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Components of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Schedule of Intangible Assets Disclosure [Line Items]    
Goodwill, Gross $ 2,673 $ 2,673
Goodwill, Accumulated Impairment Loss      
Goodwill, Net 2,673 2,673
Indefinite-Lived Trade Names, Gross 19,433 19,433
Indefinite Lived trade Names, Accumulated Impairment Loss      
Indefinite-Lived Trade Names, Net 19,433 19,433
Intangible Assets, Gross (Including Goodwill) 55,819 55,819
Finite-Lived Intangible Assets, Accumulated Amortization (9,682) (8,882)
Intangible Assets, Net (Including Goodwill) 46,137 46,937
License
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 15,847 15,847
Finite-Lived Intangible Assets, Accumulated Amortization (6,868) (6,641)
Finite-Lived Intangible Assets, Net 8,979 9,206
Trade Names
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 6,116 6,116
Finite-Lived Intangible Assets, Accumulated Amortization (1,593) (1,400)
Finite-Lived Intangible Assets, Net 4,523 4,716
Customer Relationships
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 11,166 11,166
Finite-Lived Intangible Assets, Accumulated Amortization (1,043) (681)
Finite-Lived Intangible Assets, Net 10,123 10,485
Patents
    
Schedule of Intangible Assets Disclosure [Line Items]    
Finite-Lived Intangible Assets, Gross 584 584
Finite-Lived Intangible Assets, Accumulated Amortization (178) (160)
Finite-Lived Intangible Assets, Net $ 406 $ 424