Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015
Cash flows from operating activities:
Net income	$ 32,623	$ 11,678
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,887	18,692
Purchase premium amortization/discount accretion on investments, net	56	(58)
Non-cash stock-based compensation	9,430	8,406
Income tax impact associated with stock option exercises	768	(799)
Excess tax benefit from stock-based compensation	(1,426)	(240)
Deferred income taxes	3,857	2,220
Changes in assets and liabilities:
Accounts receivable	60,092	29,196
Inventories	5,277	34,215
Prepaid expenses and other assets	3,066	6,428
Accounts payable	(9,866)	(34,508)
Accrued employee compensation	3,349	(2,999)
Other accrued liabilities	(34,091)	(20,912)
Deferred revenue	136	(3,209)
Income taxes payable	(1,482)	(9,603)
Net Cash Provided by Operating Activities	88,676	38,507
Cash flows from investing activities:
Purchases of short-term investments	(80,254)	(25,105)
Proceeds from sales and maturities of short-term investments	50,147	65,142
Purchase of property and equipment	(5,060)	(8,200)
Net Cash Provided by (Used in) Investing Activities	(35,167)	31,837
Cash flows from financing activities:
Purchase and retirement of common stock	(27,167)	(81,036)
Proceeds from exercise of stock options	14,653	4,471
Proceeds from issuance of common stock under employee stock purchase plan	1,645	1,502
Excess tax benefit from stock-based compensation	1,426	240
Net Cash Used in Financing Activities	(9,443)	(74,823)
Net increase (decrease) in cash and cash equivalents	44,066	(4,479)
Cash and cash equivalents, at beginning of period	181,945	141,234
Cash and cash equivalents, at end of period	$ 226,011	$ 136,755