Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Sep. 30, 2013
Offsetting Derivative Assets
Derivative assets, Gross Amount Presented on the Consolidated Balance Sheets	$ 191		$ 0
Derivative assets, Netting Adjustments	(191)	[1]	0	[1]
Derivative assets, Net Amount	0		0
Offsetting Derivative Liabilities
Derivative liabilities, Gross Amount Presented on the Consolidated Balance Sheets Fair Value, Gross Liability	(2,193)		(1,586)
Derivative liabilities, Netting Adjustments	191	[1]	0	[1]
Derivative liabilities, Net Amount	$ (2,002)		$ (1,586)

[1] We have agreements in place with some of our financial trading counterparties that allow for the financial right of offset for derivative assets and derivative liabilities under the agreements.