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Earnings Per Share Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table shows the computation of basic and diluted EPS for the three month periods ended March 31, 2014 and March 31, 2013, respectively:

 
 
Three Months Ended
March 31,
 
 
2014
 
2013
Numerator:
 
 
 
 
Net income attributable to common stockholders
 
$
11,389

 
$
4,351

 
 
 
 
 
Denominator:
 
 
 
 
Weighted-average shares outstanding
 
17,458,136

 
16,028,516

Effect of dilutive securities
 
85,537

 
86,990

Weighted-average diluted shares
 
17,543,673

 
16,115,506

 
 
 
 
 
Basic earnings per share
 
$
0.65

 
$
0.27

Diluted earnings per share
 
$
0.65

 
$
0.27