Area of land owned.

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Equity Securities, FV-NI, Investment, Ownership Percentage

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Number of commercial loan investment.

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Number of commercial properties.

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Number of preferred equity investment.

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Ownership Interest in Joint Venture By Parent, Percentage

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Area of Subsurface Area of Portfolio Of Mineral Interest.

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Area of a real estate property.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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-Section 50
-Paragraph 3
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-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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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).

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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
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-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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The number of real estate properties owned as of the balance sheet date.

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The number of states the entity operates in as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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DESCRIPTION OF BUSINESS (Details) $ in Thousands, ft² in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) ft² country a property loan county	Dec. 31, 2021 USD ($)	Sep. 30, 2021	Jun. 30, 2018
Real Estate Properties
Number of commercial loan investment \| loan	5
Investment in Alpine Income Property Trust, Inc. \| $	$ 38,483	$ 41,037
Alpine Income Property Trust, Inc. Common Stock and Alpine Income Property OP, LP Limited Partnership Units
Real Estate Properties
Investment in Alpine Income Property Trust, Inc. \| $	$ 38,483	41,037
Investment ownership percentage (as a percent)	15.80%
Common Stock
Real Estate Properties
Investment in Alpine Income Property Trust, Inc. \| $	$ 16,552	$ 16,511
Investment ownership percentage (as a percent)	7.80%
Mitigation Bank
Real Estate Properties
Interest in the joint venture (as a percent)	70.00%
Area of land owned \| a	2,500
Equity method investment, ownership percentage (as a percent)			30.00%	30.00%
Florida
Real Estate Properties
Number of states in which entity operates \| country	19
Subsurface area of portfolio of mineral interests \| a	356,000
Commercial Real Estate Portfolio Segment [Member]
Real Estate Properties
Number of commercial loan investment \| loan	5
Number of commercial properties	1
Commercial
Real Estate Properties
Number of real estate properties	21
Number of states in which entity operates \| county	9
Gross leasable space \| ft²	2.8
Number of commercial properties	21
Number of preferred equity investment	1
Single-tenant
Real Estate Properties
Number of real estate properties	7
Multi-tenant
Real Estate Properties
Number of real estate properties	14