XML 81 R69.htm IDEA: XBRL DOCUMENT
v3.19.2

Acquisitions - Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives (Detail) - Electro Scientific Industries Inc [Member] - USD ($) $ in Thousands |  | 6 Months Ended
--- | --- | ---
Feb. 01, 2019 | Jun. 30, 2019
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 316,200 | $ 316,200
Completed Technology [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price |  | 274,000
Completed Technology [Member] | Lasers Products [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | 255,700 |
Completed Technology [Member] | Non Laser Products [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | 18,300 |
Trademarks and Trade Names [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | 14,400 |
Customer Relationships [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | 25,400 | $ 25,400
Backlog [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquired intangible assets, purchase price | $ 2,400 |

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_AcquiredFiniteLivedIntangibleAssetsLineItems
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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_ElectroScientificIndustriesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mksi_LaserProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mksi_NonLaserProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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