DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Earning Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jan. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010
BASIC
Net income (loss)	$ 11,593	$ 8,126	$ (4,792)	$ (44,602)	$ 43,376	$ 32,778	$ (19,128)	$ (1,296)	$ (29,675)	$ 55,730	$ 59,038
Weighted-average common shares outstanding									85,837	83,916	80,797
Basic earnings (loss) per share	$ 0.13	$ 0.09	$ (0.06)	$ (0.52)	$ 0.51	$ 0.39	$ (0.23)	$ (0.02)	$ (0.35)	$ 0.66	$ 0.73
DILUTED
Net income (loss)	$ 11,593	$ 8,126	$ (4,792)	$ (44,602)	$ 43,376	$ 32,778	$ (19,128)	$ (1,296)	$ (29,675)	$ 55,730	$ 59,038
Weighted-average common shares outstanding									85,837	83,916	80,797
Dilutive effect of stock awards									0	1,831	744
Weighted-average common shares outstanding on a diluted basis									85,837	85,747	81,541
Diluted earnings (loss) per share	$ 0.13	$ 0.09	$ (0.06)	$ (0.52)	$ 0.50	$ 0.38	$ (0.23)	$ (0.02)	$ (0.35)	$ 0.65	$ 0.72