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Product Acquisitions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2008
Dec. 31, 2012
Cost of Sales
Dec. 31, 2011
Cost of Sales
Dec. 31, 2012
Costs and Expenses
Dec. 31, 2011
Costs and Expenses
Dec. 07, 2010
Mocap
Country
Dec. 07, 2010
Nemacur
Country
Dec. 31, 2012
Product Rights
Dec. 31, 2012
Customer Lists
Dec. 31, 2012
Trademarks
Business Acquisition [Line Items]                          
Number of registered countries                 50 30      
Intangible assets acquired $ 3,473 $ 316 $ 32,677                    
Payment made toward Intangible Assets acquired during period 2,400   20,655                    
Acquisition cost associated with the product acquisition 7,447   401 400                  
Purchased product line   6,802                      
Expected useful life                     25 years 10 years 25 years
Fair value reduction 189 2,857     0 495 189 2,362          
Total product acquisition obligation 11,900                        
Product acquisition obligation, Other Liability 5,746                        
Product acquisition obligation, Debt $ 6,154