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v3.24.0.1

Share-Based Compensation - Performance Restricted Stock Units Narrative (Details) shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) metric shares | Dec. 31, 2022 USD ($) entity shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 shares
PRSUs |  |  |  |
Share-based compensation |  |  |  |
Number of restricted stocks units granted (in shares) | shares | 282 | 341 | 189 |
Net reduction in number of awards with performance against target (in shares) | shares | 305 | 285 | 56 |
Unvested restricted stock units outstanding (in shares) | shares | 60 | 371 | 388 | 333
PRSUs | Executive and senior officers |  |  |  |
Share-based compensation |  |  |  |
Performance payout period | 1 year | 1 year |  |
Number of metrics | entity |  | 3 |  |
Average share price trading period |  | 20 days | 20 days |
Share price, last day in trading period |  | 20 days | 20 days |
Requisite service period | 5 years |  |  |
Recognized share-based compensation expense | $ | $ 0.7 | $ 1.2 | $ 1.4 |
Unrecognized compensation cost, net of estimated forfeitures, related to restricted stock unit awards | $ | $ 0.2 |  |  |
Weighted-average period over which unrecognized compensation cost is expected to be recognized | 1 year 6 months |  |  |
Income tax benefit recognized on share-based compensation | $ | $ 0.8 | $ 1.6 | $ 1.4 |
Vesting period | 4 years |  |  |
PRSUs | Executive and senior officers | Minimum |  |  |  |
Share-based compensation |  |  |  |
Target award percentage | 0.00% |  |  |
PRSUs | Executive and senior officers | Maximum |  |  |  |
Share-based compensation |  |  |  |
Target award percentage | 200.00% |  |  |
PRSUs | Executive Officer |  |  |  |
Share-based compensation |  |  |  |
Number of metrics | metric | 3 |  |  |
Restricted Stock Units |  |  |  |
Share-based compensation |  |  |  |
Number of restricted stocks units granted (in shares) | shares | 606 | 687 | 528 |
Unvested restricted stock units outstanding (in shares) | shares | 1,184 | 1,415 | 1,208 | 1,076
Recognized share-based compensation expense | $ | $ 4.9 | $ 3.7 | $ 3.5 |
Unrecognized compensation cost, net of estimated forfeitures, related to restricted stock unit awards | $ | $ 6.9 |  |  |
Weighted-average period over which unrecognized compensation cost is expected to be recognized | 2 years 6 months |  |  |
Vesting period | 4 years |  |  |
Restricted Stock Units | Executive and senior officers |  |  |  |
Share-based compensation |  |  |  |
Dividend yield |  | 0.00% |  |

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