Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Reconciliation of the basic to diluted (loss) earnings per share
Net Income	$ 72,987	$ (555,664)
Basic (loss) earnings per share:
(Loss) income available to common stockholders	72,987	(555,664)
(Loss) income available to common stockholders, Average Shares	495,983,174	493,843,304
(Loss) income available to common stockholders, Per Share Amount	$ 0.15	$ (1.13)
Effect of dilutive common stock equivalents, Average Shares	25,000
Diluted (loss) earnings per share:
(Loss) income available to common stockholders	$ 72,987	$ (555,664)
(Loss) income available to common stockholders, Shares	496,008,154	493,843,304
(Loss) income available to common stockholders, Per Share Amount	$ 0.15	$ (1.13)
Earnings Per Share (Textual) [Abstract]
Antidilutive securities excluded from computation of earnings per share	22,899,976	22,642,057