MANAGEMENT SERVICES BUSINESS - General Information (Details) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended			55 Months Ended
	Nov. 26, 2019 USD ($) property shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) shares	Dec. 12, 2023 USD ($)	Feb. 16, 2023 USD ($)	Oct. 26, 2021 USD ($)
Real Estate
Outstanding Principal		$ 483,834		$ 483,834						$ 483,834
Revenues		28,845	$ 26,047	56,972	$ 50,764
Investment in Alpine Income Property Trust, Inc.		36,561		36,561			$ 39,445			$ 36,561
Management Fee Income
Real Estate
Revenues		1,131	1,102	2,236	2,200
Management Fee Income | Portfolio Management Agreement | Maximum
Real Estate
Revenues		100		100
Management Fee Income | Asset Management Agreement | Maximum
Real Estate
Revenues		$ 100		$ 100
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
Share purchased | shares										1,223,854
Investment ownership percentage (as a percent)		8.20%		8.20%						8.20%
Investment in Alpine Income Property Trust, Inc.		$ 19,043		$ 19,043			20,695			$ 19,043
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units
Real Estate
Investment ownership percentage (as a percent)		15.80%		15.80%						15.80%
Investment in Alpine Income Property Trust, Inc.		$ 36,561		$ 36,561			39,445			$ 36,561
Common Stock
Real Estate
Share purchased | shares	421,053			16,983		129,271		155,665	8,088	1,125,797
Purchase price of shares	$ 8,000			$ 300		$ 2,100		$ 2,700	$ 100
Investment ownership percentage (as a percent)		7.60%		7.60%						7.60%
Investment in Alpine Income Property Trust, Inc.		$ 17,518		$ 17,518			18,750			$ 17,518
Private placement
Real Estate
Share purchased | shares	394,737
Purchase price of shares	$ 7,500
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
Percentage of multiply factor				15.00%
Management fee revenue earned		1,000	$ 1,100	$ 2,100	2,200
Dividends received		600		1,300	$ 1,200
Alpine
Real Estate
Number of properties sold | property	15
Aggregate cash consideration	$ 125,900
Amount of shares authorized for purchase by the board		$ 0		$ 0			0			$ 0	$ 2,000	$ 2,100	$ 5,000
Average price per share | $ / shares				$ 14.95		$ 16.21		$ 17.57	$ 17.65
Investee | Alpine Income Property Trust, Inc.
Real Estate
Incentive fee income							$ 0