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Basic and Diluted Earnings Per Share (“EPS”) Data (Tables)
 6 Months Ended
Jun. 30, 2016
Earnings Per Share, Basic and Diluted [Abstract]  
Schedule of Calculation of Numerator and Denominator in EPS
The following table reconciles the denominator used to compute basic EPS to the denominator used to compute diluted EPS for the indicated periods:
 
Three months ended
 
Six months ended
 
June 30
 
June 30,
 
2016
 
2015
 
2016
 
2015
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
Net income (loss) attributable to CDI
$
(7,484
)
 
$
(157
)
 
$
(12,301
)
 
$
313

Denominator:
 
 
 
 
 
 
 
Basic weighted-average shares
19,174

 
19,675

 
19,427

 
19,655

Dilutive effect of share-based awards
—

 
—

 
—

 
191

Diluted weighted-average shares
19,174

 
19,675

 
19,427

 
19,846

Earnings per common share:
 
 
 
 
 
 
 
Basic
$
(0.39
)
 
$
(0.01
)
 
$
(0.63
)
 
$
0.02

Diluted
$
(0.39
)
 
$
(0.01
)
 
$
(0.63
)
 
$
0.02