Real Estate and Lending Activities - Assets Acquired (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Liabilities assumed	$ (878)
Total assets acquired	600,781	$ 109,991
Land and Land Improvements [Member]
Business Acquisition [Line Items]
Total assets acquired	86,434	6,382
Building [Member]
Business Acquisition [Line Items]
Total assets acquired	420,731	36,455
Intangible Lease Assets - Subject to Amortization [Member]
Business Acquisition [Line Items]
Total assets acquired	54,044	4,154
Net Investments in Direct Financing Leases [Member]
Business Acquisition [Line Items]
Total assets acquired	$ 40,450	$ 63,000