INCOME PROPERTIES - Acquisitions (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) ft² tenant	Sep. 30, 2021 USD ($) tenant	Dec. 31, 2021 USD ($)
Acquisitions of Income Properties
Weighted average amortization period of intangible assets	6 years 6 months
Aggregate outstanding principal balance	$ 46,390		$ 38,099
Commercial Real Estate Portfolio Segment
Acquisitions of Income Properties
Aggregate outstanding principal balance	$ 46,390	$ 38,099
2022 Acquisitions
Acquisitions of Income Properties
Number of tenant repurchase options | tenant	2
Aggregate acquisition cost including capitalized acquisition costs	$ 119,700
Weighted average amortization period of intangible assets	9 years
Purchase Price	$ 119,300
2022 Acquisitions | Nonrecurring basis
Acquisitions of Income Properties
Land	35,400
Buildings and improvements	65,900
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value	19,700
Intangible liabilities for below market lease value	1,300
2022 Acquisitions | Income Property, Multi-tenant, Ashford Lane, Atlanta, Georgia
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs	$ 80,500
Property Square-Feet | ft²	162,500
Purchase Price	$ 80,200
Percentage Leased at Acquisition	98.00%
Remaining Lease Term at Acquisition Date (in years)	10 years 4 months 24 days
2022 Acquisitions | Income Property, Multi-tenant, Katy, Texas
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs	$ 39,200
Property Square-Feet | ft²	205,813
Purchase Price	$ 39,100
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	$ 17,800
2021 Acquisitions
Acquisitions of Income Properties
Number of tenant repurchase options | tenant		3
Aggregate acquisition cost including capitalized acquisition costs		$ 40,400
Land		41,400
Buildings and improvements		29,500
Intangible liabilities for below market lease value		$ 50
Remaining Lease Term at Acquisition Date (in years)		7 years 1 month 6 days
2021 Acquisitions | Income Property, Multi-tenant, Katy, Texas
Acquisitions of Income Properties
Aggregate acquisition cost including capitalized acquisition costs		$ 111,300
Purchase Price		$ 111,000