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Earnings Per Share(Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Summary of Per Common Share Data and Amounts
The following table presents a summary of per common share data and amounts for the periods indicated.

 
Years ended December 31,
(in thousands, except per share data)
2012
 
2011
 
2010
Net income as reported
$
28,296

 
$
25,423

 
$
5,573

Preferred stock dividend
(1,488
)
 
(1,750
)
 
(1,750
)
Accretion of preferred stock discount
(1,707
)
 
(774
)
 
(717
)
Net income available to common shareholders
$
25,101

 
$
22,899

 
$
3,106

 
 
 
 
 
 
Impact of assumed conversions
 
 
 
 
 
Interest on 9% convertible trust preferred securities, net of income tax
1,485

 
1,485

 
—

Net income available to common shareholders and assumed conversions
$
26,586

 
$
24,384

 
$
3,106

 
 
 
 
 
 
Weighted average common shares outstanding
17,859

 
16,683

 
14,747

Incremental shares from assumed conversions of convertible trust preferred securities
1,439

 
1,439

 
—

Additional dilutive common stock equivalents
40

 
23

 
—

Weighted average diluted common shares outstanding
19,338

 
18,145

 
14,747

 
 
 
 
 
 
Basic earnings per common share:
$
1.41

 
$
1.37

 
$
0.21

Diluted earnings per common share:
$
1.37

 
$
1.34

 
$
0.21