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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								12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Earnings Per Share [Abstract]
Net income	$ 72,742	$ 26,501	$ 12,290	$ (98,493)	$ 29,009	$ 25,579	$ 29,295	$ 28,179	$ 13,040	$ 112,062	$ 76,427
Basic weighted average common shares outstanding (in shares)									33,003	33,612	33,374
Dilutive effect of share-based awards outstanding (in shares)									916	941	724
Diluted weighted average shares outstanding (in shares)									33,919	34,553	34,098
Earnings per share:
Basic (in dollars per share)	$ 2.27	$ 0.81	$ 0.37	$ (2.93)	$ 0.86	$ 0.76	$ 0.87	$ 0.84	$ 0.40	$ 3.33	$ 2.29
Diluted (in dollars per share)	$ 2.20	$ 0.79	$ 0.36	$ (2.93)	$ 0.84	$ 0.74	$ 0.84	$ 0.82	$ 0.38	$ 3.24	$ 2.24

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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