INCOME PROPERTIES - Dispositions (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) property	Sep. 30, 2021 USD ($) tenant property	Jul. 28, 2022 USD ($)	Dec. 31, 2021 USD ($)
Dispositions of Income Properties
Carrying Value	$ 46,201			$ 39,095
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, Single-tenant
Dispositions of Income Properties
Number Of Tenant Repurchase Options | tenant		1
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 Property, Staples, Sarasota, Florida
Dispositions of Income Properties
Sales price		4,700
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
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, Raleigh, North Carolina
Dispositions of Income Properties
Sales price		$ 63,000
2020 Dispositions, Single-tenant
Dispositions of Income Properties
Number Of Tenant Repurchase Options | tenant		13
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, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income	Gain (Loss) on Disposition of Assets
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 2021 Dispositions, Income Properties
Dispositions of Income Properties
Sales price		$ 140,800
Gain (Loss) on Sale		$ 28,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income		Gain (Loss) on Disposition of Assets
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 | 2021 Dispositions, Single-tenant | Income Property, Single-tenant, Moe's Southwest Grill, Jacksonville, Florida
Dispositions of Income Properties
Sales price		$ 2,500