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TAXES ON INCOME (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 22, 2017 | Jan. 31, 2017 | Aug. 31, 2013 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred Income tax rate not within Development Zone A |  |  |  |  |  |  | 12.00% | 16.00% | 12.50% | 15.00% | 15.00%
Preferred Income tax rate for Development Zone A |  |  |  |  |  |  | 6.00% | 9.00% | 7.00% | 10.00% | 10.00%
Maximum tax rate on dividends distributed from Preferred Income. |  |  |  | 20.00% |  |  | 15.00% |  |  |  |
Corporate tax rate for Israel |  |  |  |  | 24.00% | 25.00% | 26.50% | 26.50% |  |  |
U.S. subsidiaries tax rate, federal and state |  |  |  |  | 38.00% | 38.00% | 38.00% |  |  |  |
Reduction of corporate tax rate |  |  | 25.00% |  |  |  |  |  |  |  |
Uniform tax rate for Development Zone A |  |  | 7.50% |  |  |  |  |  |  |  |
Deferred tax asset, state operating loss carryforward | $ 3,417 |  |  |  | $ 3,417 | $ 3,409 |  |  |  |  |
Deferred tax asset, capital loss carryforward | $ 75 |  |  |  | 75 | $ 347 |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Statutory tax rate changes |  | 21.00% |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Statutory tax rate changes |  | 35.00% |  |  |  |  |  |  |  |  |
Tax Year 2017 [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reduction of corporate tax rate | 24.00% |  |  |  |  |  |  |  |  |  |
Tax Year 2018 [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reduction of corporate tax rate | 23.00% |  |  |  |  |  |  |  |  |  |
U.S. Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred tax asset, state operating loss carryforward | $ 1,431 |  |  |  | 1,431 |  |  |  |  |  |
Increase decrease in deferred tax assets |  |  |  |  | 414 |  |  |  |  |  |
TAT Technologies Ltd [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred Income tax rate not within Development Zone A |  |  |  |  |  |  |  | 16.00% | 12.50% | 15.00% | 15.00%
Deferred tax asset, capital loss carryforward | $ 1,495 |  |  |  | $ 1,495 |  |  |  |  |  |
Turbo chrome [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred Income tax rate for Development Zone A |  |  |  |  |  | 9.00% | 9.00% | 9.00% | 7.00% | 10.00% | 10.00%

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