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Information Relate to Effect of Derivative Instruments on Our Consolidated Income Statements (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | $ (2,051) | $ (3,564)
Cost of Sales | Foreign Currency Derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives |  | (15)
Revaluation Of Derivatives | Foreign Currency Derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | (3,926) | (5,162)
Revaluation Of Derivatives | Currency Related Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | 1,491 | (3,411)
Revaluation Of Derivatives | Commodity derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | 143 | (155)
Revaluation Of Derivatives | Series C Convertible Preferred Stock [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives |  | 2,610
Foreign Currency Gain (Loss) | Foreign Currency Derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | 1,875 | 1,613
Interest Expense [Member] | Interest Rate Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | (57) | (84)
Other Comprehensive Income (Loss) |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivatives | $ (18) | $ (206)

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- Definition Net Increase or Decrease in the fair value of the derivative or group of derivatives included in earnings. + 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 + Details
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