Net Income Per Share

12 Months Ended

Dec. 31, 2012

Net Income Per Share [Abstract]

Earnings Per Share [Text Block]

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, less shares subject to repurchase. Diluted net income per share is computed by dividing net income for the period by the weighted average number of shares, less shares subject to repurchase, plus, if 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. Since their impact is anti-dilutive, the total number of shares excluded from the calculations of diluted net income per share for the years ended December 31, 2012, 2011 and 2010 were 2,149,044 shares, 1,833,574 shares and 2,005,642 shares, respectively.

The calculation of basic and diluted net income per share is as follows (in thousands, except per share amounts):

	Years Ended December 31
	2012		2011		2010
Basic:
Net income	$	16,178	$	10,389	$	4,892
Weighted average shares outstanding — basic	33,307		33,123		32,651
Net income per share — basic	$	0.49	$	0.31	$	0.15
Diluted:
Net income	$	16,178	$	10,389	$	4,892
Weighted average shares outstanding — basic	33,307		33,123		32,651
Add: Dilutive effect of employee stock plans	906		980		862
Weighted average shares outstanding — diluted	34,213		34,103		33,513
Net income per share — diluted	$	0.47	$	0.30	$	0.15