Income Tax Benefit (Provision) (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Tax Benefit (Textual) [Abstract]
Statutory tax rate			35.00%
Establishment/reversal of valuation allowance for deferred tax assets	$ (49.2)	$ 18.3		$ 18.3