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Derivative Financial Instruments - Schedule of Outstanding Commodity and Currency Forward Contracts (Details) | 12 Months Ended |  |
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Dec. 31, 2016 USD ($) MMBTU T | Dec. 31, 2015 USD ($) MMBTU T | Dec. 31, 2016 JPY (¥) | Dec. 31, 2016 KRW (₩) | Dec. 31, 2016 SGD | Dec. 31, 2016 EUR (€) | Dec. 31, 2016 AUD | Dec. 31, 2015 JPY (¥) | Dec. 31, 2015 KRW (₩) | Dec. 31, 2015 SGD | Dec. 31, 2015 GBP (£) | Dec. 31, 2015 EUR (€)
Commodity contracts | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commodity units hedged, energy | MMBTU | 26,807 | 175,617 |  |  |  |  |  |  |  |  |  |
Commodity units hedged, mass | T | 3,190 | 4,811 |  |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | Japan, Yen |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | ¥ |  |  | ¥ 65,502,800 |  |  |  |  | ¥ 245,915,700 |  |  |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | Singapore, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | SGD |  |  |  |  | SGD 900,000 |  |  |  |  | SGD 1,800,000 |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | Australian Dollar |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | AUD |  |  |  |  |  |  | AUD 611,143 |  |  |  |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | European Euro |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | € |  |  |  |  |  | € 9,834,120 |  |  |  |  |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | South Korean Won |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | ₩ |  |  |  | ₩ 218,408,100 |  |  |  |  | ₩ 1,533,257,930 |  |  |
Foreign currency exchange contracts | Designated as Hedging Instrument | United States Dollar |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | $ | $ 2,311,697 |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts | Not Designated as Hedging Instrument | Japan, Yen |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | ¥ |  |  |  |  |  |  |  | ¥ 70,518,463 |  |  |  |
Foreign currency exchange contracts | Not Designated as Hedging Instrument | Singapore, Dollars |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | SGD |  |  |  |  |  |  |  |  |  | SGD 500,000 |  |
Foreign currency exchange contracts | Not Designated as Hedging Instrument | European Euro |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | € |  |  |  |  |  | € 10,502,111 |  |  |  |  |  | € 20,490,320
Foreign currency exchange contracts | Not Designated as Hedging Instrument | United States Dollar |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | $ | $ 15,318,000 | $ 17,321,106 |  |  |  |  |  |  |  |  |  |
Foreign currency exchange contracts | Not Designated as Hedging Instrument | United Kingdom, Pounds |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Currency units hedged | £ |  |  |  |  |  |  |  |  |  |  | £ 4,840,238 |

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