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INCOME TAXES (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
INCOME TAXES [Abstract]    
Enterprise tax rate 20.00%tsem_EnterpriseStatusTaxRate  
Federal statutory rate 26.50%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate  
Deferred tax asset $ 7,816us-gaap_DeferredTaxAssetsNetCurrent $ 6,010us-gaap_DeferredTaxAssetsNetCurrent
Deferred tax liability 75,278us-gaap_DeferredTaxLiabilitiesNoncurrent 13,611us-gaap_DeferredTaxLiabilitiesNoncurrent
Valuation allowance 297,024us-gaap_DeferredTaxAssetsValuationAllowance 258,678us-gaap_DeferredTaxAssetsValuationAllowance
Tower [Member]    
Tax Credit Carryforward [Line Items]    
Net operating loss carry forwards 1,400,000us-gaap_OperatingLossCarryforwards
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Jazz [Member]    
Tax Credit Carryforward [Line Items]    
Unrecognized tax benefits related to tax return which its statute of limitation may expire in March 2015 11,000us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
/ dei_LegalEntityAxis
= tsem_JazzMember
 
Net operating loss carry forwards, annual utilization amount 2,100tsem_OperatingLossCarryforwardsAnnualUtilizationAmount
/ dei_LegalEntityAxis
= tsem_JazzMember
 
Jazz [Member] | Federal [Member]    
Tax Credit Carryforward [Line Items]    
Net operating loss carry forwards 31,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
/ dei_LegalEntityAxis
= tsem_JazzMember
 
Jazz [Member] | State [Member]    
Tax Credit Carryforward [Line Items]    
Net operating loss carry forwards 141,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ dei_LegalEntityAxis
= tsem_JazzMember
 
TJP [Member]    
Tax Credit Carryforward [Line Items]    
Net operating loss carry forwards 9,000us-gaap_OperatingLossCarryforwards
/ dei_LegalEntityAxis
= tsem_TowerJazzJapanLimitedMember
 
Tower Jazz Panasonic Semiconductor Company Ltd [Member]    
Tax Credit Carryforward [Line Items]    
Net operating loss carry forwards $ 12,000us-gaap_OperatingLossCarryforwards
/ dei_LegalEntityAxis
= tsem_TowerJazzPanasonicSemiconductorCompanyLtdMember