Earnings Per Share - Reconciliation of Amounts Utilized in Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 24,758	$ 12,290	$ 46,984	$ (86,203)
Basic weighted average common shares outstanding (in shares)	30,603	33,538	31,003	33,552
Dilutive effect of share-based awards outstanding (in shares)	782	849	833	0
Diluted weighted average shares outstanding (in shares)	31,385	34,387	31,836	33,552
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.81	$ 0.37	$ 1.52	$ (2.57)
Diluted (in dollars per share)	$ 0.79	$ 0.36	$ 1.48	$ (2.57)