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Share-Based Compensation - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) share-based_compensation_plan shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Feb. 28, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of share-based compensation plans (in shares) | share-based_compensation_plan | 2 |  |  |
Number of shares authorized (in shares) | shares | 15,600,000 |  |  |
Number of shares available for future issuance (in shares) | shares | 2,400,000 |  |  |
Proceeds from stock option exercises | $ 19.7 | $ 44.6 | $ 38.8 |
Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock option exercisable life | 10 years |  |  |
Total intrinsic value of options exercised | $ 21.4 | 41.3 | 49.5 |
Proceeds from stock option exercises | 19.7 | 44.6 | 38.8 |
Tax benefit realized for the tax deductions from stock options exercised | 4.5 | 8.7 | $ 10.4 |
Total unrecognized compensation cost | $ 9.7 |  |  |
Weighted-average period of total unrecognized compensation cost, in years | 1 year 2 months 12 days |  |  |
Stock Option | Employees |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 4 years |  |  |
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Total unrecognized compensation cost | $ 6.8 |  |  |
Weighted-average period of total unrecognized compensation cost, in years | 1 year |  |  |
Unvested shares, granted (in shares) | shares | 39,530 |  |  |
Cash-settled Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Share based compensation, accrued expenses | $ 5.9 | 5.4 |  |
Share based compensation, other noncurrent liabilities | $ 2.8 | $ 2.9 |  |
Unvested shares, granted (in shares) | shares | 22,385 |  |  |
Performance Shares Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total unrecognized compensation cost | $ 4.7 |  |  |
Weighted-average period of total unrecognized compensation cost, in years | 9 months 18 days |  |  |
Award requisite service period | 3 years |  |  |
Unvested shares, granted (in shares) | shares | 29,020 | 42,690 | 56,860 |
Payout factor, percent | 143.00% |  |  |
Performance Shares Units | Forecast |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares issued (in shares) | shares |  |  |  | 42,688
Performance Shares Units | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Target award | 0.00% |  |  |
Performance Shares Units | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Target award | 250.00% |  |  |
Target payout | 100.00% |  |  |

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