Stockholders' Equity (Tables)

6 Months Ended

Jun. 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	318,381	$	164.30	158,456	$	171.44
Options exercised/RSUs vested	(533,451)	$	52.00	(95,607)	$	126.49
Forfeited	(83,489)	$	106.98	(6,790)	$	126.23
Balance as of June 30, 2021	2,263,263	$	103.79	262,261	$	138.23

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	318,381	$	164.30	158,456	$	171.44
Options exercised/RSUs vested	(533,451)	$	52.00	(95,607)	$	126.49
Forfeited	(83,489)	$	106.98	(6,790)	$	126.23
Balance as of June 30, 2021	2,263,263	$	103.79	262,261	$	138.23