Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
	(In thousands, except per share amounts)
Amounts attributable to common stockholders:
Net income:
Net income — basic	$	70,792	$	68,935	$	222,444	$	254,162
After tax interest on convertible debt	—		15		—		45
Net income — diluted	$	70,792	$	68,950	$	222,444	$	254,207
Weighted average shares (denominator):
Weighted average shares — basic	182,551		180,858		182,218		182,859
Stock options	3,225		4,284		3,370		4,364
Restricted stock units	67		197		47		173
Convertible debt	—		121		—		121
Weighted average shares — diluted	185,843		185,460		185,635		187,517
Net income per share:
Basic	$	0.39	$	0.38	$	1.22	$	1.39
Diluted	$	0.38	$	0.37	$	1.20	$	1.36

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2019	2018	2019	2018
	(In thousands)
Antidilutive options	785	831	641	980
Antidilutive restricted stock units	—	—	58	—