v2.4.0.6

Commitments and Contingencies Commitments and Contingencies Narrative (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012
Cell Relay Battery Replacements in North America [Member] |
Warranty charge | $ 1.8
Certain Products in Brazil and France [Member] |
Warranty charge | $ 2.3

X
- Definition This tag is used to for specific cases of warranty charges (adjustments) disclosed. This is a subset of the tag itri_WarrantyChangesAndAdjustments, which is defined as "Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting product warranties (including adjustments for changes in estimates)." + References No definition available. + Details
Name: | itri_WarrantyCharge
Namespace Prefix: | itri_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration