v2.4.1.9

Restructuring Restructuring Expected Costs, Cost Recognized, and Remaining Costs to be Recognized - 2014 Projects (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 50,857 us-gaap_RestructuringCharges | $ 35,497 us-gaap_RestructuringCharges | $ 1,665 us-gaap_RestructuringCharges
Employee severance costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 41,952 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember |  |
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 5,220 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember |  |
Other restructuring costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 3,685 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember |  |
2014 Project [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 66,653 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring Charges | 55,800 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 10,853 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
2014 Project [Member] | Electricity Operating Segment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 39,730 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_ElectricityOperatingSegmentMember |  |
Restructuring Charges | 29,660 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_ElectricityOperatingSegmentMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 10,070 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_ElectricityOperatingSegmentMember |  |
2014 Project [Member] | Gas Operating Segment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 12,455 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_GasOperatingSegmentMember |  |
Restructuring Charges | 12,185 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_GasOperatingSegmentMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 270 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_GasOperatingSegmentMember |  |
2014 Project [Member] | Water Operating Segment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 1,145 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_WaterOperatingSegmentMember |  |
Restructuring Charges | 1,106 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_WaterOperatingSegmentMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 39 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = itri_WaterOperatingSegmentMember |  |
2014 Project [Member] | Corporate, Non-Segment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 13,323 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember |  |
Restructuring Charges | 12,849 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 474 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember |  |
2014 Project [Member] | Employee severance costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 47,447 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring Charges | 47,447 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 0 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
2014 Project [Member] | Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 7,952 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringCostAndReserveAxis = itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring Charges | 7,952 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 0 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringCostAndReserveAxis = itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
2014 Project [Member] | Other restructuring costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 11,254 us-gaap_RestructuringAndRelatedCostExpectedCost1 / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring Charges | 401 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |
Restructuring and Related Cost, Expected Cost Remaining | $ 10,853 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / us-gaap_RestructuringCostAndReserveAxis = us-gaap_OtherRestructuringMember / us-gaap_RestructuringPlanAxis = itri_A2014ProjectMember |  |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of expected cost remaining for the specified restructuring cost. + References No definition available. + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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