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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]      
Contingent consideration payments $ 16,958,000 $ 17,596,000 $ 5,947,000
Allowance for doubtful accounts 10,700,000 7,800,000  
Reserve for returns and allowances 3,300,000 2,900,000  
Weighted average amortization period of intangible assets, in years 16 years    
Stock-based compensation 11,871,000 8,623,000 4,532,000
Total income tax benefit recognized for share-based compensation arrangements 3,800,000 2,700,000 2,500,000
Stock issued during period, non-vested shares 148,191 178,690 175,291
Asset Impairment Charges     2,497,000
Receivables outstanding, noncurrent 17,600,000    
Reserve for estimated rebates 7,800,000 19,500,000  
In-process Research and Development Asset
      
Summary Of Significant Accounting Policies [Line Items]      
Asset Impairment Charges 7,400,000    
Stock Option
      
Summary Of Significant Accounting Policies [Line Items]      
Unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures 4,400,000    
Weighted average period of unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures in years 1 year 11 months 1 day    
Restricted Stock
      
Summary Of Significant Accounting Policies [Line Items]      
Unamortized share based compensation cost related to non-vested stock option, net of expected forfeitures 9,200,000    
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 22 days    
Chief Executive Officer
      
Summary Of Significant Accounting Policies [Line Items]      
Reduction in share based compensation expense     3,000,000
Minimum | Intellectual property
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 3 years    
Minimum | Customer Lists
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 5 years    
Minimum | Distribution rights
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 3 years    
Minimum | Trade Names
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 1 year    
Maximum | Intellectual property
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 20 years    
Maximum | Customer Lists
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 30 years    
Maximum | Distribution rights
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 22 years    
Maximum | Trade Names
      
Summary Of Significant Accounting Policies [Line Items]      
Useful life of Intangible assets, in years 30 years    
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    
Reclassifications
      
Summary Of Significant Accounting Policies [Line Items]      
Contingent consideration payments   $ 17,600,000 $ 5,900,000