OTHER COMPREHENSIVE INCOME (LOSS)-AOCI (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (77,464)	$ (81,241)
Foreign currency translation adjustments [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(41,550)	(42,894)
Pension and other defined benefit plans [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(35,711)	(37,343)
Gain on cash flow hedge [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (203)	$ (1,004)