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INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |  |
Tax expense (benefit) computed at statutory rates, see (*) below | [1] | $ 48,433 | $ 52,650 | $ (10,972)
Effect of tax rate change on deferred tax liabilities, net(**) | [2] | (16,078) |  |
Effect of different tax rates in different jurisdictions and Preferred Enterprise Benefit |  | (33,298) | (4,772) | 6,108
Gain on acquisition |  |  | (10,450) |
Tax benefits for which deferred taxes were not recorded, see F below |  | (15,103) | (23,489) | 11,687
Change in Valuation allowance, see F below |  | (82,772) | (6,212) | (11,153)
Permanent differences and other, net |  | (1,070) | (6,295) | (7,948)
Income tax expense (benefit) |  | $ (99,888) | $ 1,432 | $ (12,278)
[1] | The tax expense (benefit) was computed based on Tower's regular corporate tax rate of 24% for 2017, 25% for 2016 and 26.5% for 2015
[2] | Reduction in tax rates due to the U.S. Tax Reform and reduction in income tax rates in Japan.

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- Definition Represents the amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the gain on acquisition of a business. + References No definition available. + Details
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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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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from 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 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 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)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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