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Earnings per Common Share
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Earnings per Common Share
Earnings per Common Share
We present basic and diluted earnings per share. Basic earnings per share is calculated by dividing the net income attributable to the owners of QIAGEN N.V. by the weighted average number of common shares outstanding. Diluted earnings per share reflect the potential dilution that would occur if all “in the money” options and warrants to issue common shares were exercised. The following schedule summarizes the information used to compute earnings per common share:
 
Years ended December 31,
(in thousands, except per share data)
2016
 
2015
 
2014
Net income attributable to the owners of QIAGEN N.V.
$
80,404

 
$
130,148

 
$
116,365

 
 
 
 
 
 
Weighted average number of common shares used to compute basic net income per common share
234,800

 
233,483

 
232,644

Dilutive effect of stock options and restrictive stock units
4,193

 
5,028

 
4,841

Dilutive effect of outstanding warrants
—

 
136

 
5,321

Weighted average number of common shares used to compute diluted net income per common share
238,993

 
238,647

 
242,806

Outstanding options and awards having no dilutive effect, not included in above calculation
210

 
37

 
422

Outstanding warrants having no dilutive effect, not included in above calculation
25,800

 
26,071

 
32,505

 
 
 
 
 
 
Basic earnings per common share attributable to the owners of QIAGEN N.V.
$
0.34

 
$
0.56

 
$
0.50

Diluted earnings per common share attributable to the owners of QIAGEN N.V.
$
0.34

 
$
0.55

 
$
0.48