Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Examination [Line Items]
Income tax benefit	$ (28)	$ (1,722)
Federal statutory income tax rate	35.00%	35.00%
Deferred tax assets, net	$ 0	$ 0
Valuation allowance	(281,548)	(268,592)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	12,900
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Attributable to Continuing Operations	2,500
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Attributable to Discontinued Operations	10,400
Unrecognized Tax Benefits	368	475	$ 731
Unrecognized tax benefits reductions resulting from lapse of applicable statute of limitations due In next twelve months	100
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	100	$ 100
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Federal net operating loss carryforwards	$ 682,900
Minimum [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2025
Minimum [Member] | State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2017
Maximum [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2035
Maximum [Member] | State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2035