Leases (Lease Costs) (Details) $ in Thousands	9 Months Ended
	Jun. 27, 2020 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 7,105
Operating cash flows from finance leases	46
Financing cash flows from finance leases	451
Operating leased assets obtained in exchange for new lease liabilities	$ 2,705