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Derivative Financial Instruments (Narrative) (Details)
R$ in Thousands, $ in Thousands, lbs in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
lbs
Mar. 31, 2022
BRL (R$)
Mar. 31, 2022
BRL (R$)
lbs
Dec. 31, 2021
USD ($)
lbs
Derivative [Line Items]        
Amounts of unrealized after tax gains (losses) to be Reclassified within Twelve Months $ (3,500)      
Aluminum Futures Contracts        
Derivative [Line Items]        
Derivative, Notional Amount $ 24,200     $ 22,100
Commitment Under Cash Flow Hedges, Mass | lbs 14.3   14.3 14.9
Terphane Ltda [Member]        
Derivative [Line Items]        
Derivative, Notional Amount $ 22,801   R$ 128,210  
Terphane Ltda [Member] | Oct-2018 [Member]        
Derivative [Line Items]        
Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar | R$   R$ 150,000