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Related Party Transactions - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Feb. 13, 2019
Related Party Transaction [Line Items]
Related party interest income	$ (15,502,000)	$ (36,059,000)	$ (92,552,000)	$ (59,749,000)
Due from affiliates	$ 16,628,000		$ 16,628,000		$ 6,157,000
Related parties note receivable, RED Consolidated Holdings, LLC
Related Party Transaction [Line Items]
Note receivable, interest rate	5.25%		5.25%		5.25%
Interest income, related party	$ 0	44,000	$ 0	138,000
Joint Venture | Financing Arrangement
Related Party Transaction [Line Items]
Related party interest income	(15,502,000)	$ (36,059,000)	(92,552,000)	(59,749,000)
Unconsolidated Joint Ventures
Related Party Transaction [Line Items]
Due from affiliates	$ 16,628,000		16,628,000		$ 6,157,000
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Interest income, related party			$ 0	$ 1,112,000
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco | LIBOR
Related Party Transaction [Line Items]
Note receivable, interest rate						2.00%

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