Real Estate and Lending Activities - Assets Acquired (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	$ 562,633	$ 115,000
Land and Land Improvements [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	21,591	8,477
Building [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	473,425	99,640
Intangible lease assets - subject to amortization [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired		$ 6,883
Net investments in direct financing leases [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	10,700
Other loans [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	16,917
Mortgage loans [Member]
Significant Acquisitions and Disposals [Line Items]
Total assets acquired	$ 40,000