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Segment Reporting and Geographic Information - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Segment Reporting Information    
Goodwill $ 65,679 $ 65,679
Call driven
   
Segment Reporting Information    
Goodwill 63,305 63,305
Archeo
   
Segment Reporting Information    
Goodwill $ 2,374 $ 2,374