Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014
Cash flows from operating activities:
Net (loss) income	$ (89,018)	$ 23,755
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	25,363	11,633
Amortization of debt issuance costs and discount	1,105	0
Change in deferred income tax provision	22,385	2,824
Loss (gain) on sale of marketable securities	293	(1,698)
Stock-based compensation expense	8,363	6,410
Changes in assets and liabilities:
Accounts receivable, net	16,176	(16,204)
Inventories	4,969	(13,048)
Prepaid expenses and other current assets	47	(1,632)
Accounts payable and accrued expenses (includes restructuring)	(8,131)	(962)
Accrued payroll obligations	(2,637)	(3,159)
Deferred income and allowances on sales to sell-through distributors	4,638	16,136
Deferred income and allowances on sales to sell-through distributors	1,040	0
Net cash (used in) provided by operating activities	(15,407)	24,055
Cash flows from investing activities:
Proceeds from sales or maturities of short-term marketable securities	112,381	45,836
Proceeds from sales of auction rate securities	0	5,488
Purchases of marketable securities	(4,005)	(53,366)
Cash paid for business acquisition, net of cash acquired	(426,661)	0
Capital expenditures, net	(7,032)	(4,875)
Cash paid for a non-marketable cost-method investment	(1,500)	0
Cash paid for software licenses	(3,251)	(1,359)
Net cash used in investing activities	(330,068)	(8,276)
Cash flows from financing activities:
Net share settlement upon issuance of restricted stock units	(4,438)	(2,334)
Purchases of treasury stock	(6,970)	0
Net proceeds from issuance of common stock	5,546	9,419
Net proceeds from issuance of long-term debt	346,500	0
Cash paid for debt issuance costs	(8,282)	0
Repayment of debt	(875)	0
Net cash provided by financing activities	331,481	7,085
Effect of exchange rate change on cash	(119)	802
Net (decrease) increase in cash and cash equivalents	(14,113)	23,666
Beginning cash and cash equivalents	115,611	114,310
Ending cash and cash equivalents	101,498	137,976
Supplemental cash flow information:
Change in unrealized gain (loss) related to marketable securities, net of tax, included in Accumulated other comprehensive (loss) income	(3)	29
Income taxes paid, net of refunds	3,112	798
Accrued purchases of plant and equipment	$ (227)	$ 58