Earnings per Share (EPS) and Common Stock (Earnings per Share Basic and Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Apr. 04, 2015	Mar. 29, 2014
Earnings Per Share and Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				200,000
Net income	$ 5,392	$ 43,756	$ 35,676	$ 83,413
Weighted average shares outstanding—Basic (in shares)	114,944,000	118,978,000	115,147,000	118,973,000
Dilutive effect of employee stock options, restricted shares and restricted stock units (in shares)	978,000	1,720,000	1,332,000	1,943,000
Weighted average shares outstanding—Diluted (in shares)	115,922,000	120,698,000	116,479,000	120,916,000
Earnings per share—Basic (in USD per share)	$ 0.05	$ 0.37	$ 0.31	$ 0.70
Earnings per share—Diluted (in USD per share)	$ 0.05	$ 0.36	$ 0.31	$ 0.69