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INVESTMENT SECURITIES - Tabular Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	$ 43,735	$ 41,635
Unrealized Gains in Investment Income		406
Unrealized Losses in Investment Income	(4,290)
Investment Securities	39,445	42,041
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	43,735	41,635
Unrealized Gains in Investment Income		406
Unrealized Losses in Investment Income	(4,290)
Investment Securities	39,445	42,041
Common Stock
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Cost	20,482	18,382
Unrealized Gains in Investment Income		308
Unrealized Losses in Investment Income	(1,732)
Investment Securities	18,750	18,690
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
Unrealized Losses in Investment Income	(2,558)
Investment Securities	$ 20,695	$ 23,351

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

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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
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A

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