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Information Relate to Effect of Derivative Instruments on Our Consolidated Income Statements (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ 155 | $ (985) | $ (1,538) | $ (792)
Revaluation Of Derivatives | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | 581 | (2,036) | (694) | (2,514)
Revaluation Of Derivatives | Currency Related Swap |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | (364) | 1,045 | 1,895 | 1,315
Revaluation Of Derivatives | Commodity derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  | (2) |  | 143
Foreign Currency Gain (Loss) | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | (426) | 1,051 | (844) | 1,722
Interest Expense | Interest Rate Swap |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | 8 | (12) | 8 | (54)
Other Comprehensive Income (Loss) |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ 30 | $ (25) | $ 105 | $ (55)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + 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 Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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