Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Stock Option Plan Activity

The following is a summary of our stock option and restricted stock activity and related information:

	Stock Options			Restricted Stock Awards
	Shares	Weighted-Average Exercise Price		Shares	Weighted-Average Grant Date Fair Value
Balance as of December 31, 2020	2,561,822	$	85.59	206,202	$	106.88
Granted	363,889	$	160.36	165,117	$	170.04
Options exercised/RSUs vested	(564,302)	$	52.55	(95,657)	$	126.48
Forfeited	(121,472)	$	109.27	(9,575)	$	138.81
Balance as of September 30, 2021	2,239,937	$	104.77	266,087	$	137.88

Schedule of Restricted Stock Activity

The following is a summary of our stock option and restricted stock activity and related information:

	Stock Options			Restricted Stock Awards
	Shares	Weighted-Average Exercise Price		Shares	Weighted-Average Grant Date Fair Value
Balance as of December 31, 2020	2,561,822	$	85.59	206,202	$	106.88
Granted	363,889	$	160.36	165,117	$	170.04
Options exercised/RSUs vested	(564,302)	$	52.55	(95,657)	$	126.48
Forfeited	(121,472)	$	109.27	(9,575)	$	138.81
Balance as of September 30, 2021	2,239,937	$	104.77	266,087	$	137.88