TPG Securities Purchase Agreement (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Common Stock [Member]	Jun. 05, 2012 Common Stock [Member]	Sep. 30, 2012 Series E Preferred Stock [Member]	Jun. 05, 2012 Series E Preferred Stock [Member]
Class of Stock [Line Items]
Number of shares agreed to be sold in agreement (in shares)			4,300,000		13,500,000
Fair value of investment in company shares			$ 48.4		$ 151.6
Transaction Costs on Equity Issuance	13.9
Shares Issued in Lieu of Director Fees		6,198		6,666
Dividends, Common Stock, Cash	2.3
Dividends, Preferred Stock, Cash	$ 1
Common shares issued upon conversion of preferred shares (in shares)	1