived Assets Held and Used [Line Items]          
Other asset impairment charge     7,644,000    
Mr.C Seaport          
Impaired Long-Lived Assets Held and Used [Line Items]          
Equity method investment, impairment $ 6,000,000.0   6,000,000    
Outlet Collection at Riverwalk          
Impaired Long-Lived Assets Held and Used [Line Items]          
Impairment charge for real estate   $ 48,700,000 $ 48,738,000