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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Oct. 01, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (80,719)	$ (36,695)	$ 130,826
Other comprehensive income:
Actuarial gains (losses) arising during the period	7,705	(9,856)	823
Amortization of actuarial losses and prior service cost reclassified to earnings	2,628	2,135	2,154
Other comprehensive income, before tax	10,333	(7,721)	2,977
Tax effect	(2,716)	2,036	(785)
Other comprehensive income (loss), net of taxes	7,617	(5,685)	2,192
Comprehensive (loss) income	$ (73,102)	$ (42,380)	$ 133,018

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