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Intangible assets, net (Tables)
12 Months Ended
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Estimated Amortization Expense on Intangible Assets

The estimated amortization expense on intangible assets in years subsequent to December 31, 2014, is as follows:

 

2015

$ 1,182   

2016

  1,030   

2017

  879   

2018

  726   

2019

  574   

Thereafter

$ 1,110