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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, 2020 | Mar. 31, 2019
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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

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