Investment In And Loans To Dynamic Fuels (Schedule Of Equity Method Investments) (Details) (Dynamic Fuels, LLC [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Dynamic Fuels, LLC [Member]
Cash and Current Assets	$ 9,337	$ 6,950
Inventory	17,509	16,555
Property, Plant and Equipment and Other Assets	150,258	146,929
Total Assets	177,104	170,434
Accounts Payable	10,241	7,210
Notes and Accounts Payable to Related Parties	29,976	32,506
Long-Term Liabilities	100,051	100,040
Total Liabilities	140,268	139,756
Total Members' Equity	36,836	30,678
Total Liabilities and Members' Equity	$ 177,104	$ 170,434