Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015
Cash flows from operating activities:
Net income	$ 53,742	$ 26,777
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,601	27,336
Purchase premium amortization/discount accretion on investments, net	106	(73)
Non-cash stock-based compensation	14,300	12,517
Income tax impact associated with stock option exercises	1,627	(1,049)
Excess tax benefit from stock-based compensation	(2,290)	(252)
Deferred income taxes	1,327	(149)
Changes in assets and liabilities:
Accounts receivable	56,731	1,516
Inventories	(4,503)	52,870
Prepaid expenses and other assets	9,772	7,332
Accounts payable	5,428	(7,696)
Accrued employee compensation	(3,842)	(174)
Other accrued liabilities	(24,444)	(4,405)
Deferred revenue	(2,610)	(899)
Income taxes payable	1,082	2,002
Net cash provided by operating activities	131,027	115,653
Cash flows from investing activities:
Purchases of short-term investments	(117,994)	(50,301)
Proceeds from sales and maturities of short-term investments	85,286	105,142
Purchase of property and equipment	(6,984)	(11,142)
Net cash provided by (used in) investing activities	(39,692)	43,699
Cash flows from financing activities:
Purchase and retirement of common stock	(27,616)	(107,531)
Proceeds from exercise of stock options	21,874	6,137
Proceeds from issuance of common stock under employee stock purchase plan	3,892	2,985
Excess tax benefit from stock-based compensation	2,290	252
Net cash provided by (used in) financing activities	440	(98,157)
Net increase in cash and cash equivalents	91,775	61,195
Cash and cash equivalents, at beginning of period	181,945	141,234
Cash and cash equivalents, at end of period	$ 273,720	$ 202,429