Real Estate and Lending Activities - Assets Acquired (Detail) - USD ($) $ in Thousands		Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Total assets acquired		$ 273,728	$ 600,781
Liabilities assumed			(878)
Loans repaid	[1]	(259,378)
Total net assets acquired		14,350	600,781
Land and Land Improvements [Member]
Business Acquisition [Line Items]
Total assets acquired		16,121	87,620
Building [Member]
Business Acquisition [Line Items]
Total assets acquired		232,409	399,867
Intangible Lease Assets - Subject to Amortization [Member]
Business Acquisition [Line Items]
Total assets acquired		$ 25,198	73,722
Net Investments in Direct Financing Leases [Member]
Business Acquisition [Line Items]
Total assets acquired			$ 40,450

[1] Includes $259.4 million of loans advanced to Steward Health Care System LLC (“Steward”) in 2017 and repaid in 2018 as described more fully below.