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Capital Stock and Stock-Based Awards (Tables) | 12 Months Ended
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May 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of capital stock | Capital stock consisted of the following as of May 31, 2025:
| Class A Stock |  | Common Stock |  | Preferred Stock
Authorized | 3,171,900 |  |  | 70,000,000 |  |  | 2,000,000 |
Reserved for Issuance | — |  |  | 5,139,487 |  |  | — |
Outstanding | 828,100 |  |  | 24,214,908 |  |  | — |
Schedule of share-based compensation activity | The following table sets forth the intrinsic value of stock options exercised, pretax stock-based compensation cost and related tax benefits for the Company's equity plans for the fiscal years ended May 31:
| 2025 |  | 2024 |  | 2023
Total intrinsic value of stock options exercised | $ | 0.5 |  |  | $ | 6.4 |  |  | $ | 8.2 |
Total stock-based compensation cost (pretax) |  | 9.3 |  |  |  | 11.0 |  |  |  | 10.5 |
Tax benefits (shortfalls) related to stock-based compensation cost |  | (2.5) |  |  |  | 5.0 |  |  |  | (7.8) |
Weighted average grant date fair value per option | $ | 11.92 |  |  | $ | 11.53 |  |  | $ | 11.62 |
Schedule of stock option activity | The following table sets forth the stock option activity under the Company's equity plans for the fiscal year ended May 31, 2025:
| Options |  | Weighted Average Exercise Price |  | Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in millions)
Outstanding at May 31, 2024 |  | 2,942,293 |  |  | $ | 30.99 |  |  |  |  |  |  |
Granted |  | 16,773 |  |  |  | 36.40 |  |  |  |  |  |  |
Exercised |  | (64,050) |  |  |  | 21.21 |  |  |  |  |  |  |
Expired, canceled and forfeited |  | (231,218) |  |  |  | 35.16 |  |  |  |  |  |  |
Outstanding at May 31, 2025 |  | 2,663,798 |  |  | $ | 30.90 |  |  |  | 3.1 |  | $ | — |
Exercisable at May 31, 2025 |  | 2,398,086 |  |  | $ | 30.05 |  |  |  | 2.8 |  | $ | — |
Schedule of restricted stock unit activity | The following table sets forth the restricted stock unit award activity for the fiscal years ended May 31:
|  | 2025 |  |  | 2024 |  |  | 2023
Granted |  | 410,392 |  |  |  | 177,867 |  |  |  | 139,111 |
Weighted average grant date price per unit | $ | 31.04 |  |  | $ | 37.81 |  |  | $ | 41.99 |
The following table sets forth the MSPP RSUs activity for the fiscal years ended May 31:
|  | 2025 |  |  | 2024 |  |  | 2023
MSPP RSUs allocated |  | 7,250 |  |  |  | 15,149 |  |  |  | 37,865 |
Purchase price per unit | $ | 21.49 |  |  | $ | 27.86 |  |  | $ | 25.51 |
Schedule of nonvested restricted stock unit activity | The following table sets forth the restricted stock unit and MSPP RSUs activity for the year ended May 31, 2025:
| Restricted stock units and MSPP RSUs |  |  |  | Weighted Average grant date fair value
Nonvested as of May 31, 2024 | 371,091 |  |  |  | $ | 34.55 |
Granted | 417,642 |  |  |  |  | 20.62 |
Vested | (177,324) |  |  |  |  | 36.48 |
Forfeited | (22,183) |  |  |  |  | 35.70 |
Nonvested as of May 31, 2025 | 589,226 |  |  |  | $ | 31.14 |
Schedule of employee stock purchase plan activity | The following table sets forth the ESPP share activity for the fiscal years ended May 31:
|  | 2025 |  |  | 2024 |  |  | 2023
Shares issued |  | 109,015 |  |  |  | 79,458 |  |  |  | 80,897 |
Weighted average purchase price per share | $ | 21.84 |  |  | $ | 32.38 |  |  | $ | 29.07 |

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