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Pension Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2025	Mar. 30, 2024	Mar. 29, 2025	Mar. 30, 2024
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 647	$ 804	$ 1,293	$ 1,609
Expected return on plan assets	(330)	(314)	(659)	(629)
Amortization of net loss (gain)	61	426	123	851
Net periodic benefit cost	378	916	757	1,831
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	25	36	50	72
Amortization of prior service credits	(7)	(65)	(13)	(130)
Amortization of net loss (gain)	(171)	(192)	(343)	(383)
Net periodic benefit cost	$ (153)	$ (221)	$ (306)	$ (441)

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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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.

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Amount of cost recognized for passage of time related to defined benefit plan.

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