XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Acquisitions - Summary of Pro Forma Adjustments Used to Arrive Pro Forma Net Income (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Conexant Systems, LLC [Member] |  |
Business Acquisition [Line Items] |  |
Buyer transaction costs | $ 0.9 |
Interest expense |  | $ (4.6)
Intangible amortization | (2.3) | (7.3)
Depreciation |  | (0.2)
Income tax adjustment | 0.5 | 4.2
Total | (0.9) | (7.9)
Marvell Technology Group Ltd [Member] |  |
Business Acquisition [Line Items] |  |
Buyer transaction costs | 0.9 |
Interest expense |  | (5.0)
Intangible amortization | (1.2) | (3.1)
Income tax adjustment | 0.1 | 2.8
Total | $ (0.2) | $ (5.3)

X
- Definition Business combination pro forma information adjustment. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationAdjustment
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business combination pro forma information amortization of intangible assets adjustment. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationAmortizationOfIntangibleAssetsAdjustment
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business combination pro forma information cost of acquired buyer transaction costs. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationCostOfAcquiredBuyerTransactionCosts
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business combination pro forma information depreciation adjustments. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationDepreciationAdjustments
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business combination pro forma information income tax adjustment. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationIncomeTaxAdjustment
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Business combination pro forma information interest expense adjustments. + References No definition available. + Details
Name: | syna_BusinessCombinationProFormaInformationInterestExpenseAdjustments
Namespace Prefix: | syna_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=syna_ConexantSystemsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=syna_MarvellTechnologyGroupLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |