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OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Summary of Amounts Reclassified from Accumulated Other Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
OCI, Net of Tax [Abstract]    
Pension amortization $ (226) $ (529)
Cash flow hedges 682 (7)
Total gain (loss) 456 (536)
Tax benefit (expense) 158 (161)
Amounts reclassified from accumulated other comprehensive income (loss) $ 298 $ (375)