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Income Taxes - Deferred tax liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Net operating losses and credits $ 55,939 $ 63,052    
Depreciation 4,776 7,495    
Operating lease 19,849      
Amortization 3,738 3,633    
Stock-based compensation 9,790 9,984    
Deferred compensation 20,077 22,058    
Unrealized foreign currency gain/loss 7,955 5,881    
Deferred revenue 9,696 4,654    
Revaluation of equity investments and licenses 3,424 3,148    
Inventory 4,824 4,588    
Accrued liabilities and reserves 7,215 7,213    
Other 3,839 4,073    
Total deferred tax assets 151,122 135,779    
Valuation allowance (51,221) (53,893) $ (62,098) $ (61,225)
Deferred tax assets, net of valuation allowance 99,901 81,886    
Capitalized software (21,025) (19,491)    
Operating lease (19,553)      
Indefinite-lived intangibles (14,363) (13,753)    
Deferred tax liability on foreign earnings (18,027) (20,443)    
Total deferred tax liabilities (72,968) (53,687)    
Net deferred tax assets $ 26,933 $ 28,199