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		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 24,801	$ 26,501	$ 71,785	$ (59,702)
Basic weighted average common shares outstanding (in shares)	29,912	32,796	30,637	33,300
Dilutive effect of share-based awards outstanding (in shares)	723	855	783	0
Diluted weighted average shares outstanding (in shares)	30,635	33,651	31,420	33,300
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.83	$ 0.81	$ 2.34	$ (1.79)
Diluted (in dollars per share)	$ 0.81	$ 0.79	$ 2.28	$ (1.79)