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TAXES ON INCOME (Schedule of Changes in Valuation Allowance) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Changes in Valuation Allowance |  |  |
Balance | $ 3,449 | $ 3,574 | $ 3,306
Deductions charged to expenses | (40) | (125) | 268
Balance | 3,409 | $ 3,449 | $ 3,574
Investments In Foreign Subsidiaries And Foreign Corporate Joint Ventures That Are Permanent In Nature [Member] |  |  |
Changes in Valuation Allowance |  |  |
Undistributed earnings of foreign subsidiaries | 1,746 |  |
The amount of deferred tax liability that would be recorded if foreign earnings were distributed by cash dividend | $ 402 |  |
Tax rate on recognized foreign earnings dividends | 23.00% |  |

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