Net Income Per Share

Basic net income per share is computed by dividing net income for the period by the weighted-average number of shares outstanding during the period. In periods of net loss, all potential common shares are anti-dilutive, so diluted net loss per share equals the basic net loss per share. In periods of net income, diluted net income per share is computed by dividing net income for the period by the basic weighted-average number of shares plus any dilutive potential common stock outstanding during the period. Potential common stock includes the effect of outstanding dilutive stock options, restricted stock awards and restricted stock units computed using the treasury stock method. Any anti-dilutive weighted-average dilutive shares related to stock award plans are excluded from the computation of the diluted net income per share.

The basic and diluted net income per share calculation for the years ended December 31, 2018, December 31, 2017, and December 31, 2016 was as follows:



	Year Ended December 31,
	2018		2017		2016
	(In thousands, except per share data)
Net income	$	37,729	$	30,518	$	9,756
Weighted-average shares outstanding — basic	39,242		37,483		36,156
Effect of dilutive securities from stock award plans	1,317		1,229		708
Weighted-average shares outstanding — diluted	40,559		38,712		36,864
Net income per share - basic	$	0.96	$	0.81	$	0.27
Net income per share - diluted	$	0.93	$	0.79	$	0.26

Anti-dilutive weighted-average shares related to stock award plans	1,279		501		1,345