Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Current:
Domestic	$ 951	$ 7,083	$ 4,796
International	3,015	882	4,093
Total Current	3,966	7,965	8,889
Deferred:
Domestic	(5,825)	2,352	5,591
International	2,536	702	(2,272)
Total Deferred	(3,289)	3,054	3,319
Income Tax Expense (Benefit), Total	$ 677	$ 11,019	$ 12,208
Effective income tax rate reconciliation
Federal statutory rate (as a percent)	35.00%	35.00%	35.00%
Foreign tax rate benefit (as a percent)	(30.70%)	(3.50%)	(8.20%)
Research and development tax credits (as a percent)	(5.60%)	(8.60%)	(12.80%)
Release of prior year unrecognized tax benefits (as a percent)	(1.90%)	(2.60%)
Excess officer compensation (as a percent)	3.20%	2.30%	1.90%
Change in cost-sharing treatment of stock-based compensation	(7.10%)
Change in prior period valuation allowance	8.80%	(1.40%)	3.10%
Other (as a percent)	0.50%	1.30%	0.70%
Effective income tax rate (as a percent)	2.20%	22.50%	19.70%
Undistributed earnings of foreign subsidiaries	$ 312,400
Income before income taxes
Domestic	2,249	$ 38,174	$ 41,849
Foreign	28,014	10,866	$ 20,178
Valuation allowance related to certain state loss and research and development tax credit carryforwards	500
Valuation allowance related to certain federal loss and research and development tax credit carryforwards	3,200
Valuation allowance related to change in tax accounting treatment of stock-based compensation tax credit carryforwards	600
Valuation allowance related to previously acquired federal research and development credit carryforwards	2,000
Valuation allowance related to prior year state research and development tax credit carryforwards	400
Valuation allowance related to prior year state net operating loss carryforwards	200
Release of valuation allowance due to the expiration of certain state net operating loss carryforwards	100
Deferred tax assets:
Net operating loss carryforwards	25,869	31,518
Research and development tax credit carryforwards	13,335	9,740
Stock-based compensation	8,757	6,353
Capitalized research and development	8,741	7,371
Deferred income on shipments to distributors	7,413	8,117
Expected future cost-sharing adjustment	25,896
Accrued liabilities and other	8,619	6,481
Deferred tax assets	98,630	69,580
Less: Valuation allowance	(10,264)	(3,455)
Deferred tax assets, net	88,366	66,125
Deferred tax liabilities:
Acquired intangible assets	33,020	33,630
Depreciation and amortization	2,349	3,388
Unremitted foreign earnings for expected future cost-sharing adjustment	27,495
Prepaid expenses and other	1,991	1,517
Deferred tax liabilities	64,855	38,535
Net deferred tax assets	23,511	$ 27,590
Altera decision
Deferred:
Income Tax Expense (Benefit), Total	(29,600)
Deferred tax assets:
Stock-based compensation	3,700
Expected future cost-sharing adjustment	$ 25,900