Agreement to invest during year.

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Equity method initial investments.

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Proportionate share of restricted net assets as of the reporting date.

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No definition available.

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Quantity of ethanol shipped.

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No definition available.

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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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 percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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No definition available.

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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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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Total assets that cannot be used for operating purposes because of contract or regulatory requirements that are in effect for a period that extends beyond one year.

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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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INVESTMENTS (Details) $ in Thousands, gal in Millions	3 Months Ended	12 Months Ended
INVESTMENTS (Details) $ in Thousands, gal in Millions	Apr. 30, 2016 USD ($)	Jan. 31, 2017 USD ($) gal	Jan. 31, 2016 USD ($)	Jan. 31, 2015 USD ($)	Jan. 31, 2009
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments		$ 6,144	$ 8,984	$ 32,229
Equity Method Investments		37,833	38,707
Gain (Loss) on Sale of Investments	$ 200	192	10,385
Accounts Receivable, Net, Current		11,901	13,666
Retained Earnings, Undistributed Earnings from Equity Method Investees		17,800	18,700
Big River [Member]
INVESTMENTS (Details) [Line Items]
Agreement to Invest During Year		$ 20,000
Equity Method Investment, Ownership Percentage		9.70%
Income (Loss) from Equity Method Investments		$ 6,100	6,000	18,200
Proceeds from Equity Method Investment, Distribution		7,000	7,500	18,000
Equity Method Investments		37,833	$ 38,707
Equity Method Investment, Underlying Equity in Net Assets		37,200
Other Restricted Assets		278,700
Proportionate Share of Restricted Net Assets		$ 27,000
Big River [Member] \| Burlington [Member]
INVESTMENTS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons) \| gal		107
Big River [Member] \| Illinois [Member]
INVESTMENTS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons) \| gal		125
Big River [Member] \| Dyersville [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investment, Ownership Percentage			55.30%		50.50%
Quantity of ethanol shipped (in US Gallons) \| gal		128
Big River [Member] \| Boyceville [Member]
INVESTMENTS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons) \| gal		57
Big River [Member] \| Big River Resources United Energy LLC [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investment, Ownership Percentage		55.30%
Patriot [Member]
INVESTMENTS (Details) [Line Items]
Equity Method Investment, Ownership Percentage		27.00%
Income (Loss) from Equity Method Investments			$ 2,900	14,000
Proceeds from Equity Method Investment, Distribution			$ 3,600	$ 4,900
Equity Method Initial Investments		$ 17,900
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Gain (Loss) on Disposition of Business		$ 45,500
Business Combination, Consideration Transferred		196,000
Gain (Loss) on Sale of Investments		10,400
Proceeds From Payment For Escrow Holdbacks And Adjustments		4,500
Accounts Receivable, Net, Current		$ 100