Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-38122
Entity Registrant Name	Safehold Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	30-0971238
Entity Address, Address Line One	1114 Avenue of the Americas, 39th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10036
City Area Code	212
Local Phone Number	930-9400
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	SAFE
Security Exchange Name	NYSE
Entity Public Float			$ 1.4
ICFR Auditor Attestation Flag	true
Common Stock, Shares, Outstanding		56,631,251
Entity Central Index Key	0001688852
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Auditor Name	DELOITTE & TOUCHE LLP
Auditor Location	New York, New York
Auditor Firm ID	34