INCOME PROPERTIES - Dispositions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($) tenant property	Jul. 28, 2022 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Dispositions of Income Properties
Carrying Value	$ 31,908	$ 39,095		$ 38,320	$ 34,625
2022 Dispositions, Income Properties
Dispositions of Income Properties
Number of real estate properties | property	6
2022 Dispositions, Income Properties, Multi-tenant | Westland Gateway Plaza, FL
Dispositions of Income Properties
Sales price	$ 22,200
2022 Dispositions, Income Properties, Single-tenant | Income Property, Party City Corporation, Oceanside, New York
Dispositions of Income Properties
Sales price	6,900
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
2021 Dispositions, Multi-tenant
Dispositions of Income Properties
Number Of Tenant Repurchase Options | tenant		1
2021 Dispositions, Single-tenant
Dispositions of Income Properties
Number Of Tenant Repurchase Options | tenant		14
2021 Dispositions, Single-tenant | Income Property, Burlington Coat Stores, Inc, North Richland Hills, Texas
Dispositions of Income Properties
Sales price		$ 11,500
2021 Dispositions, Single-tenant | Income Properties, Single-tenant, CMBS Portfolio
Dispositions of Income Properties
Sales price		$ 44,500
Number of real estate properties | property		6
2021 Dispositions, Single-tenant | Twenty Four Hour Fitness, Falls Church, VA
Dispositions of Income Properties
Sales price		$ 21,500
Dispositions Income Properties 2021 Chick Fil A Single Tenant | Crossroads Property, Chandler, Arizona
Dispositions of Income Properties
Sales price		2,900
Dispositions Income Properties 2021 JP Morgan Chase Bank Single Tenant | Crossroads Property, Chandler, Arizona
Dispositions of Income Properties
Sales price		4,700
Dispositions Income Properties 2021 Fogo De Chao Single Tenant | Income Property, The Strand - Fogo De Chao, Jacksonville, Florida
Dispositions of Income Properties
Sales price		4,700
Dispositions Income Properties 2021 Wells Fargo Single Tenant | Income Property, Wells Fargo, Raleigh, North Carolina
Dispositions of Income Properties
Sales price		63,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Westland Gateway Plaza, FL
Dispositions of Income Properties
Sales price			$ 22,200
Carrying Value			$ 21,100
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, Disposed of by Sale, Not Discontinued Operations | 2022 Dispositions, Income Properties, Single-tenant | Income Property, Single-tenant, Moe's Southwest Grill, Jacksonville, Florida
Dispositions of Income Properties
Sales price		2,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2021 Dispositions, Income Properties
Dispositions of Income Properties
Sales price		162,300
Gain (Loss) on Sale		28,200
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2021 Dispositions, Multi-tenant | Income Property, World of Beer, Fuzzys Taco Shop, Brandon, Florida
Dispositions of Income Properties
Sales price		2,300
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2020 Dispositions, Income Properties and Land Parcels
Dispositions of Income Properties
Sales price		86,500
Gain (Loss) on Sale		$ 8,600
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income		Gain (Loss) on Disposition of Assets