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Retirement and Pension Plans - Schedule of Components of Net Periodic Pension Benefit Expense (Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Defined benefit plans: |  |  |  |
Service cost | $ 505 | $ 596 | $ 1,011 | $ 1,168
Interest cost | 7,121 | 7,325 | 14,253 | 14,500
Expected return on plan assets | (14,441) | (13,236) | (28,894) | (26,330)
Amortization of net actuarial loss and other | 1,469 | 2,066 | 2,941 | 4,085
Pension income | (5,346) | (3,249) | (10,689) | (6,577)
Other plans: |  |  |  |
Defined contribution plans | 13,120 | 11,187 | 26,599 | 23,691
Foreign plans and other | 1,857 | 1,184 | 3,601 | 2,988
Total other plans | 14,977 | 12,371 | 30,200 | 26,679
Total net pension expense | $ 9,631 | $ 9,122 | $ 19,511 | $ 20,102

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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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