Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016
Cash flows from operating activities:
Net income	$ 30,576	$ 32,623
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,224	16,887
Purchase premium amortization/discount accretion on investments, net	100	56
Non-cash stock-based compensation	10,829	9,430
Income tax impact associated with stock option exercises	0	768
Deferred income taxes	1,788	3,857
Changes in assets and liabilities:
Accounts receivable	9,252	60,092
Inventories	(15,911)	5,277
Prepaid expenses and other assets	5,519	3,066
Accounts payable	(39,283)	(9,866)
Accrued employee compensation	(9,079)	3,349
Other accrued liabilities	(1,322)	(34,091)
Deferred revenue	1,232	136
Income taxes payable	(4,544)	(1,482)
Net cash provided by operating activities	3,381	90,102
Cash flows from investing activities:
Purchases of short-term investments	(56,876)	(80,254)
Proceeds from maturities of short-term investments	67,648	50,147
Purchase of property and equipment	(6,162)	(5,060)
Payments to cost method investments	(1,400)	0
Payments made in connection with business acquisition, net of cash acquired	(737)	0
Net cash provided by (used in) investing activities	2,473	(35,167)
Cash flows from financing activities:
Repurchases of common stock	(56,631)	(23,252)
Restricted stock unit tax withholdings	(5,649)	(3,915)
Proceeds from exercise of stock options	3,972	14,653
Proceeds from issuance of common stock under employee stock purchase plan	2,662	1,645
Net cash used in financing activities	(55,646)	(10,869)
Net increase (decrease) in cash and cash equivalents	(49,792)	44,066
Cash and cash equivalents, at beginning of period	240,468	181,945
Cash and cash equivalents, at end of period	$ 190,676	$ 226,011