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Financial Instruments Financial Instruments (Summary of Location and Fair Value of Currency Forward Derivative Financial Instruments - Terphane (Details). R$ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 BRL (R$)
Derivatives, Fair Value [Line Items]
Cost of Goods and Services Sold	$ 649,690	$ 558,967	$ 641,140
Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.5108			5.5108
Percentage of Coverage Using Cash Flow Hedges	75.00%			75.00%
Derivative, Notional Amount	$ 20,391			R$ 112,370
Flexible Packaging Films [Member] [Domain]
Derivatives, Fair Value [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income	0	0	0
Aluminum Futures Contracts [Member]
Derivatives, Fair Value [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income	6,215	74	(2,359)
Derivative, Notional Amount, Net	22,100	12,100
Selling, General and Administrative Expenses [Member] | Flexible Packaging Films [Member] [Domain]
Derivatives, Fair Value [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income	(2,415)	(4,437)	(856)
Cost of Sales [Member] | Flexible Packaging Films [Member] [Domain]
Derivatives, Fair Value [Line Items]
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income to net income (effective portion)	63	62	62
Cost of Sales [Member] | Aluminum Futures Contracts [Member]
Derivatives, Fair Value [Line Items]
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income to net income (effective portion)	$ 5,787	$ (2,717)	$ (2,736)
Jan-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.3360			5.3360
Percentage of Coverage Using Cash Flow Hedges	72.00%			72.00%
Derivative, Notional Amount	$ 1,677			R$ 8,948
Feb-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.3631			5.3631
Percentage of Coverage Using Cash Flow Hedges	75.00%			75.00%
Derivative, Notional Amount	$ 1,751			R$ 9,391
Mar-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.3905			5.3905
Percentage of Coverage Using Cash Flow Hedges	72.00%			72.00%
Derivative, Notional Amount	$ 1,662			R$ 8,959
Apr-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.4247			5.4247
Percentage of Coverage Using Cash Flow Hedges	70.00%			70.00%
Derivative, Notional Amount	$ 1,615			R$ 8,761
May-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.4545			5.4545
Percentage of Coverage Using Cash Flow Hedges	72.00%			72.00%
Derivative, Notional Amount	$ 1,647			R$ 8,984
Jun-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.4890			5.4890
Percentage of Coverage Using Cash Flow Hedges	70.00%			70.00%
Derivative, Notional Amount	$ 1,596			R$ 8,760
Jul-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.5200			5.5200
Percentage of Coverage Using Cash Flow Hedges	76.00%			76.00%
Derivative, Notional Amount	$ 1,719			R$ 9,489
Aug-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.5560			5.5560
Percentage of Coverage Using Cash Flow Hedges	76.00%			76.00%
Derivative, Notional Amount	$ 1,708			R$ 9,490
Sep-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.5915			5.5915
Percentage of Coverage Using Cash Flow Hedges	80.00%			80.00%
Derivative, Notional Amount	$ 1,780			R$ 9,953
Oct-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.6264			5.6264
Percentage of Coverage Using Cash Flow Hedges	81.00%			81.00%
Derivative, Notional Amount	$ 1,793			R$ 10,088
Nov-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.6597			5.6597
Percentage of Coverage Using Cash Flow Hedges	81.00%			81.00%
Derivative, Notional Amount	$ 1,784			R$ 10,097
Dec-19 [Member] | Terphane Ltda [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Exchange Rate, Translation	5.6962			5.6962
Percentage of Coverage Using Cash Flow Hedges	76.00%			76.00%
Derivative, Notional Amount	$ 1,659			R$ 9,450

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