Note 2 - Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

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

The calculation of basic and diluted net income per share was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per-share amounts)	2019		2018		2019		2018
Net income—basic and diluted	$	173,438	$	142,797	$	511,125	$	466,232
Average common shares outstanding—basic	203,107		213,309		208,561		214,499
Dilutive effect of share-based compensation arrangements (1)	5,584		4,593		5,402		4,284
Adjusted average common shares outstanding—diluted	208,691		217,902		213,963		218,783
Net income per share:
Basic	$	0.85	$	0.67	$	2.45	$	2.17
Diluted	$	0.83	$	0.66	$	2.39	$	2.13

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(1) The following number of shares of our common stock equivalents issued under our share-based compensation arrangements were not included in the calculation of diluted net income per share because they were anti-dilutive:

	Three Months Ended September 30,		Nine Months Ended September 30,
(In thousands)	2019	2018	2019	2018
Shares of common stock equivalents	—	338	160	338