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Income Taxes (Schedule Of Federal Statutory Income Tax Rate To Income Before Income Tax) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]      
Tax at statutory rate $ 5,727 $ 11,664 $ 24,852
State taxes, net of federal tax effect (1,705) 7,553 384
Effect of foreign operations and tax incentives (5,870) (11,945) (20,703)
Change in valuation allowance (2,283) 2,114 (203)
Excess tax-benefits of stock-based compensation 118 (143) (1,658)
Provisional impact of U.S. Tax Reform 0 (4,353) 97,707
Impact of cash repatriation 0 21,612 0
GILTI 955 3,206 0
Losses in foreign jurisdictions for which no benefit has been provided 4,379 1,423 106
Change in uncertain tax benefits reserve 200 (317) 0
Other 2,323 1,910 2,421
Total income tax expense $ 3,844 $ 32,724 $ 102,906