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Basis of Presentation - Summary of Contract Assets and Liabilities (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Mar. 31, 2021
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Accounting Policies [Abstract] |  |
Unbilled accounts receivable | $ 105,366 | $ 70,785
Collections in excess of revenues and deferred revenues | 201,706 | 216,594
Deferred revenues, long-term portion | $ 90,352 | $ 84,654

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