Consolidated Statements of Cash Flows (USD $) In Thousands	12 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Sep. 27, 2009
Cash flows from operating activities:
Net income (loss)	$ 54,447	$ 59,038	$ (26,823)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	91,482	39,436	33,145
Provision for doubtful accounts	171	(324)	571
Impairment charges related to facility closures			6,185
In process research and development			1,310
Deferred income taxes	(19,442)	21,561	(18,610)
Valuation allowance on deferred income taxes	(21,604)	(15,616)	39,389
Charge for stock based compensation	28,465	25,277	26,933
Excess tax benefits-stock awards	(7,327)	(605)	(89)
Effect of fair value option on credit facility issuance and refinancing costs	14,218
Change in assets and liabilities (net of acquisitions and disposition):
Accounts receivable	9,692	(8,068)	46,450
Inventories	14,968	(20,295)	30,188
Other current assets	3,697	(1,669)	(6,229)
Other assets	6,201	1,320	(1,809)
Accounts payable	2,354	15,153	(17,048)
Accrued liabilities	(16,603)	(6,053)	(4,512)
Other long-term liabilities	(21,485)	(1,544)	(1,851)
Net cash provided by operating activities	139,234	107,611	107,200
Cash flows from investing activities:
Purchases of property and equipment	(25,826)	(16,224)	(12,625)
Proceeds from sale of available for sale securities		46,550	15,450
Proceeds from the divestiture or sale of assets	2,157		5,877
Payments for acquisitions, net of cash acquired	(436,849)	(112,370)	(55,856)
Net cash used in investing activities	(460,518)	(82,044)	(47,154)
Cash flows from financing activities:
Proceeds from (repayments of) auction rate securities credit facility		(46,550)	46,550
Repayments of credit facility	(52,814)
Credit facility issuance costs	(17,218)
Proceeds from credit facility	425,000
Repayment of note payable		(981)
Excess tax benefit from stock awards	7,327	365	89
Stock settled tax withholdings	(1,538)
Exercise proceeds from stock awards	27,208	4,807	2,860
Net cash (used in) provided by financing activities	387,965	(42,359)	49,499
Net increase (decrease) in cash and cash equivalents	66,681	(16,792)	109,545
Cash and cash equivalents at beginning of year	199,950	216,742	107,197
Cash and cash equivalents at end of year	266,631	199,950	216,742
Supplemental disclosure of cash flow information Cash paid during the year for:
Interest	12,625	790	340
Income taxes	$ 6,553	$ 8,398	$ 4,705