Note 3 - Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 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 is as follows:

	Year Ended December 31,
	2019		2018		2017
(In thousands, except per-share amounts)
Net income—basic	$	672,309	$	606,011	$	121,088
Adjustment for dilutive Convertible Senior Notes due 2019, net of tax	—		—		(215		)
Net income —diluted	$	672,309	$	606,011	$	120,873
Average common shares outstanding—basic	208,773		214,267		215,321
Dilutive effect of Convertible Senior Notes due 2017 and 2019	—		—		780
Dilutive effect of stock-based compensation arrangements (1)	1,567		4,286		4,305
Adjusted average common shares outstanding—diluted	210,340		218,553		220,406
Net income per share:
Basic	$	3.22	$	2.83	$	0.56
Diluted	$	3.20	$	2.77	$	0.55

______________________

(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)	2019	2018	2017
Shares of common stock equivalents	221	337	353