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Income Taxes (Schedule Of Effective Income Tax Rate For Continuing Operations) (Details) - USD ($)
 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ 12,562,000 $ 383,000
Income tax expense at federal statutory rate 21.00% 21.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount $ 0 $ 1,788,000
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount $ 1,864,000 $ 1,159,000
State taxes, net of federal income tax benefit 1.10% 4.80%
Income tax contingency accruals and tax settlements (4.20%) 26.40%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount $ (188,000) $ (414,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent 0.00% 98.20%
Effective Income Tax Rate Reconciliation Capital Loss Carryforwards Valuation Allowance, Amount $ 0 $ 245,000
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount $ (475,000) $ (318,000)
Changes in estimates related to prior year tax provision (0.30%) (22.70%)
Non-deductible expenses 0.60% 12.60%
Valuation allowance for foreign operating loss carry-forwards (4.00%) 10.10%
Research and development tax credit (0.80%) (17.40%)
Foreign rate differences 3.10% 63.60%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount $ 633,000 $ 87,000
Foreign tax incentives (3.60%) (73.80%)
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount $ (1,016,000)  
Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent (1.70%)  
effective income tax rate reconciliation, valuation allowance due to foreign losses $ (2,395,000) $ 185,000
Valuation allowance for capital loss carry-forwards 0.00% 13.40%
Effective Income Tax Rate Reconciliation, Deduction, Amount $ (8,424,000) $ (3,135,000)
Effective income tax rate for income from continuing operations (14.10%) (172.10%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount $ (148,000) $ 173,000
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent (0.20%) 9.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount $ 363,000 $ 230,000
Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount (2,527,000) 480,000
Effective Income Tax Rate Reconciliation Amount - FDII $ (633,000) $ (472,000)
Effective Income Tax Rate Reconciliation Percent - FDII (1.10%) (25.90%)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount $ (2,157,000) $ 1,344,000
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income $ 2,541,000 $ 953,000
Effective Income Tax Rate Reconciliation - U.S. Tax on Foreign Branch Income - Percentage 4.20% 52.30%