Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (281,649)	$ 21,941
Weighted average number of common shares outstanding	214,145,000	213,531,000
Weighted average number of common shares and common stock equivalent shares outstanding	214,145,000	217,110,000
Basic income per common share	$ (1.32)	$ 0.10
Diluted income per share	$ (1.32)	$ 0.10
Excluded antidilutive common stock	18,132,804	560,486
Earnings Per Share, Basic [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	(281,649)	21,941
Weighted average number of common shares outstanding	214,145,000	213,531,000
Basic income per common share	$ (1.32)	$ 0.10
Earnings Per Share, Diluted [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (281,649)	$ 21,941
Weighted average number of common shares outstanding	214,145,000	213,531,000
Diluted income per share	$ (1.32)	$ 0.10
Stock Options [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect	0	3,579,000
Restricted Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect	0	0