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Stock-Based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) - $ / shares
 3 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Shares    
Outstanding, beginning of period (in shares) 391,900 409,000.0
Granted (in shares) 131,900 142,800
Incremental performance shares (in shares) 41,100 41,300
Vested (in shares) (177,700) (189,300)
Forfeited (in shares) (3,200) (4,200)
Outstanding, end of period (in shares) 384,000.0 399,600
Vested, end of period (in shares) 110,200 108,500
Weighted Average Grant-Date Fair Value    
Outstanding, beginning of period, weighted-average grant-date fair value (in USD per share) $ 54.43 $ 47.17
Granted, weighted-average grant-date fair value (in USD per share) 69.87 61.73
Vested, weighted-average grant-date fair value (in USD per share) 46.19 41.81
Forfeited, weighted-average grant-date fair value (in USD per share) 58.16 54.92
Outstanding, end of period, weighted-average grant-date fair value (in USD per share) 62.43 54.18
Vested, end of period, weighted-average grant-date fair value (in USD per share) $ 38.77 $ 36.54