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LONG-TERM LOANS FROM BANKS (Revolving Credit) (Narrative) (Details)
In Thousands, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2014
Jazz [Member]
USD ($)
Dec. 31, 2014
Jazz [Member]
Prime Rate [Member]
Minimum [Member]
Dec. 31, 2014
Jazz [Member]
Prime Rate [Member]
Maximum [Member]
Dec. 31, 2014
Jazz [Member]
LIBOR [Member]
Minimum [Member]
Dec. 31, 2014
Jazz [Member]
LIBOR [Member]
Maximum [Member]
Dec. 31, 2014
TJP [Member]
Dec. 31, 2013
TJP [Member]
U.S. Dollars [Member]
USD ($)
Dec. 31, 2014
TJP [Member]
JPY [Member]
JPY (¥)
Dec. 31, 2014
TJP [Member]
TIBOR or LIBOR [Member]
Line of Credit Facility [Line Items]                  
Term 5 years         3 years      
Maximum borrowing amount $ 70,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= tsem_JazzMember
            ¥ 4,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ tsem_BankLoansCurrencyAxis
= tsem_JapaneseYenMember
/ dei_LegalEntityAxis
= tsem_TowerJazzJapanLimitedMember
 
Basis spread over variable interest rate   0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= tsem_JazzMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= tsem_JazzMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
1.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= tsem_JazzMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= tsem_JazzMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
      2.60%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= tsem_TowerJazzJapanLimitedMember
/ us-gaap_VariableRateAxis
= tsem_TokyoInterbankOfferedRateOrLondonInterbankOfferedRateMember
Borrowing capacity 54,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= tsem_JazzMember
          25,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ tsem_BankLoansCurrencyAxis
= tsem_UnitedStatesDollarsMember
/ dei_LegalEntityAxis
= tsem_TowerJazzJapanLimitedMember
   
Borrowing utilized amount 24,000tsem_LineOfCreditFacilityBorrowingCapacityUtilized
/ dei_LegalEntityAxis
= tsem_JazzMember
               
Amount outstanding 19,100us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= tsem_JazzMember
          11,000us-gaap_LineOfCredit
/ tsem_BankLoansCurrencyAxis
= tsem_UnitedStatesDollarsMember
/ dei_LegalEntityAxis
= tsem_TowerJazzJapanLimitedMember
   
Letters of credit outstanding amount $ 5,000us-gaap_LettersOfCreditOutstandingAmount
/ dei_LegalEntityAxis
= tsem_JazzMember
               
Maturity date Dec. 31, 2018