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Goodwill and Intangible Assets, Net - Summary of estimated Future Amortization Expense Related to Intangible Assets with Definite Lives (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]    
2013 (remaining six months) $ 2,871  
2014 4,553  
2015 2,674  
2016 2,177  
2017 2,017  
2018 2,017  
2019 and thereafter 5,513  
Intangible assets with definite lives, net $ 21,822 $ 7,890