Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Activity Related to Stock Options Awards and Restricted Stock Awards

Stock option award and restricted stock award activity during the three months ended March 31, 2022 and 2021 was as follows: 

	Shares Subject to Stock Option Awards
	Three Months Ended March 31,
	2022							2021
	Avg wtd		Avg wtd					Avg wtd		Avg wtd
	grant-date		exercise					grant-date		exercise
	fair value		price		Units			fair value		price		Units
Outstanding at beginning of period	$	3.94	$	6.71		5,315,210		$	3.91	$	6.50		6,865,101
Forfeited		6.39		14.00		(206	)		5.12		10.19		(69,989	)
Exercised		3.72		5.55		(222,057	)		4.28		7.23		(109,237	)
Outstanding at end of period	$	3.95	$	6.76		5,092,947		$	3.89	$	6.45		6,685,875
Vested	$	3.91	$	6.63		4,888,331		$	3.81	$	6.20		6,254,734
Unvested		5.05		9.92		204,616			5.11		10.07		431,141

	Restricted Stock Awards
	Three Months Ended March 31,
	2022					2021
	Avg wtd grant-					Avg wtd grant-
	date fair value		Units			date fair value		Units
Unvested at beginning of period	$	17.75		1,352,839		$	14.99		2,827,008
Granted		32.19		514,223			26.49		231,568
Vested		17.07		(480,645	)		14.61		(952,696	)
Forfeited		24.99		(438	)		15.24		(47,301	)
Unvested at end of period	$	23.34		1,385,979		$	16.45		2,058,579