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Income Taxes Components of Deferred Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Components of Deferred Tax Assets |  |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | $ 310 | $ 1,000
Deferred Tax Assets, Inventory | 1,900 | 5,230
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other | 7,220 | 20,350
Deferred Tax Assets, Operating Loss and Credit Carryforwards | 6,990 | 7,290
Deferred Tax Assets, Gross | 16,420 | 33,870
Deferred Tax Assets, Valuation Allowance | (5,520) | (6,400)
Deferred Tax Assets, Net of Valuation Allowance | 10,900 | 27,470
Components of Deferred Tax Liabilities |  |
Deferred Tax Liabilities, Property, Plant and Equipment | (8,770) | (16,380)
Deferred Tax Liabilities, Goodwill and Intangible Assets | (4,940) | (5,350)
Deferred Tax Liabilities, Investment in Foreign Affiliates, Including Withholding Tax | (1,050) | (740)
Deferred Tax Liabilities, Other | (620) | (1,550)
Deferred Tax Liabilities, Gross | (15,380) | (24,020)
Deferred Tax Liabilities, Net | $ (4,480) |
Deferred Tax Assets, Net |  | $ 3,450

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