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	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Dynamic Fuels, LLC [Member]
Revenue	$ 19,826	$ 53,623
Cost of Goods Sold and Operating Expenses and General and administrative	31,230	55,302
Loss from Operations	(11,404)	(1,679)
Other Income (Expense)	(388)	(450)
Net Loss	$ (11,792)	$ (2,129)