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Derivative Financial Instruments Terphane Future Cash Flow Hedges (Details) - Terphane Ltda [Member] R$ in Thousands, $ in Thousands	Sep. 30, 2021 USD ($)	Sep. 30, 2021 BRL (R$)
Derivative [Line Items]
Derivative, Notional Amount	$ 24,456	R$ 134,781
Percentage of Coverage Using Cash Flow Hedges	75.00%	75.00%
Foreign Currency Exchange Rate, Translation	5.5112	5.5112
Oct-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,400	R$ 7,714
Percentage of Coverage Using Cash Flow Hedges	78.00%	78.00%
Foreign Currency Exchange Rate, Translation	5.5100	5.5100
Nov-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,784	R$ 10,097
Percentage of Coverage Using Cash Flow Hedges	81.00%	81.00%
Foreign Currency Exchange Rate, Translation	5.6597	5.6597
Aug-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,708	R$ 9,489
Percentage of Coverage Using Cash Flow Hedges	76.00%	76.00%
Foreign Currency Exchange Rate, Translation	5.5560	5.5560
Jun-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,596	R$ 8,760
Percentage of Coverage Using Cash Flow Hedges	70.00%	70.00%
Foreign Currency Exchange Rate, Translation	5.4890	5.4890
Nov-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,495	R$ 8,256
Percentage of Coverage Using Cash Flow Hedges	83.00%	83.00%
Foreign Currency Exchange Rate, Translation	5.5224	5.5224
Dec-20 [Member] [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,170	R$ 6,442
Percentage of Coverage Using Cash Flow Hedges	65.00%	65.00%
Foreign Currency Exchange Rate, Translation	5.5060	5.5060
Jan-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,677	R$ 8,948
Percentage of Coverage Using Cash Flow Hedges	72.00%	72.00%
Foreign Currency Exchange Rate, Translation	5.3360	5.3360
Feb-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,751	R$ 9,391
Percentage of Coverage Using Cash Flow Hedges	75.00%	75.00%
Foreign Currency Exchange Rate, Translation	5.3631	5.3631
Mar-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,662	R$ 8,959
Percentage of Coverage Using Cash Flow Hedges	72.00%	72.00%
Foreign Currency Exchange Rate, Translation	5.3905	5.3905
Apr-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,615	R$ 8,761
Percentage of Coverage Using Cash Flow Hedges	70.00%	70.00%
Foreign Currency Exchange Rate, Translation	5.4247	5.4247
May-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,647	R$ 8,984
Percentage of Coverage Using Cash Flow Hedges	72.00%	72.00%
Foreign Currency Exchange Rate, Translation	5.4545	5.4545
Jul-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,719	R$ 9,489
Percentage of Coverage Using Cash Flow Hedges	76.00%	76.00%
Foreign Currency Exchange Rate, Translation	5.5200	5.5200
Sep-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,780	R$ 9,953
Percentage of Coverage Using Cash Flow Hedges	80.00%	80.00%
Foreign Currency Exchange Rate, Translation	5.5915	5.5915
Oct-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,793	R$ 10,088
Percentage of Coverage Using Cash Flow Hedges	81.00%	81.00%
Foreign Currency Exchange Rate, Translation	5.6264	5.6264
Dec-21
Derivative [Line Items]
Derivative, Notional Amount	$ 1,659	R$ 9,450
Percentage of Coverage Using Cash Flow Hedges	76.00%	76.00%
Foreign Currency Exchange Rate, Translation	5.6962	5.6962

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