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Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2011
Quarterly Financial Data (Unaudited) [Abstract]  
Quarterly Financial Data (Unaudited)
Note 13 - 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
 
  
2011
 
2010
 
  
 
First
   
Second
   
Third
   
Fourth
   
First
   
Second
   
Third
   
Fourth
 
Net sales
$
312,889
 
$
706,423
 
$
503,584
 
$
270,422
 
$
269,833
 
$
647,467
 
$
455,020
 
$
241,426
 
Gross profit
 
91,410
   
211,439
   
147,906
   
80,835
   
76,292
   
190,534
   
130,869
   
73,567
 
Net income (loss)
 
(638
)
 
58,577
   
24,169
   
(10,115
)
 
(6,111
) 
 
52,770
   
22,784
   
(11,805
)
Earnings (loss) per share:
                                               
 
Basic
$
(0.01
)
$
1.21
 
$
0.50
 
$
(0.21
)
$
(0.12
)
$
1.07
 
$
0.46
 
$
(0.24
)
 
Diluted
$
(0.01
)
$
1.19
 
$
0.50
 
$
(0.21
)
$
(0.12
)
$
1.05
 
$
0.45
 
$
(0.24
)

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.