Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Cash flows from operating activities:
Net income (loss)	$ 78,232	$ 57,072	$ (6,957)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	16,666	14,492	14,210
Deferred income tax benefit	(49,376)	(479)	11
Impairment of Long-term marketable securities and Other current assets	0	0	2,600
Gain on sale of equity securities	(303)	(668)	(2,958)
Gain on sale of real estate	0	(720)	0
Stock-based compensation	6,356	4,551	4,576
Changes in assets and liabilities, net of acquisitions
Accounts receivable, net	4,553	(7,637)	(7,147)
Other receivable	0	0	60,000
Inventories	2,618	(11,408)	6,778
Prepaid expenses and other current assets	(1,367)	(3,613)	676
Foundry advances (includes advance credits)	0	11,475	20,082
Accounts payable and accrued expenses (includes restructuring)	(1,059)	6,747	6,312
Accrued payroll obligations	(2,281)	6,536	(1,575)
Deferred income and allowances on sales to sell-through distributors	(4,931)	5,532	4,419
Other liabilities	13,068	222	362
Net cash provided by operating activities	62,176	82,102	101,389
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	81,313	54,252	19,932
Purchase of marketable securities	(83,259)	(105,661)	(8,511)
Proceeds from sale of land	0	871	0
Acquisitions net of cash acquired	(45,645)	0	0
Payments for purchase of intangible assets	(18,500)	0	0
Capital expenditures	(13,001)	(13,856)	(7,030)
Acquisition of software licenses	(7,140)	(2,791)	(2,447)
Net cash (used in) provided by investing activities	(86,232)	(67,185)	1,944
Cash flows from financing activities:
Payment on yen line of credit	0	0	(805)
Net share settlement upon issuance of RSUs	(642)	(808)	(211)
Stock repurchase	(14,436)	(1,970)	(329)
Net proceeds from issuance of common stock	6,173	6,176	413
Net cash (used in) provided by financing activities	(8,905)	3,398	(932)
Net (decrease) increase in cash and cash equivalents	(32,961)	18,315	102,401
Beginning cash and cash equivalents	174,384	156,069	53,668
Ending cash and cash equivalents	141,423	174,384	156,069
Supplemental disclosures of non-cash investing and financing activities:
Unrealized gain (loss), net, related to marketable securities	(526)	581	1,031
Distribution of deferred compensation from trust assets	341	288	655
Tax effect of change in fair market value of auction rate securities	$ 0	$ (304)	$ 0