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STOCK-BASED COMPENSATION (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
plan
Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Number of active plans 1  
Number of shares authorized 3,350,000  
Term of plan 10 years  
Non-cash compensation expense related to equity awards    
Non-cash stock-based compensation expense before income taxes $ 5,627 $ 4,587
Income tax benefit (2,223) (1,812)
Total non-cash compensation expense after income taxes 3,404 2,775
Cost of revenue
   
Non-cash compensation expense related to equity awards    
Non-cash stock-based compensation expense before income taxes 13 6
Selling and marketing expense
   
Non-cash compensation expense related to equity awards    
Non-cash stock-based compensation expense before income taxes 931 750
General and administrative expense
   
Non-cash compensation expense related to equity awards    
Non-cash stock-based compensation expense before income taxes 3,841 3,205
Product development
   
Non-cash compensation expense related to equity awards    
Non-cash stock-based compensation expense before income taxes $ 842 $ 626