Earnings per Share (EPS) and Common Stock - Earnings per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Earnings Per Share And Common Stock [Abstract]
Net income (loss)	$ 34,678	$ (14,758)	$ 77,289	$ (37,286)
Weighted-average shares outstanding—Basic	115,759	116,133	115,521	117,636
Dilutive effect of restricted stock units	470	0	460	0
Weighted-average shares outstanding—Diluted	116,229	116,133	115,981	117,636
Earnings (loss) per share—Basic	$ 0.30	$ (0.13)	$ 0.67	$ (0.32)
Earnings (loss) per share—Diluted	$ 0.30	$ (0.13)	$ 0.67	$ (0.32)