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INCOME TAXES (Summary of Earnings Before Income Taxes, Income Tax Expense and Effective Income Tax Rate) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 30, 2018
Mar. 31, 2017
Mar. 30, 2018
Mar. 31, 2017
Income Tax Disclosure [Abstract]        
Profit (loss) before income taxes $ 29,445 $ 21,837 $ 37,769 $ 21,792
Income tax expense $ 7,825 $ 7,878 $ 15,914 $ 3,777
Effective income tax rate 26.60% 36.10% 42.10% 17.30%