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. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 36,831	$ 24,801	$ 24,758	$ 22,226	$ 72,742	$ 26,501	$ 12,290	$ (98,493)	$ 108,616	$ 13,040	$ 112,062
Basic weighted average common shares outstanding (in shares)									30,271	33,003	33,612
Dilutive effect of share-based awards and options outstanding (in shares)									803	916	941
Diluted weighted average shares outstanding (in shares)									31,074	33,919	34,553
Earnings per share:
Basic (in dollars per share)	$ 1.26	$ 0.83	$ 0.81	$ 0.71	$ 2.27	$ 0.81	$ 0.37	$ (2.93)	$ 3.59	$ 0.40	$ 3.33
Diluted (in dollars per share)	$ 1.23	$ 0.81	$ 0.79	$ 0.69	$ 2.20	$ 0.79	$ 0.36	$ (2.93)	$ 3.50	$ 0.38	$ 3.24