Consolidated Statements Of Cash Flows (USD $) In Thousands	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Cash flows from operating activities:
Net income	$ 226,585	$ 137,294	$ 94,983
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	58,338	40,741	23,466
Depreciation	59,788	46,573	44,413
Amortization of intangible assets	16,742	6,136	6,118
Amortization of discount and deferred financing costs on convertible debt	1,434	2,693	5,589
Contribution of common shares to savings and retirement plans	13,718	11,706	8,502
Non-cash restructuring (income) expense	(17)	0	955
Deferred income taxes	12,370	38,543	(24,866)
Excess tax benefit from share-based payments	(12,490)	(6,287)	0
Loss on disposals of assets	234	292	411
Inventory write-downs	0	0	3,458
Asset impairments	0	0	5,616
Provision for (recoveries) losses on accounts receivable	(220)	703	1,797
Changes in assets and liabilities net of acquired balances:
Receivables	13,168	(60,901)	29,947
Inventory	(49,694)	(38,818)	15,678
Other current and long-term assets	(1,732)	(8,349)	(3,932)
Accounts payable	(14,350)	42,869	9,219
Other current and long-term liabilities	41,944	9,767	(2,549)
Net cash provided by operating activities	365,818	222,962	218,805
Cash flows from investing activities:
Capital expenditures	(100,660)	(88,929)	(39,172)
Payments for acquisitions, net of cash acquired	(249,284)	(6,400)	(10,356)
Net cash used in investing activities	(349,944)	(95,329)	(49,528)
Cash flows from financing activities:
Retirement of 2007 Convertible Notes	0	(51,107)	(51,107)
Reacquisition of equity component of 2007 Convertible Notes	0	(29,602)	(15,432)
Payments to retire short term line of credit	(50,000)	0	0
Excess tax benefit from share-based payments	12,490	6,287	0
Change in restricted cash	5,416	(265)	100
Repurchase of common stock - payroll tax withholdings on equity awards	(20,092)	(4,412)	(2,389)
Repurchase of common stock - share repurchase program	(70,043)	0	0
Net proceeds from exercise of stock options	63,185	40,502	38,668
Net cash used in financing activities	(59,044)	(38,597)	(30,160)
Net (decrease) increase in cash and cash equivalents	(43,170)	89,036	139,117
Cash and cash equivalents at beginning of period	453,257	364,221	225,104
Cash and cash equivalents at end of period	410,087	453,257	364,221
Supplemental cash flow disclosures:
Income taxes paid	16,094	14,757	1,009
Interest paid	$ 475	$ 715	$ 2,323