XML 82 R69.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stock-Based Compensation - Stock Grants and Modifications (Details) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 USD ($) shares | Dec. 30, 2017 shares | Dec. 31, 2016 USD ($) employee shares
Stock-Based Compensation |  |  |
SG&A expense related to modifications to equity awards | $ |  |  | $ 900
Number of employee terminated | employee |  |  | 3
2009 Stock Incentive Plan | Full value awards |  |  |
Stock-Based Compensation |  |  |
Number of equity awards granted | 600 | 700 | 1,300
2009 Stock Incentive Plan | Stock options |  |  |
Stock-Based Compensation |  |  |
Stock options granted (in shares) | 0 | 0 | 200
2009 Stock Incentive Plan | MSUs |  |  |
Stock-Based Compensation |  |  |
Number of equity awards granted | 41 | 54 | 65
Cash consideration based upon achievement of specified levels of market conditions | $ | $ 0 |  |
Award vesting period | 3 years |  |
2009 Stock Incentive Plan | PSUs |  |  |
Stock-Based Compensation |  |  |
Number of equity awards granted | 41 | 54 | 65
Cash consideration based upon achievement of specified levels of market conditions | $ | $ 0 |  |
Award vesting period | 3 years |  |

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 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 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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
- Details
Name: | us-gaap_PlanNameAxis=slab_StockIncentivePlan2009Member
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: | 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_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |