v3.26.1
Share-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Item]      
Estimated forfeiture rate 2.21% 2.07% 2.22%
Non-vested stock options outstanding expected to vest 500,000    
Common Stock, Fair Market Value Per Share $ 221.13    
Total intrinsic value of stock options exercised $ 36,700 $ 30,700 $ 18,200
Proceeds from (Payment for) Other Financing Activity 32,900 25,500 10,500
Net cash proceeds from the exercise of stock options 32,900 25,500 10,500
Tax benefit from stock option exercises $ 8,000 $ 7,600 $ 5,500
Weighted average grant date fair value of stock option grants, per share $ 69.59 $ 67.81 $ 54.60
Unrecognized compensation cost related to nonvested share-based compensation granted $ 42,600    
Weighted average period for recognition of unrecognized compensation cost 1 year 6 months    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Item]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Annual Vesting Percentage 25.00%    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 4 years    
Stock Options | Long-term Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Item]      
Remaining shares available for grant 1,700,000    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Item]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 3 years    
Share-Based Payment Arrangement By Share-Based Payment Award, Vesting Requirement, Years Of Service For Employees Of A Specified Age 5 years    
Share-Based Payment Arrangement By Share-Based Payment Award, Vesting Requirement, Years Of Service 25 years    
Fair Value, Share-based Payment Awards, Other than Options $ 31,300