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Stock-Based Compensation, Restricted Stock (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Compensation Expense [Abstract]      
Stock-based compensation expense (benefit) $ 6.6 $ 5.7 $ 6.3
Restricted Stock [Member]      
Compensation Expense [Abstract]      
Stock-based compensation expense (benefit) 5.4 5.0 4.3
Fair value of awards vesting 4.7 $ 4.4 4.5
Unrecognized compensation costs $ 6.4    
Weighted average period recognized 1 year 9 months 18 days    
Restricted Stock Activity [Roll Forward]      
Non-vested balance, beginning of year (in shares) 0.7    
Granted (in shares) 0.5    
Vested (in shares) (0.3)    
Forfeited (in shares) (0.1)    
Non-vested balance, end of year (in shares) 0.8 0.7  
Weighted Average Price [Rollforward]      
Non-vested balance, beginning of year (in dollars per share) $ 11.61    
Granted (in dollars per share) 13.6    
Vested (in dollars per share) 11.85    
Forfeited (in dollars per share) 10.58    
Non-vested balance, end of year (in dollars per share) $ 12.95 $ 11.61  
Restricted Stock [Member] | Awards Granted in Fiscal 2023 [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Award vesting period 3 years    
Restricted Stock [Member] | Awards Granted in Fiscal 2023 [Member] | Tranche One [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 33.00%    
Restricted Stock [Member] | Awards Granted in Fiscal 2023 [Member] | Tranche Two [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 33.00%    
Restricted Stock [Member] | Awards Granted in Fiscal 2023 [Member] | Tranche Three [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 34.00%    
Restricted Stock [Member] | Awards Granted Prior to Fiscal 2023 [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Award vesting period 4 years    
Restricted Stock [Member] | Awards Granted Prior to Fiscal 2023 [Member] | Tranche One [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 25.00%    
Restricted Stock [Member] | Awards Granted Prior to Fiscal 2023 [Member] | Tranche Two [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 25.00%    
Restricted Stock [Member] | Awards Granted Prior to Fiscal 2023 [Member] | Tranche Three [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 25.00%    
Restricted Stock [Member] | Awards Granted Prior to Fiscal 2023 [Member] | Tranche Four [Member]      
Assumptions for Stock Awards Granted [Abstract]      
Annual vesting percentage 25.00%    
Performance Stock Awards [Member]      
Compensation Expense [Abstract]      
Stock-based compensation expense (benefit)   $ (0.4) $ 1.1
Unrecognized compensation costs $ 0.0    
Assumptions for Stock Awards Granted [Abstract]      
Award vesting period 3 years    
Weighted Average Price [Rollforward]      
Performance period 3 years    
Period of time to average cash flow return on invested capital 3 years    
Period of time to average revenue growth 3 years    
Period of time to average EBITDA growth 3 years