OTHER EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income and Expenses [Abstract]
Foreign currency transaction gain (loss), before tax	$ 150	$ (17)	$ 535	$ (236)
Investment income, net	(14)	104	18	1,365
Net periodic benefit income	$ 787	$ 958	$ 2,361	$ 2,722