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Acquisition and Goodwill (Tables)
 12 Months Ended
Dec. 31, 2015
Business Combinations [Abstract]  
Summary of Goodwill Activity

The following table summarizes the activity of goodwill:

 

Balance at January 1, 2014

    $ —    

Goodwill acquired during the period

      1,676   
  

 

 

  

Balance at December 31, 2014

      1,676   

Goodwill acquired during the period

      —    
  

 

 

  

Balance at December 31, 2015

    $ 1,676