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BUSINESS SEGMENT DATA - Identifiable Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
BUSINESS SEGMENT DATA    
Total Assets $ 1,041,083 $ 989,668
Corporate and Other    
BUSINESS SEGMENT DATA    
Total Assets 35,416 36,486
Income Properties | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 935,976 887,345
Management Services | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 1,406 1,395
Commercial Loans and Investments | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 66,816 62,099
Real Estate Operations | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets $ 1,469 $ 2,343