Stock-based Awards (Tables)

3 Months Ended

Mar. 31, 2015

Stock based Awards

Summary of stock option activity

		Weighted-		Weighted-
		Average		Average
	Number of	Exercise		Remaining
	Options	Price		Contract Life
				(in years)
Outstanding at December 31, 2014	25,589,876	$	9.79	7.55
Granted	430,189		17.66
Exercised	(772,140)		5.04
Canceled/forfeited	(395,016)		12.39
Outstanding at March 31, 2015	24,852,909	$	10.03	7.39

Schedule of activity in connection with restricted stock

		Weighted-
		Average
	Number of	Grant Date
	Shares	Fair Value
Non-vested — December 31, 2014	827,997	$	12.36
Granted	237,901		17.73
Vested	(138,145)		15.70
Canceled/forfeited	(95,991)		10.50
Non-vested — March 31, 2015	831,762	$	13.56

Schedule of stock-based compensation cost relating to stock options and restricted stock awards

	Three Months Ended
	March 31,
	2015		2014
Cost of revenue	$	177	$	54
Sales and marketing		1,390		1,036
Technology and development		926		706
General and administrative		6,960		2,348
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