Supplemental Financial Information - Pension Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Condensed Financial Information [Abstract]
Interest cost	$ 1,092	$ 1,057
Expected return on plan assets	(2,122)	(1,944)
Amortization of prior loss	291	465
Net periodic benefit income	(739)	(422)
Amortization of prior loss, recognized in other comprehensive income	(291)	(465)
Total recognized in net periodic pension benefit income and other comprehensive income	$ (1,030)	$ (887)