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Related Party Transactions - Narrative (Details) - USD ($)	Jul. 30, 2020	Jun. 30, 2020
Hollywood Media Portfolio | Investee
Related Party Transaction [Line Items]
Notes receivable	$ 107,800,000
Hollywood Media Portfolio | Investee | Blackstone Property Partners
Related Party Transaction [Line Items]
Notes receivable	12,500,000
Hollywood Media Portfolio Debt
Related Party Transaction [Line Items]
Debt instrument, face amount	$ 900,000,000.0
Hollywood Media Portfolio
Related Party Transaction [Line Items]
Ownership percentage sold	49.00%	49.00%
Percentage ownership retained	51.00%

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