The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Benefit from income taxes	$ 1	$ 260	$ (2)	$ 228
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Federal net operating loss carryforwards					$ 187,400
Refunds claimed on amended tax returns	$ 8,400		$ 8,400