Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Operating Activities
Net income	$ 29,586	$ 38,021	$ 49,819
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	12,517	12,561	13,491
Amortization of other intangible assets and other assets	29,131	17,923	15,911
Stock-based compensation expense	42,791	39,067	30,800
Income tax benefit (shortfall) from stock-based awards	469	489	(606)
Excess income tax benefit from stock-based awards	(2,497)	(632)	(290)
Deferred income taxes	(2,136)	3,054	3,319
Changes in operating assets and liabilities:
Accounts receivable	1,702	1,757	8,972
Inventories	2,093	(7,170)	5,588
Prepaid expenses and other assets	(870)	9,332	(2,514)
Accounts payable	6,662	11,475	(3,979)
Accrued expenses	1,682	27,671	463
Deferred income on shipments to distributors	(5,298)	7,809	(2,381)
Income taxes	776	(3,371)	5,189
Other non-current liabilities	(11,161)	(20,543)	(3,632)
Net cash provided by operating activities	105,447	137,443	120,150
Investing Activities
Purchases of available-for-sale investments	(107,366)	(166,094)	(213,883)
Proceeds from sales and maturities of available-for-sale investments	171,831	156,520	210,824
Purchases of property and equipment	(11,268)	(11,225)	(10,472)
Purchases of other assets	(6,399)	(5,514)	(5,939)
Acquisition of business, net of cash acquired	(96,112)		(86,441)
Net cash used in investing activities	(49,314)	(26,313)	(105,911)
Financing Activities
Proceeds from issuance of common stock, net of cash paid for withheld taxes	3,129	13,320	15,301
Excess income tax benefit from stock-based awards	2,497	632	290
Repurchases of common stock	(71,448)	(71,676)	(26,022)
Payment of acquisition-related contingent consideration	(4,464)
Proceeds from issuance of long-term debt, net	81,238
Payments on debt	(94,706)	(7,500)	(13,434)
Net cash used in financing activities	(83,754)	(65,224)	(23,865)
Increase (decrease) in cash and cash equivalents	(27,621)	45,906	(9,626)
Cash and cash equivalents at beginning of period	141,706	95,800	105,426
Cash and cash equivalents at end of period	114,085	141,706	95,800
Supplemental Disclosure of Cash Flow Information:
Interest paid	2,470	2,950	2,925
Income taxes paid	$ 2,157	$ 11,587	3,838
Supplemental Disclosure of Non-Cash Activity:
Stock issued in business combination			$ 19,248