Income Taxes (Narrative) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Income Tax Disclosure [Abstract] | ||
| Percent of taxable income offset | 80.00% | |
| Cummulative loss incurred, period | 3 years | |
| Valuation allowance | $ 60,919 | $ 140,192 |
| X | ||||||||||
- Definition Cumulative Loss Incurred Period No definition available.
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| X | ||||||||||
- Definition Tax Cuts and Jobs Act of 2017, Percent of Taxable Income Offset No definition available.
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| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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