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Share-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 30, 2023
USD ($)
plan
$ / shares
shares
Jun. 30, 2022
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of share-based compensation plans (plan) | plan 2      
Compensation cost $ 16.4 $ 10.8 $ 10.4  
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost $ 0.5 $ 0.6 $ 1.1  
Weighted average grant date fair value (in dollars per share) | $ / shares $ 15.55 $ 12.39 $ 5.39  
Unvested stock option cost $ 0.2      
Stock option weighted average remaining life 7 months 6 days      
Options outstanding (in shares) | shares 1,808,174 1,962,589 2,075,753 2,149,541
Stock options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting period 1 year      
Stock options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting period 3 years      
Expiration term 10 years      
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost $ 6.1 $ 1.1 $ 1.6  
Performance Shares | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Target shares awarded percentage 0.00%      
Performance Shares | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Target shares awarded percentage 200.00%     100.00%
Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares) | shares 3,691,919      
Omnibus Plan | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares) | shares 1,501,154      
Omnibus Plan | Time-based restricted stock unit awards | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting period 1 year      
Omnibus Plan | Time-based restricted stock unit awards | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting period 3 years      
Omnibus Plan | Restricted stock unit awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost $ 8.6 8.0 6.6  
Unvested stock option cost $ 7.4      
Stock option weighted average remaining life 1 year 6 months      
Director's Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost $ 1.2 $ 1.1 $ 1.1  
Shares available for grant (in shares) | shares 204,798      
Shares vesting period 1 year      
Unvested stock option cost $ 0.3      
Stock option weighted average remaining life 3 months 18 days      
Percentage of Director's annual retainer paid in stock instead of cash 50.00%      
Percentage of Director's committee chair fees paid in stock instead of cash 100.00%      
Director's Plan | Every Three Months        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of shares vesting following grant date 25.00%      
Director's Plan | 1/4 of the units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock vesting period with reference to service term 3 months      
Director's Plan | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of Director's annual retainer paid in stock instead of cash 50.00%      
Director's Plan | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares) | shares 307,020