2.4.0.82409409 - Disclosure - Stock-Based Compensation Stock-Based Compensation Narrative (Details)truefalseIn Millions, except Share data, unless otherwise specifiedfalse1false USDfalsefalseD2013Q2_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockOptionMemberhttp://www.sec.gov/CIK0000780571duration2013-04-01T00:00:002013-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2false falsefalseD2012Q2_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockOptionMemberhttp://www.sec.gov/CIK0000780571duration2012-04-01T00:00:002012-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli03false USDfalsefalseD2013Q2YTD_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockOptionMemberhttp://www.sec.gov/CIK0000780571duration2013-01-01T00:00:002013-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$4false falsefalseD2012Q2YTD_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockOptionMemberhttp://www.sec.gov/CIK0000780571duration2012-01-01T00:00:002012-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli01false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse1false USDtruefalseD2013Q2_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockOptionMemberhttp://www.sec.gov/CIK0000780571duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseEmployee Stock Option [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EmployeeStockOptionMemberus-gaap_AwardTypeAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse0Employee Stock Option [Member]2true 3us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0[Line Items]3false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00Options generally become exercisable in three equal annual installments beginning one year from the date of grantfalsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringDescription of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Award vesting rights4false 4us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriodus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse0010 yearsfalsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaPeriod from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Stock options expiration period (years)5false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00falsefalsefalse2truefalsefalse00falsefalsefalse3truefalsefalse128000128000falsefalsefalse4truefalsefalse5400054000falsefalsefalsexbrli:sharesItemTypesharesGross number of share options (or share units) granted during the period.No definition available.false1Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross6false 4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse41000004.1USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse41000004.1USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnrecognized cost of unvested share-based compensation awards.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false2Unrecognized compensation expense7false 4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse002 years 3 months 18 daysfalsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaWeighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Unrecognized compensation expense, Expected weighted average period for recognition (years)8false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5false USDtruefalseD2013Q2YTD_us-gaap_AwardTypeAxis_us-gaap_RestrictedStockUnitsRSUMemberhttp://www.sec.gov/CIK0000780571duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseRestricted Stock Units (RSUs) [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RestrictedStockUnitsRSUMemberus-gaap_AwardTypeAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse0Restricted Stock Units (RSUs) [Member]9true 3us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0[Line Items]10false 4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2420000024.2USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2420000024.2USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryUnrecognized cost of unvested share-based compensation awards.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false2Unrecognized compensation expense11false 4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse001 year 10 months 30 daysfalsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaWeighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Unrecognized compensation expense, Expected weighted average period for recognition (years)12false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse003 yearsfalsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaPeriod which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Award vesting period13false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse6false truefalseD2013Q2YTD_us-gaap_AwardTypeAxis_itri_LongTermPerformanceRestrictedStockAwardMemberhttp://www.sec.gov/CIK0000780571duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseLong Term Performance Restricted Stock Award [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldiitri_LongTermPerformanceRestrictedStockAwardMemberus-gaap_AwardTypeAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Long Term Performance Restricted Stock Award [Member]14true 3us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0[Line Items]15false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceConditionVestingRangeLowerRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor awards with a performance condition that results in a variable percentage of shares being earned, relative to the number of awards originally granted, the lower range limit of the variable percentage range.No definition available.false0Performance Condition Vesting Range, Lower Range Limit16false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceConditionVestingRangeUpperRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse1.61.6falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor awards with a performance condition that results in a variable percentage of shares being earned, relative to the number of awards originally granted, the upper range limit of the variable percentage range.No definition available.false0Performance Condition Vesting Range, Upper Range Limit17false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionMultiplierLowerRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.750.75falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor a multiplier payout feature, which provides for the multiplication of shares earned by a percentage factor as the result of achievement against a market condition, the lower range limit of the multiplier, in percentage terms.No definition available.false0Market Condition Multiplier, Lower Range Limit18false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionMultiplierUpperRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse1.251.25falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor a multiplier payout feature, which provides for the multiplication of shares earned by a percentage factor as the result of achievement against a market condition, the upper range limit of the multiplier, in percentage terms.No definition available.false0Market Condition Multiplier, Upper Range Limit19false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardPossibleTotalPercentageOfSharesVestedLowerRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor awards whereby a variable percentage of shares will ultimately vest, relative to the number of awards originally granted, based upon the combination of multiple performance or market conditions, the lower range limit of the total variable percentage range.No definition available.false0Possible Total Percentage of Shares Vested, Lower Range Limit20false 4itri_ShareBasedCompensationArrangementByShareBasedPaymentAwardPossibleTotalPercentageOfSharesVestedUpperRangeLimititri_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse2.002.00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureFor awards whereby a variable percentage of shares will ultimately vest, relative to the number of awards originally granted, based upon the combination of multiple performance or market conditions, the upper range limit of the total variable percentage range.No definition available.false0Possible Total Percentage of Shares Vested, Upper Range Limit21false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse7false truefalseD2013Q2YTD_us-gaap_AwardTypeAxis_us-gaap_EmployeeStockMemberhttp://www.sec.gov/CIK0000780571duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseEmployee Stock [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EmployeeStockMemberus-gaap_AwardTypeAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0nanafalse0Employee Stock [Member]22true 3us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0[Line Items]23false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse553000553000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse553000553000falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false1Number of shares available for future grant under the Stock Incentive Plan24false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.10.1falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.10.1falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB 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As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false1Number of shares authorized for issuance under the share based compensation plan29false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse431758431758falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse431758431758falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesThe difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false1Number of shares available for future grant under the Stock Incentive Plan30false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDescriptionus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00The Stock Incentive Plan shares are subject to a fungible share provision such that, with respect to grants made after December 31, 2009, the authorized share reserve is reduced by (i) one share for every one share subject to a stock option or share appreciation right granted under the Plan and (ii) 1.7 shares for every one share of common stock that was subject to an award other than an option or stock appreciation right.falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringGeneral descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false0Share-based Compensation Arrangement by Share-based Payment Award, DescriptionfalseStock-Based Compensation Stock-Based Compensation Narrative (Details) (USD $)HundredThousandsNoRoundingUnKnownUnKnowntruefalsefalseSheethttp://www.itron.com/role/StockBasedCompensationStockBasedCompensationNarrativeDetails430