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INCOME TAXES (Provision for income taxes and the effective tax rate) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Apr. 01, 2017
Apr. 02, 2016
Income Tax Disclosure [Abstract]        
Income before income taxes $ 33,923 $ 12,134 $ 52,114 $ 10,778
Income tax expense 4,882 7,045 7,490 5,780
Net income $ 29,041 $ 5,089 $ 44,624 $ 4,998
Effective tax rate 14.40% 58.10% 14.40% 53.60%