OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Summary of Amounts Reclassified from Accumulated Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Pension amortization	$ (836)	$ (595)	$ (1,672)	$ (1,189)
Cash flow hedges	(172)	684	(821)	1,089
Total gain (loss)	(1,008)	89	(2,493)	(100)
Tax benefit (expense)	(303)	3	(748)	(77)
Amounts reclassified from accumulated other comprehensive income (loss)	$ (705)	$ 86	$ (1,745)	$ (23)