ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			$ 428,964
Foreign currency translation adjustment, net of tax of $1,613	$ 3,795	$ (228)	10,152	$ (8,512)
Change in fair value, net of tax of $(90)			(164)	(781)
Reclassification adjustment into earnings, net of tax of $(56)			(101)	431
Change in pension and other postretirement liabilities, net of tax of $287	0	0	287	0
Balance, end of period	458,973		458,973
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustment, tax			1,613	(1,837)
Change in fair value, tax			(90)	(431)
Reclassification adjustment into earnings, tax			(56)	238
Change in pension and other postretirement liabilities, tax			287	0
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(6,090)	9,255
Balance, end of period	4,084	393	4,084	393
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(4,011)	10,115
Foreign currency translation adjustment, net of tax of $1,613			10,152	(8,512)
Balance, end of period	6,141	1,603	6,141	1,603
Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(901)	0
Change in fair value, net of tax of $(90)			(164)	(781)
Reclassification adjustment into earnings, net of tax of $(56)			(101)	431
Balance, end of period	(1,166)	(350)	(1,166)	(350)
Pension and Other Postretirement Liabilities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period			(1,178)	(860)
Change in pension and other postretirement liabilities, net of tax of $287			287	0
Balance, end of period	$ (891)	$ (860)	$ (891)	$ (860)