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INVESTMENT SECURITIES - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	$ 41,635	$ 38,896
Unrealized Gains in Investment Income	406	2,141
Investment Securities	42,041	41,037
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	41,635	38,896
Unrealized Gains in Investment Income	406	2,141
Investment Securities	42,041	41,037
Common Stock [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	18,382	15,643
Unrealized Gains in Investment Income	308	868
Investment Securities	18,690	16,511
Alpine Income Property OP, LP Limited Partnership Units
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	23,253	23,253
Unrealized Gains in Investment Income	98	1,273
Investment Securities	$ 23,351	$ 24,526

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Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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