v2.4.1.9

Defined Contribution Bonus and Profit Sharing Plans Schedule of Bonus and Profit Sharing Plans Expense (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Bonus and Profit Sharing Plans and Awards Expense | $ 37,850 itri_BonusAndProfitSharingPlansAndAwardsExpense | $ 15,745 itri_BonusAndProfitSharingPlansAndAwardsExpense | $ 25,297 itri_BonusAndProfitSharingPlansAndAwardsExpense

X
- Definition Expense recognized in the period related to bonus and profit sharing plans and other awards for employee achievement. + References No definition available. + Details
Name: | itri_BonusAndProfitSharingPlansAndAwardsExpense
Namespace Prefix: | itri_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration