Fair Value Measurement (Schedule Of Assets Or Liabilities Measured On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	$ 16,252	$ 16,902	$ 15,935	$ 0
Net unrealized gains included in other income (loss)	(2,137)	(867)	(1,820)	346
Purchases, sales, issuances and settlements, net	0	0	0	15,689
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	14,115	16,035	14,115	16,035
Changes in Realized Gains (Losses) Included in Income on Instruments Held at end of period	0	0	0	0
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at end of period	(2,137)	(867)	(1,820)	346
Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	7,416	8,009	7,205	0
Net unrealized gains included in other income (loss)	(828)	(308)	(617)	626
Purchases, sales, issuances and settlements, net	0	0	0	7,075
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	6,588	7,701	6,588	7,701
Changes in Realized Gains (Losses) Included in Income on Instruments Held at end of period	0	0	0	0
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at end of period	(828)	(308)	(617)	626
Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	8,836	8,893	8,730	0
Net unrealized gains included in other income (loss)	(1,309)	(559)	(1,203)	(280)
Purchases, sales, issuances and settlements, net	0	0	0	8,614
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	7,527	8,334	7,527	8,334
Changes in Realized Gains (Losses) Included in Income on Instruments Held at end of period	0	0	0	0
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at end of period	$ (1,309)	$ (559)	$ (1,203)	$ (280)

Fair value liabilities measured on recurring basis change in realized gain loss included in other income

No definition available.

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- Definition

This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. Such unrealized (holding) gains or losses relate to those liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph d

-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

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- Definition

Transfers into liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

+ References

+ Details

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- Definition

Transfers out of liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

+ References

+ Details

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- Definition

Amount of gain (loss) recognized in earnings, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(1)

-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

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- Definition

Amount of purchases, sales, issues, and settlements in relation to liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(2)

-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

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- Definition

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

+ Details

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