DERIVATIVE FINANCIAL INSTRUMENTS (Details) bu in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2017 USD ($) bu	Jul. 31, 2016 USD ($)	Jul. 31, 2017 USD ($) bu	Jul. 31, 2016 USD ($)	Jan. 31, 2017 bu
Disclosure Text Block Supplement [Abstract]
Quantity Of Bushels Under Commodity Futures (in US Bushels) | bu	1.9		1.9		0.7
Quantity of Bushels under Forward Purchase Contract (in US Bushels) | bu	10.3		10.3		5.3
Debt Instrument, Collateral Amount | $	$ 379,000		$ 379,000
Derivative, Gain on Derivative | $	$ 853,000	$ 1,136,000	$ 977,000	$ 1,625,000