Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Aug. 31, 2023	Aug. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax stock-based compensation expense	$ 4,516	$ 4,236
Non-Qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-qualified stock options, granted	54,000
Par value of common stock	$ 0
Non-qualified stock option, per share weighted average price	69.47
Non-qualified stock option, fair value, per share price	$ 25.95
Pre-tax stock-based compensation, period of recognition	3 years
Pre-tax stock-based compensation expense	$ 1,401
Service-Based Restricted Common Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax stock-based compensation, period of recognition	3 years
Pre-tax stock-based compensation expense	$ 6,757
Restricted common shares, granted	97,000
Restricted common shares, fair value per share	$ 69.62
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax stock-based compensation expense	$ 3,235
Restricted common shares, granted	47,000
Pre-tax stock-based compensation, period of recognition	3 years

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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