Net Income Per Share

9 Months Ended

Sep. 30, 2019

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 calculations for the three and nine months ended September 30, 2019 and 2018 were as follows:



	Three months ended September 30,				Nine months ended September 30,
	2019		2018		2019		2018
	(In thousands, except per share data)
Net income	$	19,983	$	13,628	$	39,243	$	22,936
Weighted-average shares outstanding — basic	41,771		39,432		41,283		39,015
Effect of dilutive securities from stock award plans	1,281		1,428		1,513		1,222
Weighted-average shares outstanding — diluted	43,052		40,860		42,796		40,237
Net income per share - basic	$	0.48	$	0.35	$	0.95	$	0.59
Net income per share - diluted	$	0.46	$	0.33	$	0.92	$	0.57

Anti-dilutive weighted-average shares related to stock award plans	1,060		673		832		1,176