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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes [Line Items]      
Income tax expense (benefit) $ 4,389 $ 9,284 $ (8,213)
Income tax expense (benefit) at effective income tax rate 13.40% 13.80% 32.80%
Foreign Tax Credit - Brazil $ 3,900 $ 7,000 $ 4,800
Less: Valuation allowance 13,807 12,652  
Deferred Tax Assets, State Taxes 2,800 2,500 4,900
Deferred Tax Assets, in Process Research and Development 4,800    
State And Foreign Net Operating Loss Carryforwards      
Income Taxes [Line Items]      
Operating Loss Carryforwards 24,900 33,900  
Less: Valuation allowance 10,300 9,400 5,500
Excess Capital Losses From Investments And Other Related Items      
Income Taxes [Line Items]      
Less: Valuation allowance $ 700 $ 700 $ 7,100
Terphane Ltda [Member]      
Income Taxes [Line Items]      
Income tax rate 6.25%    
Current effective tax rate 15.25%    
Percentage of social contribution on income included in current effective tax rate 9.00%    
Brazilian      
Income Taxes [Line Items]      
Federal statutory income tax rate 34.00%    
Income tax rate 25.00%    
Percentage of social contribution on income included in federal statutory income tax rate 9.00%    
Maximum      
Income Taxes [Line Items]      
Net Operating Loss Carrforward Expiration Period 20 years