Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Operating Activities
Net income	$ 61,494	$ 29,586	$ 38,021
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	13,216	12,517	12,561
Amortization of other intangible assets and other assets	27,715	29,131	17,923
Stock-based compensation expense	39,628	42,791	39,067
Income tax benefit (shortfall) from stock-based awards	(1,099)	469	489
Excess income tax benefit from stock-based awards	(572)	(2,497)	(632)
Deferred income taxes	(4,087)	(2,136)	3,054
Changes in operating assets and liabilities:
Accounts receivable	46	1,702	1,757
Inventories	(6,093)	2,093	(7,170)
Prepaid expenses and other assets	(3,568)	(870)	9,332
Accounts payable	263	6,662	11,475
Accrued expenses	5,919	1,682	27,671
Deferred income on shipments to distributors	9,713	(5,298)	7,809
Income taxes	(3,040)	776	(3,371)
Other non-current liabilities	(10,625)	(11,161)	(20,543)
Net cash provided by operating activities	128,910	105,447	137,443
Investing Activities
Purchases of available-for-sale investments	(185,231)	(107,366)	(166,094)
Sales and maturities of available-for-sale investments	161,921	171,831	156,520
Purchases of property and equipment	(10,927)	(11,268)	(11,225)
Purchases of other assets	(8,801)	(6,399)	(5,514)
Acquisition of business, net of cash acquired	(6,546)	(96,112)
Net cash used in investing activities	(49,584)	(49,314)	(26,313)
Financing Activities
Proceeds from issuance of long-term debt, net		81,238
Payments on debt	(5,000)	(94,706)	(7,500)
Repurchases of common stock	(40,543)	(71,448)	(71,676)
Payment of taxes withheld for vested stock awards	(11,133)	(13,869)	(9,622)
Proceeds from the issuance of common stock	13,299	16,998	22,942
Excess income tax benefit from stock-based awards	572	2,497	632
Payment of acquisition-related contingent consideration	(9,500)	(4,464)
Net cash used in financing activities	(52,305)	(83,754)	(65,224)
Increase (decrease) in cash and cash equivalents	27,021	(27,621)	45,906
Cash and cash equivalents at beginning of period	114,085	141,706	95,800
Cash and cash equivalents at end of period	141,106	114,085	141,706
Supplemental Disclosure of Cash Flow Information:
Interest paid	2,222	2,470	2,950
Income taxes paid	11,185	$ 2,157	$ 11,587
Supplemental Disclosure of Non-Cash Activity:
Stock issued in business combination	$ 4,181