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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 28, 2022 | Feb. 28, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Stock-based compensation |  |  |  |
Shares tendered by employees to pay employee withholding taxes (in shares) |  |  | 126,851 |
Nonvested shares, share units or DEU |  |  |  |
Stock-based compensation |  |  |  |
Total fair value of shares vested |  |  | $ 16.3 | $ 16.0
Nonvested shares, share units |  |  |  |
Stock-based compensation |  |  |  |
Unrecognized compensation expense |  |  | $ 28.3 |
Expected weighted average period for recognition of expense |  |  | 2 years 3 months 18 days |
Certain members of senior management | Performance shares |  |  |  |
Stock-based compensation |  |  |  |
Incremental compensation expense |  | $ 4.0 |  |
Unrecognized compensation expense |  |  | $ 1.2 |
Expected weighted average period for recognition of expense |  |  | 10 months 24 days |
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan |  |  |  |
Stock-based compensation |  |  |  |
Performance period | 3 years |  |  |
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | First Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | Second Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Time-Based Share Awards | Certain members of senior management | Nonvested shares | 2013 Plan | Third Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance |  |  |  |
Stock-based compensation |  |  |  |
Award vesting period | 3 years |  |  |
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | First Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | Second Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Time-Based Share Awards | Employee | Share Units | Incentive program bonus award fiscal year performance | Third Vesting Period |  |  |  |
Stock-based compensation |  |  |  |
Vesting (as a percent) | 33.33% |  |  |
Vesting Based On Performance | Certain members of senior management | Nonvested shares | 2013 Plan |  |  |  |
Stock-based compensation |  |  |  |
Performance period | 3 years |  |  |
Vesting Based On Performance | Certain members of senior management | Nonvested shares | 2013 Plan | Maximum |  |  |  |
Stock-based compensation |  |  |  |
Vesting percent |  |  | 200.00% |

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- Definition Represents the period over which a performance condition to the award is measured, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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