GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Goodwill [Roll Forward]
Beginning Balance	$ 44,620
Ending Balance	44,982
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	31,925		31,793
Accumulated Amortization	21,231		20,510
Other intangible assets [Abstract]
Amortization expense	661	669
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount not subject to amortization	1,190		1,190
Total other intangible assets	33,115		32,983
Estimated future amortization expense [Abstract]
Remainder of 2013	1,990
2014	2,526
2015	2,458
2016	2,033
2017	1,197
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	8,416		8,387
Accumulated Amortization	5,160		4,902
Acquired Patents and Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount subject to amortization	8,270		8,270
Accumulated Amortization	6,880		6,775
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	12,689		12,586
Accumulated Amortization	$ 6,641		$ 6,283