Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2012

Derivative Instrument Detail [Abstract]

Schedule Of Derivative Contract Fair Value

The fair value of our derivative contract is presented below.

		Fair value
	Balance sheet location	March 31, 2012			September 30, 2011
		(in millions)
Liability derivatives:
Derivatives designated as hedging instruments:
Natural gas swap contracts	Other current liabilities	$	(0.3	)	$	—

Schedule Of Natural Gas Swap Contracts Outstanding

Our outstanding natural gas swap contracts at March 31, 2012 and September 30, 2011 are presented below. We terminated these swap contracts in April 2012.

	March 31,	September 30,
Rate benchmark	2012	2011
	(MMBtu)
NYMEX natural gas	191,000	406,000

Schedule Of Effects Of Derivative Contract On The Condensed Consolidated Statements Of Operations

The effects of our natural gas swap contracts on the consolidated statements of operations are presented below, net of tax.

	Three months ended						Six months ended
	March 31,						March 31,
	2012			2011			2012			2011
	(in millions)
Gain (loss) recognized in other comprehensive income (loss)	$	(0.2	)	$	(0.1	)	$	(0.5	)	$	(0.1	)
Gain reclassified from accumulated other comprehensive income (loss) into income	0.2			0.1			0.2			0.1
Ineffectiveness gain (loss) recognized in income	—			(0.1		)	—			(0.1		)