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v3.23.2

Note K - Stock-based Compensation Plans - Stock Option Activity (Details) - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2020
Statement [Line Items] |  |  |  |
Number of Shares (in shares) | 501,400 | 566,400 | 667,750 |
Proceeds on Exercise | $ 47,480,000 | $ 39,232,000 | $ 41,026,000 | $ 45,777,000
Weighted Average Exercise Price (in dollars per share) | $ 78.25 | $ 72.43 | $ 68.55 |
Number of Shares, Granted (in shares) | 140,000 | 30,000 | 30,000 |
Exercise Price, Granted (in dollars per share) | $ 69.19 | $ 150.83 | $ 65.95 |
Proceeds on Exercise, Granted | $ 9,687,000 | $ 4,525,000 | $ 1,979,000 |
Number of Shares, Exercised (in shares) | (28,000) | (94,000) | (131,350) |
Exercise Price, Exercised (in dollars per share) | $ 51.38 | $ 66.76 | $ 51.24 |
Proceeds on Exercise, Exercised | $ (1,439,000) | $ (6,276,000) | $ (6,730,000) |
Number of Shares, Cancelled (in shares) | 0 | (1,000) | 0 |
Proceeds on Exercise, Cancelled | $ 0 | $ (42,000) | $ 0 |
Exercise Price, Cancelled (in dollars per share) |  | $ 41.86 |  |
Number of Shares (in shares) | 613,400 | 501,400 | 566,400 | 667,750
Weighted Average Exercise Price (in dollars per share) | $ 77.41 | $ 78.25 | $ 72.43 | $ 68.55
Minimum [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Exercise Price, Exercised (in dollars per share) | 44.52 | 24.37 | 24.69 |
Maximum [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Exercise Price, Exercised (in dollars per share) | $ 53.02 | $ 150.83 | $ 99.05 |

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