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Stock-Based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) - $ / shares
 3 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Shares    
Outstanding, beginning of period (in shares) 409,000.0 440,900
Granted (in shares) 142,800 134,000.0
Incremental performance shares (in shares) 41,300 42,400
Vested (in shares) (189,300) (222,400)
Forfeited (in shares) (4,200)  
Outstanding, end of period (in shares) 399,600 394,900
Vested, end of period (in shares) 108,500 108,500
Weighted Average Grant-Date Fair Value    
Outstanding, beginning of period, weighted-average grant-date fair value (in USD per share) $ 47.17 $ 38.45
Granted, weighted-average grant-date fair value (in USD per share) 61.73 54.47
Vested, weighted-average grant-date fair value (in USD per share) 41.81 32.05
Forfeited, weighted-average grant-date fair value (in USD per share) 54.92  
Outstanding, end of period, weighted-average grant-date fair value (in USD per share) 54.18 46.65
Vested, end of period, weighted-average grant-date fair value (in USD per share) $ 36.54 $ 36.54