Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Operations (Parenthetical)

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Condensed Consolidated Statements of Operations (Parenthetical) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Cost of revenue $ 37,340 [1] $ 31,848 [1] $ 72,704 [1] $ 62,461 [1]
Product development 11,727 [1] 11,738 [1] 23,765 [1] 23,051 [1]
Sales and marketing 23,924 [1] 18,588 [1] 46,826 [1] 35,394 [1]
General and administrative 12,819 [1] 19,946 [1] 29,326 [1] 32,249 [1]
Stock-based compensation expenses
        
Cost of revenue 676 750 1,426 1,439
Product development 721 1,002 1,852 2,064
Sales and marketing 2,004 1,032 5,205 1,769
General and administrative $ 2,660 $ 1,532 $ 4,823 $ 3,032
[1] (1) Includes stock-based compensation expense as follows: Cost of revenue $ 676 $ 750 $ 1,426 $ 1,439 Product development 721 1,002 1,852 2,064 Sales and marketing 2,004 1,032 5,205 1,769 General and administrative 2,660 1,532 4,823 3,032