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Earnings Per Share
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share

Basic net income per share is calculated by dividing net income by the weighted average number of shares of common stock outstanding during the period.  Diluted net income per share assumes the conversion of all potentially dilutive securities and is calculated by dividing net income by the sum of the weighted average number of shares of common stock outstanding plus all potentially dilutive securities.  Dilutive common shares consist primarily of stock options and restricted stock awards.
 
 
Three months ended
 
Nine months ended
 
September 30,
2013
 
September 30,
2012
 
September 30,
2013
 
September 30,
2012
 
(in thousands, except share and per share data)
Numerator:
 
 
 
 
 
 
 
Net income
$
10,522

 
$
6,007

 
$
29,781

 
$
19,871

Denominator:
 

 
 

 
 
 
 
Basic weighted average shares*
36,742,262

 
36,803,235

 
36,752,657

 
36,837,686

Effect of dilutive stock options and restricted stock*
275,299

 
197,892

 
289,118

 
246,009

Diluted weighted average shares*
37,017,561

 
37,001,127

 
37,041,775

 
37,083,695

Earnings per share:
 

 
 

 
 
 
 
Basic*
$
0.29

 
$
0.16

 
$
0.81

 
$
0.54

Diluted*
$
0.28

 
$
0.16

 
$
0.80

 
$
0.54

Anti-dilutive shares:
 

 
 

 
 
 
 
Shares*
24,900

 
746,363

 
177,513

 
746,363

 *Reflects three-for-two stock split effective July 2, 2013