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RELATED PARTY MANAGEMENT SERVICES BUSINESS - General Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 10, 2021 USD ($)	Nov. 26, 2019 USD ($) property shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Jan. 07, 2022 USD ($) property	Aug. 26, 2021 USD ($) $ / shares
Real Estate [Line Items]
Share purchased \| shares		1,223,854		823,878
Purchase price of shares				$ 357	$ 513	$ 532
Equity Method Investments				0	48,677
Investment in Alpine Income Property Trust, Inc.				$ 41,037	30,574
Percentage of investment in PINE				6.30%
Sales price				$ 162,300
Outstanding Principal				283,034	280,500
Gain (Loss) on Extinguishment of Debt				$ (3,431)	$ 1,141
Alpine Income Property Trust, Inc.
Real Estate [Line Items]
Share purchased \| shares				8,088
Purchase price of shares				$ 100
Closing share price (in dollars per share) \| $ / shares				$ 17.65
Investment in Alpine Income Property Trust, Inc.				$ 41,000
Percentage of investment in PINE				15.60%
Private placement
Real Estate [Line Items]
Share purchased \| shares		394,737
Purchase price of shares		$ 7,500
IPO Purchase
Real Estate [Line Items]
Share purchased \| shares					815,790	815,790
IPO Purchase \| Alpine Income Property Trust, Inc.
Real Estate [Line Items]
Share purchased \| shares		421,053
Purchase price of shares		$ 8,000
OP Units \| Alpine Income Property Trust, Inc.
Real Estate [Line Items]
Share purchased \| shares				1,223,854
2022 Acquisitions \| Subsequent Event
Real Estate [Line Items]
Number of real estate properties \| property							1
Sales price							$ 6,900
Land JV
Real Estate [Line Items]
Management fee revenue earned				$ 100	$ 200	$ 100
Equity Method Investments					41,765
Percentage of investment in PINE	33.50%
Management fee revenue earned per month	$ 20			20,000
Monthly management fee	$ 10			$ 10,000
Management Agreement PINE
Real Estate [Line Items]
Percentage of base management fee				0.375%
Management fee (as a percent)				1.50%
Percentage of cumulative annual hurdle rate				8.00%
Amount of threshold incentive fee				$ 0
Percentage of multiply factor				15.00%
Amount of incentive fee				$ 0	0
Management fee revenue earned				3,200	2,600	300
Proceeds from Dividends Received				$ 2,100	$ 1,700	$ 100
Alpine
Real Estate [Line Items]
Number of properties sold \| property		15
Aggregate cash consideration		$ 125,900
Share purchased \| shares				823,878
Amount of shares authorized for purchase by the board								$ 5,000
Closing share price (in dollars per share) \| $ / shares				$ 17.65				$ 17.75
Alpine \| Mortgage Notes Payable Under CMBS Portfolio
Real Estate [Line Items]
Real estate acquired purchase price			$ 44,500
Outstanding Principal			30,000
Gain (Loss) on Extinguishment of Debt			500
Alpine \| Mortgage Notes Payable Under CMBS Portfolio \| Income Property Single Tenant
Real Estate [Line Items]
Real estate acquired purchase price			$ 11,500
Alpine \| IPO Purchase
Real Estate [Line Items]
Number of contributed properties \| property		5
Aggregate of OP units \| shares		1,223,854
Initial value		$ 23,300