Leases (Supplemental Cash Flow Information Schedule) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 24, 2021	Sep. 25, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 19,173	$ 22,043
Right-of-use assets obtained in exchange for lease obligations:
Operating lease liabilities	$ 5,225	$ 34,198