XML 49 R54.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019 | Jan. 01, 2018
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Minimum period of company's research and development projects | 3 months |  |  |  |
Maximum period of company's research and development projects | 30 months |  |  |  |
Vesting period | 3 years |  |  |  |
Amortization period of leasehold improvements | shorter of the lease term or the estimated useful life of the leased asset. |  |  |  |
Minimum percentage of recognition of tax benefits from uncertain tax positions | 50.00% |  |  |  |
Retained earnings opening balance sheet adjustment for Topic 606 adoption | $ 1,181,216 | $ 1,084,797 |  |  |
Right-of-Use Asset,Operating Lease | 64,497 |  |  |  |
Short-term lease liability | 20,632 |  |  |  |
Non-current lease liability | 44,759 |  |  |  |
Accounting Standards Codification Topic 606 adjustment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Retained earnings opening balance sheet adjustment for Topic 606 adoption |  |  |  |  | $ 1,738
Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Right-of-Use Asset,Operating Lease |  |  |  | $ 71,042 |
Short-term lease liability |  |  |  | 20,192 |
Non-current lease liability |  |  |  | $ 54,147 |
Other Expense [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Net foreign exchange losses from re-measurement | $ 31 | $ 2,497 | $ 6,132 |  |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration risk, percentage | 10.00% |  |  |  |
Customer Concentration Risk [Member] | Semiconductor Products [Member] | Sales Revenue, Net [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration risk, percentage | 49.00% | 55.00% | 57.00% |  |
Minimum [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Intangible assets amortized period | 1 year |  |  |  |
Minimum [Member] | Accounting Standards Codification Topic 606 adjustment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Company's normal payment terms | 30 days |  |  |  |
Warranty period | 12 months |  |  |  |
Term of separately priced contracts | 12 months |  |  |  |
Minimum [Member] | Credit Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration risk, percentage | 10.00% | 10.00% |  |  |
Minimum [Member] | Building [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 10 years |  |  |  |
Minimum [Member] | Machinery and Equipment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |
Minimum [Member] | Furniture and Fixtures [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |
Minimum [Member] | Office Equipment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 3 years |  |  |  |
Maximum [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Intangible assets amortized period | 18 years |  |  |  |
Maximum [Member] | Accounting Standards Codification Topic 606 adjustment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Company's normal payment terms | 60 days |  |  |  |
Warranty period | 24 months |  |  |  |
Term of separately priced contracts | 60 months |  |  |  |
Maximum [Member] | Building [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 50 years |  |  |  |
Maximum [Member] | Machinery and Equipment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 18 years |  |  |  |
Maximum [Member] | Furniture and Fixtures [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 18 years |  |  |  |
Maximum [Member] | Office Equipment [Member] |  |  |  |  |
Schedule Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful lives | 18 years |  |  |  |

X
- Definition Amortization period of leasehold improvements. + References No definition available. + Details
Name: | mksi_AmortizationPeriodOfLeaseholdImprovements
Namespace Prefix: | mksi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum period of company's research and development projects. + References No definition available. + Details
Name: | mksi_MaximumPeriodOfCompanysResearchAndDevelopmentProjects
Namespace Prefix: | mksi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage of recognized tax benefits from uncertain tax position. + References No definition available. + Details
Name: | mksi_MinimumPercentageOfRecognizedTaxBenefitsFromUncertainTaxPosition
Namespace Prefix: | mksi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum period of company's research and development projects. + References No definition available. + Details
Name: | mksi_MinimumPeriodOfCompanysResearchAndDevelopmentProjects
Namespace Prefix: | mksi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue recognition payment terms. + References No definition available. + Details
Name: | mksi_RevenueRecognitionPaymentTerms
Namespace Prefix: | mksi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of significant accounting policies [Line Items]. + References No definition available. + Details
Name: | mksi_ScheduleOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | mksi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Separately priced contracts term. + References No definition available. + Details
Name: | mksi_SeparatelyPricedContractsTerm
Namespace Prefix: | mksi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warranty period. + References No definition available. + Details
Name: | mksi_WarrantyPeriod
Namespace Prefix: | mksi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894 + Details
Name: | us-gaap_ForeignCurrencyTransactionGainLossRealized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(a)(4)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201409Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mksi_SemiconductorProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CreditConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |