INCOME PROPERTIES AND LEASES - 2021 Dispositions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Sales price	$ 4,851
Gain on Sale	708
World of Beer/Fuzzy's Taco Shop, Brandon, FL
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Sales price	2,310
Gain on Sale	599
Moe's Southwest Grill, Jacksonville, FL
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Sales price	2,541
Gain on Sale	$ 109
2021 Dispositions | Single-tenant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of real estate properties | property	1
2021 Dispositions | Multi-tenant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of real estate properties | property	1