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Derivative Financial Instruments Terphane Future Cash Flow Hedges (Details) - Terphane Ltda [Member] R$ in Thousands, $ in Thousands	Sep. 30, 2020 USD ($)	Sep. 30, 2020 BRL (R$)
Derivative [Line Items]
Derivative, Notional Amount	$ 18,450	R$ 91,056
Percentage of Coverage Using Cash Flow Hedges	54.00%	54.00%
Foreign Currency Exchange Rate, Translation	4.9353	4.9353
Oct-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,200	R$ 8,707
Percentage of Coverage Using Cash Flow Hedges	77.00%	77.00%
Foreign Currency Exchange Rate, Translation	3.9579	3.9579
Nov-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,200	R$ 8,725
Percentage of Coverage Using Cash Flow Hedges	77.00%	77.00%
Foreign Currency Exchange Rate, Translation	3.9660	3.9660
Dec-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,050	R$ 8,129
Percentage of Coverage Using Cash Flow Hedges	72.00%	72.00%
Foreign Currency Exchange Rate, Translation	3.9653	3.9653
Jan-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,436
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4358	5.4358
Feb-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,438
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4379	5.4379
Mar-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,442
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4417	5.4417
Apr-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,446
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4462	5.4462
May-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,451
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4508	5.4508
Jun-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,454
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4539	5.4539
Jul-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,457
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4566	5.4566
Aug-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,462
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4624	5.4624
Sep-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,468
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4675	5.4675
Oct-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,473
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4733	5.4733
Nov-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,480
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4799	5.4799
Dec-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,000	R$ 5,488
Percentage of Coverage Using Cash Flow Hedges	50.00%	50.00%
Foreign Currency Exchange Rate, Translation	5.4876	5.4876

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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