Investment In And Loans To Dynamic Fuels (Schedule Of Equity Method Investments, Statement Of Operations) (Details) (Dynamic Fuels, LLC [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Dynamic Fuels, LLC [Member]
Revenue	$ 166,986	$ 127,069
Cost of Goods Sold and Operating Expenses	179,550	151,341	10,426
General and Administrative	1,595	2,516	1,616
Loss from Operations	(14,159)	(26,788)	(12,042)
Other Income (Expense)	(2,086)	(2,548)	902
Net Loss	$ (16,245)	$ (29,336)	$ (11,140)