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