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LEASES (Tables)
 12 Months Ended
Jan. 31, 2016
Leases [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] At January 31, 2016, the Company has lease agreements, as lessee, for rail cars and a natural gas pipeline. All of the leases are accounted for as operating leases. As of January 31, 2016, future minimum annual rentals on such leases are as follows (amounts in thousands):

Years Ended   Minimum  
January 31,   Rentals  
         
2017   $ 7,340  
2018     6,575  
2019     5,845  
2020     4,341  
2021     2,778  
Thereafter     4,169  
    $ 31,048