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Derivative Financial Instruments Terphane Future Cash Flow Hedges (Details) - Terphane Ltda [Member] R$ in Thousands, $ in Thousands	Sep. 30, 2018 BRL (R$)	Sep. 30, 2018 USD ($)
Derivative [Line Items]
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Derivative, Notional Amount, Net	R$ 110,358	$ 29,700
Foreign Currency Exchange Rate, Translation	3,715.8	3,715.8
Oct-2018 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,830	$ 2,250
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,480.1	3,480.1
Nov-18 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,850	$ 2,250
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,488.7	3,488.7
Dec-18 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,868	$ 2,250
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,496.9	3,496.9
Jan-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,380	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,644.2	3,644.2
Feb-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,397	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,652.7	3,652.7
Mar-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,410	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,659.3	3,659.3
Apr-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,430	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,669.0	3,669.0
May-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,451	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,679.5	3,679.5
Jun-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,473	$ 2,025
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,690.4	3,690.4
Jul-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 6,989	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,882.6	3,882.6
Aug-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,011	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,895.0	3,895.0
Sep-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,033	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,907.0	3,907.0
Oct-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,056	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,920.3	3,920.3
Nov-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,080	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,933.1	3,933.1
Dec-19 [Member]
Derivative [Line Items]
Derivative, Notional Amount	R$ 7,102	$ 1,800
Percentage of Coverage Using Cash Flow Hedges	0.00%	0.00%
Foreign Currency Exchange Rate, Translation	3,945.5	3,945.5

X

- 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

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- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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