Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Quarterly Financial Information Disclosure [Abstract]
Net Sales	$ 250,383	$ 242,630	$ 235,333	$ 247,598	$ 263,074	$ 259,195	$ 249,306	$ 240,920	$ 975,944	$ 1,012,495	$ 835,854
Gross profit	142,838	138,312	133,465	142,573	150,426	144,593	131,868	125,736	557,188	552,623	441,171
Net income (loss)	$ 14,086	$ 18,279	$ (2,905)	$ 14,214	$ 11,593	$ 8,126	$ (4,792)	$ (44,602)	$ 43,674	$ (29,675)	$ 55,730
Basic earnings (loss) per share	$ 0.16	$ 0.20	$ (0.03)	$ 0.16	$ 0.13	$ 0.09	$ (0.06)	$ (0.52)	$ 0.49	$ (0.35)	$ 0.66
Diluted earnings (loss) per share	$ 0.15	$ 0.20	$ (0.03)	$ 0.16	$ 0.13	$ 0.09	$ (0.06)	$ (0.52)	$ 0.48	$ (0.35)	$ 0.65

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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+ Details

- Definition

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.

+ References+ Details

- Definition

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

+ References

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-Appendix A

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+ Details