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Share-Based Compensation - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Aggregate intrinsic value of stock options exercised |  | $ 39.6 |
Total fair value of stock options vested |  | 14.7 |
Expected future pre-tax compensation expense, nonvested stock options |  | $ 22.9 |
Weighted average period to recognize expected future pre-tax compensation expense |  | 2 years |
Nonvested restricted stock outstanding (in shares) |  | 300 |
Share-based payment arrangement, nonvested award, cost not yet recognized, amount |  | $ 13.5 |
Share-based payment award, options, outstanding (in shares) |  | 2,522 | 2,741
Non vested Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Nonvested stock options outstanding (in shares) |  | 700 |
Restricted Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average period to recognize expected future pre-tax compensation expense |  | 2 years |
Total fair value of vested restricted stock |  | $ 18.1 |
Expected future pre-tax compensation expense, nonvested restricted shares |  | $ 38.1 |
Nonvested restricted stock outstanding (in shares) |  | 295 | 296
Performance Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average period to recognize expected future pre-tax compensation expense |  | 1 year |
Nonvested restricted stock outstanding (in shares) |  | 239 | 239
Share-based payment award, options, outstanding (in shares) |  | 200 |
Officers And Key Management Employees | Performance Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Cliff vesting period | 3 years |  |
Minimum | Officers And Key Management Employees | Performance Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation, vesting rate | 0.00% |  |
Maximum | Officers And Key Management Employees | Performance Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based compensation, vesting rate | 200.00% |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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