Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

- Definition

Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

+ References+ Details

Goodwill Goodwill Narrative (Details) (USD $)	12 Months Ended
Goodwill Goodwill Narrative (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Goodwill written off related to restructuring	$ (4,767,000)	$ 7,720,000
Goodwill impairment	0	(584,847,000)	0
Itron International [Member]
Goodwill [Line Items]
Goodwill impairment		(584,800,000)
North America [Member]
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit		6,700,000
Disposal Group, Including Discontinued Operation, Goodwill		1,300,000
Goodwill written off related to restructuring	(5,400,000)
Europe [Member]
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit	675,000
Scenario, Previously Reported [Member] \| North America [Member]
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit		$ 5,400,000