The Company and a Summary of Its Significant Accounting Policies - Summary of Contract Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Accounting Policies [Abstract]
Unbilled accounts receivable	$ 75,661	$ 83,743
Collections in excess of revenues and deferred revenues	123,019	125,540
Deferred revenues, long-term portion	$ 80,802	$ 71,230