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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, 2026 | May 31, 2025 | May 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock authorized for issuance |  | 8,558,849 |  |
Pre-tax stock-based compensation expense |  | $ 13,734 | $ 16,186 | $ 16,688
Pre-tax stock-based compensation from continuing operations | [1] | 13,734 | 13,521 | 13,155
Stock based compensation expense, after tax |  | 10,416 | 12,107 | 14,999
Unrecognized compensation cost |  | $ 26,271 |  |
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
Total intrinsic value of stock options exercised |  | $ 968 |  |
Cash received from the exercise of stock options |  | 898 |  |
Tax benefit realized from share-based payment awards |  | $ 1,005 |  |
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 |  | $ 7,260 | $ 13,901 | $ 14,046
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 |  |
[1] | See “Use of Non-GAAP Financial Measures and Definitions” for additional information.

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