Investments in Real Estate - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Asset Acquisition
Land	$ 2,817	$ 33,408
Building and improvements	45,610	174,708
In place leases	4,651	18,532
Below market leases	(762)	(3,386)
Above market leases	479	2,046
Below market leasehold interests	(242)	0
Net real estate assets acquired	52,553	225,308
Other, net	334	4,543
Aggregate purchase price	$ 52,887	$ 229,851