Real Estate and Lending Activities - Net Assets Acquired (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Liabilities assumed	$ (134,203)
Total net assets acquired	1,973,661	$ 6,492
Land and Land Improvements [Member]
Business Acquisition [Line Items]
Total assets acquired	265,991	169
Building [Member]
Business Acquisition [Line Items]
Total assets acquired	1,608,771	5,327
Intangible Lease Assets - Subject to Amortization [Member]
Business Acquisition [Line Items]
Total assets acquired	231,774	$ 996
Other Assets [Member]
Business Acquisition [Line Items]
Total assets acquired	$ 1,328