XML 75 R65.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 29, 2016 | Mar. 17, 2015 | Sep. 30, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets | $ 395,504 |  |  |
Unfavorable lease commitments | 4,302 |  |  |
Precisive, LLC [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  | $ 5,110 |  | $ 5,110
Precisive, LLC [Member] | Completed Technology [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  |  |  | 820
Precisive, LLC [Member] | Customer Relationships [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  | $ 1,430 |  | 1,430
Precisive, LLC [Member] | Patents, Trademarks, Trade Names and Other [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  |  |  | $ 2,860
Newport [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  |  | $ 399,806 |
Unfavorable lease commitments |  |  | 4,302 |
Newport [Member] | Completed Technology [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  |  | 75,386 |
Newport [Member] | Customer Relationships [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets | 243,093 |  | 243,093 |
Newport [Member] | Patents, Trademarks, Trade Names and Other [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets |  |  | 74,428 |
Newport [Member] | In-process Research and Development [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquired intangible assets | $ 6,899 |  | $ 6,899 |

X
- Definition Unfavorable leasehold liability. + References No definition available. + Details
Name: | mksi_UnfavorableLeaseholdLiability
Namespace Prefix: | mksi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References No definition available. + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentedTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=mksi_PatentsTrademarksTradeNamesAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_InProcessResearchAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |