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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share, Basic and Diluted
The computation of earnings per share is as follows:
 
Year Ended December 31,
 
2014
 
2013
 
2012
 
(dollars in thousands, except per share data)
Net income (loss)
$
182,780

 
$
17,840

 
$
(23,957
)
Net income (loss) attributable to redeemable non-controlling interests in consolidated subsidiaries and funds
15,564

 
13,193

 
(72
)
Net income (loss) attributable to Cowen Group, Inc. stockholders
$
167,216

 
$
4,647

 
(23,885
)
 
 
 
 
 
 
Shares for basic and diluted calculations:
 
 
 
 
 
Weighted average shares used in basic computation
114,926

 
116,703

 
114,400

Warrants

 

 

Stock options

 

 

Stock appreciation rights
60

 
306

 

Restricted stock
4,500

 
4,108

 

Weighted average shares used in diluted computation
119,486

 
121,117

 
114,400

Earnings (loss) per share:
 
 
 
 
 
Basic
$
1.45

 
$
0.04

 
$
(0.21
)
Diluted
$
1.40

 
$
0.04

 
$
(0.21
)