Note 3 - Net Income Per Share - Level 1

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Net Income Per Share

The calculation of basic and diluted net income per share is as follows.

	Year Ended December 31,
(In thousands, except per-share amounts)	2020		2019		2018
Net income—basic and diluted	$	393,626	$	672,309	$	606,011
Average common shares outstanding—basic	195,443		208,773		214,267
Dilutive effect of stock-based compensation arrangements (1)	1,199		1,567		4,286
Adjusted average common shares outstanding—diluted	196,642		210,340		218,553
Net income per share:
Basic	$	2.01	$	3.22	$	2.83
Diluted	$	2.00	$	3.20	$	2.77

(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:

	Year Ended December 31,
(In thousands)	2020	2019	2018
Shares of common stock equivalents	865	221	337