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Schedule of Number Restricted Stock Units and Performance Shares (Detail) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restricted Stock Units (RSUs) |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Weighted average fair value at grant date | $ 112.16 | $ 91.81 | $ 87.56
Outstanding at beginning of year | 189,966 | 200,764 | 218,268
Granted | 64,601 | 96,243 | 85,985
Shares issued | (75,068) | (94,055) | (84,848)
Cancelled/Forfeited/Expired | (5,352) | (12,986) | (18,641)
Outstanding at end of year | 174,147 | 189,966 | 200,764
Performance Shares |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Weighted average fair value at grant date | $ 109.41 | $ 91.8 | $ 88.05
Outstanding at beginning of year | 111,881 | 101,828 | 179,311
Change in performance conditions | 147,022 | 18,211 | (69,924)
Granted | 79,712 | 93,962 | 82,914
Shares issued | (49,509) | (26,331) | (64,397)
Cancelled/Forfeited/Expired | (9,801) | (75,789) | (26,076)
Outstanding at end of year | 279,305 | 111,881 | 101,828

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options period increase decrease due to change in performance conditions. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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