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REAL ESTATE PROPERTIES - Schedule of Real Estate Properties (Including Properties Held For Sale) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Real Estate [Abstract]    
Land $ 25,585 $ 29,227
Building 154,854 154,854
Building improvements 10,590 9,702
Real estate properties 191,029 193,783
Accumulated depreciation (30,837) (24,094)
Total real estate properties, net $ 160,192 $ 169,689