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Equity (Tables) | 12 Months Ended
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May 31, 2025
Equity |
Schedule of assumptions used in the Black-Scholes option pricing model to estimate the fair value of stock option grant | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Stock Options Granted In Fiscal Year |
​ |  | 2025 |  | 2024 |  | 2023 |
Risk-free interest rate | ​ | 4.2 | % | 4.1 | % | 3.1 | %
Expected volatility of common stock |  | 36.0 | % | 42.3 | % | 42.2 | %
Dividend yield |  | 0.0 | % | 0.0 | % | 0.0 | %
Expected option term in years |  | 4.9 | ​ | 5.1 | ​ | 5.2 | ​
​
Schedule of stock option activity | A summary of stock option activity for the three years ended May 31, 2025 consisted of the following (shares in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2025 | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ |  | Shares |  | Exercise Price |  | Shares |  | Exercise Price |  | Shares |  | Exercise Price
Outstanding at beginning of year | ​ | 1,004 | ​ | $ | 38.49 | ​ | 1,573 | ​ | $ | 33.24 | ​ | 2,045 | ​ | $ | 29.86
Granted |  | 157 | ​ | ​ | 67.02 |  | 142 | ​ | ​ | 58.27 |  | 222 | ​ | ​ | 41.88
Exercised |  | (212) | ​ | ​ | 29.81 |  | (706) | ​ | ​ | 30.67 |  | (631) | ​ | ​ | 25.31
Cancelled |  | (14) | ​ | ​ | 60.59 |  | (5) | ​ | ​ | 48.40 |  | (63) | ​ | ​ | 33.25
Outstanding at end of year |  | 935 | ​ | $ | 44.94 |  | 1,004 | ​ | $ | 38.49 |  | 1,573 | ​ | $ | 33.24
Options exercisable at end of year |  | 635 | ​ | $ | 38.13 |  | 696 | ​ | $ | 33.95 |  | 1,018 | ​ | $ | 35.09
Schedule of restricted share activity | Restricted share activity during fiscal 2025 was as follows (shares in thousands):
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted Average
​ | ​ | Number of | ​ | Fair Value
​ |  | Shares |  | on Grant Date
Nonvested at May 31, 2024 |  | 636 | ​ | $ | 48.84
Granted |  | 287 | ​ | ​ | 60.68
Vested |  | (366) | ​ | ​ | 47.05
Forfeited |  | (21) | ​ | ​ | 58.51
Nonvested at May 31, 2025 |  | 536 | ​ | ​ | 56.47
​

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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