Basis of Presentation and Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended
	Jul. 04, 2015 USD ($) Contract	Jun. 28, 2014	Jul. 04, 2015 USD ($) Contract	Jun. 28, 2014	Jan. 03, 2015 USD ($)
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative, Number of Instruments Held | Contract	1		1
Risks and Uncertainties [Abstract]
Allowance for doubtful accounts	$ 1,100,000		$ 1,100,000		$ 900,000
Deferred Revenue and Credits [Abstract]
Inventory valued at published list price and held by sell-through distributors with right of return	51,153,000		51,153,000		50,854,000
Allowance for distributor advances	(26,770,000)		(26,770,000)		(29,490,000)
Deferred cost of sales related to inventory held by sell-through distributors	(4,799,000)		(4,799,000)		(6,418,000)
Total Deferred income and allowances on sales to sell-through distributors	$ 19,584,000		$ 19,584,000		14,946,000
Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	33.00%	47.00%	34.00%	49.00%
Sales Revenue | Sell-Through Distributors
Risks and Uncertainties [Abstract]
Concentration Risk	43.00%	42.00%	45.00%	40.00%
Derivative One
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative, Number of Instruments Held | Contract	3		3
Not designated as effective hedges for accounting purposes | Foreign exchange contracts
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Open foreign exchange contracts - notional amounts	$ 1,900,000		$ 1,900,000		$ 4,200,000
Minimum
Basis of Presentation and Significant Accounting Policies [Line Items]
Fiscal year duration (52 weeks or 53 weeks)			364 days
Maximum
Basis of Presentation and Significant Accounting Policies [Line Items]
Fiscal year duration (52 weeks or 53 weeks)			371 days
Term of maturities of investments considered cash and cash equivalents			3 months
Customer A | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	12.00%	20.00%	11.00%	21.00%
Customer B | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk		14.00%		14.00%
Other Nonoperating Income (Expense) [Member]
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Gain on foreign exchange contracts adjusted to fair value through earnings - less than			$ 100,000