Contingencies (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 DelawareActions	Oct. 08, 2009
Contingencies (Textual) [Abstract]
Preferred stock, shares issued	9,336,905	9,336,905
Percentage of outstanding common stock to be held by parent company after merger	100.00%
Purported class actions filed	4
Additional charge to the estimated costs of resolving the pending litigations	$ 6.7
Amount not covered by insurance	5
Fidelity Settlement [Member]
Loss Contingencies [Line Items]
Fidelity Controlled Shares	6,111,879
Number of Shares Exchanged in Exchange Offer	6,933,526
Remaining Shares Permit To Participate In Settlement	821,647
Settlement Amount	22.5
Other Shareholder Settlement [Member]
Loss Contingencies [Line Items]
Number of Shares Exchanged in Exchange Offer	310,690
Settlement Amount	$ 1.0