Debt Obligations (11.5% Convert Bonds) (Details) (USD $)	12 Months Ended					12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 [FairValueInputsLevel3Member]	Dec. 31, 2011 [FairValueInputsLevel3Member]	Dec. 31, 2012 [IssuanceOfDebtMember] [ElevenPointFivePercentFixedRateDueMarchTwoThousandFourteenMember] [ConvertibleDebtMember]	Mar. 31, 2014 [IssuanceOfDebtMember] [ElevenPointFivePercentFixedRateDueMarchTwoThousandFourteenMember] [ConvertibleDebtMember]	Dec. 31, 2012 [IssuanceOfDebtMember] [ElevenPointFivePercentFixedRateDueMarchTwoThousandFourteenMember] [ConvertibleDebtMember] [FairValueInputsLevel3Member]
Debt Instrument [Line Items]
Debt Instrument Issuance Date 1						Mar. 11, 2011
Proceeds From Issuance Of Debt						$ 40,000,000
Debt Instrument, Interest Rate, Stated Percentage						11.50%	7.50%
Debt Instrument, Convertible, Conversion Price						$ 7.5
Debt Instrument Conversion Denomination						11.5
Embedded Derivative, Fair Value of Embedded Derivative Liability	7,402,000	16,067,000		7,402,000	16,067,000			4,400,000
Unrealized gains (losses)	5,141,000	8,378,000	12,291,000					9,400,000
DebtInstrumentMaturityDateRangeStart1						Jan. 24, 2012
DebtInstrumentMaturityDateRangeEnd1						Jan. 24, 2016
DebtInstrumentConvertibleEarliestDate1						Jan. 24, 2012
DebtInstrumentConvertibleLatestDate1						Jan. 24, 2016
Other income (expense)	$ (9,254,000)	$ 597,000	$ 1,299,000