Supplemental Financial Information - Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Condensed Financial Information [Abstract]
Interest cost	$ 1,484	$ 1,509
Expected return on plan assets	(1,620)	(1,630)
Amortization of prior loss	172	299
Net periodic pension benefit expense	36	178
Amortization of prior loss, recognized in other comprehensive income	(172)	(299)
Total recognized in net periodic pension benefit expense and other comprehensive income	$ (136)	$ (121)