Pension Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Dec. 24, 2022 |
Dec. 25, 2021 |
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| Pension Benefits [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Interest cost | $ 827 | $ 559 |
| Expected return on plan assets | (339) | (354) |
| Amortization of net loss (gain) | 482 | 599 |
| Net periodic benefit cost | 970 | 804 |
| Postretirement Benefits [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Interest cost | 41 | 20 |
| Amortization of prior service credits | (124) | (124) |
| Amortization of net loss (gain) | (194) | (181) |
| Net periodic benefit cost | $ (277) | $ (285) |
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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. No definition available.
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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