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Estimated Amortization Expense of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Expected Amortization Expense [Line Items]    
2014 $ 3,370  
2015 2,730  
2016 2,424  
2017 2,298  
2018 2,166  
Thereafter 11,568  
Net Balance $ 24,556 $ 26,593