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, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Pension amortization	$ (595)	$ (545)	$ (1,189)	$ (1,090)
Cash flow hedges	684	110	1,089	197
Available-for-sale securities	0	489	0	489
Total gain (loss)	89	54	(100)	(404)
Tax benefit (expense)	3	20	(77)	(146)
Amounts reclassified from accumulated other comprehensive income (loss)	$ 86	$ 34	$ (23)	$ (258)