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Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data (Unaudited)
Quarterly Financial Data (Unaudited)

The table below summarizes the unaudited quarterly results of operations for the past two years (in thousands, except per share data):

  
Quarter
  
2013
 
2012
  
First
 
Second
 
Third
 
Fourth
 
First
 
Second
 
Third
 
Fourth
Net sales
$
370,362

 
$
790,392

 
$
578,157

 
$
340,789

 
$
361,954

 
$
757,175

 
$
528,027

 
$
306,818

Gross profit
104,761

 
228,166

 
162,557

 
95,793

 
104,563

 
222,405

 
151,501

 
88,938

Net income (loss)
3,440

 
66,533

 
32,332

 
(4,975
)
 
3,651

 
64,943

 
21,375

 
(7,997
)
Earnings (loss) per share:
 
 
 
 
 
 
 
 
 

 
 

 
 

 
 

Basic
$
0.07

 
$
1.43

 
$
0.70

 
$
(0.11
)
 
$
0.08

 
$
1.38

 
$
0.46

 
$
(0.17
)
Diluted
$
0.07

 
$
1.39

 
$
0.68

 
$
(0.11
)
 
$
0.08

 
$
1.34

 
$
0.45

 
$
(0.17
)


The sum of basic and diluted earnings per share for each of the quarters may not equal the total basic and diluted earnings per share for the annual periods because of rounding differences and a difference in the way that in-the-money stock options are considered from quarter to quarter. 

The above amounts include the $6.9 million goodwill impairment charge recorded in the third quarter of 2012.