Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2012

Intangible Assets [Abstract]

Schedule Of Intangible Assets Subject To Amortization

	September 30, 2012			September 30, 2011
	Gross Carrying Value	Accumulated Amortization	Net Carrying Value	Gross Carrying Value	Accumulated Amortization	Net Carrying Value
Supply agreement	$ 17,580	$ (7,225)	$ 10,355	$ 17,580	$ (6,052)	$ 11,528
Purchased technology	11,818	(9,121)	2,697	11,747	(7,759)	3,988
Non-compete agreements	4,170	(4,170)	—	4,170	(4,170)	—
Trade name	1,136	(871)	265	1,098	(767)	331
Total	$ 34,704	$ (21,387)	$ 13,317	$ 34,595	$ (18,748)	$ 15,847

Schedule Of Estimated Amortization Expense

Years Ending September 30,	Total
2013	$ 1,673
2014	1,673
2015	1,649
2016	1,576
2017	1,576