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Income Taxes - Current and Deferred Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Document Fiscal Year Focus	2014
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	34.00%
Current	$ 1,152us-gaap_CurrentIncomeTaxExpenseBenefit	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit	$ 97us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	0us-gaap_DeferredIncomeTaxExpenseBenefit	0us-gaap_DeferredIncomeTaxExpenseBenefit	13,727us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense (benefit)	$ 1,152us-gaap_IncomeTaxExpenseBenefit	$ 0us-gaap_IncomeTaxExpenseBenefit	$ 13,824us-gaap_IncomeTaxExpenseBenefit

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.