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Pension and other postretirement benefits - Amounts recognized in consolidated balance sheet (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Payroll and benefit-related liabilities | $ (151,263) | $ (146,535)
Pension and postretirement benefit liabilities | (20,185) | (23,989)
Pension |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Other assets | 477 | 27,370
Payroll and benefit-related liabilities | (1,117) | (1,439)
Pension and postretirement benefit liabilities | (13,935) | (15,815)
Accumulated other comprehensive loss (gain) | 12,677 | 164,139
Amounts recognized in balance sheet | (1,898) | 174,255
Other Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Other assets | 0 | 0
Payroll and benefit-related liabilities | (1,025) | (1,361)
Pension and postretirement benefit liabilities | (6,250) | (8,174)
Accumulated other comprehensive loss (gain) | (13,730) | (14,244)
Amounts recognized in balance sheet | $ (21,005) | $ (23,779)

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (j) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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