Note 3 - Net Income (Loss) Per Share (Tables)

9 Months Ended

Sep. 30, 2021

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 is as follows.

Net income per share
	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands, except per-share amounts)	2021		2020		2021		2020
Net income—basic and diluted	$	126,412	$	135,103	$	407,226	$	245,613
Average common shares outstanding—basic	186,741		193,176		191,357		196,120
Dilutive effect of share-based compensation arrangements (1)	1,301		980		1,545		1,127
Adjusted average common shares outstanding—diluted	188,042		194,156		192,902		197,247
Net income per share:
Basic	$	0.68	$	0.70	$	2.13	$	1.25
Diluted	$	0.67	$	0.70	$	2.11	$	1.25

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

	Three Months Ended September 30,		Nine Months Ended September 30,
(In thousands)	2021	2020	2021	2020
Shares of common stock equivalents	—	710	—	1,046