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Business Combinations (Tables) | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Schedule Of Revenues and Earnings Attributable to an Acquired Business [Table Text Block] | The following table presents the revenues and net income (loss) from SSNI operations that are included in our Consolidated Statements of Operations:
|  | January 5, 2018 - March 31, 2018
Revenues |  | $ | 85,833 |
Net loss |  | (29,753 | )
SIlver Spring Networks, Inc. [Member] |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Business Acquisition, Pro Forma Information [Table Text Block] |  | The following supplemental pro forma results are based on the individual historical results of Itron and SSNI, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2017.
| Three Months Ended March 31,
| 2018 |  | 2017
| ( in thousands)
Revenues | $ | 607,221 |  |  | $ | 527,855 |
Net loss | (130,966 | ) |  | (27,234 | )
Comverge [Member] |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Business Acquisition, Pro Forma Information [Table Text Block] |  | The following supplemental pro forma results are based on the individual historical results of Itron and Comverge, with adjustments to give effect to the combined operations as if the acquisition had been consummated on January 1, 2016.
| Three Months Ended March 31,
| 2018 |  | 2017
| ( in thousands)
Revenues | $ | 607,221 |  |  | $ | 491,762 |
Net income (loss) | (145,270 | ) |  | 15,107 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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