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Intangible assets, net - Summary of Estimated Amortization Expense on Intangible Asset (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Finite Lived Intangible Assets Future Amortization Expense [Abstract]  
2014 $ 1,333
2015 1,182
2016 1,030
2017 879
2018 726
Thereafter $ 1,685