CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 02, 2015	Sep. 26, 2014
Cash flows from operating activities:
Net income (loss)	$ (8,462)	$ (41,394)
Adjustments to reconcile net loss to net cash provided by operating activities:
Amortization of intangibles	4,971	18,378
Depreciation	10,143	12,641
Stock-based compensation	11,845	12,720
Loss on impairment of long-term investment	2,505	0
Deferred income taxes, net	0	31,782
Provision for excess and obsolete inventories	1,234	2,013
Allowance for doubtful accounts, returns and discounts	576	(116)
Excess tax benefits from stock-based compensation	0	(194)
Other non-cash adjustments, net	354	1,108
Changes in operating assets and liabilities:
Accounts receivable	9,440	(472)
Inventories	(7,936)	2,401
Prepaid expenses and other assets	(13,817)	(5,321)
Accounts payable	1,772	(786)
Deferred revenue	5,237	7,770
Income taxes payable	(1,372)	(8,292)
Accrued and other liabilities	(7,926)	(4,717)
Net cash provided by operating activities	8,564	27,521
Cash flows from investing activities:
Purchases of investments	(20,714)	(26,599)
Proceeds from maturities of investments	26,534	43,236
Proceeds from sales of investments	0	7,408
Purchases of property and equipment	(10,393)	(8,859)
Purchases of long-term investments	(85)	(5,867)
Restricted cash	(1,091)
Net cash (used in) provided by investing activities	(5,749)	9,319
Cash flows from financing activities:
Payments for repurchase of common stock	(20,007)	(86,407)
Proceeds from common stock issued to employees	9,255	4,357
Payment of tax withholding obligations related to net share settlements of restricted stock units	(3,288)	(3,116)
Excess tax benefits from stock-based compensation	0	194
Net cash used in financing activities	(14,040)	(84,972)
Effect of exchange rate changes on cash and cash equivalents	(236)	(169)
Net decrease in cash and cash equivalents	(11,461)	(48,301)
Cash and cash equivalents at beginning of period	73,032	90,329
Cash and cash equivalents at end of period	$ 61,571	$ 42,028