BUSINESS SEGMENT DATA - Identifiable assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
BUSINESS SEGMENT DATA
Total Assets	$ 1,066,373	$ 986,545
Corporate and Other
BUSINESS SEGMENT DATA
Total Assets	64,456	46,438
Income Properties | Operating Segments
BUSINESS SEGMENT DATA
Total Assets	950,157	902,427
Management Services | Operating Segments
BUSINESS SEGMENT DATA
Total Assets	1,565	1,370
Commercial Loans and Investments | Operating Segments
BUSINESS SEGMENT DATA
Total Assets	46,828	32,269
Real Estate Operations | Operating Segments
BUSINESS SEGMENT DATA
Total Assets	$ 3,367	$ 4,041