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Real Estate (Net Lease Venture) (Details) | Sep. 30, 2021
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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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