Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	12.30%	(18.20%)	2.90%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	1.40%	1.50%	1.50%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	(0.60%)	9.90%	(0.20%)
Changes in estimates related to prior year tax provision	$ (383)	$ (2,472)	$ (135)
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount	$ (5,415)	$ 52	$ 60
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	1.60%	(0.80%)	0.90%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount	$ 1,053	$ 208	$ 637
Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Percent	0.30%	0.20%	(3.50%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Valuation allowance	$ 12,652	$ 17,485
Balance of unrecognized state tax positions	500
Income tax expense (benefit) at federal statutory rate	14,116	(5,260)	$ 15,121
State taxes, net of federal income tax benefit	933	(373)	1,050
Foreign rate differences	$ 8,269	$ 4,554	$ 2,247
Valuation allowance due to foreign losses and impairments	0.00%	0.00%	(19.90%)
Income tax expense (benefit) at effective income tax rate	$ 9,284	$ (8,213)	$ 13,545
Foreign Tax Credit - Brazil	7,000	4,800	2,000
Deferred Tax Assets, State Taxes	2,500	4,900	0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		12,400	12,400
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	(7,019)	(4,787)	1,999
Deferred Tax Assets, State Taxes	2,500	4,900	0
State And Foreign Net Operating Loss Carryforwards
Income Taxes [Line Items]
Operating Loss Carryforwards	33,900	18,300
Valuation allowance	9,400	5,500	2,500
Excess Capital Losses From Investments And Other Related Items
Income Taxes [Line Items]
Valuation allowance	$ 7,100	$ 700	$ 1,300
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