Real Estate and Lending Activities - Assets Acquired (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Business Acquisition [Line Items]
Total assets acquired	$ 9,004
Land [Member]
Business Acquisition [Line Items]
Total assets acquired	1,230
Building [Member]
Business Acquisition [Line Items]
Total assets acquired	6,901
Intangible Lease Assets - Subject to Amortization [Member]
Business Acquisition [Line Items]
Total assets acquired	$ 873