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Earnings per Common Share (Tables)
 3 Months Ended
Mar. 31, 2012
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share for the three months ended March 31, 2012 and 2011:
 
 
 
Three Months Ended
 
 
March 31,
 
 
2012
 
2011
 
 
(in thousands except per share)
Basic EPS:
 
 
 
 
Net income
 
$
8,902

 
$
5,779

Less: Earnings allocated to participating securities
 
(132)

 
(53)

Earnings allocated to common shareholders
 
$
8,770

 
$
5,726

Weighted average common shares outstanding
 
39,195

 
39,043

Basic earnings per common share
 
$
0.22

 
$
0.15

Diluted EPS:
 
 
 
 
Earnings allocated to common shareholders
 
$
8,770

 
$
5,726

Weighted average common shares outstanding
 
39,195

 
39,043

Dilutive effect of equity awards and warrants
 
103

 
113

Weighted average diluted common shares outstanding
 
39,298

 
39,156

Diluted earnings per common share
 
$
0.22

 
$
0.15

Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive
 
46

 
54