Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
Cash flows from operating activities:
Net income	$ 37,287	$ 43,193
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,598	10,642
Gain on sale or maturity of marketable securities, net	(385)	(416)
Gain on sale of land	0	(720)
Stock-based compensation	4,768	3,505
Changes in assets and liabilities:
Accounts receivable, net	(12,294)	(15,666)
Inventories	2,212	(5,756)
Prepaid expenses and other assets	(14,659)	(3,525)
Foundry advances (includes advance credits)	0	11,446
Accounts payable and accrued expenses (includes restructuring)	8,056	6,488
Accrued payroll obligations	(1,389)	6,743
Deferred income and allowances on sales to sell-through distributors	3,389	8,017
Other liabilities	4,536	337
Net cash provided by operating activities	44,119	64,288
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	74,312	40,813
Purchase of marketable securities	(69,706)	(91,150)
Proceeds from sale of excess real estate	0	874
Capital expenditures	(8,690)	(8,531)
Goodwill	(897)	0
Net cash used in investing activities	(4,981)	(57,994)
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(597)	(655)
Purchase of treasury stock	(12,789)	0
Net proceeds from issuance of common stock	4,784	4,926
Net cash (used in) provided by financing activities	(8,602)	4,271
Net increase in cash and cash equivalents	30,536	10,565
Beginning cash and cash equivalents	174,384	156,069
Ending cash and cash equivalents	204,920	166,634
Supplemental disclosures of non-cash investing and financing activities:
Unrealized (loss) gain on assets measured at fair value, net, included in Accumulated other comprehensive income	(8)	4
Distribution of deferred compensation from trust assets	277	227
Retirement of treasury stock	$ (12,789)	$ (326)