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Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Stock-based Compensation [Abstract] |  |
Share-based compensation expense | $ 6,341 | $ 4,314
Performance-based Stock Awards [Member] |  |
Stock-based Compensation [Abstract] |  |
Period for achievement of performance-based targets | 3 years |

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- Definition The period of time during which certain financial performance-based targets must be achieved in order to trigger payment of performance-based restricted stock awards under the terms of the long-term incentive plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Details
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