Stockholders' Equity (Details) (USD $)	0 Months Ended		1 Months Ended	12 Months Ended
	Aug. 05, 2013	Apr. 12, 2013	May 31, 2013	Dec. 31, 2013 Rate	Dec. 31, 2012	Dec. 31, 2011	May 13, 2013
Class of Stock [Line Items]
Common Stock, Shares, Issued	69,000,000	16,500,000		193,236,454	107,660,080
Proceeds from Issuance of Common Stock	$ 661,100,000	$ 165,100,000		$ 826,233,000	$ 0	$ 18,000
Preferred Stock, Par or Stated Value Per Share				$ 1	$ 1		$ 1.00
Preferred Stock, Redemption Price Per Share							$ 25.00
Preferred Stock, Redemption Amount							74,800,000
Preferred Stock, Redemption Amount, Reduction of Net Loss			$ 2,700,000
Percentage of Restrictions on Ownership of Company Common and Preferred Stock				3.90%
Document Fiscal Year Focus				2013
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Outstanding				3,791,000	3,791,000
Preferred Stock, Dividend Rate, Percentage				7.50%	7.50%
Preferred Stock, Liquidation Preference Per Share				$ 25	$ 25