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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Change in Depreciable Lives of Real Estate Investments (Details) - Service Life
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
property
Dec. 31, 2020
Real Estate Properties [Line Items]    
Number of properties that changed estimated useful lives | property 7  
Property, plant, and equipment, estimated useful life 12 years 35 years
Depreciation | $ $ 9.8