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Quarterly Financial Information (Unaudited)
12 Months Ended
Dec. 31, 2012
Quarterly Financial Information (Unaudited) [Abstract]  
Quarterly Financial Information (Unaudited) 12. Quarterly Financial Information

12. Quarterly Financial Information (Unaudited)

The following is a summary of the unaudited quarterly financial information for the two years ended December 31, 2012 and 2011 (in thousands, except per share amounts):

 

                                 
    Three Months Ended  

2012

  March 31     June 30     September 30     December 31  

Net sales

  $ 280,466     $ 264,730     $ 269,152     $ 258,000  

Gross profit

    24,461       19,391       24,136       22,339  

Net income (loss)

    6,694       2,370       5,527       5,220  

Net income (loss) per common share – basic

    0.29       0.11       0.27       0.25  

Net income (loss) per common share – diluted

    0.29       0.11       0.27       0.25  

 

                                 
    Three Months Ended  

2011

  March 31     June 30     September 30     December 31  

Net sales

  $ 303,351     $ 309,469     $ 319,356     $ 248,297  

Gross profit

    33,755       30,632       37,839       38,627  

Net income (loss)

    10,654       9,461       13,721       16,295  

Net income (loss) per common share – basic

    0.46       0.41       0.59       0.70  

Net income (loss) per common share – diluted

    0.46       0.40       0.59       0.69