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Components of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Schedule of Intangible Assets Disclosure [Line Items]    
Goodwill, Gross $ 5,085 $ 5,085
Goodwill, Accumulated Impairment Loss      
Goodwill, Net 5,085 5,085
Indefinite-Lived Trade Names, Gross 18,364 18,364
Indefinite Lived trade Names, Accumulated Impairment Loss      
Indefinite-Lived Trade Names, Net 18,364 18,364
Intangible Assets, Gross (Including Goodwill) 68,342 68,342
Finite-Lived Intangible Assets, Accumulated Amortization (11,173) (10,500)
Intangible Assets, Net (Including Goodwill) 57,169 57,842
License
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 15,847 15,847
Finite-Lived Intangible Assets, Accumulated Amortization (7,207) (7,096)
Finite-Lived Intangible Assets, Net 8,640 8,751
Trade Names
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 10,056 10,056
Finite-Lived Intangible Assets, Accumulated Amortization (2,020) (1,800)
Finite-Lived Intangible Assets, Net 8,036 8,256
Customer Relationships
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 18,406 18,406
Finite-Lived Intangible Assets, Accumulated Amortization (1,743) (1,409)
Finite-Lived Intangible Assets, Net 16,663 16,997
Patents
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 584 584
Finite-Lived Intangible Assets, Accumulated Amortization (203) (195)
Finite-Lived Intangible Assets, Net $ 381 $ 389