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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, 2017
Dec. 31, 2016
Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Pension amortization $ (529) $ (836)
Cash flow hedges (7) (649)
Total gain (loss) (536) (1,485)
Tax benefit (expense) (161) (97)
Amounts reclassified from accumulated other comprehensive income (loss) $ (375) $ (1,388)