Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense recorded in the condensed consolidated statements of income was as follows (in thousands):

	Three Months Ended
	March 31,
	2020		2019
Platform operations	$	1,462	$	1,056
Sales and marketing		5,314		3,227
Technology and development		8,590		4,936
General and administrative		7,599		6,650
Total	$	22,965	$	15,869

Summary of Stock Option Activity

The following summarizes stock option activity:

	Shares Under Option (in thousands)			Weighted- Average Exercise Price
Outstanding as of December 31, 2019		4,064		$	70.74
Granted		46			269.45
Exercised		(539	)		35.91
Cancelled		(34	)		139.02
Outstanding as of March 31, 2020		3,537		$	77.97
Exercisable as of March 31, 2020		1,624		$	40.82

Summary of Restricted Stock Activity

The following summarizes restricted stock activity:

	Shares (in thousands)			Weighted- Average Grant Date Fair Value
Unvested as of December 31, 2019		457		$	120.65
Granted		19			265.32
Vested		(45	)		115.68
Forfeited		(9	)		202.87
Unvested as of March 31, 2020		422		$	125.81