INCOME PROPERTIES - Acquisitions (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) ft² property tenant	Jun. 30, 2022 USD ($) ft²	Feb. 24, 2023 ft²
Acquisitions of Income Properties
Weighted average amortization period of intangible assets	6 years 1 month 6 days
2023 Acquisitions
Acquisitions of Income Properties
Weighted average amortization period of intangible assets	5 years 7 months 6 days
2023 Acquisitions | Income Property, Multi-tenant, Rockwall, Texas
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs	$ 61.3
Property Square-Feet | ft²	446,500
Purchase Price	$ 61.2
Percentage Leased at Acquisition	95.00%
Remaining Lease Term at Acquisition Date (in years)	4 years 2 months 12 days
2023 Acquisitions | Income Property Exchange at Gwinnett, Buford, Georgia
Acquisitions of Income Properties
Number of real estate properties | property	4
Aggregate acquisition cost including capitalized acquisition costs	$ 14.7
Property Square-Feet | ft²	24,100		28,100
Purchase Price	$ 14.6
Number of tenant | tenant	6
Remaining Lease Term at Acquisition Date (in years)	9 years 10 months 24 days
2023 Acquisitions | Contract for acquisitions of remaining portion of Income Property Exchange at Gwinnett, Buford, Georgia
Acquisitions of Income Properties
Area of real estate property acquired | ft²	4,000
Purchase Price	$ 2.3
2023 Acquisitions | Income Property, Multi-tenant, Rockwall, Texas and Income Property Exchange at Gwinnett, Buford, Georgia
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs	76.0
Land	16.9
Buildings and improvements	53.6
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value	8.7
Intangible liabilities for below market lease value	$ 3.2
2022 Acquisitions
Acquisitions of Income Properties
Weighted average amortization period of intangible assets		5 years 8 months 12 days
2022 Acquisitions | Income Property, Multi-tenant, Katy, Texas
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs		$ 39.2
Land		15.6
Buildings and improvements		17.9
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value		5.9
Intangible liabilities for below market lease value		$ 0.2
Property Square-Feet | ft²		205,813
Purchase Price		$ 39.1
Percentage Leased at Acquisition		95.00%
Remaining Lease Term at Acquisition Date (in years)		5 years 8 months 12 days
2022 Acquisitions | Income Property, Multi-tenant, Katy, Texas | Fixed-Rate Mortgage Note
Acquisitions of Income Properties
Aggregate outstanding principal balance		$ 17.8