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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Stock-Based Compensation [Abstract]        
Stock-based compensation expense $ 2.4 $ 1.4 $ 3.6 $ 2.1
Stock-Based Compensation [Abstract]        
Unrecognized compensation expense 11.5   $ 11.5  
Weighted-average remaining service period     2 years 8 months 12 days  
Stock Options [Member]        
Type and fair value of stock-based compensation awards granted [Abstract]        
Options granted (in shares)     0.2  
Fair value of options granted (in dollars per share)     $ 8.98  
Assumptions for Stock Awards Granted [Abstract]        
Expected life of awards in years     6 years 1 month 6 days  
Risk-free interest rate     1.00%  
Expected volatility of the Company's stock     56.40%  
Expected dividend yield on the Company's stock     0.00%  
Stock-Based Compensation [Abstract]        
Unrecognized compensation expense 3.0   $ 3.0  
Weighted-average remaining service period     3 years  
Restricted Stock Awards [Member]        
Type and fair value of stock-based compensation awards granted [Abstract]        
Stock granted (in shares)     0.3  
Fair value of stock granted (in dollars per share)     $ 15.97  
Stock-Based Compensation [Abstract]        
Unrecognized compensation expense 8.2   $ 8.2  
Weighted-average remaining service period     2 years 8 months 12 days  
Unrestricted Stock Awards [Member]        
Type and fair value of stock-based compensation awards granted [Abstract]        
Stock granted (in shares)     0.1  
Fair value of stock granted (in dollars per share)     $ 15.93  
Performance Stock Awards [Member]        
Type and fair value of stock-based compensation awards granted [Abstract]        
Period of time to average cash flow return on invested capital     3 years  
Period of time to average EBITDA growth     3 years  
Performance period     3 years  
Stock-Based Compensation [Abstract]        
Unrecognized compensation expense $ 0.3   $ 0.3  
Weighted-average remaining service period     6 months