v3.24.1.1.u2
Stock-Based Compensation, Stock Options (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Stock Options [Abstract]      
Stock-based compensation expense $ 10.8 $ 6.6 $ 5.7
Stock Options [Member]      
Stock Options [Abstract]      
Stock-based compensation expense 1.0 1.2 1.1
Fair value of awards vesting 1.2 $ 1.0 $ 0.9
Unrecognized compensation costs $ 1.1    
Weighted average period recognized 1 year 2 months 12 days    
Assumptions for Stock Awards Granted [Abstract]      
Fair value of options (in dollars per share)   $ 6.99 $ 8.79
Expected life of awards in years   6 years 6 years 1 month 6 days
Risk-free interest rate   3.00% 1.10%
Expected volatility of the Company's stock   57.80% 56.50%
Expected dividend yield on the Company's stock   0.00% 0.00%
Award vesting period   3 years 4 years
Stock Options Activity [Rollforward]      
Outstanding, beginning of year (in shares) 0.9    
Granted (in shares) 0.0    
Exercised (in shares) (0.2)    
Forfeited or expired (in shares) (0.1)    
Outstanding, end of year (in shares) 0.6 0.9  
Exercisable, end of year (in shares) 0.4    
Weighted Average Exercise Price [Rollforward]      
Outstanding, beginning of year (in dollars per share) $ 12.28    
Granted (in dollars per share) 0    
Exercised (in dollars per share) 11.08    
Forfeited or expired (in dollars per share) 11.13    
Outstanding, end of year (in dollars per share) 12.78 $ 12.28  
Exercisable, end of year (in dollars per share) $ 13    
Weighted-Average Remaining Contractual Term [Abstract]      
Weighted average remaining contractual term, outstanding at end of year 6 years 8 months 12 days    
Weighted average remaining contractual term, exercisable at end of year 6 years 2 months 12 days    
Aggregate Intrinsic Value [Abstract]      
Aggregate intrinsic value, outstanding at end of year $ 51.9    
Aggregate intrinsic value, exercisable at end of year 29.8    
Additional Information Related to Stock Options Exercised [Abstract]      
Intrinsic value of stock options exercised 12.4 $ 1.5 $ 0.1
Proceeds from stock options exercised $ 2.6 $ 2.9 $ 1.4
Stock Options [Member] | Maximum [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Stock option term 10 years    
Stock Options [Member] | Tranche One [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage   33.00% 25.00%
Stock Options [Member] | Tranche Two [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage   33.00% 25.00%
Stock Options [Member] | Tranche Three [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage   34.00% 25.00%
Stock Options [Member] | Tranche Four [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage     25.00%