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MANAGEMENT SERVICES BUSINESS - General Information (Details)				12 Months Ended			49 Months Ended
	Jan. 07, 2022 USD ($) property	Dec. 10, 2021 USD ($)	Nov. 26, 2019 USD ($) property shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) property $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) shares	Feb. 16, 2023 USD ($)	Oct. 26, 2021 USD ($)
Real Estate
Outstanding Principal				$ 496,834,000			$ 496,834,000
Loss on Extinguishment of Debt						$ (3,431,000)
Revenues				109,119,000	$ 82,320,000	70,272,000
Management Fee Income
Real Estate
Revenues				4,388,000	$ 3,829,000	$ 3,305,000
Management Fee Income | Portfolio Management Agreement | Maximum
Real Estate
Revenues				$ 100,000
Alpine Income Property OP, LP Limited Partnership Units
Real Estate
Number of contributed properties | property			5
Aggregate of OP units | shares			1,223,854
Initial value			$ 23,300,000
Share purchased | shares				1,200,000
Investment ownership percentage (as a percent)				8.20%			8.20%
Common Stock
Real Estate
Share purchased | shares			421,053	129,271	155,665	8,088	1,108,814
Purchase price of shares			$ 8,000,000.0	$ 2,100,000	$ 2,700,000	$ 100,000
Investment ownership percentage (as a percent)				7.50%			7.50%
Mortgage Notes Payable Under CMBS Portfolio
Real Estate
Outstanding Principal	$ 30,000,000.0
Private placement
Real Estate
Share purchased | shares			394,737
Purchase price of shares			$ 7,500,000
2022 Acquisitions | Income Property Single Tenant
Real Estate
Number of real estate properties | property	1
Sales price	$ 6,900,000
Land JV
Real Estate
Management fee revenue earned				$ 0	0	100,000
Management fee revenue earned per month		$ 20,000,000		$ 20,000,000
Monthly management fee		$ 10,000,000				10,000,000
Management Agreement PINE
Real Estate
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				$ 0.00
Percentage of multiply factor				15.00%
Management fee revenue earned				$ 4,400,000	3,800,000	3,200,000
Dividends received				$ 2,500,000	$ 2,300,000	$ 2,100,000
Alpine
Real Estate
Number of properties sold | property			15
Aggregate cash consideration			$ 125,900,000
Amount of shares authorized for purchase by the board								$ 2,100,000	$ 5,000,000.0
Average price per share | $ / shares				$ 16.21	$ 17.57	$ 17.65
Alpine | Mortgage Notes Payable Under CMBS Portfolio
Real Estate
Real estate acquired purchase price					$ 44,500,000
Number of real estate properties | property					6
Loss on Extinguishment of Debt	$ 500,000
Alpine | Mortgage Notes Payable Under CMBS Portfolio | Income Property Single Tenant
Real Estate
Real estate acquired purchase price					$ 11,500,000
Number of real estate properties | property					1
Investee | Alpine Income Property Trust, Inc.
Real Estate
Incentive fee income				$ 0	$ 0	$ 0

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