XML 158 R101.htm IDEA: XBRL DOCUMENT 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
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Bonus and Profit Sharing Plans and Awards Expense $ 37,850itri_BonusAndProfitSharingPlansAndAwardsExpense $ 15,745itri_BonusAndProfitSharingPlansAndAwardsExpense $ 25,297itri_BonusAndProfitSharingPlansAndAwardsExpense