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Real Estate (Net Lease Venture) (Details)	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Asset acquisition, partner ownership percentage	47.50%
iStar Net Lease I LLC | Net Lease
Schedule of Equity Method Investments [Line Items]
Asset acquisition, ownership percentage	51.90%
Asset acquisition, related party ownership percentage	0.60%
Asset acquisition, related party promote fee percentage	50.00%

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