Earnings per Share (EPS) and Common Stock (Earnings per Share Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Earnings Per Share and Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1,725
Net income (loss)	$ 3,073	$ 17,435	$ (25,992)	$ 53,111
Weighted average shares outstanding—Basic (in shares)	114,795	114,764	114,499	115,021
Dilutive effect of employee stock options, restricted shares and restricted stock units (in shares)	903	1,261	0	1,309
Weighted average shares outstanding—Diluted (in shares)	115,698	116,025	114,499	116,330
Earnings(loss) per share—Basic (in USD per share)	$ 0.03	$ 0.15	$ (0.23)	$ 0.46
Earnings(loss) per share—Diluted (in USD per share)	$ 0.03	$ 0.15	$ (0.23)	$ 0.46