Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Cash flows from operating activities:
Net income	$ 15,994	$ 16,589
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,866	8,508
Purchase premium amortization/discount accretion on investments, net	64	20
Non-cash stock-based compensation	5,128	4,411
Income tax impact associated with stock option exercises	0	(24)
Deferred income taxes	468	489
Changes in assets and liabilities:
Accounts receivable	48,585	72,221
Inventories	(19,964)	(2,189)
Prepaid expenses and other assets	3,508	3,784
Accounts payable	(22,106)	(16,101)
Accrued employee compensation	(12,582)	(6,297)
Other accrued liabilities	(20,230)	(18,591)
Deferred revenue	(2,794)	(2,726)
Income taxes payable	5,324	1,930
Net cash provided by operating activities	9,261	62,024
Cash flows from investing activities:
Purchases of short-term investments	(33,917)	(30,148)
Proceeds from maturities of short-term investments	33,894	20,143
Purchase of property and equipment	(3,434)	(2,056)
Payments to cost method investments	1,400	0
Payments made in connection with business acquisition, net of cash acquired	737	0
Net cash used in investing activities	(5,594)	(12,061)
Cash flows from financing activities:
Repurchases of common stock	(11,631)	(10,006)
Restricted stock unit tax withholdings	(1,936)	(350)
Proceeds from exercise of stock options	2,438	3,661
Proceeds from issuance of common stock under employee stock purchase plan	2,662	1,645
Net cash used in financing activities	(8,467)	(5,050)
Net increase (decrease) in cash and cash equivalents	(4,800)	44,913
Cash and cash equivalents, at beginning of period	240,468	181,945
Cash and cash equivalents, at end of period	$ 235,668	$ 226,858