Investments - Narrative (Details) $ in Thousands	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Aug. 31, 2019 USD ($) property	Sep. 30, 2018 USD ($)	Aug. 31, 2019 USD ($) property	Sep. 30, 2019 USD ($) property	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) property
Investment [Line Items]
Net investment in real estate				$ 25,700		$ 2,054,537
Number of real estate properties | property				11
Loans placed on non-accrual status, past due days				60 days
Interest income on loans receivable	$ 540	$ 1,131	$ 2,669		$ 1,964
B-1 Term Loan
Investment [Line Items]
Interest income on loans receivable	500		2,500
Wholly Owned Properties
Investment [Line Items]
Net investment in real estate	$ 1,736,447		$ 1,736,447	$ 25,731
Number of real estate properties | property	776		776	11		876