Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Share

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

	Three Months Ended
	March 31, 2015		March 31, 2014
	(In thousands, except per share data)
Net income	$	6,318	$	6,194
Weighted-average shares outstanding — basic	36,024		35,225
Add: Dilutive effect of employee stock plans	890		1,080
Weighted-average shares outstanding — diluted	36,914		36,305
Net income per share — basic	$	0.18	$	0.18
Net income per share — diluted	$	0.17	$	0.17
Anti-dilutive weighted-average shares related to stock award plans	484		347