Earnings (Loss) per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Basic earnings per share [Abstract]
Weighted average common shares outstanding (in shares)	337,868,000	202,013,000	285,336,000	201,770,000
Net income (loss)	$ 12,375	$ (273,891)	$ (60,555)	$ (293,446)
Basic income (loss) per share (in dollars per share)	$ 0.04	$ (1.36)	$ (0.21)	$ (1.45)
Diluted earnings per share [Abstract]
Weighted-average shares - Basic (in shares)	337,868,000	202,013,000	285,336,000	201,770,000
Common stock equivalents (in shares)	1,473,000	0	0	0
Weighted-average shares - Diluted (in shares)	339,341,000	202,013,000	285,336,000	201,770,000
Net income (loss)	$ 12,375	$ (273,891)	$ (60,555)	$ (293,446)
Diluted loss per share (in dollars per share)	$ 0.04	$ (1.36)	$ (0.21)	$ (1.45)
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from EPS calculation (in shares)		1,100,000	200,000	1,100,000
Participating securities included weighted average number of common shares outstanding	100,000
Common Stock Equivalents [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from EPS calculation (in shares)	126,500,000	55,400,000	100,300,000	55,700,000