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
	Dec. 30, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net (loss) income	$ (98,493)	$ 28,179
Basic weighted average common shares outstanding (in shares)	33,567	33,534
Dilutive effect of share-based awards outstanding (in shares)	0	1,010
Diluted weighted average shares outstanding (in shares)	33,567	34,544
(Loss) earnings per share:
Basic (in dollars per share)	$ (2.93)	$ 0.84
Diluted (in dollars per share)	$ (2.93)	$ 0.82