Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Operating Activities
Net income	$ 49,819	$ 63,548	$ 35,472
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	13,491	13,621	13,570
Net gain on the purchase of property and equipment		(8,457)
Amortization of other intangible assets and other assets	15,911	14,154	11,030
Impairment of long-lived assets		708	1,322
Stock-based compensation expense	30,800	31,176	36,115
Income tax benefit (detriment) from employee stock-based awards	(606)	1,827	2,814
Excess income tax benefit from employee stock-based awards	(290)	(1,294)	(2,404)
Deferred income taxes	3,319	4,725	(445)
Changes in operating assets and liabilities:
Accounts receivable	8,972	(20,743)	(8,562)
Inventories	5,588	(13,056)	5,334
Prepaid expenses and other assets	(2,514)	10,629	(5,948)
Accounts payable	(3,979)	7,217	(2,176)
Accrued expenses	(3,169)	(3,812)	(1,320)
Deferred income on shipments to distributors	(2,381)	4,623	(1,915)
Income taxes	5,189	(7,816)	5,855
Net cash provided by operating activities	120,150	97,050	88,742
Investing Activities
Purchases of available-for-sale investments	(213,883)	(192,450)	(178,676)
Proceeds from sales and maturities of available-for-sale investments	210,824	235,517	193,474
Purchases of property and equipment	(10,472)	(102,043)	(8,690)
Purchases of other assets	(5,939)	(8,508)	(4,018)
Acquisitions of businesses, net of cash acquired	(86,441)	(71,852)	(27,262)
Net cash used in investing activities	(105,911)	(139,336)	(25,172)
Financing Activities
Proceeds from issuance of common stock, net of shares withheld for taxes	15,301	15,148	7,660
Excess income tax benefit from employee stock-based awards	290	1,294	2,404
Repurchases of common stock	(26,022)	(62,019)	(110,063)
Proceeds from issuance of long-term debt, net		98,325
Payments on debt	(13,434)		(7,174)
Net cash provided by (used in) financing activities	(23,865)	52,748	(107,173)
Increase (decrease) in cash and cash equivalents	(9,626)	10,462	(43,603)
Cash and cash equivalents at beginning of period	105,426	94,964	138,567
Cash and cash equivalents at end of period	95,800	105,426	94,964
Supplemental Disclosure of Cash Flow Information:
Interest paid	2,925	677	35
Income taxes paid	3,838	23,564	8,241
Supplemental Disclosure of Non-Cash Activity:
Stock issued in business combination	$ 19,248