Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012 property	Jun. 18, 2012
Loss Contingencies [Line Items]
Operating lease obligation, total remaining	$ 4.8
Accrued expenses and other current liabilities	2.0
Number of leased properties not utilized	2
Loss Contingency, Potential Litigation Award		$ 10.0