Restructuring Charges - As a Component of Selling, General and Administrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Restructuring and Related Activities [Abstract]
Total restructuring charges, net	$ 474	$ 709	$ 3,339	$ 3,181