Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Share

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

	Year Ended
	December 31, 2014		December 31, 2013		December 31, 2012
	(In thousands, except per share data)
Net income	$	30,518	$	23,979	$	16,178
Weighted-average shares outstanding — basic	35,650		34,736		33,307
Add: Dilutive effect of employee stock plans	972		1,041		906
Weighted-average shares outstanding — diluted	36,622		35,777		34,213
Net income per share — basic	$	0.86	$	0.69	$	0.49
Net income per share — diluted	$	0.83	$	0.67	$	0.47
Anti-dilutive weighted-average shares related to stock award plans	640		850		2,149