Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

v3.23.3
Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 16, 2023
tranche
shares
May 31, 2022
Feb. 28, 2021
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2022
USD ($)
shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, options, grants in period, gross | shares           0 0
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value           $ 0.2 $ 10.2
Share-based compensation arrangement by share-based payment award, options, exercisable, aggregate intrinsic value       $ 0.0 $ 1.0 0.0 1.0
Stock-based compensation expense       2.1 $ 9.8 11.9 $ 34.3
Share-based payment arrangement, nonvested award, cost not yet recognized, amount       21.6   $ 21.6  
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition (in years)           2 years 1 month 6 days  
Market-based Stock Options              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, options, grants in period, gross | shares     203,434        
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average exercise price (in dollars per share) | $ / shares     $ 18.85        
Vesting rights, percentage     100.00%        
Share-based compensation arrangement by share-based payment award, options, grant date, fair value     $ 5.5        
Stock-based compensation expense     $ 4.6        
Employee Stock              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, maximum employee contributions, percentage of eligible compensation   0.20          
Restricted stock units              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Granted (in shares) | shares           3,895,883  
Restricted stock units | Chief Executive Officer              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Stock-based compensation expense       0.1      
Granted (in shares) | shares 850,000            
Share-based payment arrangement, number of tranches | tranche 4            
Share-based payment arrangement, award vesting period 4 years            
Share-based payment arrangement, fair value       $ 2.0   $ 2.0  
Restricted stock units | Chief Executive Officer | Share-Based Payment Arrangement, Tranche One              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Vesting rights, percentage 25.00%            
Restricted stock units | Chief Executive Officer | Share-Based Payment Arrangement, Tranche Two              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Vesting rights, percentage 25.00%            
Restricted stock units | Chief Executive Officer | Share-Based Payment Arrangement, Tranche Three              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Vesting rights, percentage 25.00%            
Restricted stock units | Chief Executive Officer | Share-Based Payment Arrangement, Tranche Four              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Vesting rights, percentage 25.00%