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INVESTMENTS (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Apr. 30, 2016	Oct. 31, 2017	Oct. 31, 2016	Jan. 31, 2017
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments	$ 1,094	$ 1,838		$ 1,931	$ 3,257
Proceeds from Equity Method Investment, Distribution				4,009	4,010
Gain (Loss) on Sale of Investments				(13)	$ 192
Big River [Member]
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments				15,700		$ 17,800
Proceeds from Equity Method Investment, Distribution				4,000
Equity Method Investment, Underlying Equity in Net Assets	$ 276,400			$ 276,400		$ 278,700
Patriot [Member]
INVESTMENTS (Details) [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Proceeds From Payment For Escrow Holdbacks And Adjustments			$ 2,300
Gain (Loss) on Sale of Investments			$ 200

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

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