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Pension and Other Postretirement Obligations (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 29, 2026 | Mar. 30, 2025
Pension Obligations |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | $ 808 | $ 762
Interest cost | 3,909 | 3,768
Expected return on plan assets | (4,031) | (3,824)
Amortization of prior service cost | 79 | 37
Actuarial losses (gains) | 355 | 319
Net periodic benefit cost | 1,120 | 1,062
Other Postretirement Obligations |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost | 8 | 7
Interest cost | 228 | 223
Expected return on plan assets | 0 | 0
Amortization of prior service cost | 0 | 0
Actuarial losses (gains) | (84) | (82)
Net periodic benefit cost | $ 152 | $ 148

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