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Debt Credit Facility Additional Information (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Aug. 05, 2011
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| Secured Debt [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Collateral |
All obligations under the 2011 credit facility are guaranteed by Itron, Inc. and material U.S. domestic subsidiaries and are secured by a pledge of substantially all of the assets of Itron, Inc. and material U.S. domestic subsidiaries, including a pledge of 100% of the capital stock of material U.S. domestic subsidiaries and up to 66% of the voting stock (100% of the non-voting stock) of their first-tier foreign subsidiaries. In addition, the obligations of any foreign subsidiary who is a foreign borrower, as defined by the 2011 credit facility, are guaranteed by the foreign subsidiary and by its direct and indirect foreign parents. |
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| 2011 Senior Secured Credit Facility [Member] |
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| Debt Instrument [Line Items] |
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| Line of credit facility, maximum borrowing capacity |
660,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
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| Proceeds from Lines of Credit |
47,700,000us-gaap_ProceedsFromLinesOfCredit / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
35,000,000us-gaap_ProceedsFromLinesOfCredit / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
80,000,000us-gaap_ProceedsFromLinesOfCredit / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
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| Multicurrency revolving line of credit |
91,469,000us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
120,000,000us-gaap_LineOfCredit / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
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| Letters of Credit Outstanding, Amount |
50,400,000us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
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| Line of credit facility, remaining borrowing capacity |
518,100,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember |
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| 2011 Senior Secured Credit Facility [Member] | USD Denominated Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Face Amount |
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300,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = itri_A2011SeniorSecuredCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = itri_UsdDenominatedTermLoanMember |
| Scheduled Quarterly Repayments September 2014 through June 2016 [Domain] | USD Denominated Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Repayments of Secured Debt |
7,500,000us-gaap_RepaymentsOfSecuredDebt / us-gaap_DebtInstrumentAxis = itri_ScheduledQuarterlyRepaymentsSeptember2014ThroughJune2016Domain / us-gaap_LongtermDebtTypeAxis = itri_UsdDenominatedTermLoanMember |
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| Minimum [Member] |
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| Debt Instrument [Line Items] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
0.20%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |
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| Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
0.40%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_RangeAxis = us-gaap_MaximumMember |
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| London Interbank Offered Rate (LIBOR) [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Description of Variable Rate Basis |
the LIBOR rate |
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| Debt Instrument, Basis Spread on Variable Rate |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / itri_InterestRateTypeAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
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| Debt Instrument, Interest Rate at Period End |
1.42%us-gaap_DebtInstrumentInterestRateEffectivePercentage / itri_InterestRateTypeAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
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| EURIBOR [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Description of Variable Rate Basis |
EURIBOR rate |
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| Debt Instrument, Basis Spread on Variable Rate |
1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / itri_InterestRateTypeAxis = itri_EURIBORMember |
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| Debt Instrument, Interest Rate at Period End |
1.27%us-gaap_DebtInstrumentInterestRateEffectivePercentage / itri_InterestRateTypeAxis = itri_EURIBORMember |
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| Alternate base rate (1) [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Description of Variable Rate Basis |
the prime rate |
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| Alternate base rate (2) [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Description of Variable Rate Basis |
the Federal Reserve effective rate |
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| Debt Instrument, Basis Spread on Variable Rate |
0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / itri_InterestRateTypeAxis = itri_AlternateBaseRate2Member |
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| Alternate base rate (3) [Member] |
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| Debt Instrument [Line Items] |
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| Debt Instrument, Description of Variable Rate Basis |
one month LIBOR |
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| Debt Instrument, Basis Spread on Variable Rate |
1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / itri_InterestRateTypeAxis = itri_AlternateBaseRate3Member |
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