Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule Of Income Before Income Tax Expense (Benefit) And Equity In Earnings Of 50% Or Less Owned Companies) (Details)

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Income Taxes (Schedule Of Income Before Income Tax Expense (Benefit) And Equity In Earnings Of 50% Or Less Owned Companies) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Contingency [Line Items]      
Income before income tax expense (benefit) and equity in earnings of 50% or less owned companies $ 26,392 $ 49,097 $ 91,689
Reportable Geographical Components | United States      
Income Tax Contingency [Line Items]      
Income before income tax expense (benefit) and equity in earnings of 50% or less owned companies 20,132 41,398 33,563
Reportable Geographical Components | Foreign      
Income Tax Contingency [Line Items]      
Income before income tax expense (benefit) and equity in earnings of 50% or less owned companies 4,744 6,182 56,558
Consolidation, Eliminations      
Income Tax Contingency [Line Items]      
Income before income tax expense (benefit) and equity in earnings of 50% or less owned companies $ 1,516 $ 1,517 $ 1,568