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Share-Based Compensation (Share Repurchase Program) (Details) - USD ($) | 3 Months Ended | 41 Months Ended |
--- | --- | --- | ---
Jul. 31, 2021 | Jan. 30, 2021 | May 02, 2020 | Jul. 31, 2021 | Mar. 20, 2018
Share-based Payment Arrangement [Abstract] |  |  |  |  |
Authorized amount |  |  |  |  | $ 100,000,000
Repurchase and retirement of common stock (in shares) | 0 | 137,023 |  | 500,000 |
Repurchase and retirement of common stock |  | $ 12,700,000 | $ 12,663,000 | $ 50,000,000 |
Average price (dollars per share) |  | $ 92.42 |  |  |

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