Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014
Operating Activities
Net income	$ 23,928	$ 27,997
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	9,293	9,512
Amortization of other intangible assets and other assets	21,686	13,090
Stock-based compensation expense	30,798	28,173
Income tax benefit from stock-based awards	1,727	413
Excess income tax benefit from stock-based awards	(2,118)	(654)
Deferred income taxes	1,571	3,894
Changes in operating assets and liabilities:
Accounts receivable	12,097	769
Inventories	2,259	(1,591)
Prepaid expenses and other assets	8,409	12,627
Accounts payable	(5,686)	5,074
Accrued expenses	(280)	28,756
Deferred income on shipments to distributors	(2,825)	6,215
Income taxes	(3,413)	(4,898)
Other non-current liabilities	(10,031)	(21,790)
Net cash provided by operating activities	87,415	107,587
Investing Activities
Purchases of available-for-sale investments	(55,433)	(137,373)
Proceeds from sales and maturities of available-for-sale investments	136,262	100,009
Purchases of property and equipment	(7,281)	(5,500)
Purchases of other assets	(5,291)	(3,339)
Acquisition of business, net of cash acquired	(76,899)
Net cash used in investing activities	(8,642)	(46,203)
Financing Activities
Proceeds from issuance of common stock, net of cash paid for withheld taxes	(77)	8,559
Excess income tax benefit from stock-based awards	2,118	654
Repurchases of common stock	(71,448)	(50,942)
Payment of acquisition-related contingent consideration	(4,464)
Proceeds from issuance of long-term debt, net	81,238
Payments on debt	(92,206)	(3,750)
Net cash used in financing activities	(84,839)	(45,479)
Increase (decrease) in cash and cash equivalents	(6,066)	15,905
Cash and cash equivalents at beginning of period	141,706	95,800
Cash and cash equivalents at end of period	$ 135,640	$ 111,705