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Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ 700 | $ (2,053) | $ 1,669 | $ 68
Commodity Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  |  |  | (73)
Other comprehensive income | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | 297 | (1,561) | 1,063 | 551
Other comprehensive income | Commodity Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  |  |  | (218)
Product revenues | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | 435 | (524) | 675 | (605)
Selling, general and administrative expense | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  | 22 |  | 75
Foreign currency (loss) gain | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ (32) | $ 10 | $ (69) | 47
Cost of sales | Commodity Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  |  |  | $ 145

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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