Goodwill and Intangible Assets - Changes in Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Line Items]    
Beginning balance $ 18,883 $ 7,259
Foreign currency translation adjustments (171) 446
Ending balance 18,712 18,883
Bold [Member]
   
Goodwill [Line Items]    
Goodwill related to the acquisition   11,178
Ending balance $ 11,178