OTHER COMPREHENSIVE INCOME (LOSS) (Details) - Summary of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pre-tax
Foreign currency translation adjustments	$ 4,801	$ 2,809	$ (41,083)	$ 896
Pension and other defined benefit plans	545	491	1,635	2,682
Gain on cash flow hedge	278	0	74	0
Available-for-sale securities			(1,370)	0
Total other comprehensive income (loss)	5,624	3,300	(40,744)	3,578
Tax
Pension and other defined benefit plans	(192)	(174)	(576)	(950)
Gain on cash flow hedge	(69)	0	(19)	0
Available-for-sale securities			500	0
Total other comprehensive income (loss)	(261)	(174)	(95)	(950)
Net of tax
Foreign currency translation adjustments	4,801	2,809	(41,083)	896
Pension and other defined benefit plans	353	317	1,059	1,732
Gain on cash flow hedge	209	0	55	0
Available-for-sale securities	0	0	(870)	0
Total other comprehensive income (loss), net of taxes	$ 5,363	$ 3,126	$ (40,839)	$ 2,628