COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Postretirement Obligations in Foreign Jurisdictions [Abstract]
Expected term for benefit payments of all unfunded plans	10 years
Expected future benefit payments	$ 5,785
Purchase obligations [Abstract]
Purchase obligation paid	1,500	$ 1,500
Purchase obligation, due in 2019	1,500
Contractual obligation	$ 1,502