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INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INCOME TAXES [Abstract]
Tax expense (benefit) computed at statutory rates	$ (6,920)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	$ (29,262)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	$ (15,736)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Effect of different tax rates in different jurisdictions	(18,453)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate	1,408us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate	7,514us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Gain on acquisition of TPSCo	(33,280)tsem_IncomeTaxReconciliationGainOnAcquisitionOfBusiness
Tax benefits for which deferred taxes were not recorded	27,757us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	20,139us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	15,955us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Permanent differences and other, net	6,154us-gaap_IncomeTaxReconciliationOtherAdjustments	(1,673)us-gaap_IncomeTaxReconciliationOtherAdjustments	(407)us-gaap_IncomeTaxReconciliationOtherAdjustments
Income tax provision (benefit)	$ (24,742)us-gaap_IncomeTaxExpenseBenefit	$ (9,388)us-gaap_IncomeTaxExpenseBenefit	$ 7,326us-gaap_IncomeTaxExpenseBenefit

X

- Definition

Represents the amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the gain on acquisition of a business.

+ References

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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