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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Related Party Arrangements - Fees to the Manager (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Related party expenses incurred	$ 2,000,000.0	$ 2,500,000	$ 7,100,000	$ 8,100,000
Incentive fees	0	0	$ 0	0
Management fee
Related Party Transaction [Line Items]
Related party transaction rate (as a percentage)			1.50%
Management fee per quarter
Related Party Transaction [Line Items]
Related party transaction rate (as a percentage)			0.375%
Asset management fees
Related Party Transaction [Line Items]
Related party transaction rate (as a percentage)			20.00%
Asset management fees per year
Related Party Transaction [Line Items]
Related party transaction rate (as a percentage)			7.00%
Affiliated Entity \| Asset management fees
Related Party Transaction [Line Items]
Related party expenses incurred	7,100,000	$ 11,400,000	$ 22,200,000	$ 34,100,000
Due to related party	$ 7,200,000		$ 7,200,000		$ 8,400,000