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v3.24.2

Share-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | $ 11.8 | $ 11.2 | $ 23.7 | $ 22.0
Weighted-average grant date fair value of SARs granted |  |  |  | $ 9.41 |
Total vesting date fair value of stock units |  | $ 10.6 | $ 2.8 | $ 17.1 | 22.8
Maximum [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total intrinsic value of awards exercised for SARs |  |  |  |  | $ 0.1
Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Performance stock unit awards vesting date |  |  |  | Mar. 31, 2025 |
Share-Based Payment Arrangement, Tranche Two [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Performance stock unit awards vesting date |  |  |  | Mar. 31, 2026 |
Share-Based Payment Arrangement, Tranche Three [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Performance stock unit awards vesting date |  |  |  | Mar. 31, 2027 |
SARs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Weighted-average grant date fair value of SARs granted |  | $ 4.94 | $ 6.09 | $ 4.51 | $ 6.71
SARs granted | [1] |  |  | 7,305 |
SARs exercised |  | 0 | 0 | 0 |
Service Condition Awards [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation cost on non-vested stock awards |  | $ 88.1 |  | $ 88.1 |
Unrecognized compensation cost on non-vested stock awards, weighted-average period of recognition |  |  |  | 1 year 10 months 24 days |
[1] | Includes 3.4 million performance condition SARs granted to a consultant

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