The Company and a Summary of Its Significant Accounting Policies - Summary of Contract Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Accounting Policies [Abstract]
Unbilled accounts receivable	$ 70,785	$ 75,661
Collections in excess of revenues and deferred revenues	216,594	123,019
Deferred revenues, long-term portion	$ 84,654	$ 80,802