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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Property, Plant and Equipment [Line Items]      
Maximum investment of the company in partnership Less than 5%    
Promissory notes receivable $ 1,211,000 $ 2,706,000  
Advertising costs 1,792,000 2,157,000 1,402,000
Accumulated other comprehensive loss consists of foreign currency translation adjustments, net of tax 28,712,000 16,166,000  
Net unrealized gains on available-for-sale investments, net of tax 468,000 84,000  
Net of gains on long-term intercompany loans, net of tax $ 1,271,000 $ 1,271,000  
Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Product warranty period 2    
Maximum [Member] | Distribution Rights [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 12 years    
Maximum [Member] | Customer Contracts And Relationships [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 12 years    
Maximum [Member] | Completed Technologies And Other Intangible Assets [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 8 years    
Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Product warranty period 6    
Minimum [Member] | Distribution Rights [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 11 years    
Minimum [Member] | Customer Contracts And Relationships [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 8 years    
Minimum [Member] | Completed Technologies And Other Intangible Assets [Member]
      
Property, Plant and Equipment [Line Items]      
Useful Estimated Life, Intangible Assets, Maximum 3 years    
Building [Member]
      
Property, Plant and Equipment [Line Items]      
Useful lives, Maximum 39    
Building Improvements [Member]
      
Property, Plant and Equipment [Line Items]      
Useful lives, Maximum 10    
Computer Hardware and Software [Member]
      
Property, Plant and Equipment [Line Items]      
Useful lives, Maximum 5    
Useful lives, Minimum 2    
Manufacturing test equipment [Member]
      
Property, Plant and Equipment [Line Items]      
Useful lives, Maximum 5    
Useful lives, Minimum 2    
Furniture and Fixtures [Member]
      
Property, Plant and Equipment [Line Items]      
Useful lives, Maximum 5    
Useful lives, Minimum 2