Stock-based Awards (Details 3 - Stock comp by FSLI) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-based Compensation Cost
Stock-based compensation expense	$ 9,908	$ 6,241	$ 22,661	$ 18,033
Amount capitalized to internal software use	443	292	993	760
Total stock-based compensation cost	10,351	6,533	23,654	18,793
Cost of revenue
Stock-based Compensation Cost
Stock-based compensation expense	339	256	775	711
Sales and marketing
Stock-based Compensation Cost
Stock-based compensation expense	3,358	1,655	7,263	4,154
Technology and development
Stock-based Compensation Cost
Stock-based compensation expense	2,598	1,200	5,496	3,025
General and administrative
Stock-based Compensation Cost
Stock-based compensation expense	$ 3,613	$ 3,130	$ 9,127	$ 10,143

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
-Publisher FASB
-Name Accounting Standards Codification
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