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Derivative Financial Instruments (Details 2) (USD $) | 12 Months Ended |
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Jan. 03, 2015 | Dec. 29, 2012 | Dec. 28, 2013
Derivative Financial Instruments |  |  |
Notional value of interest rate swap agreement hedging headquarters lease |  | $ 50,100,000 slab_NotionalAmountOfInterestRateCashFlowHedgeDerivativesMaturedDuringPeriod |
Loss Reclassified from Accumulated OCI into Income (Effective Portion), included in rent and interest expense during period |  | 900,000 us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet |
Gains or losses from the hedging instrument which was excluded from the assessment of effectiveness | 0 us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet |  |
Other assets, net |  |  |
Derivative financial instrument |  |  |
Fair value of interest rate swap | $ 331,000 us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue / us-gaap_BalanceSheetLocationAxis = slab_OtherAssetsNetMember |  | $ 513,000 us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue / us-gaap_BalanceSheetLocationAxis = slab_OtherAssetsNetMember

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- Definition Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges that matured during the period. Notional amount refers to the monetary amount specified in the interest rate derivative contract. + References No definition available. + Details
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- Details
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- Details
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- Definition The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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