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

Aggregate investment grants received to reduce the cost of fixed assets as of the balance sheet date.

No definition available.

Name:	tsem_PropertyPlantAndEquipmentNetAggregateInvestmentGrants
Namespace Prefix:	tsem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant