Stock-based Awards (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Stock-based Compensation Cost
Total stock-based compensation expense	$ 9,453	$ 4,144
Amount capitalized to internal software use	331	294
Total stock-based compensation cost	9,784	4,438
Cost of revenue
Stock-based Compensation Cost
Total stock-based compensation expense	177	54
Sales and marketing
Stock-based Compensation Cost
Total stock-based compensation expense	1,390	1,036
Technology and development
Stock-based Compensation Cost
Total stock-based compensation expense	926	706
General and administrative
Stock-based Compensation Cost
Total stock-based compensation expense	$ 6,960	$ 2,348

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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