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INVESTMENT SECURITIES - Tabular Disclosure (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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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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- Definition Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, before Tax + References No definition available. + Details
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- Definition 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 + Details
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