Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Operating Activities
Net income	$ 5,808	$ 6,378
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	3,310	2,987
Amortization of other intangible assets and other assets	7,980	6,521
Stock-based compensation expense	10,344	10,519
Income tax benefit (shortfall) from stock-based awards	(1,025)	1,773
Excess income tax benefit from stock-based awards	(6)	(1,785)
Deferred income taxes	(38)	6,844
Changes in operating assets and liabilities:
Accounts receivable	(990)	6,564
Inventories	4,580	(6,424)
Prepaid expenses and other assets	9,159	8,584
Accounts payable	1,559	447
Accrued expenses	6,260	(5,046)
Deferred income on shipments to distributors	5,558	(1,049)
Income taxes	494	(8,409)
Other non-current liabilities	(10,584)	(3,816)
Net cash provided by operating activities	42,409	24,088
Investing Activities
Purchases of available-for-sale investments	(44,547)	(13,037)
Proceeds from sales and maturities of available-for-sale investments	46,654	57,739
Purchases of property and equipment	(2,303)	(1,991)
Purchases of other assets	(1,107)	(935)
Acquisition of business, net of cash acquired		(76,899)
Net cash used in investing activities	(1,303)	(35,123)
Financing Activities
Payment of taxes withheld for vested stock awards, net of proceeds from the issuance of common stock	(7,523)	(2,561)
Excess income tax benefit from stock-based awards	6	1,785
Repurchases of common stock	(18,484)	(10,138)
Payment of acquisition-related contingent consideration		(4,464)
Payments on debt	(2,500)	(2,583)
Net cash used in financing activities	(28,501)	(17,961)
Increase (decrease) in cash and cash equivalents	12,605	(28,996)
Cash and cash equivalents at beginning of period	114,085	141,706
Cash and cash equivalents at end of period	$ 126,690	$ 112,710