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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jul. 31, 2014	Aug. 28, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	REX AMERICAN RESOURCES Corp
Document Type	10-Q
Current Fiscal Year End Date	--01-31
Entity Common Stock, Shares Outstanding		8,182,031
Amendment Flag	false
Entity Central Index Key	0000744187
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jul. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Current assets:
Cash and cash equivalents	$ 152,236	$ 105,149
Restricted cash		500
Accounts receivable	13,992	16,486
Inventory	17,287	19,370
Refundable income taxes		268
Prepaid expenses and other	5,413	4,891
Deferred taxes, net		2,146
Total current assets	188,928	148,810
Property and equipment, net	197,235	202,258
Other assets	5,288	5,388
Equity method investments	78,069	71,189
Restricted investments and deposits		223
Total assets	469,520	427,868
Current liabilities:
Current portion of long-term debt	24,000	12,226
Accounts payable, trade	6,667	6,626
Deferred taxes	3,400
Derivative financial instruments	371	1,141
Accrued expenses and other current liabilities	12,472	12,147
Total current liabilities	46,910	32,140
Long-term liabilities:
Long-term debt	38,000	63,500
Deferred taxes	19,597	19,613
Other long-term liabilities	1,890	1,862
Total long-term liabilities	59,487	84,975
REX shareholders’ equity:
Common stock	299	299
Paid-in capital	144,791	144,051
Retained earnings	400,750	357,101
Treasury stock	(221,419)	(222,170)
Total REX shareholders’ equity	324,421	279,281
Noncontrolling interests	38,702	31,472
Total equity	363,123	310,753
Total liabilities and equity	$ 469,520	$ 427,868

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Net sales and revenue	$ 150,231,000	$ 175,389,000	$ 306,167,000	$ 353,813,000
Cost of sales	111,413,000	164,511,000	230,724,000	333,937,000
Gross profit	38,818,000	10,878,000	75,443,000	19,876,000
Selling, general and administrative expenses	(4,839,000)	(4,194,000)	(11,010,000)	(7,935,000)
Equity in income of unconsolidated affiliates	7,245,000	4,628,000	15,542,000	6,227,000
Interest and other income	88,000	45,000	140,000	86,000
Interest expense	(591,000)	(1,029,000)	(1,283,000)	(2,084,000)
Losses on derivative financial instruments, net	(1,000)	(10,000)	(5,000)	(6,000)
Income from continuing operations before income taxes	40,720,000	10,318,000	78,827,000	16,164,000
Provision for income taxes	(14,009,000)	(3,694,000)	(27,925,000)	(5,763,000)
Income from continuing operations	26,711,000	6,624,000	50,902,000	10,401,000
Income from discontinued operations, net of tax	2,000	120,000	11,000	285,000
Gain on disposal of discontinued operations, net of tax	5,000	1,000	5,000	132,000
Net income	26,718,000	6,745,000	50,918,000	10,818,000
Net income attributable to noncontrolling interests	(4,811,000)	(920,000)	(7,269,000)	(1,486,000)
Net income attributable to REX common shareholders	$ 21,907,000	$ 5,825,000	$ 43,649,000	$ 9,332,000
Weighted average shares outstanding – basic (in Shares)	8,182	8,164	8,150	8,161
Basic income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.70	$ 5.36	$ 1.09
Basic income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)		0.01		0.03
Basic income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)				0.02
Basic net income per share attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.71	$ 5.36	$ 1.14
Weighted average shares outstanding – diluted (in Shares)	8,182	8,204	8,166	8,204
Diluted income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.70	$ 5.35	$ 1.09
Diluted income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)		0.01		0.03
Diluted income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)				0.02
Diluted net income per share attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.71	$ 5.35	$ 1.14
Amounts attributable to REX common shareholders:
Income from continuing operations, net of tax	$ 21,900,000	$ 5,704,000	$ 43,633,000	$ 8,915,000
Income from discontinued operations, net of tax	7,000	121,000	16,000	417,000
Net income	$ 21,907,000	$ 5,825,000	$ 43,649,000	$ 9,332,000

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2013	$ 299	$ (219,550)	$ 143,575	$ 322,028	$ 27,931	$ 274,283
Balance (in Shares) at Jan. 31, 2013	29,853	21,701
Net income				9,332	1,486	10,818
Treasury stock acquired		$ (856)				(856)
Treasury stock acquired (in Shares)		46
Stock options and related tax effects		$ 636	213			849
Stock options and related tax effects (in Shares)		(62)
Balance at Jul. 31, 2013	$ 299	$ (219,770)	143,788	331,360	29,417	285,094
Balance (in Shares) at Jul. 31, 2013	29,853	21,685
Balance at Jan. 31, 2014	$ 299	$ (222,170)	144,051	357,101	31,472	310,753
Balance (in Shares) at Jan. 31, 2014	29,853	21,753
Net income				43,649	7,269	50,918
Treasury stock acquired		$ (100)				(100)
Treasury stock acquired (in Shares)		2
Noncontrolling interests distribution and other					(39)	(39)
Stock options and related tax effects		$ 851	740			1,591
Stock options and related tax effects (in Shares)		(84)
Balance at Jul. 31, 2014	$ 299	$ (221,419)	$ 144,791	$ 400,750	$ 38,702	$ 363,123
Balance (in Shares) at Jul. 31, 2014	29,853	21,671

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Cash flows from operating activities:
Net income including noncontrolling interests	$ 50,918	$ 10,818
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, impairment charges and amortization	8,350	8,811
Income from equity method investments	(15,542)	(6,227)
Gain on disposal of real estate and property and equipment	(3)	(6)
Dividends received from equity method investees	8,592	200
Deferred income		(484)
Derivative financial instruments	(770)	(856)
Deferred income tax	5,323	5,410
Excess tax benefit from stock option exercises	(441)
Changes in assets and liabilities:
Accounts receivable	2,494	(5,842)
Inventories	2,083	(4,453)
Other assets	463	164
Accounts payable, trade	(198)	1,310
Other liabilities	353	(363)
Net cash provided by operating activities	61,622	8,482
Cash flows from investing activities:
Capital expenditures	(3,402)	(252)
Restricted cash	500	(500)
Restricted investments and deposits	273	180
Proceeds from sale of real estate and property and equipment	487	463
Net cash used in investing activities	(2,142)	(109)
Cash flows from financing activities:
Payments of long-term debt	(13,726)	(8,629)
Stock options exercised	931	794
Payments to noncontrolling interests holders	(39)
Excess tax benefit from stock option exercises	441
Treasury stock acquired		(856)
Net cash used in financing activities	(12,393)	(8,691)
Net increase (decrease) in cash and cash equivalents	47,087	(318)
Cash and cash equivalents, beginning of period	105,149	69,073
Cash and cash equivalents, end of period	152,236	$ 68,755
Non cash investing activities – Accrued capital expenditures	$ 239

Consolidated Condensed Financial Statements

6 Months Ended

Jul. 31, 2014

Disclosure Text Block [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note 1. Consolidated Condensed Financial Statements

The consolidated condensed financial statements included in this report have been prepared by the Company, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission and include, in the opinion of management, all adjustments necessary to state fairly the information set forth therein. Any such adjustments were of a normal recurring nature. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. Financial information as of January 31, 2014 included in these financial statements has been derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2014 (fiscal year 2013). It is suggested that these unaudited consolidated condensed financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2014. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the year.

Basis of Consolidation – The consolidated condensed financial statements in this report include the operating results and financial position of REX American Resources Corporation and its wholly and majority owned subsidiaries. The Company includes the results of operations of One Earth Energy, LLC (“One Earth”) in its Consolidated Condensed Statements of Operations on a delayed basis of one month.

Nature of Operations – The Company operates in two reportable segments, alternative energy and real estate.

Accounting Policies

6 Months Ended

Jul. 31, 2014

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

Note 2. Accounting Policies

The interim consolidated condensed financial statements have been prepared in accordance with the accounting policies described in the notes to the consolidated financial statements included in the Company’s fiscal year 2013 Annual Report on Form 10-K. While management believes that the procedures followed in the preparation of interim financial information are reasonable, the accuracy of some estimated amounts is dependent upon facts that will exist or calculations that will be accomplished at fiscal year-end. Examples of such estimates include accrued liabilities, such as management bonuses, and the provision for income taxes. Any adjustments pursuant to such estimates during the quarter were of a normal recurring nature. Actual results could differ from those estimates.

Revenue Recognition

The Company recognizes sales from the production of ethanol, distillers grains and non-food grade corn oil when title transfers to customers, upon shipment from its plant. Shipping and handling charges billed to customers are included in net sales and revenue.

The Company includes income from real estate leasing activities in net sales and revenue. The Company accounts for these leases as operating leases. Accordingly, minimum rental revenue is recognized on a straight-line basis over the term of the lease.

Cost of Sales

Alternative energy cost of sales includes depreciation, costs of raw materials, inbound freight charges, purchasing and receiving costs, inspection costs, shipping costs, other distribution expenses, warehousing costs, plant management, certain compensation costs, and general facility overhead charges.

Real estate cost of sales includes depreciation, real estate taxes, insurance, repairs and maintenance and other costs directly associated with operating the Company’s portfolio of real property.

Selling, General and Administrative Expenses

The Company includes non-production related costs from its alternative energy segment such as professional fees, selling charges and certain payroll in selling, general and administrative expenses.

The Company includes costs not directly related to operating its portfolio of real property from its real estate segment such as certain payroll and related costs, professional fees and other general expenses in selling, general and administrative expenses.

The Company includes costs associated with its corporate headquarters such as certain payroll and related costs, professional fees and other general expenses in selling, general and administrative expenses.

Interest Cost

Interest paid for the three months ended July 31, 2014 and 2013 was approximately $496,000 and $941,000, respectively. Interest paid for the six months ended July 31, 2014 and 2013 was approximately $1,316,000 and $1,922,000, respectively

Financial Instruments

The Company uses derivative financial instruments to manage its balance of fixed and variable rate debt. The Company does not hold or issue derivative financial instruments for trading or speculative purposes. Interest rate swap agreements involve the exchange of fixed and variable rate interest payments and do not represent an actual exchange of the notional amounts between the parties. The swap agreement was not designated for hedge accounting pursuant to Accounting Standards Codification (“ASC”) 815, Derivatives and Hedging (“ASC 815”). The interest rate swap is recorded at its fair value and the changes in fair value are recorded as gain or loss on derivative financial instruments in the Consolidated Condensed Statements of Operations. The Company paid settlements of an interest rate swap of approximately $376,000 and $422,000 for the three months ended July 31, 2014 and 2013, respectively. The Company paid settlements of the interest rate swap of approximately $774,000 and $862,000 for the six months ended July 31, 2014 and 2013, respectively.

Forward grain purchase and ethanol, distillers grains and non-food grade corn oil sale contracts are accounted for under the “normal purchases and normal sales” scope exemption of ASC 815 because these arrangements are for purchases of grain that will be delivered in quantities expected to be used by the Company and sales of ethanol, distillers grains and non-food grade corn oil quantities expected to be produced by the Company over a reasonable period of time in the normal course of business.

Income Taxes

The Company applies an effective tax rate to interim periods that is consistent with the Company’s estimated annual tax rate. The Company provides for deferred tax liabilities and assets for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. The Company provides for a valuation allowance if, based on the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company paid income taxes of $18,521,000 during the six months ended July 31, 2014 and paid no income taxes during the six months ended July 31, 2013.

As of July 31, 2014, total unrecognized tax benefits were approximately $1,451,000 and accrued penalties and interest were approximately $439,000. If the Company were to prevail on all unrecognized tax benefits recorded, approximately $24,000 of the reserve would benefit the effective tax rate. In addition, the impact of penalties and interest would also benefit the effective tax rate. Interest and penalties associated with unrecognized tax benefits are recorded within income tax expense. On a quarterly and annual basis, the Company accrues for the effects of open uncertain tax positions and the related potential penalties and interest.

Inventories

Inventories are carried at the lower of cost or market on a first-in, first-out basis. Alternative energy segment inventory includes direct production costs and certain overhead costs such as depreciation, property taxes and utilities related to producing ethanol and related by-products. Inventory is permanently written down for instances when cost exceeds estimated net realizable value; such write-downs are based primarily upon commodity prices as the market value of inventory is often dependent upon changes in commodity prices. There was no material permanent write-down of inventory at July 31, 2014 and January 31, 2014, respectively. Fluctuations in the write-down of inventory generally relate to the levels and composition of such inventory at a given point in time. The components of inventory at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Ethanol and other finished goods	$	3,764	$	3,517
Work in process		2,679		3,017
Grain and other raw materials		10,844		12,836
Total	$	17,287	$	19,370

Property and Equipment

Property and equipment is recorded at cost. Depreciation is computed using the straight-line method. Estimated useful lives are 15 to 40 years for buildings and improvements, and 3 to 20 years for fixtures and equipment.

Investments

The method of accounting applied to long-term investments, whether consolidated, equity or cost, involves an evaluation of the significant terms of each investment that explicitly grant or suggest evidence of control or influence over the operations of the investee and also includes the identification of any variable interests in which the Company is the primary beneficiary. The Company consolidates the results of two majority owned subsidiaries, One Earth and NuGen. The results of One Earth are included on a delayed basis of one month. The Company accounts for investments in limited liability companies in which it may have a less than 20% ownership interest, using the equity method of accounting when the factors discussed in ASC 323, “Investments-Equity Method and Joint Ventures” are met. The excess of the carrying value over the underlying equity in the net assets of equity method investees is allocated to specific assets and liabilities. Any unallocated excess is treated as goodwill and is recorded as a component of the carrying value of the equity method investee. Investments in businesses that the Company does not control but for which it has the ability to exercise significant influence over operating and financial matters are accounted for using the equity method. Investments in which the Company does not have the ability to exercise significant influence over operating and financial matters are accounted for using the cost method. The Company accounts for its investments in Big River Resources, LLC (“Big River”) and Patriot Holdings, LLC (“Patriot”) using the equity method of accounting and includes the results of these entities on a delayed basis of one month.

The Company periodically evaluates its investments for impairment due to declines in market value considered to be other than temporary. Such impairment evaluations include, in addition to persistent, declining market prices, general economic and company-specific evaluations. If the Company determines that a decline in market value is other than temporary, then a charge to earnings is recorded in the Consolidated Condensed Statements of Operations and a new cost basis in the investment is established.

Comprehensive Income

The Company has no components of other comprehensive income, and therefore, comprehensive income equals net income.

Accounting Changes and Recently Issued Accounting Standards

Effective February 1, 2014, the Company was required to adopt Accounting Standard Update (“ASU”) No. 2013-11 (“ASU 2013-11”), “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”. The update requires, unless certain conditions exists, an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, similar tax loss, or a tax credit carryforward. ASU 2013-11 was effective prospectively for reporting periods beginning after December 15, 2013, with early adoption permitted. Retrospective application is permitted. The adoption of ASU 2013-11 did not impact the Company’s financial statements.

In April 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-08 (“ASU 2014-08”), “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity” that changes the criteria for reporting a discontinued operation. Under this new guidance, only disposals of a component that represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results is a discontinued operation. Expanded disclosures about discontinued operations and disposals of a significant part of an entity that does not qualify for discontinued operations reporting are also required. ASU 2014-08 is effective beginning February 1, 2015 with early adoption permitted, but only for disposals (or classifications as held for sale) that have not been reported in previously-issued financial statements. Management has not determined the impact of adopting ASU 2014-08 on the Company’s consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09 (“ASU 2014-09”), “Revenue From Contracts With Customers”. The update requires revenue recognition to reflect the transfer of promised goods or services to customers and replaces existing revenue recognition guidance. The updated standard permits the use of either the retrospective or cumulative effect transition method. The Company will be required to adopt ASU 2014-09 effective February 1, 2017. The Company has not determined the impact of adopting ASU 2014-09 on the Company’s consolidated financial statements.

Leases

6 Months Ended

Jul. 31, 2014

Leases [Abstract]

Leases of Lessor Disclosure [Text Block]

Note 3. Leases

At July 31, 2014, the Company has lease agreements, as landlord, for five owned former retail stores. All of the leases are accounted for as operating leases. The following table is a summary of future minimum rentals on such leases (amounts in thousands):

Years Ended January 31,	Minimum Rentals

Remainder of 2015	$	185
2016		392
2017		349
2018		117
Total	$	1,043

- Definition

The entire disclosure for lessor entity's leasing arrangements for operating, capital and leveraged leases.

+ References + Details

Fair Value

6 Months Ended

Jul. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Note 4. Fair Value

The Company applies ASC 820, Fair Value Measurements and Disclosures, (“ASC 820”) which provides a framework for measuring fair value under GAAP. This accounting standard defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The Company determines the fair market values of its financial instruments based on the fair value hierarchy established by ASC 820. ASC 820 requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair values which are provided below. The Company carries cash equivalents, investment in cooperative, certain restricted investments and derivative liabilities at fair value.

Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market, as well as certain U.S. Treasury securities that are highly liquid and are actively traded in over-the-counter markets.

Level 2 – Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally or corroborated by observable market data.

Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methods, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Unobservable inputs shall be developed based on the best information available, which may include the Company’s own data.

The fair values of interest rate swaps are determined by using quantitative models that discount future cash flows using the LIBOR forward interest rate curve. Estimation risk is greater for derivative asset and liability positions that are either option-based or have longer maturity dates where observable market inputs are less readily available or are unobservable, in which case interest rate, price or index scenarios are extrapolated in order to determine the fair value. The fair values of derivative assets and liabilities include adjustments for market liquidity, counterparty credit quality, the Company’s own credit standing and other specific factors, where appropriate.

The fair values of property and equipment, as applicable, are determined by using various models that discount future expected cash flows. Estimation risk is greater for vacant properties as the probability of expected cash flows from the use of vacant properties is difficult to predict.

To ensure the prudent application of estimates and management judgment in determining the fair values of derivative assets and liabilities and property and equipment, various processes and controls have been adopted, which include: model validation that requires a review and approval for pricing, financial statement fair value determination and risk quantification; periodic review and substantiation of profit and loss reporting for all derivative instruments and property and equipment items.

Financial assets and liabilities measured at fair value on a recurring basis at July 31, 2014 are summarized below (amounts in thousands):

	Level 1		Level 2		Level 3		Fair Value

Investment in cooperative (1)	$	—	$	—	$	311	$	311
Interest rate swap derivative liability	$	—	$	371	$	—	$	371

Financial assets and liabilities measured at fair value on a recurring basis at January 31, 2014 are summarized below (amounts in thousands):

	Level 1		Level 2		Level 3		Fair Value

Cash equivalents	$	2	$	—	$	—	$	2
Money market mutual fund (1)		120		—		—		120
Investment in cooperative (1)		—		—		289		289
Total assets	$	122	$	—	$	289	$	411
Interest rate swap derivative liability	$	—	$	1,141	$	—	$	1,141

(1) The money market mutual fund and the investment in cooperative are included in “Other assets” on the accompanying Consolidated Condensed Balance Sheets.

The following table provides a reconciliation of the activity related to assets (investment in cooperative) measured at fair value on a recurring basis using Level 3 inputs (amounts in thousands):

Balance, January 31, 2014	$	289
Current period activity		10
Balance, April 30, 2014		299
Current period activity		12
Balance, July 31, 2014	$	311

Balance, January 31, 2013	$	252
Current period activity		—
Balance, April 30, 2013		252
Current period activity		10
Balance, July 31, 2013	$	262

The Company determined the fair value of the investment in cooperative by using a discounted cash flow analysis on the expected cash flows. Inputs used in the analysis include the face value of the allocated equity amount, the projected term for repayment based upon a historical trend, and a risk adjusted discount rate based on the expected compensation participants would demand because of the uncertainty of the future cash flows. The inherent risk and uncertainty associated with unobservable inputs could have a significant effect on the actual fair value of the investment.

There were no assets measured at fair value on a non-recurring basis as of July 31, 2014.

Assets measured at fair value on a non-recurring basis as of January 31, 2014 are summarized below (amounts in thousands):

		Level 1				Level 2				Level 3				Total Losses (1)
Property and equipment, net		$	—			$	—			$	521			$	55

(1) Total losses include impairment charges and loss on disposal.

The fair value of the Company’s debt is approximately $62.0 million and $75.1 million at July 31, 2014 and January 31, 2014, respectively. The fair value was estimated with Level 2 inputs using a discounted cash flow analysis and the Company’s estimate of market rates of interest for similar loan agreements with companies that have a similar credit risk.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Property and Equipment

6 Months Ended

Jul. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

Note 5. Property and Equipment

The components of property and equipment at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014			January 31, 2014

Land and improvements	$	21,424		$	21,543
Buildings and improvements		28,304			28,297
Machinery, equipment and fixtures		224,124			223,544
Construction in progress		3,093			693
		276,945			274,077
Less: accumulated depreciation		(79,710	)		(71,819	)

	$	197,235		$	202,258

Other Assets

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Other Assets Disclosure [Text Block]

Note 6. Other Assets

The components of other assets at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Deferred financing costs, net	$	301	$	402
Deposits		964		1,014
Real estate taxes refundable		3,658		3,644
Other		365		328
Total	$	5,288	$	5,388

Accrued Expenses and Other Current Liabilities

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]

Note 7. Accrued Expenses and Other Current Liabilities

The components of accrued expenses and other current liabilities at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Accrued utility charges	$	1,655	$	3,745
Accrued income taxes		3,656		—
Accrued payroll and related items		3,453		3,122
Accrued real estate taxes		1,939		2,471
Other		1,769		2,809
Total	$	12,472	$	12,147

Long Term Debt and Interest Rate Swaps

6 Months Ended

Jul. 31, 2014

Disclosure Text Block [Abstract]

Long-term Debt [Text Block]

Note 8. Long Term Debt and Interest Rate Swap

One Earth Energy Subsidiary Level Debt

During the third quarter of fiscal year 2009, pursuant to the terms of the loan agreement, One Earth converted its construction loan into a term loan. On September 3, 2013, One Earth entered into an amendment of its loan agreement with First National Bank of Omaha (“the Bank”). The amendment included a refinance amount of approximately $44,101,000 (the remaining balance of the original loan) which bears interest at a variable interest rate of LIBOR plus 300 basis points (3.2% at July 31, 2014). Quarterly principal payments of approximately $2.0 million are due beginning January 8, 2014 and ending July 8, 2018. Principal payments equal to 20% of annual excess cash flows are also due. Such payments cannot exceed $6 million in a year or $18 million in the aggregate. This amendment did not significantly change requirements regarding financial covenants. The Company expects that One Earth will make a principal payment of $6 million within the next twelve months as a result of the calculation of excess cash flows for fiscal year 2014, and has included that amount in current portion of long term debt in the Consolidated Condensed Balance Sheets.

Borrowings are secured by all of the assets of One Earth. This debt is recourse only to One Earth and not to REX American Resources Corporation or any of its other subsidiaries. As of July 31, 2014 and January 31, 2014, approximately $32.0 million and $39.1 million, respectively, was outstanding on the term loan. One Earth is also subject to certain financial covenants under the loan agreement, including debt service coverage ratio requirements and working capital requirements.

One Earth has a $10.0 million revolving loan facility that matures July 31, 2015. Borrowings under this facility bear interest at LIBOR plus 265 basis points. One Earth had no outstanding borrowings on the revolving loan as of July 31, 2014 or January 31, 2014.

One Earth has paid approximately $1.4 million in financing costs. These costs are recorded as deferred financing costs and are amortized ratably over the term of the loan.

The Company’s proportionate share of restricted net assets related to One Earth was approximately $100.7 million and $86.9 million at July 31, 2014 and January 31, 2014, respectively. Restricted net assets may not be paid in the form of dividends or advances to the parent company or other members of One Earth per the terms of the loan agreement with the Bank.

One Earth entered into a forward interest rate swap in the notional amount of $50.0 million with the Bank. The swap fixed a portion of the variable interest rate of the term loan subsequent to the plant completion date at 7.9%. At July 31, 2014 and January 31, 2014, the Company recorded a liability of approximately $0.4 million and $1.1 million, respectively, related to the fair value of the swap. The change in fair value is recorded in the Consolidated Condensed Statements of Operations. The swap will mature during the third quarter of fiscal year 2014 and will require a final settlement payment of approximately $0.4 million resulting in a gain or loss of less than $5,000.

NuGen Energy Subsidiary Level Debt

In November 2011, NuGen entered into a $65,000,000 financing agreement consisting of a term loan for $55,000,000 and a $10,000,000 annually renewable revolving loan with the Bank. Effective May 31, 2014, NuGen entered into an amendment of its loan agreement with the Bank. The amendment included a refinance amount of $30,000,000 (the remaining balance of the original loan) which bears interest at a variable interest rate of LIBOR plus 300 basis points (3.2% at July 31, 2014). Beginning with the first quarterly payment on August 1, 2014, payments are due in 20 quarterly payments of principal plus accrued interest with the principal portion calculated based on a 60 month amortization schedule. Principal payments equal to 20% of annual excess cash flows are also due. Such payments cannot exceed $6 million in a year. This amendment did not significantly change requirements regarding financial covenants. The Company expects that NuGen will make a principal payment of $6 million within the next twelve months as a result of the calculation of excess cash flows for fiscal year 2014, and has included that amount in current portion of long term debt in the Consolidated Condensed Balance Sheets.

Borrowings are secured by all of the assets of NuGen. This debt is recourse only to NuGen and not to REX American Resources Corporation or any of its other subsidiaries. As of July 31, 2014 and January 31, 2014, approximately $30.0 million and $36.6 million, respectively, was outstanding on the term loan. NuGen is also subject to certain financial covenants under the loan agreement, including debt service coverage ratio requirements and working capital requirements.

NuGen has paid approximately $0.6 million in financing costs. These costs are recorded as deferred financing costs and are amortized ratably over the term of the loan.

NuGen has a $10.0 million revolving loan facility that matures May 31, 2015. Borrowings under this facility bear interest at LIBOR plus 275 basis points. NuGen had no outstanding borrowings on the revolving loan as of July 31, 2014 or January 31, 2014.

The Company’s proportionate share of restricted net assets related to NuGen was approximately $96.3 million and $66.1 million at July 31, 2014 and January 31, 2014, respectively. Restricted net assets may not be paid in the form of dividends or advances to the parent company or other members of NuGen per the terms of the loan agreement with the Bank.

See Note 18 for a discussion of loan repayments paid by One Earth and NuGen occuring subsequent to July 31, 2014.

Financial Instruments

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Financial Instruments Disclosure [Text Block]

Note 9. Financial Instruments

The Company uses an interest rate swap, which will expire during the third quarter of fiscal year 2014, to manage its interest rate exposure at One Earth by fixing the interest rate on a portion of the entity’s variable rate debt. The Company does not engage in trading activities involving derivative contracts for which a lack of marketplace quotations would necessitate the use of fair value estimation techniques. The notional amount and fair value of the derivative, which is not designated as a cash flow hedge at July 31, 2014, are summarized in the table below (amounts in thousands):

	Notional Amount		Fair Value Liability

Interest rate swap	$	31,118	$	371

As the interest rate swap is not designated as a cash flow hedge, the unrealized gain and loss on the derivative is reported in current earnings. The Company reported losses of $1,000 and $10,000 in the second quarter of fiscal years 2014 and 2013, respectively. The Company reported losses of $5,000 and $6,000 in the first six months of fiscal years 2014 and 2013, respectively.

Stock Option Plans

6 Months Ended

Jul. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Note 10. Stock Option Plans

The Company has stock-based compensation plans under which stock options have been granted to directors, officers and key employees at the market price on the date of the grant. No options have been granted since fiscal year 2004 and there are no outstanding options at July 31, 2014.

The total intrinsic value of options exercised during the six months ended July 31, 2014 and 2013 was approximately $4.0 million and $0.5 million, respectively, resulting in tax deductions of approximately $0.8 million and $0.2 million, respectively. The following table summarizes options granted, exercised and canceled or expired during the six months ended July 31, 2014:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at January 31, 2014		83,330		$	12.37
Exercised		(83,330	)	$	12.37
Outstanding and exercisable at July 31, 2014		—		$	—		—	$	—

Income Per Share from Continuing Operations Attributable to REX Common Shareholders

6 Months Ended

Jul. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 11. Income Per Share from Continuing Operations Attributable to REX Common Shareholders

The following table reconciles the computation of basic and diluted net income per share from continuing operations for the periods presented (in thousands, except per share amounts):

	Three Months Ended						Three Months Ended
	July 31, 2014						July 31, 2013
	Income		Shares		Per Share		Income		Shares		Per Share
Basic income per share from continuing operations attributable to REX common shareholders	$	21,900		8,182	$	2.68	$	5,704		8,164	$	0.70
Effect of stock options		—		—				—		40
Diluted income per share from continuing operations attributable to REX common shareholders	$	21,900		8,182	$	2.68	$	5,704		8,204	$	0.70

	Six Months Ended						Six Months Ended
	July 31, 2014						July 31, 2013
	Income		Shares		Per Share		Income		Shares		Per Share
Basic income per share from continuing operations attributable to REX common shareholders	$	43,633		8,150	$	5.36	$	8,915		8,161	$	1.09
Effect of stock options		—		16				—		43
Diluted income per share from continuing operations attributable to REX common shareholders	$	43,633		8,166	$	5.35	$	8,915		8,204	$	1.09

For the three months and six months ended July 31, 2014 and 2013, all shares subject to outstanding options were dilutive.

Investments

6 Months Ended

Jul. 31, 2014

Investments And Deposits [Text Block] [Abstract]

Investments And Deposits [Text Block]

Note 12. Investments

The following table summarizes equity method investments at July 31, 2014 and January 31, 2014 (amounts in thousands):

Entity	Ownership Percentage		Carrying Amount July 31, 2014		Carrying Amount January 31, 2014

Big River	10	%	$	42,804	$	40,042
Patriot	27	%		35,265		31,147
Total Equity Method Investments			$	78,069	$	71,189

The following table summarizes income recognized from equity method investments for the periods presented (amounts in thousands):

	Three Months Ended July 31,				Six Months Ended July 31,
	2014		2013		2014		2013

Big River	$	4,720	$	2,092	$	9,779	$	2,736
Patriot		2,525		2,536		5,763		3,491
Total	$	7,245	$	4,628	$	15,542	$	6,227

Undistributed earnings of Big River and Patriot totaled approximately $39.5 million and $32.6 million at July 31, 2014 and January 31, 2014, respectively. During the first six months of fiscal years 2014 and 2013, the Company received dividends from equity method investees of approximately $8.6 million and $0.2 million, respectively.

Summarized financial information for each of the Company’s equity method investees is presented in the following table for the three and six months ended July 31, 2014 and 2013 (amounts in thousands):

	Three Months Ended July 31, 2014				Three Months Ended July 31, 2013

	Patriot		Big River		Patriot		Big River

Net sales and revenue	$	79,127	$	312,843	$	102,416	$	335,961
Gross profit	$	11,244	$	40,476	$	11,046	$	30,063
Income from continuing operations	$	9,511	$	48,618	$	9,552	$	21,549
Net income	$	9,511	$	48,618	$	9,552	$	21,549

	Six Months Ended July 31, 2014				Six Months Ended July 31, 2013

	Patriot		Big River		Patriot		Big River

Net sales and revenue	$	159,536	$	593,267	$	196,474	$	630,589
Gross profit	$	25,029	$	124,310	$	16,189	$	45,683
Income from continuing operations	$	21,705	$	100,739	$	13,150	$	28,180
Net income	$	21,705	$	100,739	$	13,150	$	28,180

Patriot and Big River have debt agreements that limit and restrict amounts the companies can pay in the form of dividends or advances to owners. The restricted net assets of Patriot and Big River combined at July 31, 2014 and January 31, 2014 are approximately $368.0 million and $366.2 million, respectively.

Income Taxes

6 Months Ended

Jul. 31, 2014

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Note 13. Income Taxes

The effective tax rate on consolidated pre-tax income from continuing operations was 34.4% for the three months ended July 31, 2014, and 35.8% for the three months ended July 31, 2013. The effective tax rate on consolidated pre-tax income from continuing operations was 35.4% for the six months ended July 31, 2014, and 35.7% for the six months ended July 31, 2013. The fluctuations in the effective tax rate primarily relate to the presentation of noncontrolling interests in the income of consolidated subsidiaries as noncontrolling interests are presented in the Consolidated Condensed Statements of Operations after the income tax provision or benefit. Net income attributable to noncontrolling interests was a higher percentage of income from continuing operations before income taxes in the fiscal year 2014 compared to fiscal year 2013.

The Company files a U.S. federal income tax return and income tax returns in various states. In general, the Company is no longer subject to U.S. federal, state or local income tax examinations by tax authorities for years ended January 31, 2010 and prior. A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands):

Unrecognized tax benefits, January 31, 2014	$	1,862
Changes for prior years’ tax positions		28
Changes for current year tax positions		—
Unrecognized tax benefits, July 31, 2014	$	1,890

Discontinued Operations

6 Months Ended

Jul. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

Note 14. Discontinued Operations

During fiscal year 2009, the Company completed the exit of its retail business. Accordingly, all operations of the Company’s former retail segment and certain sold properties have been classified as discontinued operations for all periods presented. Once real estate property has been sold, and no continuing involvement is expected, the Company classifies the results of the operations as discontinued operations. The results of operations were previously reported in the Company’s real estate segment. Below is a table reflecting certain items of the Consolidated Condensed Statements of Operations that were reclassified as discontinued operations for the periods indicated (amounts in thousands):

	Three Months Ended						Six Months Ended
	July 31,						July 31,
	2014			2013			2014			2013

Net sales and revenue	$	—		$	500		$	—		$	1,082
Cost of sales		(3	)		214			(18	)		451

Income before income taxes		3			197			18			468
Provision for income taxes		(1	)		(77	)		(7	)		(183	)
Income from discontinued operations, net of tax	$	2		$	120		$	11		$	285
Gain on disposal	$	8		$	2		$	8		$	217
Provision for income taxes		(3	)		(1	)		(3	)		(85	)
Gain on disposal of discontinued operations, net of tax	$	5		$	1		$	5		$	132

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Commitments and Contingencies

6 Months Ended

Jul. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Note 15. Commitments and Contingencies

The Company is involved in various legal actions arising in the normal course of business. After taking into consideration legal counsels’ evaluations of such actions, management is of the opinion that their outcome will not have a material effect on the Company’s consolidated condensed financial statements.

One Earth and NuGen have combined forward purchase contracts for approximately 7.3 million bushels of corn, the principal raw material for their ethanol plants. They expect to take delivery of a majority of the grain through October 2014.

One Earth and NuGen have combined sales commitments for approximately 36.5 million gallons of ethanol, approximately 101,000 tons of distillers grains and approximately 7.1 million pounds of non-food grade corn oil. They expect to deliver a majority of the ethanol, distillers grains and non-food grade corn oil through October 2014.

Segment Reporting

6 Months Ended

Jul. 31, 2014

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Note 16. Segment Reporting

The Company has two segments: alternative energy and real estate. The Company evaluates the performance of each reportable segment based on segment profit. Segment profit excludes income taxes, indirect interest expense, discontinued operations, indirect interest income and certain other items that are included in net income determined in accordance with GAAP. Segment profit includes realized and unrealized gains and losses on derivative financial instruments. The following table summarizes segment and other results and assets (amounts in thousands):

	Three Months Ended July 31,						Six Months Ended July 31,
	2014			2013			2014			2013
Net sales and revenue:
Alternative energy	$	150,133		$	175,290		$	305,960		$	353,614
Real estate		98			99			207			199
Total net sales and revenues	$	150,231		$	175,389		$	306,167		$	353,813

Segment gross profit (loss):
Alternative energy	$	38,820		$	10,890		$	75,434		$	19,916
Real estate		(2	)		(12	)		9			(40	)
Total gross profit	$	38,818		$	10,878		$	75,443		$	19,876

Segment profit (loss):
Alternative energy	$	41,509		$	11,114		$	80,385		$	17,740
Real estate		(28	)		(74	)		(44	)		(163	)
Corporate expense, net		(761	)		(722	)		(1,514	)		(1,413	)
Income from continuing operations before income taxes and noncontrolling interests	$	40,720		$	10,318		$	78,827		$	16,164

	July 31, 2014		January 31, 2014
Assets:
Alternative energy	$	413,883	$	356,589
Real estate		4,141		4,722
Corporate		51,496		66,557
Total assets	$	469,520	$	427,868

Certain corporate costs and expenses, including information technology, employee benefits and other shared services are allocated to the business segments. The allocations are generally amounts agreed upon by management and are based on a reasonable and systematic approach, which may differ from amounts that would be incurred if such services were purchased separately by the business segment. Corporate assets are primarily cash.

Cash, except for cash held by One Earth and NuGen, is considered to be fungible and available for both corporate and segment use depending on liquidity requirements. Cash of approximately $101.8 million held by One Earth and NuGen will be used by the subsidiaries primarily to fund liquidity requirements, maintain adequate working capital levels and pay dividends.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Related-Party Transactions

6 Months Ended

Jul. 31, 2014

Note 17. Related-Party Transactions

During the second quarters of fiscal year 2014 and 2013, One Earth purchased approximately $40.4 million and approximately $78.7 million, respectively, of corn from the Alliance Grain Elevator, an equity investor in One Earth. Such purchases totaled approximately $85.2 million and approximately $150.4 million for the six months ended July 31, 2014 and 2013, respectively.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Subsequent Events

6 Months Ended

Jul. 31, 2014

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Note 18. Subsequent Events

In August 2014, One Earth and NuGen made accelerated principal payments totaling $17 million that were expected to be due in the next twelve months.

Accounting Policies, by Policy (Policies)

3 Months Ended

Jul. 31, 2014

Accounting Policies [Abstract]

Revenue Recognition, Policy [Policy Text Block]

Revenue Recognition

Cost of Sales, Policy [Policy Text Block]

Cost of Sales

Real estate cost of sales includes depreciation, real estate taxes, insurance, repairs and maintenance and other costs directly associated with operating the Company’s portfolio of real property.

Selling, General and Administrative Expenses, Policy [Policy Text Block]

Selling, General and Administrative Expenses

The Company includes non-production related costs from its alternative energy segment such as professional fees, selling charges and certain payroll in selling, general and administrative expenses.

Interest Expense, Policy [Policy Text Block]

Interest Cost

Fair Value of Financial Instruments, Policy [Policy Text Block]

Financial Instruments

Income Tax, Policy [Policy Text Block]

Income Taxes

Inventory, Policy [Policy Text Block]

Inventories

	July 31, 2014		January 31, 2014

Ethanol and other finished goods	$	3,764	$	3,517
Work in process		2,679		3,017
Grain and other raw materials		10,844		12,836
Total	$	17,287	$	19,370

Investment, Policy [Policy Text Block]

Investments

Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income

The Company has no components of other comprehensive income, and therefore, comprehensive income equals net income.

New Accounting Pronouncements, Policy [Policy Text Block]

Accounting Changes and Recently Issued Accounting Standards

Accounting Policies (Tables)

6 Months Ended

Jul. 31, 2014

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

The components of inventory at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Ethanol and other finished goods	$	3,764	$	3,517
Work in process		2,679		3,017
Grain and other raw materials		10,844		12,836
Total	$	17,287	$	19,370

Leases (Tables)

6 Months Ended

Jul. 31, 2014

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Years Ended January 31,	Minimum Rentals

Remainder of 2015	$	185
2016		392
2017		349
2018		117
Total	$	1,043

Fair Value (Tables)

6 Months Ended

Jul. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Financial assets and liabilities measured at fair value on a recurring basis at July 31, 2014 and January 31, 2014 are summarized below (amounts in thousands):

	Level 1		Level 2		Level 3		Fair Value

Investment in cooperative (1)	$	—	$	—	$	311	$	311
Interest rate swap derivative liability	$	—	$	371	$	—	$	371

	Level 1		Level 2		Level 3		Fair Value

Cash equivalents	$	2	$	—	$	—	$	2
Money market mutual fund (1)		120		—		—		120
Investment in cooperative (1)		—		—		289		289
Total assets	$	122	$	—	$	289	$	411
Interest rate swap derivative liability	$	—	$	1,141	$	—	$	1,141

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table provides a reconciliation of the activity related to assets (investment in cooperative) measured at fair value on a recurring basis using Level 3 inputs (amounts in thousands):

Balance, January 31, 2014	$	289
Current period activity		10
Balance, April 30, 2014		299
Current period activity		12
Balance, July 31, 2014	$	311

Balance, January 31, 2013	$	252
Current period activity		—
Balance, April 30, 2013		252
Current period activity		10
Balance, July 31, 2013	$	262

Fair Value Measurements, Nonrecurring [Table Text Block]

Assets measured at fair value on a non-recurring basis as of January 31, 2014 are summarized below (amounts in thousands):

		Level 1				Level 2				Level 3				Total Losses (1)
Property and equipment, net		$	—			$	—			$	521			$	55

Property and Equipment (Tables)

6 Months Ended

Jul. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

The components of property and equipment at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014			January 31, 2014

Land and improvements	$	21,424		$	21,543
Buildings and improvements		28,304			28,297
Machinery, equipment and fixtures		224,124			223,544
Construction in progress		3,093			693
		276,945			274,077
Less: accumulated depreciation		(79,710	)		(71,819	)

	$	197,235		$	202,258

Other Assets (Tables)

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Other Assets [Table Text Block]

The components of other assets at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Deferred financing costs, net	$	301	$	402
Deposits		964		1,014
Real estate taxes refundable		3,658		3,644
Other		365		328
Total	$	5,288	$	5,388

Accrued Expenses and Other Current Liabilities (Tables)

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Other Current Liabilities [Table Text Block]

The components of accrued expenses and other current liabilities at July 31, 2014 and January 31, 2014 are as follows (amounts in thousands):

	July 31, 2014		January 31, 2014

Accrued utility charges	$	1,655	$	3,745
Accrued income taxes		3,656		—
Accrued payroll and related items		3,453		3,122
Accrued real estate taxes		1,939		2,471
Other		1,769		2,809
Total	$	12,472	$	12,147

Financial Instruments (Tables)

6 Months Ended

Jul. 31, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Notional Amounts and Fair Values of Derivatives Not Designated As Cash Flow Hedges [Table Text Block]

The notional amount and fair value of the derivative, which is not designated as a cash flow hedge at July 31, 2014, are summarized in the table below (amounts in thousands):

	Notional Amount		Fair Value Liability

Interest rate swap	$	31,118	$	371

Stock Option Plans (Tables)

6 Months Ended

Jul. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price [Table Text Block]

The following table summarizes options granted, exercised and canceled or expired during the six months ended July 31, 2014:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at January 31, 2014		83,330		$	12.37
Exercised		(83,330	)	$	12.37
Outstanding and exercisable at July 31, 2014		—		$	—		—	$	—

Income Per Share from Continuing Operations Attributable to REX Common Shareholders (Tables)

6 Months Ended

Jul. 31, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table reconciles the computation of basic and diluted net income per share from continuing operations for the periods presented (in thousands, except per share amounts):

	Three Months Ended						Three Months Ended
	July 31, 2014						July 31, 2013
	Income		Shares		Per Share		Income		Shares		Per Share
Basic income per share from continuing operations attributable to REX common shareholders	$	21,900		8,182	$	2.68	$	5,704		8,164	$	0.70
Effect of stock options		—		—				—		40
Diluted income per share from continuing operations attributable to REX common shareholders	$	21,900		8,182	$	2.68	$	5,704		8,204	$	0.70

	Six Months Ended						Six Months Ended
	July 31, 2014						July 31, 2013
	Income		Shares		Per Share		Income		Shares		Per Share
Basic income per share from continuing operations attributable to REX common shareholders	$	43,633		8,150	$	5.36	$	8,915		8,161	$	1.09
Effect of stock options		—		16				—		43
Diluted income per share from continuing operations attributable to REX common shareholders	$	43,633		8,166	$	5.35	$	8,915		8,204	$	1.09

Investments (Tables)

6 Months Ended

Jul. 31, 2014

Investments And Deposits [Text Block] [Abstract]

Equity Method Investments [Table Text Block]

The following table summarizes equity method investments at July 31, 2014 and January 31, 2014 (amounts in thousands):

Entity	Ownership Percentage		Carrying Amount July 31, 2014		Carrying Amount January 31, 2014

Big River	10	%	$	42,804	$	40,042
Patriot	27	%		35,265		31,147
Total Equity Method Investments			$	78,069	$	71,189

Schedule Of Income Loss Recognized From Equity Method Investments [Table Text Block]

The following table summarizes income recognized from equity method investments for the periods presented (amounts in thousands):

	Three Months Ended July 31,				Six Months Ended July 31,
	2014		2013		2014		2013

Big River	$	4,720	$	2,092	$	9,779	$	2,736
Patriot		2,525		2,536		5,763		3,491
Total	$	7,245	$	4,628	$	15,542	$	6,227

Schedule of Financial Information for Equity Method Investments [Table Text Block]

	Three Months Ended July 31, 2014				Three Months Ended July 31, 2013

	Patriot		Big River		Patriot		Big River

Net sales and revenue	$	79,127	$	312,843	$	102,416	$	335,961
Gross profit	$	11,244	$	40,476	$	11,046	$	30,063
Income from continuing operations	$	9,511	$	48,618	$	9,552	$	21,549
Net income	$	9,511	$	48,618	$	9,552	$	21,549

	Six Months Ended July 31, 2014				Six Months Ended July 31, 2013

	Patriot		Big River		Patriot		Big River

Net sales and revenue	$	159,536	$	593,267	$	196,474	$	630,589
Gross profit	$	25,029	$	124,310	$	16,189	$	45,683
Income from continuing operations	$	21,705	$	100,739	$	13,150	$	28,180
Net income	$	21,705	$	100,739	$	13,150	$	28,180

Income Taxes (Tables)

6 Months Ended

Jul. 31, 2014

Income Tax Disclosure [Abstract]

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands):

Unrecognized tax benefits, January 31, 2014	$	1,862
Changes for prior years’ tax positions		28
Changes for current year tax positions		—
Unrecognized tax benefits, July 31, 2014	$	1,890

Discontinued Operations (Tables)

6 Months Ended

Jul. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

Below is a table reflecting certain items of the Consolidated Condensed Statements of Operations that were reclassified as discontinued operations for the periods indicated (amounts in thousands):

	Three Months Ended						Six Months Ended
	July 31,						July 31,
	2014			2013			2014			2013

Net sales and revenue	$	—		$	500		$	—		$	1,082
Cost of sales		(3	)		214			(18	)		451

Income before income taxes		3			197			18			468
Provision for income taxes		(1	)		(77	)		(7	)		(183	)
Income from discontinued operations, net of tax	$	2		$	120		$	11		$	285
Gain on disposal	$	8		$	2		$	8		$	217
Provision for income taxes		(3	)		(1	)		(3	)		(85	)
Gain on disposal of discontinued operations, net of tax	$	5		$	1		$	5		$	132

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Segment Reporting (Tables)

6 Months Ended

Jul. 31, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information Profit Loss And Revenue Percentage [Table Text Block]

The following table summarizes segment and other results and assets (amounts in thousands):

	Three Months Ended July 31,						Six Months Ended July 31,
	2014			2013			2014			2013
Net sales and revenue:
Alternative energy	$	150,133		$	175,290		$	305,960		$	353,614
Real estate		98			99			207			199
Total net sales and revenues	$	150,231		$	175,389		$	306,167		$	353,813

Segment gross profit (loss):
Alternative energy	$	38,820		$	10,890		$	75,434		$	19,916
Real estate		(2	)		(12	)		9			(40	)
Total gross profit	$	38,818		$	10,878		$	75,443		$	19,876

Segment profit (loss):
Alternative energy	$	41,509		$	11,114		$	80,385		$	17,740
Real estate		(28	)		(74	)		(44	)		(163	)
Corporate expense, net		(761	)		(722	)		(1,514	)		(1,413	)
Income from continuing operations before income taxes and noncontrolling interests	$	40,720		$	10,318		$	78,827		$	16,164

Schedule of Segment Reporting Information Assets [Table Text Block]

	July 31, 2014		January 31, 2014
Assets:
Alternative energy	$	413,883	$	356,589
Real estate		4,141		4,722
Corporate		51,496		66,557
Total assets	$	469,520	$	427,868

Consolidated Condensed Financial Statements (Details)	6 Months Ended
Consolidated Condensed Financial Statements (Details)	Jul. 31, 2014
Disclosure Text Block [Abstract]
Number of Reportable Segments	2

Accounting Policies (Details) - USD ($)	3 Months Ended		6 Months Ended
Accounting Policies (Details) - USD ($)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Building and Building Improvements [Member] \| Minimum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Building and Building Improvements [Member] \| Maximum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Fixtures And Equipment [Member] \| Minimum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Fixtures And Equipment [Member] \| Maximum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Interest Paid	$ 496,000	$ 941,000	$ 1,316,000	$ 1,922,000
Derivative Settlement on Interest Rate Swap	376,000	$ 422,000	774,000	862,000
Income Taxes Paid			18,521,000	$ 0
Unrecognized Tax Benefit	1,451,000		1,451,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	439,000		439,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 24,000		$ 24,000
Property, Plant and Equipment, Depreciation Methods	Depreciation is computed using the straight-line method.
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting	20.00%

Accounting Policies (Details) - Schedule of components of inventory - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Schedule of components of inventory [Abstract]
Ethanol and other finished goods	$ 3,764	$ 3,517
Work in process	2,679	3,017
Grain and other raw materials	10,844	12,836
Total	$ 17,287	$ 19,370

Leases (Details)	Jul. 31, 2014
Leases [Abstract]
Number of Owned Properties Subject to Operating Lease	5

Leases (Details) - Schedule of Future Minimum Rental Payments for Operating Leases $ in Thousands	Jul. 31, 2014 USD ($)
Schedule of Future Minimum Rental Payments for Operating Leases [Abstract]
Remainder of 2015	$ 185
2016	392
2017	349
2018	117
Total	$ 1,043

Fair Value (Details) - USD ($) $ in Millions	Jul. 31, 2014	Jan. 31, 2014
Fair Value Disclosures [Abstract]
Debt Instrument, Fair Value Disclosure	$ 62.0	$ 75.1

Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis - USD ($)
$ in Thousands

Jul. 31, 2014

Jan. 31, 2014

Fair Value, Inputs, Level 1 [Member]

Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]

Investment in cooperative

^[1]

Total assets

122

Cash equivalents

Money market mutual fund (1)

^[1]

120

Fair Value, Inputs, Level 2 [Member]

Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]

Investment in cooperative

^[1]

Interest rate swap derivative liability

371

1,141

Money market mutual fund (1)

^[1]

Fair Value, Inputs, Level 3 [Member]

Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]

Investment in cooperative

^[1]

311

289

Total assets

289

Money market mutual fund (1)

^[1]

Investment in cooperative

^[1]

311

289

Total assets

411

Interest rate swap derivative liability

$ 371

1,141

Cash equivalents

Money market mutual fund (1)

^[1]

$ 120

[1]	The money market mutual fund and the investment in cooperative are included in "Other assets" on the accompanying Consolidated Condensed Balance Sheets.

Fair Value (Details) - Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2014	Apr. 30, 2014	Jul. 31, 2013	Apr. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Balance	$ 311	$ 299	$ 262	$ 252
Fair value adjustment	$ 12	$ 10	$ 10	$ 0

Fair Value (Details) - Assets measured at fair value on a non-recurring basis
$ in Thousands

Apr. 30, 2014

USD ($)

Fair Value, Inputs, Level 1 [Member]

Fair Value (Details) - Assets measured at fair value on a non-recurring basis [Line Items]

Property and equipment, net

Fair Value, Inputs, Level 2 [Member]

Fair Value (Details) - Assets measured at fair value on a non-recurring basis [Line Items]

Property and equipment, net

Fair Value, Inputs, Level 3 [Member]

Fair Value (Details) - Assets measured at fair value on a non-recurring basis [Line Items]

Property and equipment, net

521

Property and equipment, net

$ 55

^[1]

[1]	Total losses include impairment charges and loss on disposal.

Property and Equipment (Details) - Schedule of Property Plant and Equipment - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Schedule of Property Plant and Equipment [Abstract]
Land and improvements	$ 21,424	$ 21,543
Buildings and improvements	28,304	28,297
Machinery, equipment and fixtures	224,124	223,544
Construction in progress	3,093	693
	276,945	274,077
Less: accumulated depreciation	(79,710)	(71,819)
	$ 197,235	$ 202,258

Other Assets (Details) - Schedule of Other Assets - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Schedule of Other Assets [Abstract]
Deferred financing costs, net	$ 301	$ 402
Deposits	964	1,014
Real estate taxes refundable	3,658	3,644
Other	365	328
Total	$ 5,288	$ 5,388

Accrued Expenses and Other Current Liabilities (Details) - Schedule of accrued expenses and other current liabilities - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Schedule of accrued expenses and other current liabilities [Abstract]
Accrued utility charges	$ 1,655	$ 3,745
Accrued income taxes	3,656
Accrued payroll and related items	3,453	3,122
Accrued real estate taxes	1,939	2,471
Other	1,769	2,809
Total	$ 12,472	$ 12,147

Long Term Debt and Interest Rate Swaps (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Nov. 30, 2011	Jul. 31, 2014	Apr. 30, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Jan. 31, 2014	Jul. 31, 2009
Interest Rate Swap One [Member] \| One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Derivative Liability, Notional Amount								$ 50,000,000
Debt Instrument, Basis Spread on Variable Rate		7.90%
Derivative Liability		$ 400,000			$ 400,000		$ 1,100,000
Term Loan [Member] \| Minimum [Member] \| One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		3.20%			3.20%
Debt Instrument Maximum Payment Aggregate		$ 6,000,000			$ 6,000,000
Term Loan [Member] \| Maximum [Member] \| One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Long-term Debt, Excess Cash Flow Principle Payments, Maximum		18,000,000			18,000,000
Term Loan [Member] \| One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Long term debt, quarterly principle payments		2,000,000			2,000,000
Long-term Debt, Gross		32,000,000			32,000,000		39,100,000
Payments of Financing Costs		1,400,000
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries		100,700,000			100,700,000		86,900,000
Term Loan [Member] \| Nu Gen Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Derivative Liability		30,000,000			30,000,000		36,600,000
Proceeds from Bank Debt	$ 55,000,000
Debt Instrument Principal Payments As Percentage Of Annual Excess Cash Flows			20.00%
Revolving Credit Facility [Member] \| One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 10,000,000			10,000,000
Debt Instrument, Maturity Date		Jul. 31, 2015
Debt Instrument, Description of Variable Rate Basis		LIBOR plus 265 basis points
Long-term Line of Credit		$ 0			0		0
Revolving Credit Facility [Member] \| Nu Gen Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Long-term Line of Credit			$ 0				0
Proceeds from Bank Debt	10,000,000						10,000,000
Maximum [Member] \| Nu Gen Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Payments of Financing Costs		600,000
One Earth Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Debt Instrument Refinanced Amount		$ 44,101,000			44,101,000
Debt Instrument Refinanced Amount Interest Rate		LIBOR plus 300 basis points
Long Term Debt Maturities Quarterly Principal Payment Due Beginning Date		Jan. 08, 2014
Debt Instrument, Annual Principal Payment		$ 6,000,000			6,000,000
Derivative Settlement on Interest Rate Swap		400,000
Gain (Loss) on Derivative Instruments, Net, Pretax		$ 5,000
Nu Gen Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]
Debt Instrument Refinanced Amount Interest Rate		LIBOR plus 300 basis points
Debt Instrument, Annual Principal Payment		$ 6,000,000			6,000,000
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries		$ 96,300,000			96,300,000		66,100,000
Proceeds from Bank Debt	$ 65,000,000
Debt Instrument, Frequency of Periodic Payment		20 quarterly payments
Line of Credit Facility, Interest Rate Description		LIBOR plus 275 basis points
Derivative Liability		$ 371,000			371,000		$ 1,141,000
Derivative Settlement on Interest Rate Swap		376,000		$ 422,000	774,000	$ 862,000
Gain (Loss) on Derivative Instruments, Net, Pretax		$ (1,000)		$ (10,000)	$ (5,000)	$ (6,000)

Financial Instruments (Details) - USD ($)	3 Months Ended		6 Months Ended
Financial Instruments (Details) - USD ($)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Disclosure Text Block Supplement [Abstract]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (1,000)	$ (10,000)	$ (5,000)	$ (6,000)

Financial Instruments (Details) - Schedule of Notional Amounts and fair Values - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Interest Rate Swap [Member]
Financial Instruments (Details) - Schedule of Notional Amounts and fair Values [Line Items]
Interest rate swap	$ 31,118
Interest rate swap	371
Interest rate swap	$ 371	$ 1,141

Stock Option Plans (Details) - USD ($) $ in Millions	6 Months Ended
Stock Option Plans (Details) - USD ($) $ in Millions	Jul. 31, 2014	Jul. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 4.0	$ 0.5
Deferred Tax Expense from Stock Options Exercised	$ 0.8	$ 0.2

Stock Option Plans (Details) - Schedule of Share-based Compensation, Stock Options, Activity shares in Thousands	6 Months Ended
	Jul. 31, 2014 USD ($) $ / shares shares
Schedule of Share-based Compensation, Stock Options, Activity [Abstract]
Outstanding at January 31, 2014 \| shares	83,330
Outstanding at January 31, 2014 \| $ / shares	$ 12.37
Exercised \| shares	(83,330)
Exercised \| $ / shares	$ 12.37
Outstanding and exercisable at July 31, 2014 \| shares
Outstanding and exercisable at July 31, 2014 \| $ / shares
Outstanding and exercisable at July 31, 2014
Outstanding and exercisable at July 31, 2014 \| $

Income Per Share from Continuing Operations Attributable to REX Common Shareholders (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Basic income per share from continuing operations attributable to REX common shareholders (in Dollars)	$ 21,900	$ 5,704	$ 43,633	$ 8,915
Basic income per share from continuing operations attributable to REX common shareholders	8,182	8,164	8,150	8,161
Basic income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.70	$ 5.36	$ 1.09
Effect of stock options		40	16	43
Diluted income per share from continuing operations attributable to REX common shareholders (in Dollars)	$ 21,900	$ 5,704	$ 43,633	$ 8,915
Diluted income per share from continuing operations attributable to REX common shareholders	8,182	8,204	8,166	8,204
Diluted income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 2.68	$ 0.70	$ 5.35	$ 1.09

Investments (Details) - USD ($) $ in Millions	6 Months Ended
Investments (Details) - USD ($) $ in Millions	Jul. 31, 2014	Jul. 31, 2013	Jan. 31, 2014
Patriot And Big River [Member]
Investments (Details) [Line Items]
Proportionate Share of Restricted Net Assets	$ 368.0		$ 366.2
Retained Earnings, Undistributed Earnings from Equity Method Investees	39.5		$ 32.6
Proceeds from Equity Method Investment, Dividends or Distributions	$ 8.6	$ 0.2

Investments (Details) - Schedule of Equity Method Investments - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Big River [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity Method Investments, Ownership Percentage	10.00%
Total Equity Method Investments, Carrying Amount	$ 42,804	$ 40,042
Patriot [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity Method Investments, Ownership Percentage	27.00%
Total Equity Method Investments, Carrying Amount	$ 35,265	31,147
Total Equity Method Investments, Carrying Amount	$ 78,069	$ 71,189

Investments (Details) - Schedule of Income Loss Recognized From Equity Method Investment - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Big River [Member]
Investments (Details) - Schedule of Income Loss Recognized From Equity Method Investment [Line Items]
Income Loss From Equity Method Investments	$ 4,720	$ 2,092	$ 9,779	$ 2,736
Patriot [Member]
Investments (Details) - Schedule of Income Loss Recognized From Equity Method Investment [Line Items]
Income Loss From Equity Method Investments	2,525	2,536	5,763	3,491
Income Loss From Equity Method Investments	$ 7,245	$ 4,628	$ 15,542	$ 6,227

Investments (Details) - Schedule of Financial information For Equity Method Investment - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Patriot [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	$ 79,127	$ 102,416	$ 159,536	$ 196,474
Gross profit	11,244	11,046	25,029	16,189
Income from continuing operations	9,511	9,552	21,705	13,150
Net income	9,511	9,552	21,705	13,150
Big River [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	312,843	335,961	593,267	630,589
Gross profit	40,476	30,063	124,310	45,683
Income from continuing operations	48,618	21,549	100,739	28,180
Net income	$ 48,618	$ 21,549	$ 100,739	$ 28,180

Income Taxes (Details)	3 Months Ended		6 Months Ended
Income Taxes (Details)	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent	34.40%	35.80%	35.40%	35.70%

Income Taxes (Details) - Schedule of Unrecognized Tax Benefits Roll Forward $ in Thousands	3 Months Ended
	Jul. 31, 2014 USD ($)
Schedule of Unrecognized Tax Benefits Roll Forward [Abstract]
Unrecognized tax benefits, January 31, 2014	$ 1,862
Changes for prior years’ tax positions	28
Unrecognized tax benefits, July 31, 2014	$ 1,890

Discontinued Operations (Details) - Schedule of Disposal Groups Including Discontinued Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Schedule of Disposal Groups Including Discontinued Operations [Abstract]
Net sales and revenue		$ 500		$ 1,082
Cost of sales	$ (3)	214	$ (18)	451
Income before income taxes	3	197	18	468
Provision for income taxes	(1)	(77)	(7)	(183)
Income from discontinued operations, net of tax	2	120	11	285
Gain on disposal	8	2	8	217
Provision for income taxes	(3)	(1)	(3)	(85)
Gain on disposal of discontinued operations, net of tax	$ 5	$ 1	$ 5	$ 132

Commitments and Contingencies (Details) - One Earth Energy And Nu Gen Energy [Member] lb in Millions, gal in Millions, bu in Millions	3 Months Ended
	Jul. 31, 2014 T lb bu gal
Commitments and Contingencies (Details) [Line Items]
Quantity of Bushels under Forward Purchase Contract \| bu	7.3
Quantity of Ethanol under Sales Commitment \| gal	36.5
Quantity of Distillers Grains Under Sales Commitment \| T	101,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments \| lb	7.1
Supply Commitment Expected Period Of Delivery	They expect to deliver a majority of the ethanol, distillers grains and non-food grade corn oil through October 2014.

Segment Reporting (Details) $ in Millions	6 Months Ended
Segment Reporting (Details) $ in Millions	Jul. 31, 2014 USD ($)
One Earth Energy And Nu Gen Energy [Member]
Segment Reporting (Details) [Line Items]
Cash	$ 101.8
Number of Reportable Segments	2

Segment Reporting (Details) - Schedule of Segment Reporting Information, Profit Loss And Revenue Percentage - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Alternative Energy Segment [Member]
Net sales and revenue:
Net sales and revenues	$ 150,133	$ 175,290	$ 305,960	$ 353,614
Segment gross profit (loss):
Segment gross profit (loss)	38,820	10,890	75,434	19,916
Segment profit (loss):
Segment profit (loss)	41,509	11,114	80,385	17,740
Real Estate Segment [Member]
Net sales and revenue:
Net sales and revenues	98	99	207	199
Segment gross profit (loss):
Segment gross profit (loss)	(2)	(12)	9	(40)
Segment profit (loss):
Segment profit (loss)	(28)	(74)	(44)	(163)
Corporate Segment [Member]
Segment profit (loss):
Segment profit (loss)	(761)	(722)	(1,514)	(1,413)
Net sales and revenues	150,231	175,389	306,167	353,813
Segment gross profit (loss)	38,818	10,878	75,443	19,876
Segment profit (loss)	$ 40,720	$ 10,318	$ 78,827	$ 16,164

Segment Reporting (Details) - Schedule of Segment Reporting Information Assets - USD ($) $ in Thousands	Jul. 31, 2014	Jan. 31, 2014
Alternative Energy Segment [Member]
Assets:
Assets	$ 413,883	$ 356,589
Real Estate Segment [Member]
Assets:
Assets	4,141	4,722
Corporate and Other Segment [Member]
Assets:
Assets	51,496	66,557
Assets	$ 469,520	$ 427,868

Related-Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
One Earth Energy [Member]
Related-Party Transactions (Details) [Line Items]
Costs and Expenses, Related Party	$ 40.4	$ 78.7	$ 85.2	$ 150.4

Subsequent Events (Details) $ in Millions	Aug. 01, 2014 USD ($)
Subsequent Events [Abstract]
Accelerated principal payments	$ 17

Label	Element	Value
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 289,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	$ 252,000