Stockholders' Equity (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Apr. 14, 2014	Mar. 11, 2014	Dec. 31, 2013	May 13, 2013	Apr. 12, 2013
Stockholders' Equity Note [Abstract]
Common Stock, Shares, Issued		202,043,854		202,043,854			8,700,000	193,236,454		16,500,000
Proceeds from Issuance of Common Stock	$ 98,500,000		$ 165,100,000	$ 98,519,000	$ 165,100,000
Preferred Stock, Par or Stated Value Per Share		$ 1		$ 1		$ 1.00		$ 1	$ 1.00
Preferred Stock, Redemption Price Per Share						$ 25.00			$ 25.00
Preferred Stock, Redemption Amount						94,800,000			74,800,000
Preferred share original issuance costs		$ (3,530,000)	$ (2,656,000)	$ (3,530,000)	$ (2,656,000)