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Income Taxes, Components of Deferred Taxes, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Income Taxes [Abstract] |  |
Net noncurrent deferred tax assets | $ 33,785 | $ 35,752
Net noncurrent deferred tax liabilities | 36,718 | 643
Deferred taxes, net |  | $ 35,109
Deferred taxes, net | $ (2,933) |

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