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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
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Abstract] |  |  |
Tax at statutory rate | $ 25,474 | $ 23,866 | $ 31,514
State taxes, net of federal tax effect | 384 | 1,102 | 1,295
Effect of foreign operations and tax incentives | (20,703) | (15,496) | (21,820)
Change in valuation allowance | (203) | (1,152) | (19,640)
Excess tax-benefits of stock-based compensation | (1,658) | 0 | 0
Provisional impact of U.S. Tax Reform | 97,707 | 0 | 0
Losses in foreign jurisdictions for which no benefit has been provided | 106 | 2,106 | 3,711
Change in uncertain tax benefits reserve | 0 | (8,270) | (1,653)
Other | 3,640 | 1,985 | 1,231
Total income tax expense (benefit) | $ 104,747 | $ 4,141 | $ (5,362)

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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