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Components of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Intangible Assets Disclosure [Line Items]      
Goodwill, Gross $ 5,085 $ 2,673  
Goodwill, Accumulated Impairment Loss        
Goodwill, Net 5,085 2,673   
Indefinite-Lived Trade Names, Gross 18,364 19,433  
Indefinite Lived trade Names, Accumulated Impairment Loss        
Indefinite-Lived Trade Names, Net 18,364 19,433  
Intangible Assets, Gross (Including Goodwill) 68,342 55,819  
Intangible Assets, Accumulated Amortization (10,500) (8,882)  
Intangible Assets, Net (Including Goodwill) 57,842 46,937 30,818
License
      
Schedule of Intangible Assets Disclosure [Line Items]      
Finite-Lived Intangible Assets, Gross 15,847 15,847  
Finite-Lived Intangible Assets, Accumulated Amortization (7,096) (6,641)  
Finite-Lived Intangible Assets, Net 8,751 9,206  
Trade Names
      
Schedule of Intangible Assets Disclosure [Line Items]      
Finite-Lived Intangible Assets, Gross 10,056 6,116  
Finite-Lived Intangible Assets, Accumulated Amortization (1,800) (1,400)  
Finite-Lived Intangible Assets, Net 8,256 4,716  
Customer Relationships
      
Schedule of Intangible Assets Disclosure [Line Items]      
Finite-Lived Intangible Assets, Gross 18,406 11,166  
Finite-Lived Intangible Assets, Accumulated Amortization (1,409) (681)  
Finite-Lived Intangible Assets, Net 16,997 10,485  
Patents
      
Schedule of Intangible Assets Disclosure [Line Items]      
Finite-Lived Intangible Assets, Gross 584 584  
Finite-Lived Intangible Assets, Accumulated Amortization (195) (160)  
Finite-Lived Intangible Assets, Net $ 389 $ 424