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Income Taxes (Refund Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended
	Apr. 09, 2012	Mar. 31, 2012	Apr. 09, 2012 2009-10 And 2010-11 [Member]	Jun. 30, 2012 Forecast [Member] 2009-10 And 2010-11 [Member]
Operating Loss Carryforwards [Line Items]
Refund orders received	$ 9.19		$ 2.26
Interest earned on refund orders	2.61		0.18
Interest on unrecognized tax benefits	1.5
Interest income recognized		1.12		0.18
Principal amount of the advance tax paid	$ 6.58

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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