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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Contractor
Dec. 31, 2012
Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]      
Maximum maturities period of debt securities 10 years    
Maximum investment of the company in partnership Less than 5%    
Promissory notes receivable $ 1,372,000 $ 1,211,000  
Advertising costs 1,656,000 1,792,000 2,157,000
Accumulated other comprehensive loss consists of foreign currency translation adjustments, net of tax 28,630,000 28,712,000  
Net unrealized gain (loss) on available-for-sale investments, net of tax (36,000) 468,000  
Net unrealized gain on derivative instruments, net of tax 104,000 0  
Net of gains on long-term intercompany loans, net of tax 1,271,000 1,271,000  
Reclassification from accumulated other comprehensive income to investment income $ 314,000 $ 1,695,000 $ (181,000)
Number of manufacture contractor 2    
Maximum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty period 2 years    
Maximum [Member] | Distribution Networks [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 12 years    
Maximum [Member] | Customer Contracts and Relationships [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 12 years    
Maximum [Member] | Completed Technologies and Other Intangible Assets [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 8 years    
Minimum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty period 6 months    
Minimum [Member] | Distribution Networks [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 11 years    
Minimum [Member] | Customer Contracts and Relationships [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 8 years    
Minimum [Member] | Completed Technologies and Other Intangible Assets [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful estimated life, intangible assets 3 years    
Japan [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Expiration term of promissory notes 180 days    
Buildings [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 39 years    
Building Improvements [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 10 years    
Computer Hardware and Software [Member] | Maximum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 5 years    
Computer Hardware and Software [Member] | Minimum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 2 years    
Manufacturing Test Equipment [Member] | Maximum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 5 years    
Manufacturing Test Equipment [Member] | Minimum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 2 years    
Furniture and Fixtures [Member] | Maximum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 5 years    
Furniture and Fixtures [Member] | Minimum [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives 2 years