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Income Taxes (Schedule of Noncurrent Deferred Taxes and Other Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Deferred income taxes | $ 7,547 | $ 9,573
Other liabilities | 875 | 1,418
Total noncurrent deferred taxes and other liabilities | $ 8,422 | $ 10,991

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