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		6 Months Ended
	Mar. 31, 2021	Mar. 28, 2020	Mar. 31, 2021	Mar. 28, 2020
Earnings Per Share And Common Stock [Abstract]
Net income	$ 109,262	$ 7,156	$ 132,777	$ 42,611
Weighted-average shares outstanding—Basic	116,777	115,606	116,587	115,401
Dilutive effect of restricted stock units	1,554	411	1,379	455
Weighted-average shares outstanding—Diluted	118,331	116,017	117,966	115,856
Earnings per share—Basic	$ 0.94	$ 0.06	$ 1.14	$ 0.37
Earnings per share—Diluted	$ 0.92	$ 0.06	$ 1.13	$ 0.37