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. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Earnings Per Share [Abstract]
Net income (loss)	$ 26,501	$ 25,579	$ (59,702)	$ 83,053
Basic weighted average common shares outstanding (in shares)	32,796	33,669	33,300	33,636
Dilutive effect of share-based awards outstanding (in shares)	855	899	0	949
Diluted weighted average shares outstanding (in shares)	33,651	34,568	33,300	34,585
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.81	$ 0.76	$ (1.79)	$ 2.47
Diluted (in dollars per share)	$ 0.79	$ 0.74	$ (1.79)	$ 2.40