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FAIR VALUE MEASUREMENTS (Effect of Changes in Financial Instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2018
Mar. 31, 2017
Mar. 30, 2018
Mar. 31, 2017
Rabbi trust assets        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Changes in fair value, loss (income) $ (43) $ (753) $ (571) $ (551)