Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

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, 2018	1,736,304	$	66.71	132,273	$	130.63
Granted	319,334	$	117.07	101,404	$	113.48
Options exercised/RSUs vested	(111,010)	$	23.67	(70,166)	$	110.99
Forfeited	(5,000)	$	136.72	(666)	$	134.36
Balance as of September 30, 2019	1,939,628	$	77.24	162,845	$	128.40

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, 2018	1,736,304	$	66.71	132,273	$	130.63
Granted	319,334	$	117.07	101,404	$	113.48
Options exercised/RSUs vested	(111,010)	$	23.67	(70,166)	$	110.99
Forfeited	(5,000)	$	136.72	(666)	$	134.36
Balance as of September 30, 2019	1,939,628	$	77.24	162,845	$	128.40