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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% |  |  |

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