OTHER COMPREHENSIVE INCOME (LOSS)-AOCI (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (52,123)	$ (60,481)
Foreign currency translation adjustments [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(33,517)	(32,227)
Pension and other defined benefit plans [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	(18,580)	(28,140)
Gain on cash flow hedge [Member]
Class of Stock [Line Items]
Accumulated other comprehensive income (loss)	$ (26)	$ (114)