The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

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-Paragraph 1

-Subparagraph (SX 210.7-04.22)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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-Paragraph 2

-Subparagraph (SX 210.5-03.18)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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-Name Accounting Research Bulletin (ARB)

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-Subparagraph a

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-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Research Bulletin (ARB)

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-Name Emerging Issues Task Force (EITF)

-Number 87-21

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Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

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-Paragraph 1

-Subparagraph (SX 210.7-04.19)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 19

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28, 29, 30

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Reference 16: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

-Article 9

+ Details

- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

+ References+ Details

Quarterly Results (Unaudited) Quarterly Results (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended			3 Months Ended								12 Months Ended		3 Months Ended								12 Months Ended		3 Months Ended								12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Mar. 31, 2011 First Quarter [Member]	Mar. 31, 2010 First Quarter [Member]	Jun. 30, 2011 Second Quarter [Member]	Jun. 30, 2010 Second Quarter [Member]	Sep. 30, 2011 Third Quarter [Member]	Sep. 30, 2010 Third Quarter [Member]	Dec. 31, 2011 Fourth Quarter [Member]	Dec. 31, 2010 Fourth Quarter [Member]	Dec. 31, 2011 Maximum [Member]	Dec. 31, 2010 Maximum [Member]	Mar. 31, 2011 Maximum [Member] First Quarter [Member]	Mar. 31, 2010 Maximum [Member] First Quarter [Member]	Jun. 30, 2011 Maximum [Member] Second Quarter [Member]	Jun. 30, 2010 Maximum [Member] Second Quarter [Member]	Sep. 30, 2011 Maximum [Member] Third Quarter [Member]	Sep. 30, 2010 Maximum [Member] Third Quarter [Member]	Dec. 31, 2011 Maximum [Member] Fourth Quarter [Member]	Dec. 31, 2010 Maximum [Member] Fourth Quarter [Member]	Dec. 31, 2011 Minimum [Member]	Dec. 31, 2010 Minimum [Member]	Mar. 31, 2011 Minimum [Member] First Quarter [Member]	Mar. 31, 2010 Minimum [Member] First Quarter [Member]	Jun. 30, 2011 Minimum [Member] Second Quarter [Member]	Jun. 30, 2010 Minimum [Member] Second Quarter [Member]	Sep. 30, 2011 Minimum [Member] Third Quarter [Member]	Sep. 30, 2010 Minimum [Member] Third Quarter [Member]	Dec. 31, 2011 Minimum [Member] Fourth Quarter [Member]	Dec. 31, 2010 Minimum [Member] Fourth Quarter [Member]	Dec. 31, 2011 Itron International [Member]
Quarterly Results [Line Items]
Revenues	$ 2,434,124	$ 2,259,271	$ 1,687,447	$ 563,691	$ 497,623	$ 612,401	$ 567,339	$ 615,555	$ 573,651	$ 642,477	$ 620,658
Gross profit	746,458	700,675	539,963	184,978	157,667	191,951	174,668	176,996	182,363	192,533	185,977
Net income (loss)	(510,157)	104,770	(2,249)	27,120	25,250	34,436	25,311	(517,082)	27,639	(54,631)	26,570
Earnings (loss) per common share-Basic	$ (12.56)	$ 2.60	$ (0.06)	$ 0.67	$ 0.63	$ 0.85	$ 0.63	$ (12.70)	$ 0.68	$ (1.35)	$ 0.66
Earnings (loss) per common share - Diluted	$ (12.56)	$ 2.56	$ (0.06)	$ 0.66	$ 0.62	$ 0.84	$ 0.61	$ (12.70)	$ 0.68	$ (1.35)	$ 0.65
Stock Price												$ 64.04	$ 81.95	$ 64.04	$ 75.96	$ 55.99	$ 81.95	$ 49.40	$ 66.87	$ 38.49	$ 67.58	$ 27.52	$ 52.03	$ 51.12	$ 59.12	$ 46.68	$ 61.60	$ 29.50	$ 52.05	$ 27.52	$ 52.03
Goodwill, Impairment Loss	584,847	0	0																													584,847
Restructuring expense	$ 68,082	$ 0	$ 0