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Intangible Assets - Summary of Amortization Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
2014 $ 11,730
2015 9,714
2016 7,926
2017 4,023
2018 2,635
Thereafter $ 4,537