Restructuring Charges - As a Component of Selling, General and Administrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Restructuring and Related Activities [Abstract]
Total restructuring charges, net	$ 2,645	$ 1,085	$ 2,865	$ 2,472