Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Operating Activities
Net income	$ 38,021	$ 49,819	$ 63,548
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	12,561	13,491	13,621
Net gain on the purchase of property and equipment			(8,457)
Amortization of other intangible assets and other assets	17,923	15,911	14,154
Impairment of long-lived assets			708
Stock-based compensation expense	39,067	30,800	31,176
Income tax benefit (shortfall) from stock-based awards	489	(606)	1,827
Excess income tax benefit from stock-based awards	(632)	(290)	(1,294)
Deferred income taxes	3,054	3,319	4,725
Changes in operating assets and liabilities:
Accounts receivable	1,757	8,972	(20,743)
Inventories	(7,170)	5,588	(13,056)
Prepaid expenses and other assets	9,332	(2,514)	10,629
Accounts payable	11,475	(3,979)	7,217
Accrued expenses	27,671	463	3,247
Deferred income on shipments to distributors	7,809	(2,381)	4,623
Income taxes	(3,371)	5,189	(7,816)
Other non-current liabilities	(20,543)	(3,632)	(7,059)
Net cash provided by operating activities	137,443	120,150	97,050
Investing Activities
Purchases of available-for-sale investments	(166,094)	(213,883)	(192,450)
Proceeds from sales and maturities of available-for-sale investments	156,520	210,824	235,517
Purchases of property and equipment	(11,225)	(10,472)	(102,043)
Purchases of other assets	(5,514)	(5,939)	(8,508)
Acquisitions of businesses, net of cash acquired		(86,441)	(71,852)
Net cash used in investing activities	(26,313)	(105,911)	(139,336)
Financing Activities
Proceeds from issuance of common stock, net of shares withheld for taxes	13,320	15,301	15,148
Excess income tax benefit from stock-based awards	632	290	1,294
Repurchases of common stock	(71,676)	(26,022)	(62,019)
Proceeds from issuance of long-term debt, net			98,325
Payments on debt	(7,500)	(13,434)
Net cash used in financing activities	(65,224)	(23,865)	52,748
Increase (decrease) in cash and cash equivalents	45,906	(9,626)	10,462
Cash and cash equivalents at beginning of period	95,800	105,426	94,964
Cash and cash equivalents at end of period	141,706	95,800	105,426
Supplemental Disclosure of Cash Flow Information:
Interest paid	2,950	2,925	677
Income taxes paid	11,587	3,838	23,564
Supplemental Disclosure of Non-Cash Activity:
Stock issued in business combination		$ 19,248