TPG Securities Purchase Agreement (Details) (USD $)	6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 27, 2012	Jun. 30, 2012 Common Stock [Member]	Jun. 05, 2012 Common Stock [Member]	Jun. 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				$ 48,400,000		$ 151,600,000
Transaction Costs on Equity Issuance	13,900,000
Preferred Shares Issued in Lieu of Director Fees		6,666
Dividends, Common Stock, Cash			323,000
Dividends, Preferred Stock, Cash					$ 1,000,000
Common shares issued upon conversion of preferred shares (in shares)	1