Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

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

Stock option award and restricted stock award activity during the six months ended June 30, 2020 and 2019 was as follows:

	Shares Subject to Stock Option Awards
	Six Months Ended June 30,
	2020							2019
	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	$	3.83	$	6.27		7,880,167		$	3.79	$	6.12		9,070,052
Forfeited		6.34		13.86		1,272			6.51		14.26		(36,774	)
Exercised		3.74		5.89		(287,621	)		3.23		4.30		(222,084	)
Outstanding at end of the period	$	3.84	$	6.28		7,593,818		$	3.79	$	6.13		8,811,194
Vested	$	3.67	$	5.78		6,758,066		$	3.41	$	4.98		6,691,308
Unvested		5.20		10.35		835,752			5.00		9.79		2,119,886

	Restricted Stock Awards
	Six Months Ended June 30,
	2020					2019
	Avg wtd grant-					Avg wtd grant-
	date fair value		Units			date fair value		Units
Unvested at beginning of period	$	14.29		3,215,619		$	13.17		2,997,856
Granted		16.18		297,833			16.02		995,669
Vested		14.66		(892,921	)		13.41		(43,996	)
Forfeited		17.29		(18,277	)		14.02		(367,998	)
Unvested at end of period	$	14.45		2,602,254		$	13.87		3,581,531