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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
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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

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