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Investments (Tables)
 6 Months Ended
Jul. 31, 2013
Investments And Deposits [Abstract]  
Equity Method Investments [Table Text Block] The following table summarizes equity method investments at July 31, 2013 and January 31, 2013 (amounts in thousands):

Entity     Ownership Percentage       Carrying Amount
July 31, 2013 		      Carrying Amount
January 31, 2013 		 
                         
Big River     10 %   $ 34,973     $ 32,438  
Patriot     27 %     30,942       27,521  
Total Equity Method Investments           $ 65,915     $ 59,959  
Schedule of Income Loss Recognized From Equity Method Investments [Table Text Block] The following table summarizes income or (loss) recognized from equity method investments for the periods presented (amounts in thousands):

      Three Months Ended July 31,       Six Months Ended July 31,  
      2013       2012       2013       2012  
                                 
Big River   $ 2,092     $ 104     $ 2,736     $ 661  
Patriot     2,536       (585 )     3,491       (700 )
Total   $ 4,628     $ (481 )   $ 6,227     $ (39 )
Schedule of Financial Information for Equity Method Investments [Table Text Block] Summarized financial information for each of the Company’s equity method investees is presented in the following table for the three and six months ended July 31, 2013 and 2012 (amounts in thousands):

    Three Months Ended
July 31, 2013 		    Three Months Ended
July 31, 2012 		 
    Patriot     Big River     Patriot     Big River  
                                 
Net sales and revenue   $ 102,416     $ 335,961     $ 81,578     $ 258,848  
Gross profit (loss)   $ 11,046     $ 30,063     $ (569 )   $ 8,507  
Income (loss) from continuing operations   $ 9,552     $ 21,549     $ (2,209 )   $ 1,068  
Net income (loss)   $ 9,552     $ 21,549     $ (2,209 )   $ 1,068  
    Six Months Ended
July 31, 2013 		    Six Months Ended
July 31, 2012 		 
    Patriot     Big River     Patriot     Big River  
                                 
Net sales and revenue   $ 196,474     $ 630,589     $ 171,389     $ 549,851  
Gross profit   $ 16,189     $ 45,683     $ 1,208     $ 22,515  
Income (loss) from continuing operations   $ 13,150     $ 28,180     $ (2,645 )   $ 6,786  
Net income (loss)   $ 13,150     $ 28,180     $ (2,645 )   $ 6,786