XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Fair Value of Financial Instruments - Auction Rate Securities (Details) - Auction rate securities - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 02, 2016 | Jan. 02, 2016
Weighted Average | Discounted cash flow |  |
Quantitative information for Level 3 Fair Value Measurements Assets |  |
Estimated yield (as a percent) | 1.09% |
Expected holding period | 10 years |
Estimated discount rate (as a percent) | 3.27% |
Assets and liabilities measured at fair value on recurring basis |  |
Quantitative information for Level 3 Fair Value Measurements Assets |  |
Fair value balance at the end of the period | $ 6,845 | $ 7,126

X
- Definition Represents the estimated interest rates, used as an input to measure fair value. + References No definition available. + Details
Name: | slab_FairValueInputsEstimatedInterestRates
Namespace Prefix: | slab_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the expected holding period, used as an input to measure fair value. + References No definition available. + Details
Name: | slab_FairValueInputsExpectedHoldingPeriods
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the liquidity discount, used as an input to measure fair value. + References No definition available. + Details
Name: | slab_FairValueInputsLiquidityDiscount
Namespace Prefix: | slab_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_AuctionRateSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationTechniqueAxis=slab_DiscountedCashFlowValuationTechniqueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |