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

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition The net amount of all increases and decreases in unrecognized tax benefits for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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