Investments in Real Estate - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Asset Acquisition
Land	$ 1,084	$ 73,560
Building and improvements	10,280	2,225,012
In place leases	662	172,620
Below market leases	(139)	(27,529)
Above market leases	0	11,098
Below market leasehold interests	0	53,722
Above market leasehold interests	0	(16,564)
Net assets acquired	11,887	2,491,919
Other, net	447	54,196
Aggregate purchase price	$ 12,334	$ 2,546,115