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Net Income Per Share: (Tables)
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted.
 
 
Three months ended June 30,
 
Six months ended June 30,
 
2014
 
2013
 
2014
 
2013
Net income
$
5,878

 
$
7,367

 
$
12,535

 
$
16,052

Weighted average number of common shares outstanding (for basic calculation)
15,242

 
14,617

 
15,170

 
14,562

Dilutive securities
120

 
599

 
269

 
585

Weighted average common and common equivalent shares outstanding (for diluted calculation)
15,362

 
15,216

 
15,439

 
15,147

EPS — basic
$
0.39

 
$
0.50

 
$
0.83

 
$
1.10

EPS — diluted
$
0.38

 
$
0.48

 
$
0.81

 
$
1.06