ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 9,255	$ 17,436
Increase (decrease) in OCI	(11,562)	(1,592)
Reclassifications	669	0
Income tax benefit (expense)	2,031	175
Ending Balance	393	16,019
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	10,115	18,251
Increase (decrease) in OCI	(10,349)	(1,826)
Reclassifications	0	0
Income tax benefit (expense)	1,837	258
Ending Balance	1,603	16,683
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	0	0
Increase (decrease) in OCI	(1,213)	0
Reclassifications	669	0
Income tax benefit (expense)	194	0
Ending Balance	(350)	0
Pension and Other Postretirement Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(860)	(664)
Increase (decrease) in OCI	0	0
Reclassifications	0	0
Income tax benefit (expense)	0	0
Ending Balance	(860)	(664)
Unrealized Gain (Loss) on Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	0	(151)
Increase (decrease) in OCI	0	234
Reclassifications	0	0
Income tax benefit (expense)	0	(83)
Ending Balance	$ 0	$ 0