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Income Taxes (Details 3) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Changes in unrecognized tax benefits
Unrecognized tax benefits, balance at the beginning of the period	$ 4,998,000us-gaap_UnrecognizedTaxBenefits	$ 4,364,000us-gaap_UnrecognizedTaxBenefits	$ 10,943,000us-gaap_UnrecognizedTaxBenefits
Additions based on tax positions related to current year	465,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	316,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1,818,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Additions based on tax positions related to prior years	58,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	318,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Reductions for tax positions related to prior years	(1,592,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions		(8,397,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Unrecognized tax benefits, balance at the end of the period	3,929,000us-gaap_UnrecognizedTaxBenefits	4,998,000us-gaap_UnrecognizedTaxBenefits	4,364,000us-gaap_UnrecognizedTaxBenefits
Gross unrecognized tax benefits which would affect the effective tax rate if recognized	4,000,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4,800,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4,100,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Gross increases in unrecognized tax benefits		600,000us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
Reasonably possible change in unrecognized tax position end in next twelve months
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	600,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
High end of range
Income Taxes
Interest in the provision for income taxes recognized	100,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / us-gaap_RangeAxis = us-gaap_MaximumMember	100,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / us-gaap_RangeAxis = us-gaap_MaximumMember
Accrual for the payment of interest related to unrecognized tax positions	$ 100,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued / us-gaap_RangeAxis = us-gaap_MaximumMember	$ 100,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued / us-gaap_RangeAxis = us-gaap_MaximumMember	$ 0us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued / us-gaap_RangeAxis = us-gaap_MaximumMember

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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