Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2012		Dec. 30, 2011
Operating activities:
Net income including controlling interest	$ 51,477		$ 73,366
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,129		9,929
Stock-based compensation	17,704	[1]	11,439	[1]
Amortization of premium on investments	3,794		4,920
Excess tax benefit from exercise of stock options	(469)		(57)
Provision for doubtful accounts	(179)		(52)
Deferred income taxes	(2,627)		(7,643)
Other non-cash items affecting net income	(691)		1,227
Changes in operating assets and liabilities:
Accounts receivable	(8,064)		7,531
Inventories	(6,173)		(7,271)
Prepaid expenses and other assets	8,625		1,101
Accounts payable and accrued liabilities	(19,898)		(22,860)
Income taxes, net	9,512		24,431
Deferred revenue	(143)		(661)
Other non-current liabilities	1,012		392
Net cash provided by operating activities	67,009		95,792
Investing activities:
Purchases of available-for-sale securities	(204,135)		(54,726)
Proceeds from sales of available-for-sale securities	389,068		51,488
Proceeds from maturities available-for-sale securities	51,325		47,645
Purchases of property, plant and equipment	(6,717)		(12,566)
Acquisitions, net of cash acquired	0		(575)
Other investments	(3,000)		0
Purchases of intangible assets	(4,048)		0
Proceeds from sales of property, plant and equipment and assets held for sale	19		335
Net cash provided by investing activities	222,512		31,601
Financing activities:
Proceeds from issuance of common stock	4,502		813
Repurchase of common stock	(53,956)		(26,068)
Payment of cash dividend	(408,206)		0
Distribution to controlling interest	(5,039)		0
Excess tax benefit from exercise of stock options	469		57
Shares repurchased for tax withholdings on vesting of restricted stock	(3,636)		970
Net cash used in financing activities	(465,866)		(24,228)
Effect of foreign exchange rate changes on cash and cash equivalents	(62)		(263)
Net increase in cash and cash equivalents	(176,407)		102,902
Cash and cash equivalents at beginning of period	492,600		551,512
Cash and cash equivalents at end of period	316,193		654,414
Supplemental disclosure:
Cash paid for income taxes	11,734		13,047
Cash paid for interest	$ 1		$ 36

[1] We also recognized $0.1 million and $0.1 million in the first quarter of fiscal 2013 and 2012, respectively, of tax benefit from certain exercises of incentive stock options and shares issued under our ESPP, which is not included in the table above.