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Debt Credit Facility Additional Information (Details) (USD $)
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9 Months Ended | 9 Months Ended | ||||||||||
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Sep. 30, 2014
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Sep. 30, 2014
Secured Debt [Member]
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Aug. 05, 2011
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Sep. 30, 2014
Multicurrency revolving line of credit
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Dec. 31, 2013
Multicurrency revolving line of credit
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Sep. 30, 2014
Minimum [Member]
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Sep. 30, 2014
Maximum [Member]
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Sep. 30, 2014
Alternate base rate (1) [Member]
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Sep. 30, 2014
Alternate base rate (2) [Member]
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Sep. 30, 2014
Alternate base rate (3) [Member]
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Sep. 30, 2014
LIBOR interest rate [Member]
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Sep. 30, 2014
Scheduled Quarterly Repayments September 2014 through June 2016 [Domain]
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| Debt Instrument [Line Items] | ||||||||||||
| Debt Instrument, Face Amount | $ 300,000,000 | |||||||||||
| Line of credit facility, maximum borrowing capacity | 660,000,000 | |||||||||||
| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.20% | 0.40% | ||||||||||
| Debt Instrument, Collateral | All obligations under the 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 credit facility, are guaranteed by the foreign subsidiary and by its direct and indirect foreign parents. | |||||||||||
| Repayments of Secured Debt | 7,500,000 | |||||||||||
| Debt Instrument, Description of Variable Rate Basis | the prime rate | the Federal Reserve effective rate | one month LIBOR | the LIBOR rate | ||||||||
| Debt Instrument, Basis Spread on Variable Rate | 0.50% | 1.00% | 1.50% | |||||||||
| Applicable Interest Rate | 1.66% | |||||||||||
| Line of credit facility, amount outstanding | 70,000,000 | 120,000,000 | ||||||||||
| Letters of Credit Outstanding, Amount | 49,100,000 | |||||||||||
| Line of credit facility, remaining borrowing capacity | $ 540,900,000 | |||||||||||