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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 25, 2017 | Sep. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized |  |  |  |  |  | 25,625,000
Number of shares, outstanding |  |  | 2,961,195 | 3,785,941 | 5,318,759 | 6,839,417
Number of shares available for grant |  |  | 6,800,000 | 1,000,000 |  |
Options, aggregate intrinsic value |  |  | $ 36.1 |  |  |
Options, exercisable, intrinsic value |  |  | $ 31.6 |  |  |
Common stock closing price (in dollars per share) |  |  | $ 34.12 |  |  |
Options outstanding and exercisable (in shares) |  |  | 1,700,000 |  |  |
Options exercised during period, intrinsic value |  |  | $ 46.7 | $ 68.6 | $ 35.3 |
Proceeds from stock options exercised |  |  | 13.7 | 18.4 | 12.4 |
Fair value of options granted |  |  | 23.2 | 7.5 | 5.6 |
Fair value of options vested |  |  | 11.7 | $ 5.2 | $ 5.5 |
Incremental stock-based compensation for accelerated vesting |  |  | $ 6.6 |  |  |
Common stock issuance ESPP plan (in shares) |  |  | 112,094 | 138,309 | 141,908 |
Employee Stock Option |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock compensation expense |  |  | $ 11.6 | $ 6.0 | $ 6.8 |
Unrecognized stock based compensation |  |  | $ 10.8 |  |  |
Unrecognized stock based compensation, weighted average period |  |  | 2 years 1 month 6 days |  |  |
Accelerated vesting (in shares) |  |  | 284,597 |  |  |
Incremental stock-based compensation for accelerated vesting |  |  | $ 4.9 |  |  |
Restricted Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock compensation expense |  |  | 9.8 | $ 3.4 | $ 2.6 |
Unrecognized stock based compensation |  |  | $ 24.3 |  |  |
Unrecognized stock based compensation, weighted average period |  |  | 2 years 7 months 6 days |  |  |
Granted (in shares) |  |  | 936,648 | 149,012 | 230,980 |
Fair value of shares granted during period (in dollars per share) |  |  | $ 39.52 | $ 28.45 | $ 19.93 |
Accelerated vesting (in shares) |  |  | 101,574 |  |  |
Incremental stock-based compensation for accelerated vesting |  |  | $ 1.7 |  |  |
Performance Shares |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |
Granted (in shares) |  | 356,548 |  |  |  |
Fair value of shares granted during period (in dollars per share) |  | $ 44.87 |  |  |  |
Employee Stock Purchase Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock compensation expense |  |  | $ 1.1 | $ 0.9 | $ 0.6 |
Discount from market price (as a percent) | 15.00% |  |  |  |  |
Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |
Minimum | Employee Stock Option |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Expiration period |  |  | 5 years |  |  |
Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 4 years |  |  |
Maximum | Employee Stock Option |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Expiration period |  |  | 7 years |  |  |

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