Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Cash flows from operating activities:
Net (loss) income	$ (54,099)	$ (159,233)	$ 48,580
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	61,806	60,808	22,248
Impairment of goodwill and intangible assets	7,866	21,655	0
Amortization of debt issuance costs and discount	1,350	2,835	0
Change in deferred income tax provision	90	21,367	(7,222)
Loss (gain) on sale or maturity of marketable securities	79	333	(1,698)
Gain on forward contracts	(184)	0	0
Stock-based compensation expense	16,213	18,396	12,802
Loss on disposal of fixed assets	597	0	0
Gain on sale of business unit	(2,646)	0	0
Equity in net loss of an unconsolidated affiliate, net of tax	1,459	492	0
Changes in assets and liabilities:
Accounts receivable, net	(11,419)	4,578	(12,287)
Inventories	(3,272)	9,868	(18,703)
Prepaid expenses and other assets	(2,270)	(6,710)	(3,200)
Accounts payable and accrued expenses (includes restructuring)	8,338	6,301	(7,819)
Accrued payroll obligations	402	(10,202)	(30)
Income taxes payable	3,216	1,749	0
Deferred income and allowances on sales to sell-through distributors	14,391	2,920	7,451
Deferred licensing and services revenue	(183)	1,958	0
Net cash (used in) provided by operating activities	41,734	(22,885)	40,122
Cash flows from investing activities:
Proceeds from sales of and maturities of marketable securities	14,897	142,956	101,861
Purchase of marketable securities, net	(7,490)	(15,982)	(139,792)
Proceeds from sale of auction rate securities	0	0	5,488
Cash paid for business acquisition, net of cash acquired	0	(431,068)	0
Proceeds from sale of land and building	0	0	14,625
Capital expenditures	(16,717)	(18,209)	(10,267)
Proceeds from sale of business unit, net of cash sold	1,972	0	0
Cash paid for a non-marketable equity-method investment	(1,000)	(5,000)	0
Cash paid for software licenses	(9,035)	(9,515)	(6,059)
Net cash used in investing activities	(17,373)	(336,818)	(34,144)
Cash flows from financing activities:
Proceeds from issuance of restricted stock units, net of withholding taxes	(3,565)	(3,493)	(3,427)
Purchase of treasury stock	0	(6,970)	(13,089)
Net proceeds from issuance of common stock	7,607	5,679	12,168
Net proceeds from issuance of long-term debt	0	346,500	0
Cash paid for debt issuance costs	0	(8,283)	0
Repayment of debt	(5,154)	(2,625)	0
Cash paid to redeem noncontrolling interest	0	(867)	0
Net cash provided by (used in) financing activities	(1,112)	329,941	(4,348)
Effect of exchange rate change on cash	(1,303)	(1,243)	(329)
Net (decrease) increase in cash and cash equivalents	21,946	(31,005)	1,301
Beginning cash and cash equivalents	84,606	115,611	114,310
Ending cash and cash equivalents	106,552	84,606	115,611
Supplemental cash flow information:
Change in unrealized loss related to marketable securities, net of tax, included in Accumulated other comprehensive loss	172	69	373
Income taxes paid, net of refunds	9,359	8,339	1,599
Interest paid	18,159	11,071	0
Accrued purchases of property and equipment	1,028	1,277	478
Transfer of residual temporary equity to additional paid-in capital on redemption of noncontrolling interest	$ 0	$ 6,773	$ 0