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Income Taxes Narrative (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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| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | |
| Effective Income Tax Rate Reconciliation, Percent | 44.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations | |
| Deferred Tax Assets, Valuation Allowance | $ 256,619,000us-gaap_DeferredTaxAssetsValuationAllowance | $ 161,026,000us-gaap_DeferredTaxAssetsValuationAllowance |
| Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 2,500,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax | |
| Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 75,400,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign | |
| Deferred Tax Assets, Tax Credit Carryforwards, General Business | 18,200,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness | |
| Excess tax benefits from employee stock plan exercises | 55,200,000itri_ExcessTaxBenefitsFromEmployeeStockPlanExercises | |
| Tax effect of excess benefits from employee stock plan exercises, which will increase our common stock when it reduces our cash taxes payable, and which is not recognized in our deferred tax assets | 20,400,000itri_TaxEffectOfExcessBenefitsFromEmployeeStockPlanExercisesWhichWillIncreaseOurCommonStockWhenItReducesOurCashTaxesPayableAndWhichIsNotRecognizedInOurDeferredTaxAssets | |
| Undistributed Earnings of Foreign Subsidiaries and Foreign Corporate Joint Ventures [Member] | ||
| Undistributed Earnings of Foreign Subsidiaries | $ 31,400,000us-gaap_UndistributedEarningsOfForeignSubsidiaries / itri_DeferredTaxLiabilityNotRecognized1Axis = itri_UndistributedEarningsofForeignSubsidiariesandForeignCorporateJointVenturesMember |
$ 22,500,000us-gaap_UndistributedEarningsOfForeignSubsidiaries / itri_DeferredTaxLiabilityNotRecognized1Axis = itri_UndistributedEarningsofForeignSubsidiariesandForeignCorporateJointVenturesMember |
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- Definition
The amount of gross income tax return deduction for employee stock plan exercises in excess of the compensation cost recorded for those instruments recognized for financial reporting purposes, which is available as of the balance sheet date to reduce future cash taxes payable and increase our common stock by amount of the tax effect of this gross deduction amount. No definition available.
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- Definition
Tax benefit associated with employee stock plan exercises, which is not recognized as a part of deferred tax assets as of the balance sheet date, and which will increase the common stock balance when such tax benefit reduces cash taxes payable. The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible general business tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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