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Business and Organization (Details)	6 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023 segment	Mar. 31, 2023 employee
Business Acquisition [Line Items]
Number of reportable segments | segment		1
Minimum
Business Acquisition [Line Items]
Ground leases term		30 years
Ground lease investment initial targeted value of ground lease of combined value		30.00%
Ground lease, ratio of property net operating income to ground lease payments due		2.0
Percentage cap for Ground Lease rent increases based on consumer price index		3.00%
Maximum
Business Acquisition [Line Items]
Ground leases term		99 years
Ground lease investment initial targeted value of ground lease of combined value		45.00%
Ground lease, ratio of property net operating income to ground lease payments due		4.5
Percentage cap for Ground Lease rent increases based on consumer price index		3.50%
Safehold, Inc. (Old SAFE)
Business Acquisition [Line Items]
Number of employees | employee			0
Portfolio Holdings | Caret Ventures
Business Acquisition [Line Items]
Ownership interest (percent)	100.00%

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Ground Lease Investments, Initial Target Value of Ground Leases Regardless of Improvements, Percent

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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482987/272-10-50-3

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-18

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