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Stock-Based Compensation - Additional Information (Detail) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
May 31, 2024
May 31, 2023
May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock authorized for issuance 2,715    
Pre-tax stock-based compensation expense $ 16,688 $ 19,178 $ 16,100
Pre-tax stock-based compensation from continuing operations 13,155 14,566 12,474
Stock based compensation expense, after tax 14,999 14,786 12,349
Unrecognized compensation cost $ 32,187    
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 $ 1,485 1,381 1,077
Total intrinsic value of stock options exercised 9,282    
Cash received from the exercise of stock options 9,188    
Tax benefit realized from share-based payment awards $ 3,093    
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 $ 14,046 $ 17,884 $ 10,993
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