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Share-Based Compensation - Summary of Fair Value of Vested Stock Option (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Share-based Payment Arrangement [Abstract] |  |
Grant date fair value of stock options vested | $ 25,711 | $ 33,789
Weighted-average grant date fair value per share of stock options granted | $ 25.37 | $ 20.63

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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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