INCOME PROPERTIES - General Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) property	Dec. 31, 2020 USD ($)	Mar. 11, 2022 USD ($)	Dec. 31, 2019 USD ($)
Acquisitions of Income Properties
Units issued | shares	155,665
Stock Issuance	$ 94,851		$ 513
Payments for Tenant Improvements	7,812
Carrying Value	$ 31,908	$ 39,095	$ 38,320		$ 34,625
Amount allocated of total acquisition cost
Weighted average amortization period of intangible assets	6 years 1 month 6 days
Weighted average amortization period of intangible liabilities	7 years 8 months 12 days
2021 Acquisitions
Acquisitions of Income Properties
Land		78,000
Buildings and improvements		124,900
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value		49,700
Intangible liabilities for below market lease value		$ 2,800
Amount allocated of total acquisition cost
Weighted average amortization period of intangible assets	6 years	6 years 9 months 18 days
2020 Acquisitions
Acquisitions of Income Properties
Payments to Acquire Commercial Real Estate		$ 185,100
Aggregate acquisition cost including capitalized acquisition costs		$ 185,700
Amount allocated of total acquisition cost
Weighted average amortization period of intangible assets		4 years 6 months
2020 Acquisitions, Multi-tenant
Acquisitions of Income Properties
Number of real estate properties | property		2
2020 Acquisitions, Single-tenant
Acquisitions of Income Properties
Number of real estate properties | property		2
Commercial Real Estate Portfolio Segment
Acquisitions of Income Properties
Carrying Value	$ 31,908	$ 39,095
Commercial Real Estate Portfolio Segment | 2020 Acquisitions
Acquisitions of Income Properties
Payments to Acquire Commercial Real Estate		21,000
Ground Lease Loan - 400 Josephine Street, Austin, TX
Acquisitions of Income Properties
Sales price				$ 17,100
Carrying Value		$ 17,189		$ 17,300
Lease Revenue - Billboards
Acquisitions of Income Properties
Number of real estate properties | property		9
Nonrecurring basis | 2021 Acquisitions
Acquisitions of Income Properties
Land	60,100
Buildings and improvements	208,300
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value	52,700
Intangible liabilities for below market lease value	$ 5,500
Nonrecurring basis | 2020 Acquisitions
Acquisitions of Income Properties
Land		$ 50,000
Buildings and improvements		94,600
Intangible assets pertaining to the in-place lease value, leasing fees and above market lease value		21,900
Intangible liabilities for below market lease value		1,800
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2020 Dispositions, Income Properties and Land Parcels
Acquisitions of Income Properties
Sales price		86,500
Gain (Loss) on Sale		$ 8,600
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2020 Dispositions, Income Properties
Acquisitions of Income Properties
Number of properties sold | property		11
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2020 Dispositions, Billboard Sites
Acquisitions of Income Properties
Sales price		$ 1,500
Number of properties sold | property		8
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2020 Dispositions, Land Parcels
Acquisitions of Income Properties
Number of properties sold | property		1