Earnings (Loss) per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic earnings per share [Abstract]
Weighted average common shares outstanding (in shares)	338,213,000	232,348,000
Net income (loss)	$ 59,982	$ (72,930)
Basic income (loss) per share (in dollars per share)	$ 0.18	$ (0.31)
Diluted earnings per share [Abstract]
Net income (loss)	59,982	(72,930)
Effect of dilutive securities [Abstract]
2% Convertible Senior Notes	3,049	0
Net income (loss) plus assumed conversions	$ 63,031	$ (72,930)
Weighted-average shares - Basic (in shares)	338,213,000	232,348,000
Common stock equivalents (in shares)	74,967,000	0
Weighted-average shares - Diluted (in shares)	413,180,000	232,348,000
Diluted income (loss) per share (in dollars per share)	$ 0.15	$ (0.31)
Participating Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from EPS calculation (in shares)		1,200,000
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)	54,500,000	77,300,000