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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
Summary Of Significant Accounting Policies [Line Items]      
Allowance for doubtful accounts $ 7,800,000 $ 6,500,000  
Weighted average amortization period of intangible assets, in years 14 years    
Indefinite lived tradenames 379,400,000    
Indefinite in-process lived research and development 53,157,000    
Share based compensation expense 8,623,000 4,532,000 8,521,000
Total income tax benefit recognized for share-based compensation arrangements 2,700,000 2,500,000 2,200,000
Stock issued during period, non-vested shares 178,690 175,291 169,751
Stock Option
      
Summary Of Significant Accounting Policies [Line Items]      
Unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures 3,700,000    
Weighted average period of unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures in years 1 year 10 months 14 days    
Restricted Stock
      
Summary Of Significant Accounting Policies [Line Items]      
Unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures 9,100,000    
Weighted average period of unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures in years 1 year 9 months 2 days    
Chief Executive Officer
      
Summary Of Significant Accounting Policies [Line Items]      
Reduction in share based compensation expense   3,000,000  
Intellectual property | Minimum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 3 years    
Intellectual property | Maximum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 20 years    
Customer Lists | Minimum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 5 years    
Customer Lists | Maximum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 30 years    
Distribution rights | Minimum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 3 years    
Distribution rights | Maximum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 22 years    
Selling, General And Administrative Expenses
      
Summary Of Significant Accounting Policies [Line Items]      
Share based compensation expense $ 8,600,000 $ 4,500,000 $ 8,500,000
Land Improvements
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 5 years    
Building
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 30 years    
Machinery and Equipment | Minimum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 3 years    
Machinery and Equipment | Maximum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 10 years    
Computer Equipment and Software | Minimum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 3 years    
Computer Equipment and Software | Maximum
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of plant and equipment, in years 10 years