XML 75 R58.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) item employee $ / shares shares | Jan. 02, 2016 USD ($) employee shares | Jan. 03, 2015 shares
Stock-based compensation costs |  |  |
SG&A expense related to modifications to equity awards | $ | $ 900 | $ 2,300 |
Number of employee terminated | employee | 3 | 2 |
Stock options |  |  |
Stock-based compensation costs |  |  |
Stock options granted (in shares) | 173,000 |  |
Fair value assumptions |  |  |
Expected volatility (as a percent) | 32.00% |  |
Risk-free interest rate % | 1.30% |  |
Expected term | 5 years 4 months 24 days |  |
Market Stock Units |  |  |
Fair value assumptions |  |  |
Expected volatility (as a percent) | 30.00% | 31.00% | 33.00%
Risk-free interest rate % | 0.90% | 1.00% | 0.70%
Expected term | 2 years 10 months 24 days | 2 years 10 months 24 days | 2 years 9 months 18 days
2009 Stock Incentive Plan |  |  |
Stock-based compensation costs |  |  |
Number of share pools under the 2009 Plan | item | 2 |  |
2009 Stock Incentive Plan | Low end of range |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 3 years |  |
2009 Stock Incentive Plan | High end of range |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 4 years |  |
2009 Stock Incentive Plan | Stock options |  |  |
Stock-based compensation costs |  |  |
Minimum exercise price as percentage of fair market value of shares on the date of grant | 100.00% |  |
Number of shares granted | 200,000 | 0 | 0
2009 Stock Incentive Plan | Full value awards |  |  |
Stock-based compensation costs |  |  |
Number of shares granted | 1,300,000 | 900,000 | 800,000
2009 Stock Incentive Plan | Full value awards | Prior Pool |  |  |
Stock-based compensation costs |  |  |
Number of shares deducted for each share granted under 2009 Stock Incentive Plan | 1.55 |  |
2009 Stock Incentive Plan | Market Stock Units |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 3 years |  |
Number of shares granted | 65,000 | 89,000 | 76,000
Fair value assumptions |  |  |
Cash consideration based upon achievement of specified levels of market conditions | $ | $ 0 |  |
2009 Stock Incentive Plan | Stock options and stock appreciation rights | Prior Pool |  |  |
Stock-based compensation costs |  |  |
Number of shares deducted for each share granted under 2009 Stock Incentive Plan | 1 |  |
2009 Stock Incentive Plan | Stock options, stock appreciation rights and full value awards | New Pool |  |  |
Stock-based compensation costs |  |  |
Number of shares deducted for each share granted under 2009 Stock Incentive Plan | 1 |  |
2009 Stock Incentive Plan | Performance-based stock awards |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 3 years |  |
Number of shares granted | 65,000 |  |
Fair value assumptions |  |  |
Cash consideration based upon achievement of specified levels of market conditions | $ | $ 0 |  |
2000 Stock Incentive Plan | Low end of range |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 3 years |  |
2000 Stock Incentive Plan | High end of range |  |  |
Stock-based compensation costs |  |  |
Award vesting period | 8 years |  |
2000 Stock Incentive Plan | Stock options | High end of range |  |  |
Stock-based compensation costs |  |  |
Term of award | 10 years |  |
2009 Employee Stock Purchase Plan |  |  |
Stock-based compensation costs |  |  |
Minimum exercise price as percentage of fair market value of shares on the date of grant | 85.00% |  |
Maximum term of offering | 24 months |  |
Shares issued | 224,000 | 210,000 | 204,000
Weighted-average fair value for purchase rights granted (in dollars per share) | $ / shares | $ 13.43 |  |
Fair value assumptions |  |  |
Expected volatility (as a percent) | 30.00% | 31.00% | 28.00%
Risk-free interest rate % | 0.60% | 0.20% | 0.20%
Expected term | 15 months | 8 months | 15 months

X
- Definition Represents the amount of equity award expenses recorded in selling, general and administrative expenses due to modifications of equity awards. + References No definition available. + Details
Name: | slab_EquityAwardExpensesDueToModificationsRecordedInSellingGeneralAndAdministrativeExpense
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the number of employee terminated during the period. + References No definition available. + Details
Name: | slab_NumberOfEmployeeTerminated
Namespace Prefix: | slab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of share pools available for stock-based compensation plans. + References No definition available. + Details
Name: | slab_NumberOfSharePools
Namespace Prefix: | slab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the maximum term of an offering period for awards under the equity-based compensation plan. + References No definition available. + Details
Name: | slab_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTermOfOffering
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum exercise price of awards granted under the equity-based compensation plan, as percentage of fair market value of a share of entity's common stock on the date of grant. + References No definition available. + Details
Name: | slab_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumExercisePriceAsPercentageOfGrantDateFairValue
Namespace Prefix: | slab_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of shares to be deducted from shares available for issuance for each share granted under the equity-based compensation plan. + References No definition available. + Details
Name: | slab_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesToBeDeductedFromSharesAvailableForIssuanceForEachShareGranted
Namespace Prefix: | slab_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of the share based award in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
Name: | slab_ShareBasedCompensationArrangementByShareBasedPaymentAwardTerm
Namespace Prefix: | slab_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the cash consideration based upon achievement of specified levels of market conditions. + References No definition available. + Details
Name: | slab_ShareBasedCompensationArrangementCashConsiderationBasedUponAchievementOfSpecifiedLevelsOfMarketConditions
Namespace Prefix: | slab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=slab_MarketStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=slab_StockIncentivePlan2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_AwardTypeAxis=slab_FullValueAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | slab_SharePoolAxis=slab_PriorPoolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=slab_EmployeeStockOptionsAndStockAppreciationRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=slab_EmployeeStockOptionsStockAppreciationRightsAndFullValueAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | slab_SharePoolAxis=slab_NewPoolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=slab_StockIncentivePlan2000Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=slab_EmployeeStockPurchasePlan2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |