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Balance Sheet Details - Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Developed product technology $ 22,977 $ 23,253
Intellectual property 1,004 1,004
License agreements 17,431 17,423
Core technology 4,790 4,940
Trademarks and trade names 3,705 3,796
Customer-related 21,568 19,221
Distribution network 3,980 3,906
Physician education programs 2,948 3,039
Supply agreement 225 225
Intangible assets, Gross 82,701 81,088
Less accumulated amortization (36,474) (34,232)
Intangible assets, net 46,227 46,856
Distribution rights [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 3 years  
Distribution rights $ 4,073 $ 4,281
Developed product technology [Member] | Minimum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 3 years  
Developed product technology [Member] | Maximum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 8 years  
Intellectual property [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 5 years  
License agreements [Member] | Minimum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 1 year  
License agreements [Member] | Maximum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 7 years  
Core technology [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 10 years  
Corporate trademarks [Member] | Minimum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 3 years  
Corporate trademarks [Member] | Maximum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 9 years  
Customer-related [Member] | Minimum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 12 years  
Customer-related [Member] | Maximum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 15 years  
Distribution network [Member] | Minimum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 10 years  
Distribution network [Member] | Maximum [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 12 years  
Physician education programs [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 10 years  
Supply agreement [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Estimated useful lives 10 years