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INVESTMENTS (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Jan. 31, 2018
INVESTMENTS (Details) [Line Items]
Proceeds from Equity Method Investment, Distribution	$ 3,007	$ 4,009
Yield To Maturity Rates Minimum	2.34%
Big River [Member]
INVESTMENTS (Details) [Line Items]
Retained Earnings, Undistributed Earnings from Equity Method Investees	$ 13,700		$ 14,500
Proceeds from Equity Method Investment, Distribution	$ 3,000	$ 4,000

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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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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

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