INCOME PROPERTIES - Dispositions (Details) $ in Thousands		3 Months Ended	9 Months Ended
	Oct. 12, 2023 USD ($)	Sep. 30, 2023 USD ($) property	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($) property	Dec. 31, 2022 USD ($)
Dispositions of Income Properties
Carrying Value		$ 46,572	$ 46,572		$ 31,908
Impairment Charges		929	1,408	$ 0
2023 Dispositions, Income Properties
Dispositions of Income Properties
Sales price		$ 22,900	22,900
Gain (Loss) on Sale			$ 3,300
Number of real estate properties | property		3	3
2023 Dispositions, Income Properties | Income Property, Outparcel Corporation, Henderson, Nevada
Dispositions of Income Properties
Sales price		$ 2,100	$ 2,100
Gain (Loss) on Sale			800
2023 Dispositions, Income Properties | Income Property, Single Tenant, Reston, Virginia
Dispositions of Income Properties
Sales price		18,500	18,500
Gain (Loss) on Sale			1,300
2023 Dispositions, Income Properties | Income Property, Multi-tenant, Crossroads Towne Center, Chandler, Arizona
Dispositions of Income Properties
Sales price		2,300	2,300
Gain (Loss) on Sale			$ 1,200
2022 Dispositions, Income Properties
Dispositions of Income Properties
Number of real estate properties | property				6
2022 Dispositions, Income Properties | Income Property, Party City Corporation, Oceanside, New York
Dispositions of Income Properties
Sales price				$ 6,900
2022 Dispositions, Income Properties, Multi-tenant | Income Property, Westland Gateway Plaza, FL
Dispositions of Income Properties
Sales price				22,200
2022 Dispositions, Income Properties, Single-tenant | Income Property, Single-tenant, Outback, Austin, Texas
Dispositions of Income Properties
Sales price				17,100
Dispositions Income Properties 2022 Chuy's Single Tenant | Income Property, The Strand - Fogo De Chao, Jacksonville, Florida
Dispositions of Income Properties
Sales price				5,800
Dispositions Income Properties 2022 Firebirds Single Tenant | Income Property, The Strand - Fogo De Chao, Jacksonville, Florida
Dispositions of Income Properties
Sales price				5,500
Dispositions Income Properties 2022 245 Riverside Multi Tenant | Income Property, The Strand - Fogo De Chao, Jacksonville, Florida
Dispositions of Income Properties
Sales price				23,600
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] | 2023 Dispositions, Income Properties | Income Property, Shopping Center, Fort Worth, Texas
Dispositions of Income Properties
Impairment Charges		$ 900
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] | 2023 Dispositions, Income Properties | Income Property, Shopping Center, Fort Worth, Texas | Subsequent Event
Dispositions of Income Properties
Sales price	$ 14,800
Gain (Loss) on Sale	$ (900)
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2022 Dispositions, Income Properties
Dispositions of Income Properties
Sales price				81,100
Gain (Loss) on Sale				$ 4,700
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income				Gain (Loss) on Disposition of Assets