Debt - Notes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Debt Instrument [Roll Forward]
Change in fair value of embedded derivative	$ 3,305	$ (37,453)	$ 3,758	$ (48,351)
Notes
Debt Instrument [Roll Forward]
Embedded derivatives, beginning balance			101,087
Convertible notes, beginning balance			158,064
Discount, beginning balance			(47,239)
Total, beginning balance			211,912
Amortization of debt discount			4,596
Change in fair value of embedded derivative			(3,291)
Debt Conversion, Embedded Derivative, Amount			(47,353)
Debt Conversion, Original Debt, Amount			(70,422)
Debt Conversion, Debt Discount, Amount			19,441
Debt Conversion, Long-term Debt, Amount			(98,334)
Embedded derivatives, ending balance	50,443		50,443
Convertible notes, ending balance	87,642		87,642
Discount, ending balance	(23,202)		(23,202)
Total, ending balance	$ 114,883		$ 114,883