v2.4.0.6

Derivative Financial Instruments Derivative Financial Instruments (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Derivative Financial Instruments [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] | The fair values of our derivative instruments at March 31, 2013 and December 31, 2012 were as follows:
|  |  |  | Fair Value
|  | Balance Sheet Location |  | March 31, 2013 |  | December 31, 2012
|  |  |  | (in thousands)
Asset Derivatives |  |  |  |
Derivatives not designated as hedging instruments under ASC 815-20 |  |  |  |
Foreign exchange forward contracts |  | Other current assets |  | $ | 185 |  |  | $ | 146 |
Liability Derivatives |  |  |  |  |  |
Derivatives designated as hedging instruments under ASC 815-20 |  |  |  |
Interest rate swap contracts |  | Other current liabilities |  | $ | 963 |  |  | $ | 629 |
Interest rate swap contracts |  | Other long-term obligations |  | 1,854 |  |  | 2,096 |
Derivatives not designated as hedging instruments under ASC 815-20 |  |  |  |
Foreign exchange forward contracts |  | Other current liabilities |  | 357 |  |  | 114 |
Total liability derivatives |  |  |  | $ | 3,174 |  |  | $ | 2,839 |
Offsetting Assets [Table Text Block] |
Offsetting of Derivative Assets |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Gross Amounts Not Offset in the Consolidated Balance Sheets |  |
| Gross Amounts of Recognized Assets |  | Gross Amounts Offset in the Consolidated Balance Sheets |  | Net Amounts of Assets Presented in the Consolidated Balance Sheets |  | Derivative Financial Instruments |  | Cash Collateral Received |  | Net Amount
| (in thousands)
March 31, 2013 | $ | 185 |  |  | $ | — |  |  | $ | 185 |  |  | $ | (156 | ) |  | $ | — |  |  | $ | 29 |
December 31, 2012 | $ | 146 |  |  | $ | — |  |  | $ | 146 |  |  | $ | (135 | ) |  | $ | — |  |  | $ | 11 |
Offsetting Liabilities [Table Text Block] |
Offsetting of Derivative Liabilities |  |  |  |  |  |  |  |
|  |  |  |  |  |  | Gross Amounts Not Offset in the Consolidated Balance Sheets |  |
| Gross Amounts of Recognized Liabilities |  | Gross Amounts Offset in the Consolidated Balance Sheets |  | Net Amounts of Assets Presented in the Consolidated Balance Sheets |  | Derivative Financial Instruments |  | Cash Collateral Pledged |  | Net Amount
| (in thousands)
March 31, 2013 | $ | 3,174 |  |  | $ | — |  |  | $ | 3,174 |  |  | $ | (156 | ) |  | $ | — |  |  | $ | 3,018 |
December 31, 2012 | $ | 2,839 |  |  | $ | — |  |  | $ | 2,839 |  |  | $ | (135 | ) |  | $ | — |  |  | $ | 2,704 |
Accumulated OCI for Derivative and Nonderivative Instruments Designated as Hedging Instruments, Net of Tax [Table Text Block] | OCI during the reporting periods for our derivative hedging instruments, net of tax, was as follows:
| 2013 |  | 2012
| (in thousands)
Net unrealized loss on hedging instruments at January 1, | $ | (16,069 | ) |  | $ | (14,380 | )
Unrealized gain (loss) on derivative instruments | (73 | ) |  | — |
Net unrealized loss on hedging instruments at March 31, | $ | (16,142 | ) |  | $ | (14,380 | )
Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax [Table Text Block] | The before-tax effect of our cash flow derivative instruments on the Consolidated Balance Sheets and the Consolidated Statements of Operations for the three months ended March 31 were as follows:
Derivatives in ASC 815-20 Cash Flow Hedging Relationships |  | Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) |  | Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) |  | Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)
Location |  | Amount |  | Location |  | Amount
|  | 2013 |  | 2012 |  |  |  | 2013 |  | 2012 |  |  |  | 2013 |  | 2012
|  | (in thousands) |  |  |  | (in thousands) |  |  |  | (in thousands)
Three Months Ended March 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap contracts |  | $ | (92 | ) |  | $ | — |  |  | Interest expense |  | $ | — |  |  | $ | — |  |  | Interest expense |  | $ | — |  |  | $ | — |
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
Foreign Exchange Derivatives Not Designated As Hedging Instruments [Table Text Block] | The effect of our foreign exchange forward derivative instruments on the Consolidated Statements of Operations for the three months ended March 31 was as follows:
Derivatives Not Designated as Hedging Instrument under ASC 815-20 |  | Gain (Loss) Recognized on Derivatives in Other Income (Expense)
|  | Three Months Ended March 31,
|  | 2013 |  | 2012
|  | (in thousands)
Foreign exchange forward contracts |  | $ | 214 |  |  | $ | (177 | )

X
- Details
Name: | itri_DerivativeFinancialInstrumentsAbstract
Namespace Prefix: | itri_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements. + References No definition available. + Details
Name: | itri_OffsettingAssetsTableTextBlock
Namespace Prefix: | itri_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements. + References No definition available. + Details
Name: | itri_OffsettingLiabilitiesTableTextBlock
Namespace Prefix: | itri_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effective portion of gains and losses on derivative instruments (and nonderivative instruments) designated and qualifying in cash flow hedges recorded in accumulated other comprehensive income (loss) during the term of the hedging relationship and reclassified into earnings during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effective portion of gains and losses on derivative instruments (and nonderivative instruments) designated and qualifying in net investment hedges recorded in accumulated other comprehensive income (loss) during the term of the hedging relationship and reclassified into earnings during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfNetInvestmentHedgesInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for other derivative instruments not designated as hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration