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Derivative Financial Instruments - Outstanding commodity and currency forward contracts not designated as hedging (Details) - Not designated as hedging instruments - Foreign currency exchange contracts - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
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European Euro |  |
Derivative [Line Items] |  |
Notional amount | $ 8,612,505 | $ 20,490,320
United States Dollar |  |
Derivative [Line Items] |  |
Notional amount | 2,852,568 | 17,321,106
Japanese Yen |  |
Derivative [Line Items] |  |
Notional amount | 320,074,648 | 70,518,463
British Pound Sterling |  |
Derivative [Line Items] |  |
Notional amount | 0 | 4,840,238
Singapore Dollar |  |
Derivative [Line Items] |  |
Notional amount | $ 0 | $ 500,000

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + 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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- Details
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- Details
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