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Goodwill and Intangible Assets - Intangible Assets by Major Asset Class (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Intangible Assets by Major Class [Line Items]    
Gross $ 265,725 $ 265,725
Accumulated amortization 41,033 39,967
Net book value 224,692 225,758
Trade name, trademark and trade dress and other    
Intangible Assets by Major Class [Line Items]    
Gross 218,364 218,364
Net book value 218,364 218,364
Patents    
Intangible Assets by Major Class [Line Items]    
Gross 31,581 31,581
Accumulated amortization 31,543 31,491
Net book value $ 38 90
Patents | Minimum    
Intangible Assets by Major Class [Line Items]    
Useful Life (years) 2 years  
Patents | Maximum    
Intangible Assets by Major Class [Line Items]    
Useful Life (years) 16 years  
Developed technology and other    
Intangible Assets by Major Class [Line Items]    
Gross $ 15,780 15,780
Accumulated amortization 9,490 8,476
Net book value $ 6,290 $ 7,304
Developed technology and other | Minimum    
Intangible Assets by Major Class [Line Items]    
Useful Life (years) 1 year  
Developed technology and other | Maximum    
Intangible Assets by Major Class [Line Items]    
Useful Life (years) 9 years