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Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Deferred Tax Assets [Abstract] |  |
Inventory differences | $ 2,861 | $ 2,521
Foreign tax credit and other foreign benefits | 52,408 | 145,169
Stock-based compensation | 6,327 | 11,470
Accrued expenses not deductible until paid | 39,326 | 32,796
Foreign currency exchange | 2,001 | 4,826
Net operating losses | 5,230 | 9,584
Capitalized research and development | 197 | 358
Other | 211 | 1,063
Gross deferred tax assets | 108,561 | 207,787
Deferred Tax Liabilities [Abstract] |  |
Foreign currency exchange | 874 | 105
Foreign withholding taxes | 29,018 | 0
Intangibles step-up | 6,568 | 12,107
Overhead allocation to inventory | 3,977 | 4,820
Amortization of intangibles | 11,475 | 19,091
Foreign outside basis in controlled foreign corporation | 0 | 106,846
Other | 2,676 | 20,572
Gross deferred tax liabilities | 54,588 | 163,541
Valuation allowance | (56,906) | (9,137)
Deferred taxes, net |  | $ 35,109
Deferred taxes, net | (2,933) |
Foreign [Member] |  |
Operating Loss Carryforwards [Abstract] |  |
Operating loss carryforwards | 17,100 |
Operating loss carryforwards scheduled to expire | 5,700 |
Operating loss carryforwards that will not expire | 11,400 |
Valuation allowance on operating loss carryforwards | 15,900 |
Tax Credit Carryforwards [Abstract] |  |
Tax credit carryforward | $ 52,000 |
Foreign [Member] | Minimum [Member] |  |
Operating Loss Carryforwards [Abstract] |  |
Expiration date | Dec. 31, 2018 |
Tax Credit Carryforwards [Abstract] |  |
Expiration date | Dec. 31, 2026 |
Foreign [Member] | Maximum [Member] |  |
Operating Loss Carryforwards [Abstract] |  |
Expiration date | Dec. 31, 2027 |
Tax Credit Carryforwards [Abstract] |  |
Expiration date | Dec. 31, 2027 |

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