Investments - Schedule of Loan Activity (Details) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($) property	Aug. 31, 2019 USD ($) property	Sep. 30, 2019 USD ($) property
Number Of Real Estate Properties Under Mortgage Loans [Roll Forward]
Ending balance | property	11		11
Total Investment
Real Estate and Loan Activity [Roll Forward]
Beginning balance		$ 65,194	$ 65,194
Acquisitions		0
Dispositions		0
Principal payments and payoffs	$ (27,890)	(34,416)
Write-off of principal balance		(2,888)
Ending balance	$ 0	$ 27,890	$ 0
Mortgage loans
Number Of Real Estate Properties Under Mortgage Loans [Roll Forward]
Beginning balance | property		8	8
Acquisitions | property		0
Dispositions | property		0
Principal payments and payoffs | property	(6)	0
Write-off of principal balance | property		(2)
Ending balance | property	0	6	0
Real Estate and Loan Activity [Roll Forward]
Beginning balance		$ 30,778	$ 30,778
Acquisitions		0
Dispositions		0
Principal payments and payoffs	$ (27,890)	0
Write-off of principal balance		(2,888)
Ending balance	0	27,890	0
Notes Receivable
Real Estate and Loan Activity [Roll Forward]
Beginning balance		34,416	34,416
Acquisitions		0
Dispositions		0
Principal payments and payoffs	0	(34,416)
Write-off of principal balance		0
Ending balance	$ 0	$ 0	$ 0