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Stock-Based Compensation - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	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