GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Goodwill [Roll Forward]
Beginning Balance		$ 41,148
Correction of prior period error	1,712
Foreign exchange fluctuation		1,760
Ending Balance		44,620	41,148
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization		31,793	31,085
Accumulated Amortization		20,510	17,624
Other intangible assets [Abstract]
Increase in other intangible assets due to foreign currency fluctuations		553	275
Intangible assets acquired		155
Amortization expense		2,682	2,720	2,426
Indefinite-lived Intangible Assets by Major Class [Line Items]
Total other intangible assets		32,983	32,275
Estimated future amortization expense [Abstract]
2013		2,637
2014		2,510
2015		2,442
2016		2,020
2017		1,187
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount not subject to amortization		1,190	1,190
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization		8,387	8,266
Accumulated Amortization		4,902	3,890
Acquired Patents and Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization		8,270	8,115
Accumulated Amortization		6,775	6,446
Trade Secrets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization		2,550	2,550
Accumulated Amortization		2,550	2,550
Distribution Rights, Customer relationships, and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization		12,586	12,154
Accumulated Amortization		$ 6,283	$ 4,738