Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Basic:
Net income	$ 27,189	$ 17,382	[1]
Weighted-average shares outstanding - Basic (shares)	63,316	62,642	[1]
Basic earnings per share	$ 0.43	$ 0.28	[1]
Diluted:
Effect of dilutive securities: Stock options	2,673	3,278
Weighted-average shares outstanding - diluted	65,989	65,920	[1]
Diluted earnings per share	$ 0.41	$ 0.26	[1]

[1] * Adjusted due to the adoption of ASU 2017-07 Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. See Note 1, ''Basis of Presentation and Summary of Significant Accounting Policies'' for additional information.