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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants (in shares) 5,449,381    
Stock options granted (in shares) 200,314 310,140 246,222
Stock-based compensation expense $ 7,022 $ 6,232 $ 6,235
Stock-based compensation expense, net of tax $ 730 $ 848 $ 738
Market price per unit of stock award (usd per share) $ 94.34 $ 66.90 $ 88.27
Unrecognized compensation expense associated with non-vested incentive awards outstanding $ 54,014    
Nonvested stock, weighted average remaining contractual term 22 months    
Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Market price per unit of stock award (usd per share) $ 92.44    
Stock unit grant during period (in shares) 299,284    
Restricted Shares Restricted Stock Units and Market Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 23,585 $ 20,139 $ 18,054
Stock unit grant during period (in shares) 8,386 1,635 781
Equity-based compensation expense, tax benefit $ 4,557 $ 3,746 $ 3,072
Management | Nonqualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares) 200,314    
Vesting period, in years 3 years    
Management | Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Market price per unit of stock award (usd per share) $ 94.31 $ 70.88 $ 91.81
Stock unit grant during period (in shares) 269,751 345,449 229,600
Non Employee Directors | Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted (in shares) 21,147 39,792 24,055
Market price per unit of stock award (usd per share) $ 76.83 $ 42.95 $ 60.29
Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants (in shares) 3,614,500    
Stock Options Issued In Fiscal 2010 | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options expiration period (in years) 10 years