CONSOLIDATED INCOME STATEMENTS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010
Income Statement [Abstract]
Net sales	$ 1,012,495	$ 835,854	$ 518,268
Cost of sales	459,872	394,683	270,057
Gross profit	552,623	441,171	248,211
Operating expenses:
Selling, general and administrative	212,338	187,529	114,663
Research and development costs	168,516	114,155	55,395
Amortization of intangible assets	104,756	62,425	20,165
Restructuring and severance charges	8,666	22,081	2,107
Total operating expenses	494,276	386,190	192,330
Operating income	58,347	54,981	55,881
Other income (expenses):
Interest expense	(39,861)	(16,654)	(756)
Interest income	308	383	432
Other, net	(33,519)	(16,661)	(526)
Total other expense	(73,072)	(32,932)	(850)
Income (loss) before income taxes	(14,725)	22,049	55,031
Provision (benefit) for income taxes	14,950	(33,681)	(4,007)
Net income (loss)	(29,675)	55,730	59,038
Earnings (loss) per share:
Basic	$ (0.35)	$ 0.66	$ 0.73
Diluted	$ (0.35)	$ 0.65	$ 0.72
Weighted-average common shares outstanding:
Basic	85,837	83,916	80,797
Diluted	85,837	85,747	81,541
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Translation adjustment	(373)	332	(78)
Unrealized actuarial loss on pension benefits	(1,156)	0	0
Other comprehensive income (loss)	(1,529)	332	(78)
Total comprehensive income (loss)	$ (31,204)	$ 56,062	$ 58,960