Year Ended December 31,

2013

2012

2011

Numerator:

Net income

$

22,898

$

15,756

$

13,301

Denominator:

Weighted average outstanding shares used to compute basic net income per share

37,387

34,871

34,050

Effect of dilutive securities

1,233

1,376

1,110

Weighted average outstanding shares used to compute diluted net income per share

38,620

36,247

35,160

Net income per share - basic

$

0.61

$

0.45

$

0.39

Net income per share - diluted

$

0.59

$

0.43

$

0.38