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Postretirement Benefit Plans - Defined Contribution Plans - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 10,353,000 | $ 10,949,000 | $ 13,832,000
Percentage of union and non-union employees eligible for either statutory or Company's sponsored profit sharing contributions | 85.00% |  |
Percentage of us based union and non-union employees eligible for either statutory or Company's sponsored profit sharing contributions | 100.00% |  |
Statutory Plans [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 298,000 | 480,000 | $ 421,000
Defined Contribution Plans [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Balance of trust assets | $ 472,000 | $ 450,000 |

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- Definition Percentage of US based union and non union employees eligible for either Statutory or companys sponsored profit sharing contributions. + References No definition available. + Details
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- Definition Percentage of union and non-union employees eligible for either statutory or Company's sponsored profit sharing contributions. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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