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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax stock-based compensation expense	$ 6,175	$ 4,547	$ 10,691	$ 8,783
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		$ 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			$ 11,640
Restricted common shares, granted			176,000
Restricted common shares, fair value per share			$ 65.97
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