Note 2 - Net Income Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Net Income Per Share

Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted-average number of common shares outstanding, while diluted net income per share is computed by dividing net income attributable to common stockholders by the sum of the weighted-average number of common shares outstanding and the weighted-average number of dilutive potential common shares. Dilutive potential common shares relate to our share-based compensation arrangements.

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

	Three Months Ended March 31,
(In thousands, except per-share amounts)	2019		2018
Net income—basic and diluted	$	170,957	$	114,486
Average common shares outstanding—basic	213,537		215,967
Dilutive effect of share-based compensation arrangements (1)	4,806		3,916
Adjusted average common shares outstanding—diluted	218,343		219,883
Net income per share:
Basic	$	0.80	$	0.53
Diluted	$	0.78	$	0.52

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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 March 31,
(In thousands)	2019	2018
Shares of common stock equivalents	169	170