INVESTMENTS (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments	$ 137	$ 1,186		$ 837	$ 1,419
Proceeds from Equity Method Investment, Distribution				2,005	1,504
Gain (Loss) on Sale of Investments	(13)			(13)	192
Big River [Member]
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments				16,600		$ 17,800
Proceeds from Equity Method Investment, Distribution				2,000	$ 1,500
Equity Method Investment, Underlying Equity in Net Assets	$ 279,500			$ 279,500		$ 278,700
Patriot [Member]
INVESTMENTS (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%			100.00%
Proceeds From Payment For Escrow Holdbacks And Adjustments			$ 2,300
Gain (Loss) on Sale of Investments			$ 200