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INVESTMENT SECURITIES - General Information (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended		52 Months Ended
	Nov. 26, 2019	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Investment in Alpine Income Property Trust, Inc.					$ 35,643	$ 39,445
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units
Marketable Securities [Line Items]
Number of shares owned					2,330,000
Investment in Alpine Income Property Trust, Inc.					$ 35,643	39,445
Investment ownership percentage (as a percent)					15.70%
Common Stock
Marketable Securities [Line Items]
Share purchased	421,053	129,271	155,665	8,088	1,108,814
Investment in Alpine Income Property Trust, Inc.					$ 16,942	18,750
Investment ownership percentage (as a percent)					7.50%
Alpine Income Property OP, LP Limited Partnership Units
Marketable Securities [Line Items]
Share purchased					1,223,854
Investment in Alpine Income Property Trust, Inc.					$ 18,701	$ 20,695
Investment ownership percentage (as a percent)					8.20%

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