Financing (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Fair value adjustments:
Compound embedded derivatives	$ 23,447	$ (299)
Warrant derivatives	437	3,122
Hybrid instruments	218,656	6,774
Hybrid Instrument [Member]
Fair value adjustments:
Hybrid instruments	219,100
Fair Value, Inputs, Level 3 [Member]
Statement [Line Items]
Beginning balance, December 31, 2013:	281,741
Fair value adjustments:
Compound embedded derivatives	(23,447)
Warrant derivatives	(437)
Hybrid instruments	(218,656)
Ending balance, March 31, 2014	39,201
Fair Value, Inputs, Level 3 [Member] | Embedded Derivative Financial Instruments [Member]
Statement [Line Items]
Beginning balance, December 31, 2013:	23,606
Fair value adjustments:
Compound embedded derivatives	(23,447)
Warrant derivatives	0
Hybrid instruments	0
Ending balance, March 31, 2014	159
Fair Value, Inputs, Level 3 [Member] | Warrant [Member]
Statement [Line Items]
Beginning balance, December 31, 2013:	684
Fair value adjustments:
Compound embedded derivatives	0
Warrant derivatives	(437)
Hybrid instruments	0
Ending balance, March 31, 2014	247
Fair Value, Inputs, Level 3 [Member] | Hybrid Instrument [Member]
Statement [Line Items]
Beginning balance, December 31, 2013:	257,451
Fair value adjustments:
Compound embedded derivatives	0
Warrant derivatives	0
Hybrid instruments	(218,656)
Ending balance, March 31, 2014	$ 38,795