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Income Taxes (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
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