Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Income tax expense (benefit)	$ (54,125)	$ 4,389	$ 9,284
Income tax expense (benefit) at effective income tax rate	33.80%	13.40%	13.80%
Foreign Tax Credit - Brazil	$ 900	$ 3,900	$ 7,000
Deferred Tax Assets, Tax Credit Carryforwards	16,700	15,300
Operating Loss Carryforwards	16,500	9,600
Deferred Tax Asset, Interest Carryforward	2,600
Less: Valuation allowance	15,078	13,807
Deferred Tax Assets, State Taxes	2,200	2,800	2,500
State And Foreign Net Operating Loss Carryforwards
Income Taxes [Line Items]
Less: Valuation allowance	12,900	$ 10,300	$ 9,400
Excess Capital Losses From Investments And Other Related Items
Income Taxes [Line Items]
Less: Valuation allowance	$ 700
Maximum
Income Taxes [Line Items]
Net Operating Loss Carrforward Expiration Period	20 years
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%