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NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Tables)
 12 Months Ended
Jan. 31, 2017
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 and 2014 (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