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Stock-Based Compensation - Schedule of Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) - $ / shares
 6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Shares    
Unvested, beginning of period (in shares) 402,200 391,900
Granted (in shares) 128,300 145,700
Incremental performance shares (in shares)   41,100
Vested (in shares) (128,600) (192,700)
Forfeited (in shares) (23,800) (4,900)
Unvested, end of period (in shares) 378,100 381,100
Vested, end of period (in shares) 110,200 108,500
Weighted Average Grant-Date Fair Value    
Unvested, beginning of period (in USD per share) $ 63.20 $ 54.43
Granted (in USD per share) 82.04 69.70
Vested (in USD per share) 57.61 47.60
Forfeited (in USD per share) 63.88 59.31
Unvested, end of period (in USD per share) 71.45 62.57
Vested, end of period, weighted-average grant-date fair value (in USD per share) $ 43.14 $ 40.87