Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Statement of Cash Flows [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (159,485)	$ 48,580	$ 22,321
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	60,808	22,248	20,807
Impairment of goodwill and intangible assets	21,655	0	0
Amortization of debt issuance costs and discount	2,835	0	0
Change in deferred income tax provision	21,367	(7,222)	2,358
Loss (gain) on sale or maturity of marketable securities	333	(1,698)	0
Stock-based compensation expense	18,396	12,802	9,522
Equity in net loss of an unconsolidated affiliate	492	0	0
Changes in assets and liabilities:
Accounts receivable, net	4,578	(12,287)	(3,138)
Inventories	9,868	(18,703)	(2,028)
Prepaid expenses and other assets	(6,710)	(3,200)	(1,339)
Accounts payable and accrued expenses (includes restructuring)	6,553	(7,819)	3,549
Accrued payroll obligations	(10,202)	(30)	7,510
Income taxes payable	1,749	0	0
Deferred income and allowances on sales to sell-through distributors	2,920	7,451	(3,058)
Deferred licensing and services revenue	1,958	0	0
Net cash (used in) provided by operating activities	(22,885)	40,122	56,504
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	142,956	101,861	67,318
Purchase of marketable securities, net	(15,982)	(139,792)	(103,861)
Proceeds from sale of auction rate securities	0	5,488	0
Cash paid for business acquisition, net of cash acquired	(431,068)	0	0
Proceeds from sale of land and building	0	14,625	0
Capital expenditures, net	(18,209)	(10,267)	(12,500)
Cash paid for a non-marketable equity-method investment	(5,000)	0	0
Cash paid for software licenses	(9,515)	(6,059)	(7,353)
Net cash used in investing activities	(336,818)	(34,144)	(56,396)
Cash flows from financing activities:
Net share settlement upon issuance of restricted stock units	(3,493)	(3,427)	(744)
Purchase of treasury stock	(6,970)	(13,089)	(6,161)
Net proceeds from issuance of common stock	5,679	12,168	3,076
Net proceeds from issuance of long-term debt	346,500	0	0
Cash paid for debt issuance costs	(8,283)	0	0
Repayment of debt	(2,625)	0	0
Cash paid to redeem noncontrolling interest	(867)	0	0
Net cash provided by (used in) financing activities	329,941	(4,348)	(3,829)
Effect of exchange rate change on cash	(1,243)	(329)	(505)
Net (decrease) increase in cash and cash equivalents	(31,005)	1,301	(4,226)
Beginning cash and cash equivalents	115,611	114,310	118,536
Ending cash and cash equivalents	84,606	115,611	114,310
Supplemental disclosures of non-cash investing and financing activities:
Change in unrealized (loss) gain related to marketable securities, net of tax, included in Accumulated other comprehensive loss	(69)	(373)	284
Income taxes paid, net of refunds	8,339	1,599	1,370
Interest paid	11,071	0	0
Accrued purchases of plant and equipment	799	(34)	122
Transfer of residual temporary equity to additional paid-in capital on redemption of noncontrolling interest	$ 6,773	$ 0	$ 0