Financing (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	$ 1,036	$ 45,111	$ (13,262)	$ 15,022
Less: Day-one loss from debenture financings	0	(1,384)	0	(2,565)
Gain (loss) from change in fair value of derivative liability	1,036	43,727	(13,262)	12,457
Series C Preferred Stock [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	918	8,089	(2,284)	244
Gain (loss) from change in fair value of derivative liability			(632)
Series D Preferred Stock [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	44	3,518	(1,302)	1,257
Gain (loss) from change in fair value of derivative liability			(1,295)
Debentures 2006 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	74	11,798	(2,996)	4,785
Debentures 2008 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	0	7,404	(1,350)	3,139
Debentures 2009 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	0	3,065	(486)	1,194
Debentures 2010 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	0	5,877	(34)	1,810
Debentures 2011 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	0	5,360	(4,825)	2,593
Debentures 2012 Series [Member]
Increase (Decrease) in Fair Value of Derivative Instruments, Not Designated as Hedging Instruments	$ 0	$ 0	$ 15	$ 0

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44A, 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 12-16, 44A, 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44A

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details