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Stock-Based Compensation - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock authorized for issuance |  | 7,780,633 |
Pre-tax stock-based compensation expense | $ 16,186 | $ 16,688 | $ 19,178
Pre-tax stock-based compensation from continuing operations | 13,521 | 13,155 | 14,566
Stock based compensation expense, after tax | 12,107 | 14,999 | 14,786
Unrecognized compensation cost | $ 29,857 |  |
Non-Qualified Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Purchase price percentage of fair market value on the grant date for stock options | 100.00% |  |
Stock options expiration period | 10 years |  |
Pre-tax stock-based compensation expense | $ 888 | 1,485 | 1,381
Total intrinsic value of stock options exercised | 4,589 |  |
Cash received from the exercise of stock options | 3,834 |  |
Tax benefit realized from share-based payment awards | $ 960 |  |
Non-Qualified Stock Options | First Anniversary | Issued On or After June 30, 2011 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options vesting percentage | 33.00% |  |
Non-Qualified Stock Options | Second Anniversary | Issued On or After June 30, 2011 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options vesting percentage | 33.00% |  |
Non-Qualified Stock Options | Third Anniversary | Issued On or After June 30, 2011 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options vesting percentage | 33.00% |  |
Non-Qualified Stock Options | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Purchase price percentage of fair market value on the grant date for stock options | 100.00% |  |
Service-Based Restricted Common Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Pre-tax stock-based compensation expense | $ 13,901 | $ 14,046 | $ 17,884
Pre-tax stock-based compensation, period of recognition | 3 years |  |
Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options expiration period | 3 years |  |

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