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FAIR VALUE MEASUREMENTS (Effect of Changes in Financial Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jun. 29, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Rabbi trust assets |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |
Changes in fair value, loss (income) | $ (283) | $ (499) | $ (854) | $ (1,050)

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