XML 76 R65.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Inventories - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Inventory Disclosure [Abstract] |  |  |
Inventory related excess and obsolete charges | $ 12,131 us-gaap_InventoryWriteDown | $ 21,671 us-gaap_InventoryWriteDown | $ 15,028 us-gaap_InventoryWriteDown
Special charges for obsolete inventory |  | $ 6,423 mksi_InventoryWriteDownRelatedToTechnologicalDevelopmentsAndInventoryPartsObsolescence |

X
- Definition Inventory write down related to technological developments and inventory parts obsolescence. + References No definition available. + Details
Name: | mksi_InventoryWriteDownRelatedToTechnologicalDevelopmentsAndInventoryPartsObsolescence
Namespace Prefix: | mksi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28360613&loc=d3e4542-108314 + Details
Name: | us-gaap_InventoryWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration