GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Goodwill [Roll Forward]
Beginning Balance			$ 44,620
Ending Balance	43,916		43,916
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	31,535		31,535		31,793
Accumulated Amortization	21,700		21,700		20,510
Other intangible assets [Abstract]
Amortization expense	658	675	1,319	1,344
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount not subject to amortization	1,190		1,190		1,190
Estimated future amortization expense [Abstract]
Remainder of 2013	1,303		1,303
2014	2,480		2,480
2015	2,412		2,412
2016	1,996		1,996
2017	1,166		1,166
Total other intangible assets, gross carrying amount	32,725		32,725		32,983
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	8,331		8,331		8,387
Accumulated Amortization	5,353		5,353		4,902
Acquired Patents and Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	8,270		8,270		8,270
Accumulated Amortization	6,985		6,985		6,775
Trade Secrets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	2,550		2,550		2,550
Accumulated Amortization	2,550		2,550		2,550
Distribution Rights, Customer relationships, and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	12,384		12,384		12,586
Accumulated Amortization	$ 6,812		$ 6,812		$ 6,283