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Derivative Instruments (Gain Loss on Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		211 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative Instruments	$ (2,655)	$ (3,573)	$ 4,379
Warrants expiring April 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative Instruments	(1,414)	(2,317)
Warrants expiring March 29, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative Instruments	(1,179)	(1,198)
Options to Contractors [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivative Instruments	$ (62)	$ (58)

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- Details

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- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

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