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TAXES ON INCOME (Schedule of Income before Income Tax, Domestic And Foreign) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Taxes on Income [Line Items] |  |  |
Income before taxes on income | $ 129,660 | $ 144,481 | $ 171,410
Domestic Country [Member] |  |  |
Taxes on Income [Line Items] |  |  |
Income before taxes on income | 188,070 | 131,111 | 122,952
Foreign Country [Member] |  |  |
Taxes on Income [Line Items] |  |  |
Income before taxes on income | $ (58,410) | $ 13,370 | $ 48,458

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: 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)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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