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EMPLOYEE RELATED LIABILITIES (Schedule of Amounts Recognized in Statement of Financial Position) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Postretirement Medicare Plan [Member] |  |  |
Amounts recognized in statement of financial position: |  |  |
Current liabilities | $ (65) | $ (58) | $ (37)
Non-current liabilities | (1,563) | (1,878) | (1,513)
Net amount recognized | $ (1,628) | $ (1,936) | $ (1,550)
Weighted average assumptions used: |  |  |
Discount rate | 4.50% | 3.80% | 4.50%
Rate of compensation increases |  |  |
Pension Plan [Member] |  |  |
Amounts recognized in statement of financial position: |  |  |
Non-current assets | $ 3,691 | $ 2,606 | $ 199
Non-current liabilities |  |  |
Net amount recognized | $ 3,691 | $ 2,606 | $ 199
Weighted average assumptions used: |  |  |
Discount rate | 4.40% | 3.70% | 4.30%
Rate of compensation increases |  |  |
Pre 65 [Member] | Postretirement Medicare Plan [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for next year | 6.90% | 8.30% | 7.20%
Ultimate rate | 4.50% | 4.50% | 4.50%
Year the ultimate rate is reached | 2029 | 2027 | 2025
Pre 65 [Member] | Postretirement Non Medical Plan [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for next year | 6.90% | 8.30% | 7.20%
Post 65 [Member] | Postretirement Medicare Plan [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for next year | 13.10% | 11.10% | 10.00%
Ultimate rate | 4.50% | 4.50% | 4.50%
Year the ultimate rate is reached | 2029 | 2027 | 2025
Post 65 [Member] | Postretirement Non Medical Plan [Member] |  |  |
Assumed health care cost trend rates: |  |  |
Health care cost trend rate assumed for next year | 7.90% | 11.10% | 10.00%

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