Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Operating Activities
Net income	$ 35,472	$ 73,242	$ 73,092
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	13,570	11,797	11,887
Amortization of other intangible assets and other assets	11,030	7,494	7,842
Impairment of long-lived assets	1,322
Stock-based compensation expense	36,115	40,324	43,974
Income tax benefit from employee stock-based awards	2,814	3,295	2,422
Excess income tax benefit from employee stock-based awards	(2,404)	(2,412)	(1,862)
Deferred income taxes	(445)	(552)	1,896
Changes in operating assets and liabilities:
Accounts receivable	(8,562)	11,342	(19,657)
Inventories	5,334	(7,811)	(3,216)
Prepaid expenses and other assets	(5,948)	(5,300)	3,395
Accounts payable	(2,176)	(777)	8,036
Accrued expenses	(1,320)	(2,590)	(825)
Deferred income on shipments to distributors	(1,915)	(2,343)	6,871
Income taxes	5,855	(7,774)	(12,914)
Net cash provided by operating activities	88,742	117,935	120,941
Investing Activities
Purchases of available-for-sale investments	(178,676)	(357,777)	(237,968)
Proceeds from sales and maturities of marketable securities	193,474	352,779	153,275
Purchases of property and equipment	(8,690)	(13,850)	(8,943)
Purchases of other assets	(4,018)	(8,372)	(6,408)
Acquisitions of businesses, net of cash acquired	(27,262)	(28,021)	(4,300)
Net cash used in investing activities	(25,172)	(55,241)	(104,344)
Financing Activities
Proceeds from issuance of common stock, net of shares withheld for taxes	7,660	18,055	25,187
Excess income tax benefit from employee stock-based awards	2,404	2,412	1,862
Repurchases of common stock	(110,063)	(140,331)	(20,181)
Payments on debt	(7,174)
Net cash provided by (used in) financing activities	(107,173)	(119,864)	6,868
Increase (decrease) in cash and cash equivalents	(43,603)	(57,170)	23,465
Cash and cash equivalents at beginning of period	138,567	195,737	172,272
Cash and cash equivalents at end of period	94,964	138,567	195,737
Supplemental Disclosure of Cash Flow Information:
Interest paid	35	90	279
Income taxes paid	$ 8,241	$ 20,780	$ 4,500