v2.4.0.6

Commitments and Contingencies Warranty Expense (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Warranty expense | $ 2,888 | $ 7,960

X
- Definition The expense charged against earnings for the period pertaining to warranties on the entity's goods and services granted to customers. + References No definition available. + Details
Name: | itri_WarrantyExpense
Namespace Prefix: | itri_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration