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Income Taxes (Details 2) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Components of Deferred Tax Assets and Liabilities [Line Items] |  |
Net operating loss carryforwards and credits deferred tax assets | $ 75,630 | $ 76,027
Depreciation deferred tax assets | 5,952 | 8,310
Stock-based compensation deferred tax assets | 9,815 | 19,609
Deferred compensation deferred tax assets | 21,434 | 24,813
Revaluation of equity method investments and licenses deferred tax assets | 3,465 | 4,707
Inventory deferred tax assets | 4,864 | 5,235
Accrued liabilities and reserves deferred tax assets | 8,230 | 8,814
Other deferred tax assets | 11,873 | 15,948
Total deferred tax assets | 141,263 | 163,463
Valuation allowance | (62,098) | (61,225)
Deferred tax assets, net of valuation allowance | 79,165 | 102,238
Capitalized software deferred tax liabilities | (19,630) | (15,323)
Amortization deferred tax liabilities | (3,394) | (5,115)
Indefinite-lived intangibles deferred tax liabilities | (13,254) | (19,680)
Deferred tax liability on foreign earnings | (21,000) |
Total deferred tax liabilities | (57,278) | (40,118)
Net deferred tax assets | 21,887 | $ 62,120
Foreign net operating losses and credits [Member] |  |
Components of Deferred Tax Assets and Liabilities [Line Items] |  |
Valuation allowance | (59,000) |
Deferred tax assets, net of valuation allowance | $ 17,000 |

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