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Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 12301 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 12401 - Disclosure - BUSINESS SEGMENT DATA link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - INCOME PROPERTIES AND LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - RELATED PARTY MANAGEMENT SERVICES BUSINESS (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - REAL ESTATE OPERATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - INVESTMENT IN JOINT VENTURES (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - INVESTMENT SECURITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - 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Disclosure - DESCRIPTION OF BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued Accounting Standards - General Information (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued Accounting Standards - Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reclassifications (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Cash and Investment Securities (Details) link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - REVENUE RECOGNITION - Major Good or Service (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - REVENUE RECOGNITION - Timing of Revenue Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - INCOME PROPERTIES AND LEASES - 2021 and 2020 Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - INCOME PROPERTIES AND LEASES - 2021 Dispositions (Details) link:presentationLink link:calculationLink link:definitionLink 40405 - Disclosure - INCOME PROPERTIES AND LEASES - 2021 Leasing Activity (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - COMMERCIAL LOAN AND MASTER LEASE INVESTMENTS - Summary of Commercial Loan Investments (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - RELATED PARTY MANAGEMENT SERVICES BUSINESS - General Information (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - 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Disclosure - INVESTMENT IN JOINT VENTURES - Summarized Financial Information - Statement of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - INVESTMENT IN JOINT VENTURES - Adjustments (Details) link:presentationLink link:calculationLink link:definitionLink 40805 - Disclosure - INVESTMENT IN JOINT VENTURES - General information (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - INVESTMENT SECURITIES - General Information (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Value and Estimated Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Measured on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets Measured on a Nonrecurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - 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