v2.4.1.9

Commitments and Contingencies Extended Warranty (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Ending balance | $ 76,600 us-gaap_DeferredRevenue | $ 69,800 us-gaap_DeferredRevenue
Less: current portion of unearned revenue for extended warranty | 43,436 us-gaap_DeferredRevenueCurrent | 37,163 us-gaap_DeferredRevenueCurrent
Extended Warranty [Member] |  |
Beginning balance | 33,528 us-gaap_DeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | 31,960 us-gaap_DeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Unearned revenue for new extended warranties | 3,529 us-gaap_DeferredRevenueAdditions / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | 4,039 us-gaap_DeferredRevenueAdditions / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Unearned revenue recognized | (2,655)us-gaap_DeferredRevenueRevenueRecognized / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | (2,210)us-gaap_DeferredRevenueRevenueRecognized / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Effect of change in exchange rates | (264)itri_DeferredRevenueCurrencyTranslationIncreaseDecrease / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | (261)itri_DeferredRevenueCurrencyTranslationIncreaseDecrease / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Ending balance | 34,138 us-gaap_DeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | 33,528 us-gaap_DeferredRevenue / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Less: current portion of unearned revenue for extended warranty | 2,759 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | 2,385 us-gaap_DeferredRevenueCurrent / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember
Long-term unearned revenue for extended warranty within Other long-term obligations | $ 31,379 us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember | $ 31,143 us-gaap_DeferredRevenueNoncurrent / us-gaap_DeferredRevenueArrangementTypeAxis = itri_ExtendedWarrantyMember

X
- Definition Total increase or decrease in the deferred revenue liability due to currency translation. + References No definition available. + Details
Name: | itri_DeferredRevenueCurrencyTranslationIncreaseDecrease
Namespace Prefix: | itri_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 + Details
Name: | us-gaap_DeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DeferredRevenueArrangementTypeAxis=itri_ExtendedWarrantyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |