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Stock-Based Compensation - Summary of Non-Vested Stock Option Awards (Detail) - $ / shares shares in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Number of Stock Options |  |  |
Non-vested, beginning of year | 119,601 |  |
Granted | 54,200 | 58,000 | 84,400
Vested | (113,131) |  |
Forfeited | 0 |  |
Non-vested, end of year | 60,670 | 119,601 |
Weighted Average Grant Date Fair Value Per Common Share |  |  |
Non-vested, beginning of year | $ 13.78 |  |
Granted | 16.38 |  |
Vested | 13.29 |  |
Forfeited | 0 |  |
Non-vested, end of year | $ 16.23 | $ 13.78 |

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- Definition Share Based Compensation Arrangement by Share Based Payment Award, Nonvested Options, Granted in Period, Weighted Average Grant Date Fair Value + References No definition available. + Details
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