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PROPERTY AND EQUIPMENT, NET (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Property, Plant and Equipment [Abstract] |  |
Aggregate investment grants received | $ 285,636 | $ 285,930

X
- Definition Aggregate investment grants received to reduce the cost of fixed assets as of the balance sheet date. + References No definition available. + Details
Name: | tsem_PropertyPlantAndEquipmentNetAggregateInvestmentGrants
Namespace Prefix: | tsem_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration