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NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Tables)
 12 Months Ended
Jan. 31, 2016
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] The following table reconciles the basic and diluted net income per share amounts from continuing operations computations for each year presented for fiscal years 2015, 2014 and 2013 (amounts in thousands, except per-share amounts):

    2015  
    Income     Shares     Per Share  
                         
Basic net income per share from continuing operations  attributable to REX common shareholders   $ 31,436       7,297     $ 4.31  
Effect of restricted stock             10          
Diluted net income per share from continuing operations  attributable to REX common shareholders   $ 31,436       7,307     $ 4.30  
    2014  
    Income     Shares     Per Share  
                         
Basic net income per share from continuing operations  attributable to REX common shareholders   $ 86,776       8,109     $ 10.70  
Effect of stock options             9          
Diluted net income per share from continuing operations  attributable to REX common shareholders   $ 86,776       8,118     $ 10.69  
    2013  
    Income     Shares     Per Share  
                         
Basic net income per share from continuing operations  attributable to REX common shareholders   $ 34,007       8,137     $ 4.18  
Effect of stock options             43          
Diluted net income per share from continuing operations  attributable to REX common shareholders   $ 34,007       8,180     $ 4.16