CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Cash flows from operating activities:
Net loss	$ (70,562)	$ (54,099)	$ (159,233)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	57,861	61,806	60,808
Impairment of goodwill and acquired intangible assets	32,431	7,866	21,655
Amortization of debt issuance costs and discount	1,982	1,350	2,835
Change in deferred income tax provision	(154)	90	21,367
Loss on sale or maturity of marketable securities	252	79	333
Gain on forward contracts	(77)	(184)	0
Stock-based compensation expense	12,543	16,213	18,396
(Gain) loss on disposal of fixed assets	(75)	597	0
Gain on sale of building	(4,624)	0	0
Loss (Gain) on sale of assets and business units	1,496	(2,646)	0
Impairment of cost-method investment	1,761	1,459	492
Changes in assets and liabilities:
Accounts receivable, net	44,613	(11,419)	4,578
Inventories	(902)	(3,272)	9,868
Prepaid expenses and other assets	889	(2,270)	(6,710)
Accounts payable and accrued expenses (includes restructuring)	(23,588)	8,338	6,301
Accrued payroll obligations	726	402	(10,202)
Income taxes payable	(556)	3,216	1,749
Deferred income and allowances on sales to sell-through distributors	(15,007)	14,391	2,920
Deferred licensing and services revenue	(495)	(183)	1,958
Net cash provided by (used in) operating activities	38,514	41,734	(22,885)
Cash flows from investing activities:
Proceeds from sales of and maturities of short-term marketable securities	12,689	14,897	142,956
Purchase of marketable securities	(7,420)	(7,490)	(15,982)
Cash paid for business acquisition, net of cash acquired	0	0	(431,068)
Proceeds from sale of building	7,895	0	0
Cash paid for costs of sale of building	(1,004)	0	0
Capital expenditures	(12,855)	(16,717)	(18,209)
Proceeds from sale of assets and business units, net of cash sold	967	1,972	0
Repayment received on short-term loan to cost-method investee	2,000	0	0
Short-term loan to cost-method investee	(2,000)	0	0
Cash paid for a cost-method investment	0	(1,000)	(5,000)
Cash paid for software licenses	(8,532)	(9,035)	(9,515)
Net cash used in investing activities	(8,260)	(17,373)	(336,818)
Cash flows from financing activities:
Restricted stock unit withholdings	(3,267)	(3,565)	(3,493)
Proceeds from issuance of common stock	6,085	7,607	5,679
Net proceeds from issuance of long-term debt	0	0	346,500
Cash paid for debt issuance costs	0	0	(8,283)
Repayment of debt	(35,429)	(5,154)	(2,625)
Purchase of treasury stock	0	0	(6,970)
Cash paid to redeem noncontrolling interest	0	0	(867)
Net cash (used in) provided by financing activities	(32,611)	(1,112)	329,941
Effect of exchange rate change on cash	2,620	(1,303)	(1,243)
Net increase (decrease) in cash and cash equivalents	263	21,946	(31,005)
Beginning cash and cash equivalents	106,552	84,606	115,611
Ending cash and cash equivalents	106,815	106,552	84,606
Supplemental cash flow information:
Change in unrealized loss related to marketable securities, net of tax, included in Accumulated other comprehensive loss	73	172	69
Income taxes paid, net of refunds	2,387	9,359	8,339
Interest paid	20,649	18,159	11,071
Accrued purchases of property and equipment	588	1,028	1,277
Note receivable resulting from sale of assets and business units	3,050	0	0
Transfer of residual temporary equity to additional paid-in capital on redemption of noncontrolling interest	$ 0	$ 0	$ 6,773