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BUSINESS SEGMENT DATA - Description (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2023
loan
segment
Mar. 31, 2022
Dec. 31, 2022
BUSINESS SEGMENT DATA      
Number of operating segment | segment 4    
Number of commercial loan investment 3    
Commercial Real Estate Portfolio Segment      
BUSINESS SEGMENT DATA      
Number of commercial loan investment 3    
Number of preferred equity investments 1    
Product concentration | Identifiable Assets [Member] | Income Properties      
BUSINESS SEGMENT DATA      
Percentage of total 91.00%   91.00%
Product concentration | Base Rent Revenues | Income Properties      
BUSINESS SEGMENT DATA      
Percentage of total 90.80% 88.10%