Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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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.

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

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+ Details

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- Definition

Nominal mass used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Details

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Derivative Financial Instruments - Outstanding commodity and currency forward contracts designated as hedging (Details) - Designated Hedging Instruments	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) MMBTU T	Dec. 31, 2016 USD ($) MMBTU T	Mar. 31, 2017 JPY (¥)	Mar. 31, 2017 KRW (₩)	Mar. 31, 2017 SGD	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 AUD	Dec. 31, 2016 JPY (¥)	Dec. 31, 2016 KRW (₩)	Dec. 31, 2016 SGD	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 AUD
Commodity contracts
Derivative [Line Items]
Commodity units hedged, energy \| MMBTU	3,579	26,807
Commodity units hedged, mass \| T	1,945	3,190
Foreign currency exchange contracts \| Australian Dollar
Derivative [Line Items]
Currency units hedged \| AUD							AUD 1,380,374					AUD 611,143
Foreign currency exchange contracts \| European Euro
Derivative [Line Items]
Currency units hedged \| €						€ 4,609,005					€ 9,834,120
Foreign currency exchange contracts \| South Korean Won
Derivative [Line Items]
Currency units hedged \| ₩				₩ 83,579,000					₩ 218,408,100
Foreign currency exchange contracts \| Singapore Dollar
Derivative [Line Items]
Currency units hedged \| SGD					SGD 300,000					SGD 900,000
Foreign currency exchange contracts \| United States Dollar
Derivative [Line Items]
Currency units hedged \| $	$ 0	$ 2,311,697
Foreign currency exchange contracts \| Japanese Yen
Derivative [Line Items]
Currency units hedged \| ¥			¥ 43,867,400					¥ 65,502,800