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. 30, 2021	Jun. 27, 2020	Jun. 30, 2021	Jun. 27, 2020
Earnings Per Share And Common Stock [Abstract]
Net income	$ 51,203	$ 34,678	$ 183,980	$ 77,289
Weighted-average shares outstanding—Basic	116,934	115,759	116,702	115,521
Dilutive effect of restricted stock units	1,677	470	1,479	460
Weighted-average shares outstanding—Diluted	118,611	116,229	118,181	115,981
Earnings per share—Basic	$ 0.44	$ 0.30	$ 1.58	$ 0.67
Earnings per share—Diluted	$ 0.43	$ 0.30	$ 1.56	$ 0.67