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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Results of Operations, Income before Income Taxes [Abstract]      
Domestic $ 6,292us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 6,293us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 51,859us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign 36,649us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 20,193us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign (60,720)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Income (loss) before taxes 42,941us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 26,486us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (8,861)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Current:      
Federal 329us-gaap_CurrentFederalTaxExpenseBenefit 251us-gaap_CurrentFederalTaxExpenseBenefit (344)us-gaap_CurrentFederalTaxExpenseBenefit
State 5us-gaap_CurrentStateAndLocalTaxExpenseBenefit (527)us-gaap_CurrentStateAndLocalTaxExpenseBenefit 36us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign 1,944us-gaap_CurrentForeignTaxExpenseBenefit 1,616us-gaap_CurrentForeignTaxExpenseBenefit 1,498us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax (provision) benefit 2,278us-gaap_CurrentIncomeTaxExpenseBenefit 1,340us-gaap_CurrentIncomeTaxExpenseBenefit 1,190us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:      
Federal (7,416)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 2,549us-gaap_DeferredFederalIncomeTaxExpenseBenefit 18,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State (513)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 342us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 1,487us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign 12us-gaap_DeferredForeignIncomeTaxExpenseBenefit (66)us-gaap_DeferredForeignIncomeTaxExpenseBenefit 68us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Deferred income tax (provision) benefit (7,917)us-gaap_DeferredIncomeTaxExpenseBenefit 2,825us-gaap_DeferredIncomeTaxExpenseBenefit 19,555us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax (benefit) expense (5,639)us-gaap_IncomeTaxExpenseBenefit 4,165us-gaap_IncomeTaxExpenseBenefit 20,745us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]      
Statutory federal rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State taxes, net 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 2.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Research and development credits (9.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch (11.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Stock compensation 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost 3.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost (3.00%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Foreign rate differential (25.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (20.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (252.00%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Foreign dividends 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends 3.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
Capital loss expiration 7.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther 2.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther
Valuation allowance (23.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 6.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (19.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change in uncertain tax benefit accrual 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies 3.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies
Tax rate change (4.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Other 2.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 2.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate (13.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 16.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations (234.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations $ 67us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations $ 367us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations $ 392us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations