Earnings Per Share Level 3 (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

A reconciliation of the numerators and denominators of basic and diluted EPS is presented below:

	Years Ended December 31,
	2020		2019		2018
	(In thousands, except per share amounts)
Amounts attributable to common stockholders:
Net income — basic and diluted	515,907		369,596		447,208
Weighted average shares:
Weighted average shares — basic	176,709		182,246		182,447
Stock options	2,234		3,223		4,339
Restricted share units	47		54		186
Weighted average shares — diluted	178,990		185,523		186,972
Amounts attributable to common stockholders:
Net income per share:
Basic	$	2.92	$	2.03	$	2.45
Diluted	$	2.88	$	1.99	$	2.39

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

	Years Ended December 31,
	2020	2019	2018
	(In thousands)
Antidilutive options	1,614	678	1,035