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BUSINESS SEGMENT DATA - Identifiable assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
BUSINESS SEGMENT DATA    
Total Assets $ 1,061,512 $ 986,545
Corporate and Other    
BUSINESS SEGMENT DATA    
Total Assets 38,572 46,438
Income Properties | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 970,163 902,427
Management Services | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 2,625 1,370
Commercial Loans and Investments | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets 46,730 32,269
Real Estate Operations | Operating Segments    
BUSINESS SEGMENT DATA    
Total Assets $ 3,422 $ 4,041