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Combined Guarantor Subsidiaries - Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Aug. 17, 2020
Condensed Financial Statements Captions [Line Items]
Deferred rent included in receivables	$ 9,129,000	$ 9,129,000
Rent abatements	1,848,000	1,848,000
Change in estimate of uncollectable rental revenues		41,955,000	$ 1,692,000
Accounts Receivable
Condensed Financial Statements Captions [Line Items]
Change in estimate of uncollectable rental revenues	15,808,000	17,637,000
Straight line rent receivables	753,000	1,206,000
Subsequent Event
Condensed Financial Statements Captions [Line Items]
Rent abatements				$ 15,500,000
Receivables
Condensed Financial Statements Captions [Line Items]
Deferred rent included in receivables	3,789,000	3,789,000
Rent abatements	$ 870,000	$ 870,000
Receivables | Subsequent Event
Condensed Financial Statements Captions [Line Items]
Rent abatements				$ 6,100,000

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