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Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
2014 $ 8,441  
2015 6,394  
2016 6,394  
2017 6,394  
2018 5,547  
Thereafter 10,339  
Intangible assets, net $ 43,509 $ 47,207