Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three Months Ended
	March 31,
	2019		2018
	(In thousands, except per share amounts)
Amounts attributable to common stockholders:
Net income:
Net income — basic	$	79,323	$	81,988
After tax interest on convertible debt	—		15
Net income — diluted	$	79,323	$	82,003
Weighted average shares (denominator):
Weighted average shares — basic	181,696		185,130
Stock options	3,562		4,522
Restricted stock units	59		150
Convertible debt	—		121
Weighted average shares — diluted	185,317		189,923
Net income per share:
Basic	$	0.44	$	0.44
Diluted	$	0.43	$	0.43

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

	Three Months Ended
	March 31,
	2019	2018
	(In thousands)
Antidilutive options	—	577
Antidilutive restricted stock units	37	—