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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, 2019 USD ($) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 BRL (R$)
Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 26,150 |  |  |  | R$ 102,793
Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar | R$ |  | R$ 137,000 |  |  |
Foreign Currency Exchange Rate, Translation | 3.9 |  |  |  | 3.9
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Aluminum Futures Contracts [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 20,200 |  | $ 25,400 |  |
Amount of pre-tax gain (loss) recognized in other comprehensive income | (2,359) |  | (1,123) | $ 1,501 |
Selling, General and Administrative Expenses [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) |  |  |  | (43) |
Amount of pre-tax gain (loss) recognized in other comprehensive income | (856) |  | (2,105) | (561) |
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) | 62 |  | 62 | 62 |
Amount of pre-tax gain (loss) recognized in other comprehensive income | 0 |  | 0 | 0 |
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) | (2,736) |  | $ 1,069 | $ 1,210 |
Jan-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,100 |  |  |  | R$ 8,169
Foreign Currency Exchange Rate, Translation | 3,890.0 |  |  |  | 3,890.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Feb-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,589
Foreign Currency Exchange Rate, Translation | 3,904.0 |  |  |  | 3,904.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Mar-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,597
Foreign Currency Exchange Rate, Translation | 3,907.6 |  |  |  | 3,907.6
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Apr-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,609
Foreign Currency Exchange Rate, Translation | 3,913.1 |  |  |  | 3,913.1
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
May-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,621
Foreign Currency Exchange Rate, Translation | 3,918.8 |  |  |  | 3,918.8
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Jun-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,635
Foreign Currency Exchange Rate, Translation | 3,924.9 |  |  |  | 3,924.9
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Jul-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,652
Foreign Currency Exchange Rate, Translation | 3,932.6 |  |  |  | 3,932.6
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Aug-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,671
Foreign Currency Exchange Rate, Translation | 3,941.3 |  |  |  | 3,941.3
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Sep-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,689
Foreign Currency Exchange Rate, Translation | 3,949.5 |  |  |  | 3,949.5
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Oct-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,707
Foreign Currency Exchange Rate, Translation | 3,957.9 |  |  |  | 3,957.9
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Nov-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,200 |  |  |  | R$ 8,725
Foreign Currency Exchange Rate, Translation | 3,966.0 |  |  |  | 3,966.0
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Dec-20 [Member] [Member] | Terphane Ltda [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 2,050 |  |  |  | R$ 8,129
Foreign Currency Exchange Rate, Translation | 3,965.3 |  |  |  | 3,965.3
Percentage of Coverage Using Cash Flow Hedges | 0.00% |  |  |  | 0.00%
Cash Flow Hedging [Member] | Foreign Currency Forwwards And Options [Member] |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Foreign Currency Cash Flow Hedge Derivative at Fair Value, Net | $ (800) |  |  |  |

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