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Earnings per Common Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Reconciliation of basic and diluted earnings per common share
The following is a reconciliation of basic and diluted earnings per common share (in thousands, except share and per-share data):
 
For the year ended December 31,
 
2012
 
2011
 
2010
Numerator:
 
 
 
 
 
Net income (loss) attributable to common shareholders
$
8,254

 
$
4,443

 
$
(6,642
)
Less: dividends paid on unvested share-based compensation
(310
)
 
(398
)
 
(9
)
Undistributed earnings attributable to share-based compensation
—

 
—

 
—

Net income (loss) available to common shareholders
$
7,944

 
$
4,045

 
$
(6,651
)
Denominator:
 
 
 
 
 
Weighted-average number of common shares — basic
55,806,543

 
47,921,200

 
28,669,851

Effect of dilutive share-based compensation
148,954

 
45,107

 
—

Weighted-average number of common shares — diluted
55,955,497

 
47,966,307

 
28,669,851

 
 
 
 
 
 
Net income (loss) per share available to common shareholders — basic
$
0.14

 
$
0.08

 
$
(0.23
)
Net income (loss) per share available to common shareholders — diluted
$
0.14

 
$
0.08

 
$
(0.23
)