XML 55 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1
DERIVATIVE FINANCIAL INSTRUMENTS (Details)
bu in Millions
 3 Months Ended 9 Months Ended
Oct. 31, 2017
USD ($)
bu
Oct. 31, 2016
USD ($)
Oct. 31, 2017
USD ($)
bu
Oct. 31, 2016
USD ($)
Jan. 31, 2017
bu
Disclosure Text Block Supplement [Abstract]          
Quantity Of Bushels Under Commodity Futures (in US Bushels) | bu 1.5   1.5   0.7
Quantity of Bushels under Forward Purchase Contract (in US Bushels) | bu 4.7   4.7   5.3
Debt Instrument, Collateral Amount | $ $ 230,000   $ 230,000    
Derivative, Gain on Derivative | $ $ 75,000 $ 115,000 $ 1,052,000 $ 1,740,000