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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
May 31, 2023
Feb. 28, 2023
Jan. 31, 2023
Sep. 30, 2023
Sep. 30, 2022
Stock-based compensation          
Shares tendered by employees to pay employee withholding taxes (in shares)       114,471  
Nonvested Shares, Share Units or DEU          
Stock-based compensation          
Total fair value of shares vested       $ 14.6 $ 17.3
Nonvested Shares or Share Units Outstanding          
Stock-based compensation          
Total unrecognized compensation expense       $ 31.2  
Expected weighted average period for recognition of expense       2 years 7 months 6 days  
Time-Based Share Awards | Employee | Share Units | Incentive Program Bonus Award Fiscal Year Performance          
Stock-based compensation          
Vesting period     3 years    
Time-Based Share Awards | Employee | Share Units | Incentive Program Bonus Award Fiscal Year Performance | First Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
Time-Based Share Awards | Employee | Share Units | Incentive Program Bonus Award Fiscal Year Performance | Second Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
Time-Based Share Awards | Employee | Share Units | Incentive Program Bonus Award Fiscal Year Performance | Third Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
2013 Plan          
Stock-based compensation          
Increase in number of shares authorized (in shares) 2,000,000        
Shares authorized (in shares)       5,600,000  
Number of share available for future grant (in shares)       3,800,000  
2013 Plan | Time-Based Share Awards | Certain Senior Management | Nonvested Shares          
Stock-based compensation          
Performance period   3 years      
2013 Plan | Time-Based Share Awards | Certain Senior Management | Nonvested Shares | First Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
2013 Plan | Time-Based Share Awards | Certain Senior Management | Nonvested Shares | Second Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
2013 Plan | Time-Based Share Awards | Certain Senior Management | Nonvested Shares | Third Vesting Date          
Stock-based compensation          
Vesting percentage   33.33%      
2013 Plan | Vesting Based On Performance | Certain Senior Management | Nonvested Shares          
Stock-based compensation          
Performance period   3 years      
2013 Plan | Vesting Based On Performance | Certain Senior Management | Nonvested Shares | Maximum          
Stock-based compensation          
Vesting percentile   200.00%