REX American Resources (REX) 10-K 31 Mar 15 2014 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Jan. 31, 2015	Mar. 30, 2015	Jul. 31, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	REX AMERICAN RESOURCES Corp
Document Type	10-K
Current Fiscal Year End Date	-30
Entity Common Stock, Shares Outstanding		7,899,607
Entity Public Float			$569,775,056
Amendment Flag	FALSE
Entity Central Index Key	744187
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	31-Jan-15
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
CURRENT ASSETS:
Cash and cash equivalents	$137,697	$105,149
Restricted cash		500
Accounts receivable	8,794	16,486
Inventory	18,062	19,370
Refundable income taxes	3,019	268
Prepaid expenses and other	5,810	4,891
Deferred taxes - net	2,363	2,146
Total current assets	175,745	148,810
Property and equipment - net	194,447	202,258
Other assets	6,366	5,388
Equity method investments	80,389	71,189
Restricted investments and deposits		223
TOTAL ASSETS	456,947	427,868
CURRENT LIABILITIES:
Current portion of long term debt		12,226
Accounts payable – trade	9,210	6,626
Derivative financial instruments		1,141
Accrued expenses and other current liabilities	10,347	12,147
Total current liabilities	19,557	32,140
LONG TERM LIABILITIES:
Long term debt		63,500
Deferred taxes	42,768	19,613
Other long term liabilities	1,658	1,862
Total long term liabilities	44,426	84,975
REX shareholders’ equity:
Common stock, 45,000 shares authorized, 29,853 shares issued at par	299	299
Paid in capital	144,791	144,051
Retained earnings	444,438	357,101
Treasury stock, 21,954 and 21,753 shares, respectively	-239,557	-222,170
Total REX shareholders’ equity	349,971	279,281
Noncontrolling interests	42,993	31,472
Total equity	392,964	310,753
TOTAL LIABILITIES AND EQUITY	$456,947	$427,868

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Common stock, shares authorized	45,000	45,000
Common stock, shares issued	29,853	29,853
Treasury stock, shares	21,954	21,753

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Net sales and revenue	$572,230,000	$666,045,000	$656,589,000
Cost of sales	430,291,000	601,757,000	642,787,000
Gross profit	141,939,000	64,288,000	13,802,000
Selling, general and administrative expenses	-19,422,000	-17,846,000	-12,546,000
Equity in income of unconsolidated ethanol affiliates	32,229,000	17,175,000	627,000
Interest and other income	369,000	234,000	204,000
Interest expense	-2,074,000	-3,898,000	-4,828,000
Loss on disposal of real estate and property and equipment, net	-238,000		-490,000
Loss on derivative financial instruments	-1,000	-39,000	-370,000
Income (loss) from continuing operations before income taxes	152,802,000	59,914,000	-3,601,000
(Provision) benefit for income taxes	-49,649,000	-20,751,000	1,548,000
Income (loss) from continuing operations	103,153,000	39,163,000	-2,053,000
Income from discontinued operations, net of tax	234,000	325,000	329,000
Gain on disposal of discontinued operations, net of tax	327,000	741,000	136,000
Net income (loss)	103,714,000	40,229,000	-1,588,000
Net income attributable to noncontrolling interests	-16,377,000	-5,156,000	-707,000
Net income (loss) attributable to REX common shareholders	87,337,000	35,073,000	-2,295,000
Weighted average shares outstanding – basic (in Shares)	8,109	8,137	8,272
Basic income (loss) per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$10.70	$4.18	($0.33)
Basic income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$0.03	$0.04	$0.04
Basic income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)	$0.04	$0.09	$0.01
Basic net income (loss) per share attributable to REX common shareholders (in Dollars per share)	$10.77	$4.31	($0.28)
Weighted average shares outstanding – diluted (in Shares)	8,118	8,180	8,272
Diluted income (loss) per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$10.69	$4.16	($0.33)
Diluted income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$0.03	$0.04	$0.04
Diluted income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)	$0.04	$0.09	$0.01
Diluted net income (loss) per share attributable to REX common shareholders (in Dollars per share)	$10.76	$4.29	($0.28)
Amounts attributable to REX common shareholders:
Income (loss) from continuing operations, net of tax	86,776,000	34,007,000	-2,760,000
Income from discontinued operations, net of tax	561,000	1,066,000	465,000
Net income (loss)	$87,337,000	$35,073,000	($2,295,000)

CONSOLIDATED_STATEMENTS_OF_SHA

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2012	$299,000	($215,105,000)	$142,994,000	$324,323,000	$29,332,000	$281,843,000
Balance (in Shares) at Jan. 31, 2012	29,853,000	21,523,000
Net income				-2,295,000	707,000	-1,588,000
Treasury stock acquired		-5,445,000				-5,445,000
Treasury stock acquired (in Shares)		278,000				278,369
Noncontrolling interests distribution and other					-2,108,000	-2,108,000
Stock options and related tax effects		1,000,000	581,000			1,581,000
Stock options and related tax effects (in Shares)		-100,000
Balance at Jan. 31, 2013	299,000	-219,550,000	143,575,000	322,028,000	27,931,000	274,283,000
Balance (in Shares) at Jan. 31, 2013	29,853,000	21,701,000
Net income				35,073,000	5,156,000	40,229,000
Treasury stock acquired		-3,486,000				-3,486,000
Treasury stock acquired (in Shares)		137,000				137,015
Noncontrolling interests distribution and other					-1,615,000	-1,615,000
Stock options and related tax effects		866,000	476,000			1,342,000
Stock options and related tax effects (in Shares)		-85,000
Balance at Jan. 31, 2014	299,000	-222,170,000	144,051,000	357,101,000	31,472,000	310,753,000
Balance (in Shares) at Jan. 31, 2014	29,853,000	21,753,000
Net income				87,337,000	16,377,000	103,714,000
Treasury stock acquired		-18,238,000				-18,238,000
Treasury stock acquired (in Shares)		284,000				283,979
Noncontrolling interests distribution and other					-4,856,000	-4,856,000
Stock options and related tax effects		851,000	740,000			1,591,000
Stock options and related tax effects (in Shares)		-83,000
Balance at Jan. 31, 2015	$299,000	($239,557,000)	$144,791,000	$444,438,000	$42,993,000	$392,964,000
Balance (in Shares) at Jan. 31, 2015	29,853,000	21,954,000

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$103,714,000	$40,229,000	($1,588,000)
Depreciation and amortization	16,787,000	17,284,000	16,602,000
Impairment charges on real estate	68,000	55,000	562,000
Income from equity method investments	-32,229,000	-17,175,000	-627,000
Dividends received from equity method investments	22,889,000	5,804,000	2,206,000
Derivative financial instruments	-1,141,000	-1,648,000	-1,446,000
(Gain) loss on disposal of real estate and property and equipment	-275,000	-1,015,000	357,000
Deferred income tax	22,473,000	15,987,000	-504,000
Excess tax benefit from stock option exercises	-441,000	-64,000
Changes in assets and liabilities:
Accounts receivable	7,692,000	-4,919,000	1,217,000
Inventory	1,308,000	5,549,000	5,430,000
Prepaid expenses and other assets	-1,929,000	-1,490,000	498,000
Income taxes refundable	-1,985,000	1,480,000	719,000
Accounts payable-trade	2,030,000	1,721,000	-1,448,000
Accrued expenses and other liabilities	-1,745,000	2,637,000	-4,930,000
Net cash provided by operating activities	137,216,000	64,435,000	17,048,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	-9,927,000	-3,518,000	-3,684,000
Repayment of note receivable	6,000	681,000
Proceeds from sale of real estate and property and equipment	1,778,000	8,876,000	2,849,000
Restricted cash	500,000	-500,000
Restricted investments and deposits	323,000	1,293,000	860,000
Net cash (used in) provided by investing activities	-7,320,000	6,832,000	25,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of long term debt	-75,726,000	-31,203,000	-16,820,000
Stock options exercised	931,000	1,072,000	265,000
Payments to noncontrolling interests holders	-4,856,000	-1,638,000	-2,085,000
Excess tax benefit from stock option exercises	441,000	64,000
Treasury stock acquired	-18,138,000	-3,486,000	-4,373,000
Net cash used in financing activities	-97,348,000	-35,191,000	-23,013,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	32,548,000	36,076,000	-5,940,000
CASH AND CASH EQUIVALENTS-Beginning of year	105,149,000	69,073,000	75,013,000
CASH AND CASH EQUIVALENTS-End of year	137,697,000	105,149,000	69,073,000
Non cash financing activities-Cashless exercises of stock options	100,000		1,071,000
Non cash investing activities-Accrued capital expenditures	804,000	250,000
Non cash financing activities-Accrued noncontrolling interest holders payments			23,000
Non cash investing activities- Loan receivable granted in connection with sale of real estate	$475,000

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Jan. 31, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Principles of Consolidation – The accompanying financial statements consolidate the operating results and financial position of Rex American Resources Corporation and its wholly-owned and majority owned subsidiaries (the “Company” or “REX”). All intercompany balances and transactions have been eliminated. As of January 31, 2015, the Company owns interests in four ethanol entities – two are consolidated and two are accounted for using the equity method of accounting. The Company operates in one reportable segment, alternative energy. The Company completed the exit of its retail business during fiscal year 2009 and recognized, in discontinued operations, revenue and expense associated with administering extended service policies.
	Fiscal Year – All references in these consolidated financial statements to a particular fiscal year are to the Company’s fiscal year ended January 31. For example, “fiscal year 2014” means the period February 1, 2014 to January 31, 2015. The Company refers to its fiscal year by reference to the year immediately preceding the January 31 fiscal year end date.
	Segments – Beginning in the fourth quarter of fiscal year 2014, the Company has realigned its reportable business segments to be consistent with its management reporting and changes to the nature of ongoing operations. The Company now has one reportable segment, alternative energy. As the Company continues to dispose of assets that were historically reported in its former real estate segment, results of those operations have become insignificant. Prior year amounts have been reclassified to conform to the current year segment reporting. In applying the criteria set forth in ASC 280 “Segment Reporting”, the Company determined that based on the nature of the products and production process and the expected financial results, the Company’s operations at its ethanol plants are aggregated into one reporting segment.
	Use of Estimates – The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
	Cash Equivalents – Cash equivalents are principally short-term investments with original maturities of less than three months. The carrying amount of cash equivalents approximates fair value.
	Concentrations of Risk –The Company maintains cash and cash equivalents in accounts with financial institutions which exceed federally insured limits. The Company has not experienced any losses in such accounts. The Company does not believe there is significant credit risk related to its cash and cash equivalents. Four customers accounted for approximately 74%, 82% and 81% of the Company’s net sales and revenue during fiscal years 2014, 2013 and 2012, respectively. At January 31, 2015 and 2014, these customers represented approximately 76% and 91%, respectively, of the Company’s accounts receivable balance. These customers (in fiscal year 2014) were Archer Daniels Midland Company, Biourja Trading, LLC, CHS, Inc. and United Bio Energy, LLC.
	Inventory – Inventories are carried at the lower of cost or market on a first-in, first-out basis. Inventory includes direct production costs and certain overhead costs such as depreciation, property taxes and utilities related to producing ethanol and related co-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 significant write-down of inventory at January 31, 2015 or 2014. Fluctuations in the write-down of inventory generally relate to the levels and composition of such inventory at a given point in time and commodity prices. The components of inventory at January 31, 2015, and January 31, 2014 are as follows (amounts in thousands):
		2015			2014
	Ethanol and other finished goods	$	3,039		$	3,517
	Work in process		2,609			3,017
	Grain and other raw materials		12,414			12,836
	Total	$	18,062		$	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. The components of property and equipment at January 31, 2015 and 2014 are as follows (amounts in thousands):
		2015			2014
	Land and improvements	$	20,844		$	21,543
	Buildings and improvements		27,069			28,297
	Machinery, equipment and fixtures		231,422			223,544
	Construction in progress		1,290			693
			280,625			274,077
	Less: accumulated depreciation		(86,178	)		(71,819	)
		$	194,447		$	202,258
	In accordance with ASC 360-05 “Impairment or Disposal of Long-Lived Assets”, the carrying value of long-lived assets is assessed for recoverability by management when changes in circumstances indicate that the carrying amount may not be recoverable, based on an analysis of undiscounted future expected cash flows from the use and ultimate disposition of the asset. The Company recorded impairment charges of $68,000 and $55,000 in fiscal years 2014 and 2013, respectively, all of which is included in discontinued operations in the Consolidated Statements of Operations. The Company recorded an impairment charge of $562,000 in fiscal year 2012, of which $13,000 is included in cost of sales and $549,000 is classified as discontinued operations in the Consolidated Statements of Operations. These impairment charges are primarily related to unfavorable changes in real estate conditions in local markets. Impairment charges result from the Company’s management performing cash flow analysis and represent management’s estimate of the excess of net book value over fair value. Given the nature of the Company’s business, events and changes in circumstances include, but are not limited to, a significant decline in estimated future cash flows, a sustained decline in market prices for similar assets or a significant adverse change in legal or regulatory factors or the business climate. A significant decline in estimated future cash flows is represented by a greater than 25% annual decline in expected future cash flows (for real estate asset groups) or a change in the spread between ethanol and grain prices that would result in greater than six consecutive months of estimated or actual significant negative cash flows (for alternative energy asset groups).
	The Company tests for recoverability of an asset group by comparing its carrying amount to its estimated undiscounted future cash flows. If the carrying amount of an asset group exceeds its estimated undiscounted future cash flows, the Company recognizes an impairment charge for the amount by which the asset group’s carrying amount exceeds its fair value, if any. The Company generally determines the fair value of the asset group using a discounted cash flow model based on market participant assumptions (for income producing asset groups) or by obtaining appraisals based on the market approach and comparable market transactions (for non-income producing asset groups).
	For real estate assets, each individual real estate property represents the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. As such, the Company separately tests individual real estate properties for recoverability. Real estate assets include both income producing and non-income producing asset groups.
	For alternative energy assets, each individual ethanol plant represents the lowest level for which identifiable cash flows are independent of the cash flows of other assets and liabilities. As such, the Company separately tests individual ethanol plants for recoverability. In addition to the general events and changes in circumstances noted above that indicate that an asset group may not be recoverable, the Company also considers the following events as indicators: (i) the decision to suspend operations at a plant for at least a six month period; or (ii) an expected or actual failure to maintain compliance with debt covenants at our ethanol plants. Alternative energy assets include only income producing asset groups.
	Depreciation expense was approximately $16,387,000, $16,915,000 and $16,081,000 in fiscal years 2014, 2013 and 2012, respectively.
	Investments and Deposits – 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 lag as One Earth has a fiscal year end of December 31. NuGen has the same fiscal year as the parent, and therefore, there is no lag in reporting the results of NuGen. 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.
	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 Statements of Operations and a new cost basis in the investment is established.
	Revenue Recognition – The Company recognizes sales from the production of ethanol, distillers grains and non-food grade corn oil when title transfers to customers, generally upon shipment from the ethanol plant or upon loading of the rail car used to transport the products. Shipping and handling charges billed to customers are included in net sales and revenue.
	Costs of Sales – 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.
	Selling, General and Administrative Expenses –The Company includes non-production related costs such as professional fees and certain payroll in selling, general and administrative expenses.
	Interest Expense – Cash paid for interest in fiscal years 2014, 2013 and 2012 was approximately $2,136,000, $3,492,000 and $4,449,000, respectively.
	Financial Instruments – The Company used 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 agreements were not designated for hedge accounting pursuant to ASC 815. The interest rate swaps were recorded at their fair values and the changes in fair values were recorded as gain or loss on derivative financial instruments in the Consolidated Statements of Operations. The Company paid settlements of interest rate swaps of approximately $1,142,000, $1,687,000 and $1,816,000 in fiscal years 2014, 2013 and 2012, respectively.
	Forward grain purchase and ethanol and distillers grains 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 and sales of ethanol in quantities expected to be produced over a reasonable period of time in the normal course of business.
	Stock Compensation – 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 were granted in the fiscal years ended January 31, 2015, January 31, 2014 or January 31, 2013. The following table summarizes options granted, exercised and canceled or expired during the fiscal year ended January 31, 2015:
		Shares			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding—Beginning of year		84		$	12.37
	Granted		—			—
	Exercised		(84	)		12.37
	Canceled or expired		—			—
	Outstanding and exercisable—End of year		—		$	—
	The total intrinsic value of options exercised in the fiscal years ended January 31, 2015, 2014 and 2013, was approximately $4.0 million, $1.1 million and $1.8 million, respectively, resulting in tax deductions to realize benefits of approximately $0.8 million, $0.4 million and $0.2 million, respectively. At January 31, 2015: (i) there were no outstanding stock options; and (ii) there was no unrecognized compensation cost related to nonvested stock options. See Note 11 for a further discussion of stock options.
	Income Taxes – 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 bases 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.
	Discontinued Operations – The Company classifies sold real estate assets in discontinued operations when the operations and cash flows of the real estate assets have been (or will be) eliminated from ongoing operations and when the Company will not have any significant continuing involvement in the operation of the real estate after disposal. To determine if cash flows had been or would be eliminated from ongoing operations, the Company evaluates a number of qualitative and quantitative factors. For purposes of reporting the operations of real estate assets meeting the criteria for discontinued operations, the Company reports net sales and revenue, gross profit and related selling, general and administrative expenses that are specifically identifiable to those assets as discontinued operations. Certain corporate level charges, such as general office expense, certain interest expense, and other “fixed” expenses are not allocated to discontinued operations because the Company believes that these expenses were not specific to components’ operations.
	Comprehensive Income – The Company has no components of other comprehensive income, and therefore, comprehensive income equals net income.
	New Accounting Pronouncements – Effective February 1, 2014, the Company adopted ASU 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. The Company has not determined the impact of adopting ASU 2014-08 on its 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 its consolidated financial statements.

INVESTMENTS_AND_DEPOSITS

INVESTMENTS AND DEPOSITS	12 Months Ended
	Jan. 31, 2015
Investments And Deposits [Abstract]
Investments And Deposits [Text Block]	2. INVESTMENTS AND DEPOSITS
	The Company’s equity investments are accounted for under ASC 323 “Investments-Equity Method and Joint Ventures”. The following table summarizes equity method investments at January 31, 2015 and 2014 (amounts in thousands):
	Entity	Ownership			Carrying		Carrying
		Percentage			Amount		Amount
					January 31,		January 31,
					2015		2014
	Big River Resources, LLC		10	%	$	40,188	$	40,042
	Patriot Holdings, LLC		27	%		40,201		31,147
	Total Equity Method Investments				$	80,389	$	71,189
	The Company invested $20.0 million in Big River, a holding company for several entities, for a 10% ownership interest. Big River Resources West Burlington, LLC, a wholly owned subsidiary of Big River, operates an ethanol manufacturing plant in West Burlington, Iowa. During fiscal year 2014, the plant shipped 108 million gallons of ethanol. The plant has been in operation since 2004. Big River Resources Galva, LLC, a wholly owned subsidiary of Big River, operates an ethanol manufacturing plant in Galva, Illinois. During fiscal year 2014, the plant shipped 119 million gallons of ethanol. The plant has been in operation since 2009. Big River Resources United Energy, LLC, a 50.5% owned subsidiary of Big River, operates an ethanol manufacturing plant in Dyersville, Iowa. During fiscal year 2014, the plant shipped 125 million gallons of ethanol. Big River acquired its interest in this plant in 2009. Big River Resources Boyceville, LLC, a wholly owned subsidiary of Big River operates an ethanol manufacturing plant in Boyceville, Wisconsin. During fiscal year 2014, the plant shipped 58 million gallons of ethanol. Big River acquired its interest in this plant in 2011. The Company recorded income of approximately $18.2 million, $8.8 million and $0.3 million as its share of earnings from Big River during fiscal years 2014, 2013 and 2012, respectively. The Company received dividends of approximately $18.0 million, $1.2 million and $2.2 million from Big River during fiscal years 2014, 2013 and 2012, respectively. At January 31, 2015, the carrying value of the investment in Big River is approximately $40.2 million; the amount of underlying equity in the net assets of Big River is approximately $40.7 million.
	The Company invested $17.9 million in Patriot for a 27% ownership interest. Patriot operates an ethanol manufacturing plant in Annawan, Illinois. During fiscal year 2014, the plant shipped 126 million gallons of ethanol. The plant has been in operation since 2008. The Company recorded income of approximately $14.0 million, $8.4 million and $0.4 million as its share of earnings from Patriot during fiscal years 2014, 2013 and 2012, respectively. The Company received dividends of approximately $4.9 million and $4.6 million from Patriot during fiscal years 2014 and 2013, respectively. The Company received no dividends from Patriot during fiscal year 2012. At January 31, 2015, the carrying value of the investment in Patriot is approximately $40.2 million; the amount of underlying equity in the net assets of Patriot is approximately $38.9 million. The excess of the carrying value of the investment over the underlying equity in the net assets is accounted for as goodwill and capitalized interest and is recorded within equity method investments on the accompanying Consolidated Balance Sheets. Capitalized interest is amortized as a basis difference over the life of the asset.
	Undistributed earnings of equity method investees totaled approximately $41.9 million and $32.6 million at January 31, 2015 and 2014, respectively.
	Summarized financial information for each of the Company’s equity method investees, as of their fiscal year end is presented in the following table (amounts in thousands):
	As of December 31, 2014
		Patriot			Big River
	Current assets	$	56,272		$	180,186
	Non current assets		158,828			343,182
	Total assets	$	215,100		$	523,368
	Current liabilities	$	19,205		$	57,130
	Long-term liabilities		49,542			—
	Total liabilities	$	68,747		$	57,130
	Noncontrolling interests	$	—		$	46,913
	As of December 31, 2013
		Patriot			Big River
	Current assets	$	26,540		$	164,278
	Non current assets		159,081			348,884
	Total assets	$	185,621		$	513,162
	Current liabilities	$	16,034		$	68,769
	Long-term liabilities		57,847			12,503
	Total liabilities	$	73,881		$	81,272
	Noncontrolling interests	$	—		$	45,045
	Summarized financial information for each of the Company’s equity method investees is presented in the following table for the years ended December 31, 2014, 2013 and 2012 (amounts in thousands):
	Year Ended December 31, 2014
		Patriot			Big River
	Net sales and revenue	$	331,260		$	1,184,505
	Gross profit	$	59,980		$	241,963
	Income from continuing operations	$	52,875		$	187,388
	Net income	$	52,875		$	187,388
	Year Ended December 31, 2013
		Patriot			Big River
	Net sales and revenue	$	377,532		$	1,292,120
	Gross profit	$	37,411		$	124,327
	Income from continuing operations	$	31,518		$	90,729
	Net income	$	31,518		$	90,729
	Year Ended December 31, 2012
		Patriot			Big River
	Net sales and revenue	$	365,302		$	1,135,956
	Gross profit	$	7,685		$	20,651
	Income from continuing operations	$	1,320		$	2,799
	Net income	$	1,320		$	2,799
	Patriot and Big River have debt agreements that limit and restrict amounts the entities can pay in the form of dividends or advances to owners. The restricted net assets of Patriot and Big River combined at January 31, 2015 are approximately $421.9 million. At January 31, 2015, the Company’s proportionate share of restricted net assets of Patriot and Big River combined is approximately $57.7 million.

FAIR_VALUE

FAIR VALUE	12 Months Ended
	Jan. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	3. FAIR VALUE
	The Company applies ASC 820, which 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, which 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 certain cash equivalents, investments and derivative liabilities at fair value.
	The fair values of derivative assets and liabilities traded in the over-the-counter market are determined using quantitative models that require the use of multiple market inputs including interest rates, prices and indices to generate pricing and volatility factors, which are used to value the position. The predominance of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services. 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 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 value of derivative assets and liabilities and property and equipment, various processes and controls have been adopted, which include: (i) model validation that requires a review and approval for pricing, financial statement fair value determination and risk quantification; and (ii) periodic review and substantiation of profit and loss reporting for all derivative instruments. Financial assets and liabilities measured at fair value at January 31, 2015 on a recurring basis are summarized below (amounts in thousands):
			Level 1		Level 2		Level 3		Total
									Fair
									Value
	Investment in Cooperative Asset (1)		$	—	$	—	$	333	$	333
	Financial assets and liabilities measured at fair value at January 31, 2014 on a recurring basis are summarized below (amounts in thousands):
			Level 1		Level 2		Level 3		Total
									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 Liabilities		$	—	$	1,141	$	—	$	1,141
		(1) The money market mutual fund is included in “Restricted investments and deposits” and the investment in cooperative is included in “Other assets” on the accompanying Consolidated Balance Sheets.
	The following table provides a reconciliation of the activity related to assets measured at fair value on a recurring basis using Level 3 inputs (amounts in thousands):
			Investment in
			Cooperative
	Balance, January 31, 2013		$	252
	Fair value adjustment			37
	Balance, January 31, 2014			289
	Fair value adjustment			44
	Balance, January 31, 2015		$	333
	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.
	No other financial instruments were elected to be measured at fair value in accordance with ASC 470-20-25-21.
	The Company reviews its long-lived assets for impairment on at least an annual basis based on the carrying value of these assets. As a result of vacancies at owned real estate locations, the Company tested certain long-lived assets for impairment using a fair value measurement approach. The fair value measurement approach utilizes a number of significant unobservable inputs or Level 3 assumptions. These assumptions include, among others, the implied fair value of these assets using an income approach by preparing a discounted cash flow analysis and the implied fair value of these assets using recent sales data of comparable properties, and other subjective assumptions. Upon completion of its impairment analysis, which was performed at various times throughout fiscal year 2014, the Company determined that the carrying value of certain long-lived assets exceeded the fair value of these assets. Accordingly, in fiscal year 2014, the Company recorded long-lived asset impairment charges of approximately $68,000. There were no assets measured at fair value at January 31, 2015 on a non-recurring basis.
	Assets measured at fair value at January 31, 2014 on a non-recurring basis are summarized below (amounts in thousands):
			Year Ended		Level 1		Level 2		Level 3		Total
			31-Jan-14								Losses
	Property and equipment, net		$	521	$	—	$	—	$	521	$	55

OTHER_ASSETS

OTHER ASSETS	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Other Assets Disclosure [Text Block]	4. OTHER ASSETS
	The components of other noncurrent assets at January 31, 2015 and 2014 are as follows (amounts in thousands):
		January 31,
		2015		2014
	Deferred financing costs, net	$	—	$	402
	Deposits		914		1,014
	Real estate taxes refundable		4,395		3,644
	Other		1,057		328
	Total	$	6,366	$	5,388
	Real estate taxes refundable represent amounts due One Earth associated with refunds of previously paid taxes in connection with a tax increment financing arrangement with local taxing authorities. Deposits are with vendors and governmental authorities involved in the ethanol industry.

ACCRUED_EXPENSES_AND_OTHER_CUR

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	5. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES
	The components of accrued expenses and other current liabilities at January 31, 2015 and 2014 are as follows (amounts in thousands):
		January 31,
		2015		2014
	Accrued utility charges	$	3,085	$	3,745
	Accrued income taxes		—		615
	Accrued payroll and related items		3,798		3,122
	Accrued real estate taxes		2,507		2,471
	Other		957		2,194
	Total	$	10,347	$	12,147

NET_INCOME_PER_SHARE_FROM_CONT

NET INCOME PER SHARE FROM CONTINUING OPERATIONS	12 Months Ended
	Jan. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	6. NET INCOME PER SHARE FROM CONTINUING OPERATIONS
	The Company reports net income per share in accordance with ASC 260, “Earnings per Share”. Basic net income per share is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the year. Diluted net income per share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding and dilutive common share equivalents during the year. Common share equivalents for each year include the number of shares issuable upon the exercise of outstanding options, less the shares that could be purchased under the treasury stock method. For fiscal years 2014 and 2013, all shares subject to outstanding options were dilutive.
	As there was a loss from continuing operations in fiscal year 2012, basic loss per share from continuing operations equals diluted loss per share from continuing operations. For fiscal year 2012, a total of 168,755 shares subject to outstanding options were not included in the common equivalent shares outstanding calculation as the effect from these shares was antidilutive. The following table reconciles the basic and diluted net income per share amounts from continuing operations computations for each year presented for fiscal years 2014 and 2013 (amounts in thousands, except per-share amounts):
		2014
		Income		Shares		Per Share
	Basic net income per share from continuing operations attributable to REX common shareholders	$	86,776		8,109	$	10.7
	Effect of stock options				9
	Diluted net income per share from continuing operations attributable to REX common shareholders	$	86,776		8,118	$	10.69
		2013
		Income		Shares		Per Share
	Basic net income per share from continuing operations attributable to REX common shareholders	$	34,007		8,137	$	4.18
	Effect of stock options				43
	Diluted net income per share from continuing operations attributable to REX common shareholders	$	34,007		8,180	$	4.16

LEASES

LEASES	12 Months Ended
	Jan. 31, 2015
Leases [Abstract]
Leases of Lessor Disclosure [Text Block]	7. LEASES
	At January 31, 2015, the Company has lease agreements, as landlord, for four owned properties. All of the leases are accounted for as operating leases. The Company recognized lease revenue of approximately $341,000, $420,000 and $422,000 in fiscal years 2014, 2013 and 2012, respectively. As of January 31, 2015, future minimum annual rentals on such leases are as follows (amounts in thousands):
	Years Ended		Minimum
	January 31,		Rentals
		2016	$	296
		2017		253
		2018		115
		2019		72
		2020		72
		Thereafter		329
			$	1,137

COMMON_STOCK

COMMON STOCK	12 Months Ended
	Jan. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	8. COMMON STOCK
	During fiscal years 2014, 2013 and 2012, the Company purchased 283,979 shares, 137,015 shares and 278,369 shares, respectively, of its common stock for approximately $18,238,000, $3,486,000 and $5,445,000, respectively. Included in these amounts are shares the Company received totaling 1,555 and 32,935 for the years ended January 31, 2015, and 2013 respectively, as tenders of the exercise price of stock options exercised by certain officers and directors of the Company. The cost of these shares, determined as the fair market value on the date they were tendered, was approximately $100,000 and $1,071,000 for the years ended January 31, 2015 and, 2013, respectively. At January 31, 2015, the Company had prior authorization by its Board of Directors to purchase, in open market transactions, an additional 497,582 shares of its common stock. Information regarding the Company’s common stock is as follows (amounts in thousands):
		January 31,	January 31,
		2015	2014
	Authorized shares	45,000	45,000
	Issued shares	29,853	29,853
	Outstanding shares	7,900	8,100

LONGTERM_DEBT_AND_INTEREST_RAT

LONG-TERM DEBT AND INTEREST RATE SWAPS	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block [Abstract]
Long-term Debt [Text Block]	9. LONG-TERM DEBT AND INTEREST RATE SWAPS
	Long-term debt consisted of notes payable secured by certain land, buildings and equipment. Interest rates ranged from 3.15% to 4.00% in fiscal years 2014 and 2013. During fiscal year 2014, the Company made principal payments of approximately $75.7 million which paid off all amounts due related to long-term debt. During fiscal year 2014, the Company also terminated One Earth’s and NuGen’s long-term debt and revolving debt agreements. The following provides information on rates segregated as fixed or variable and by term:
		January 31, 2014
			Balance
	Interest Rates	Maturity	(in thousands)
	3.24% - 4.00%	Variable		$	75,726
		Within five years
	3.24% - 4.00%	Variable		$	75,726
		Within five years
	The fair value of the Company’s long-term debt at January 31, 2014 was approximately $75.1 million. The fair value was estimated using a Level 2 discounted cash flow analysis and the Company’s estimate of market rates of interest for similar loan agreements.
	One Earth entered into two forward interest rate swaps in the notional amounts of $50.0 million and $25.0 million with the First National Bank of Omaha. The swap settlements commenced as of July 31, 2009; the $50.0 million swap terminated on July 8, 2014 and the $25.0 million swap terminated on July 31, 2011. The $50.0 million swap fixed a portion of the variable interest rate of the term loan subsequent to the plant completion date at 7.9% while the $25.0 million swap fixed the rate at 5.49%. At January 31, 2014, One Earth recorded a liability of approximately $1.1 million related to the fair value of the remaining swap. The change in fair value is recorded in the Consolidated Statements of Operations.

FINANCIAL_INSTRUMENTS

FINANCIAL INSTRUMENTS	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Financial Instruments Disclosure [Text Block]	10. FINANCIAL INSTRUMENTS
	The Company used an interest rate swap to manage its interest rate exposure at One Earth by fixing the interest rate on a portion of the 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. As the interest rate swap terminated on July 8, 2014, there is no related notional or fair value at January 31, 2015. As of January 31, 2014, the notional value of the interest rate swap was approximately $33.4 million. At January 31, 2014, the Company has recorded a liability of approximately $1.1 million related to the fair value of the interest rate swap. The change in fair value was recorded in the Consolidated Statements of Operations. The notional amount and fair value of the derivative, which is not designated as a cash flow hedge at January 31, 2014 is summarized in the table below (amounts in thousands):
		Notional		Fair Value
		Amount		Liability
	Interest rate swap	$	33,444	$	1,141
	As the interest rate swap was not designated as a cash flow hedge, the realized and unrealized gains and losses on the derivative instruments is reported in current earnings. The Company reported losses of approximately $1,000, $39,000 and $370,000, in fiscal years 2014, 2013 and 2012, respectively.
	Swap settlement payments to the counterparty totaled approximately $1,142,000, $1,687,000 and $1,816,000 in fiscal years 2014, 2013 and 2012, respectively.

EMPLOYEE_BENEFITS

EMPLOYEE BENEFITS	12 Months Ended
	Jan. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	11. EMPLOYEE BENEFITS
	Stock Option Plans – The Company maintains the REX American Resources Corporation 1995 Omnibus Stock Incentive Plan and the REX American Resources Corporation 1999 Omnibus Stock Incentive Plan (the “Omnibus Plans”). Under the Omnibus Plans, the Company may grant to officers and key employees awards in the form of non-qualified stock options, stock appreciation rights, restricted stock, other stock-based awards and cash incentive awards. The Omnibus Plans also provide for yearly grants of non-qualified stock options to directors who are not employees of the Company. The exercise price of each option must be at least 100% of the fair market value of the Company’s common stock on the date of grant. A maximum of 4,500,000 shares of common stock are authorized for issuance under each of the Omnibus Plans. On January 31, 2015, 108,011 and 2,302,425 shares remain available for issuance under the 1995 and 1999 Plans, respectively. No awards under the Omnibus Plans have been awarded since fiscal year 2004 and there are no outstanding awards at January 31, 2015. The following summarizes stock option activity for fiscal years 2014, 2013 and 2012 (amounts in thousands, except per-share amounts):
		2014					2013					2012
		Shares			Weighted		Shares			Weighted		Shares			Weighted
		(000’s)			Average		(000’s)			Average		(000’s)			Average
					Exercise					Exercise					Exercise
					Price					Price					Price
	Outstanding—Beginning of year		84		$	12.37		169		$	12.46		269		$	13.15
	Exercised		(84	)		12.37		(85	)		12.55		(100	)		14.3
	Canceled or expired		—			—		—			—		—			—
	Outstanding—End of year		—					84		$	12.37		169		$	12.46
	Exercisable—End of year		—					84		$	12.37		169		$	12.46

COMMITMENTS

COMMITMENTS	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Commitments Disclosure [Text Block]	12. COMMITMENTS
	One Earth and NuGen have combined forward purchase contracts for approximately 10.0 million bushels of corn, the principal raw material for their ethanol plants. They expect to take delivery of the corn through July 2015.
	One Earth and NuGen have combined sales commitments for approximately 50.2 million gallons of ethanol, 126,000 tons of distillers grains and 6.8 million pounds of non-food grade corn oil. They expect to deliver the ethanol, distillers grains and corn oil through April 2015.
	Forward grain purchase, ethanol, distillers grains and non-food grade corn oil sale contracts are accounted for under the “normal purchases and normal sales” scope exemption of the accounting standards because these arrangements are for purchases of grain and sales of ethanol, distillers grains and corn oil that will be delivered in quantities expected to be used by One Earth and NuGen over a reasonable period of time in the normal course of business.
	One Earth has entered into an agreement with an unrelated party for the use of a portion of the party’s natural gas pipeline. The term of the agreement is 10 years, and the amount is $4,380,000, which is paid over 120 equal monthly installments of $36,500. Payments began in February 2009. One Earth paid approximately $438,000 pursuant to the lease in each of fiscal years 2014, 2013 and 2012.
	One Earth has entered into agreements with unrelated parties for the lease of railcars that will be used to ship ethanol. These leases expire on various dates through May 31, 2022. One Earth pays a monthly lease amount per railcar. One Earth paid approximately $2,572,000, $2,055,000 and $1,723,000 pursuant to the lease in fiscal years 2014, 2013 and 2012, respectively.
	One Earth has a contract with an unrelated party (“Distillers Grains Marketer”) for distillers grains marketing services. Under the terms of the contract, the Distillers Grains Marketer will purchase all of One Earth’s distillers grains production during the term of the contract. The contract called for One Earth to pay a fee per ton of distillers grains for the Distillers Grains Marketer’s services. The term of the agreement expires July 1, 2015 and shall renew automatically for additional one year terms, unless either party sends notice to the other party of its intent to terminate the agreement at least 90 days prior to the expiration of the then current term of the agreement. One Earth incurred fees of approximately $613,000, $640,000 and $627,000 in fiscal years 2014, 2013 2012, respectively, for these marketing services.
	One Earth has a grain origination agreement with Alliance Grain, a minority equity owner, under which it purchased 100% of its grain during fiscal years 2014, 2013 and 2012. One Earth pays to Alliance Grain a certain amount per bushel for procurement fees. The term of the agreement expires October 31, 2015, and shall renew automatically for additional one year terms, unless either party sends notice to the other party of its intent to terminate the agreement at least 180 days prior to the expiration of the then current term of the agreement.
	NuGen has entered into agreements with unrelated parties for the lease of railcars that will be used to ship ethanol and distillers grains. These leases expire on various dates through September 30, 2022. NuGen pays a monthly lease amount per railcar. NuGen paid approximately $4,452,000, $4,350,000 and $2,714,000 pursuant to the leases in fiscal years 2014, 2013 and 2012, respectively.
	NuGen has a contract with an unrelated party (“Distillers Grains Marketer”) for distillers grains marketing services. Under the terms of the contract, the Distillers Grains Marketer will purchase all of NuGen’s distillers grains production during the term of the contract. The contract requires NuGen to pay the marketer an agreed upon fee as defined in the agreement with a minimum cost per ton. NuGen incurred fees of approximately $577,000 $838,000 and $833,000 in fiscal years 2014, 2013 and 2012, respectively. The termination date of the contract is July 31, 2015.

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	13. INCOME TAXES
	The provision (benefit) for income taxes from continuing operations for fiscal years 2014, 2013 and 2012 consists of the following (amounts in thousands):
		2014			2013			2012
	Federal:
	Current	$	23,452		$	2,974		$	—
	Deferred		20,717			15,402			(1,518	)
			44,169			18,376			(1,518	)
	State and Local:
	Current		3,536			2,154			—
	Deferred		1,944			221			(30	)
			5,480			2,375			(30	)
	Provision (benefit) for income taxes	$	49,649		$	20,751		$	(1,548	)
	The tax effects of significant temporary differences representing deferred tax assets and liabilities are as follows as of January 31, 2015 and 2014 (amounts in thousands):
		January 31,
		2015			2014
	Assets:
	Accrued liabilities	$	664		$	331
	Stock based compensation		—			185
	AMT credit carryforward		4,015			19,751
	Alcohol fuels tax credit		—			546
	State net operating loss carryforward		1,343			2,833
	Other items		624			396
	Valuation allowance		(1,752	)		(2,017	)
	Total		4,894			22,025
	Liabilities:
	Basis in pass through entities, including depreciation		(44,783	)		(39,195	)
	Other		(516	)		(297	)
	Total		(45,299	)		(39,492	)
	Net deferred tax liability	$	(40,405	)	$	(17,467	)
	The Company has approximately $4.0 million and $19.8 million of AMT credit carryforwards as of January 31, 2015 and 2014, respectively. The AMT credit carryforwards can be used to offset future regular income tax liabilities subject to certain limitations. The AMT credit carryforwards have no expiration date. The Company must generate approximately $27 million in future taxable income to fully utilize the AMT credit carryforward.
	The Company has state net operating loss carryforwards of approximately $18.0 million, net of the federal benefit, which will begin to expire in fiscal year 2019.
	The Company has a valuation allowance of approximately $1,752,000 at January 31, 2015. The Company decreased the valuation allowance by $265,000 in fiscal year 2014 and increased the valuation allowance by $126,000 and $215,000 in fiscal years 2013, and 2012, respectively. These adjustments to the valuation allowance are a result of estimates of realizing certain future state tax benefits and federal capital loss carryforwards.
	The Company paid income taxes of approximately $30,142,000, $3,450,000 and $51,000 in fiscal years 2014, 2013 and 2012, respectively. The Company received refunds of income taxes of approximately $53,000, $38,000 and $1,005,000 in fiscal years 2014, 2013 and 2012, respectively.
	The effective income tax rate on consolidated pre-tax income or loss differs from the federal income tax statutory rate for fiscal years 2014, 2013 and 2012 as follows:
		2014			2013			2012
	Federal income tax at statutory rate		35	%		35	%		35	%
	State and local taxes, net of federal tax benefit		3.6			4.5			5.6
	Net change in valuation allowance		(0.2	)		0.2			(5.0	)
	Domestic production activities deduction		(1.1	)		(1.5	)		—
	Uncertain tax positions		—			(0.1	)		(1.5	)
	Noncontrolling interest		(4.0	)		(3.4	)		6.7
	Other		(0.8	)		(0.1	)		1.8
	Total		32.5	%		34.6	%		42.6	%
	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 fiscal years ended January 31, 2011 and prior.
	The Company applies the provisions of ASC 740-10-25-5 for uncertain tax positions. As of January 31, 2015, total unrecognized tax benefits were $1,191,000, and accrued penalties and interest were $467,000. If the Company were to prevail on all unrecognized tax benefits recorded, the impact of penalties and interest would 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. It is reasonably possible that the amount of the unrecognized tax benefit with respect to certain unrecognized tax positions will increase or decrease during the next 12 months; however, the Company does not expect the change to have a material effect on results of operations or financial position. A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (dollars in thousands):
		Years Ended
		January 31,
			2015			2014
	Unrecognized tax benefits, beginning of year	$	1,862		$	2,157
	Changes for tax positions for prior years		(204	)		(295	)
	Changes for tax positions for current year		—			—
	Unrecognized tax benefits, end of year	$	1,658		$	1,862

DISCONTINUED_OPERATIONS

DISCONTINUED OPERATIONS	12 Months Ended
	Jan. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	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, including extended warranty revenues and costs, 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. Below is a table reflecting certain items of the Consolidated Statements of Operations that were reclassified as discontinued operations for fiscal years 2014, 2013 and 2012 (amounts in thousands):
		2014			2013			2012
	Net sales and revenue	$	47		$	1,512		$	3,047
	Cost of sales	$	(321	)	$	732		$	1,871
	Income before income taxes	$	368		$	538		$	512
	Provision for income taxes		(134	)		(213	)		(183	)
	Income from discontinued operations, net of tax	$	234		$	325		$	329
	Gain on disposal before provision for income taxes	$	513		$	1,226		$	211
	Provision for income taxes		(186	)		(485	)		(75	)
	Gain on disposal of discontinued operations, net of tax	$	327		$	741		$	136

CONTINGENCIES

CONTINGENCIES	12 Months Ended
	Jan. 31, 2015
Loss Contingency [Abstract]
Contingencies Disclosure [Text Block]	15. CONTINGENCIES
	The Company is involved in various legal actions arising in the normal course of business. After taking into consideration legal counsels’ evaluation of such actions, management is of the opinion that their outcome will not have a material effect on the Company’s consolidated financial statements. There were no liabilities recorded at January 31, 2015 or 2014 as the Company did not believe that there was a probable and reasonably estimable loss associated with any legal contingencies.

NET_SALES_AND_REVENUE

NET SALES AND REVENUE	12 Months Ended
	Jan. 31, 2015
Net Sales And Revenue [Abstract]
Net Sales And Revenue [Text Block]	16. NET SALES AND REVENUE
	The following table summarizes sales at the Company’s consolidated ethanol plants for each product and service group for the periods presented (amounts in thousands):
		Fiscal Year
	Product or Service Category	2014		2013		2012
	Ethanol	$	452,831	$	500,203	$	495,249
	Dried distillers grains		96,328		125,575		114,732
	Non-food grade corn oil		16,985		18,788		16,037
	Modified distillers grains		4,814		18,998		27,463
	Other		1,272		2,481		3,108
	Total	$	572,230	$	666,045	$	656,589
	The Company’s ethanol and distillers grains marketers make all decisions with regard to where products are marketed. All of the Company’s ethanol and distillers grains are sold in the domestic market.

QUARTERLY_UNAUDITED_INFORMATIO

QUARTERLY UNAUDITED INFORMATION	12 Months Ended
	Jan. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	17. QUARTERLY UNAUDITED INFORMATION
	The following tables set forth the Company’s net sales and revenue, gross profit, net income and net income per share (basic and diluted) for each quarter during the last two fiscal years. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
			Quarters Ended
			(In Thousands, Except Per Share Amounts)
			April 30,		July 31,		October 31,		January 31,
			2014		2014		2014		2015
	Net sales and revenue (a)		$	155,924	$	150,231	$	138,424	$	127,651
	Gross profit (a)			36,636		38,838		36,491		29,974
	Net income			24,200		26,718		28,589		24,207
	Net income attributable to REX common shareholders			21,742		21,907		23,340		20,348
	Basic net income per share attributable to REX common shareholders		$	2.68	$	2.68	$	2.86	$	2.55
	Diluted net income per share  attributable to REX common shareholders		$	2.67	$	2.68	$	2.86	$	2.55
			Quarters Ended
			(In Thousands, Except Per Share Amounts)
			April 30,		July 31,		October 31,		January 31,
			2013		2013		2013		2014
	Net sales and revenue (a)		$	178,420	$	175,385	$	166,167	$	146,073
	Gross profit (a)			9,022		10,897		18,025		26,344
	Net income			4,073		6,745		11,478		17,933
	Net income attributable to REX common shareholders			3,507		5,825		9,867		15,874
	Basic net income per share attributable to REX common shareholders		$	0.43	$	0.71	$	1.21	$	1.96
	Diluted net income per share  attributable to REX common shareholders (b)		$	0.43	$	0.71	$	1.21	$	1.95
		a)	Amounts differ from those previously reported as a result of retail operations and certain real estate assets sold being reclassified as discontinued operations and other reclassifications.
		b)	The total of the quarterly net income per share amounts do not equal the annual net loss or income per share amount due to the impact of varying amounts of shares and options outstanding during the year.

RELATED_PARTIES

RELATED PARTIES	12 Months Ended
	Jan. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	18. RELATED PARTIES
	During fiscal years 2014 and 2013, One Earth and NuGen purchased approximately $164.7 million and $262.4 million, respectively, of corn from minority equity investors.

Schedule_II_VALUATION_AND_QUAL

Schedule II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Jan. 31, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	Schedule II - VALUATION AND QUALIFYING ACCOUNTS
	FOR THE YEARS ENDED JANUARY 31, 2015, 2014 AND 2013
	(Amounts in thousands)
				Additions		Deductions
		Balance		Charged to		Charges for		Balance
		Beginning		Cost and		Which Reserves		End of
		of Year		Expenses		Were Created		Year
	2015:00:00
	Deferred tax valuation allowance	$	2,017	$	—	$	265	$	1,752
	2014:00:00
	Deferred tax valuation allowance	$	1,891	$	126	$	—	$	2,017
	2013:00:00
	Deferred tax valuation allowance	$	1,676	$	215	$	—	$	1,891

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	12 Months Ended
	Jan. 31, 2015
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation – The accompanying financial statements consolidate the operating results and financial position of Rex American Resources Corporation and its wholly-owned and majority owned subsidiaries (the “Company” or “REX”). All intercompany balances and transactions have been eliminated. As of January 31, 2015, the Company owns interests in four ethanol entities – two are consolidated and two are accounted for using the equity method of accounting. The Company operates in one reportable segment, alternative energy. The Company completed the exit of its retail business during fiscal year 2009 and recognized, in discontinued operations, revenue and expense associated with administering extended service policies.
Fiscal Period, Policy [Policy Text Block]	Fiscal Year – All references in these consolidated financial statements to a particular fiscal year are to the Company’s fiscal year ended January 31. For example, “fiscal year 2014” means the period February 1, 2014 to January 31, 2015. The Company refers to its fiscal year by reference to the year immediately preceding the January 31 fiscal year end date.
Segment Reporting, Policy [Policy Text Block]	Segments – Beginning in the fourth quarter of fiscal year 2014, the Company has realigned its reportable business segments to be consistent with its management reporting and changes to the nature of ongoing operations. The Company now has one reportable segment, alternative energy. As the Company continues to dispose of assets that were historically reported in its former real estate segment, results of those operations have become insignificant. Prior year amounts have been reclassified to conform to the current year segment reporting. In applying the criteria set forth in ASC 280 “Segment Reporting”, the Company determined that based on the nature of the products and production process and the expected financial results, the Company’s operations at its ethanol plants are aggregated into one reporting segment.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates – The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents – Cash equivalents are principally short-term investments with original maturities of less than three months. The carrying amount of cash equivalents approximates fair value.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentrations of Risk –The Company maintains cash and cash equivalents in accounts with financial institutions which exceed federally insured limits. The Company has not experienced any losses in such accounts. The Company does not believe there is significant credit risk related to its cash and cash equivalents. Four customers accounted for approximately 74%, 82% and 81% of the Company’s net sales and revenue during fiscal years 2014, 2013 and 2012, respectively. At January 31, 2015 and 2014, these customers represented approximately 76% and 91%, respectively, of the Company’s accounts receivable balance. These customers (in fiscal year 2014) were Archer Daniels Midland Company, Biourja Trading, LLC, CHS, Inc. and United Bio Energy, LLC.
Inventory, Policy [Policy Text Block]	Inventory – Inventories are carried at the lower of cost or market on a first-in, first-out basis. Inventory includes direct production costs and certain overhead costs such as depreciation, property taxes and utilities related to producing ethanol and related co-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 significant write-down of inventory at January 31, 2015 or 2014. Fluctuations in the write-down of inventory generally relate to the levels and composition of such inventory at a given point in time and commodity prices. The components of inventory at January 31, 2015, and January 31, 2014 are as follows (amounts in thousands):
		2015			2014
	Ethanol and other finished goods	$	3,039		$	3,517
	Work in process		2,609			3,017
	Grain and other raw materials		12,414			12,836
	Total	$	18,062		$	19,370
Property, Plant and Equipment, Policy [Policy Text Block]	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. The components of property and equipment at January 31, 2015 and 2014 are as follows (amounts in thousands):
		2015			2014
	Land and improvements	$	20,844		$	21,543
	Buildings and improvements		27,069			28,297
	Machinery, equipment and fixtures		231,422			223,544
	Construction in progress		1,290			693
			280,625			274,077
	Less: accumulated depreciation		(86,178	)		(71,819	)
		$	194,447		$	202,258
	In accordance with ASC 360-05 “Impairment or Disposal of Long-Lived Assets”, the carrying value of long-lived assets is assessed for recoverability by management when changes in circumstances indicate that the carrying amount may not be recoverable, based on an analysis of undiscounted future expected cash flows from the use and ultimate disposition of the asset. The Company recorded impairment charges of $68,000 and $55,000 in fiscal years 2014 and 2013, respectively, all of which is included in discontinued operations in the Consolidated Statements of Operations. The Company recorded an impairment charge of $562,000 in fiscal year 2012, of which $13,000 is included in cost of sales and $549,000 is classified as discontinued operations in the Consolidated Statements of Operations. These impairment charges are primarily related to unfavorable changes in real estate conditions in local markets. Impairment charges result from the Company’s management performing cash flow analysis and represent management’s estimate of the excess of net book value over fair value. Given the nature of the Company’s business, events and changes in circumstances include, but are not limited to, a significant decline in estimated future cash flows, a sustained decline in market prices for similar assets or a significant adverse change in legal or regulatory factors or the business climate. A significant decline in estimated future cash flows is represented by a greater than 25% annual decline in expected future cash flows (for real estate asset groups) or a change in the spread between ethanol and grain prices that would result in greater than six consecutive months of estimated or actual significant negative cash flows (for alternative energy asset groups).
	The Company tests for recoverability of an asset group by comparing its carrying amount to its estimated undiscounted future cash flows. If the carrying amount of an asset group exceeds its estimated undiscounted future cash flows, the Company recognizes an impairment charge for the amount by which the asset group’s carrying amount exceeds its fair value, if any. The Company generally determines the fair value of the asset group using a discounted cash flow model based on market participant assumptions (for income producing asset groups) or by obtaining appraisals based on the market approach and comparable market transactions (for non-income producing asset groups).
	For real estate assets, each individual real estate property represents the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. As such, the Company separately tests individual real estate properties for recoverability. Real estate assets include both income producing and non-income producing asset groups.
	For alternative energy assets, each individual ethanol plant represents the lowest level for which identifiable cash flows are independent of the cash flows of other assets and liabilities. As such, the Company separately tests individual ethanol plants for recoverability. In addition to the general events and changes in circumstances noted above that indicate that an asset group may not be recoverable, the Company also considers the following events as indicators: (i) the decision to suspend operations at a plant for at least a six month period; or (ii) an expected or actual failure to maintain compliance with debt covenants at our ethanol plants. Alternative energy assets include only income producing asset groups.
	Depreciation expense was approximately $16,387,000, $16,915,000 and $16,081,000 in fiscal years 2014, 2013 and 2012, respectively.
Investment, Policy [Policy Text Block]	Investments and Deposits – 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 lag as One Earth has a fiscal year end of December 31. NuGen has the same fiscal year as the parent, and therefore, there is no lag in reporting the results of NuGen. 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.
	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 Statements of Operations and a new cost basis in the investment is established.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition – The Company recognizes sales from the production of ethanol, distillers grains and non-food grade corn oil when title transfers to customers, generally upon shipment from the ethanol plant or upon loading of the rail car used to transport the products. Shipping and handling charges billed to customers are included in net sales and revenue.
Cost of Sales, Policy [Policy Text Block]	Costs of Sales – 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.
Selling, General and Administrative Expenses, Policy [Policy Text Block]	Selling, General and Administrative Expenses –The Company includes non-production related costs such as professional fees and certain payroll in selling, general and administrative expenses.
Interest Expense, Policy [Policy Text Block]	Interest Expense – Cash paid for interest in fiscal years 2014, 2013 and 2012 was approximately $2,136,000, $3,492,000 and $4,449,000, respectively.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Financial Instruments – The Company used 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 agreements were not designated for hedge accounting pursuant to ASC 815. The interest rate swaps were recorded at their fair values and the changes in fair values were recorded as gain or loss on derivative financial instruments in the Consolidated Statements of Operations. The Company paid settlements of interest rate swaps of approximately $1,142,000, $1,687,000 and $1,816,000 in fiscal years 2014, 2013 and 2012, respectively.
	Forward grain purchase and ethanol and distillers grains 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 and sales of ethanol in quantities expected to be produced over a reasonable period of time in the normal course of business.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock Compensation – 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 were granted in the fiscal years ended January 31, 2015, January 31, 2014 or January 31, 2013. The following table summarizes options granted, exercised and canceled or expired during the fiscal year ended January 31, 2015:
		Shares			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding—Beginning of year		84		$	12.37
	Granted		—			—
	Exercised		(84	)		12.37
	Canceled or expired		—			—
	Outstanding and exercisable—End of year		—		$	—
	The total intrinsic value of options exercised in the fiscal years ended January 31, 2015, 2014 and 2013, was approximately $4.0 million, $1.1 million and $1.8 million, respectively, resulting in tax deductions to realize benefits of approximately $0.8 million, $0.4 million and $0.2 million, respectively. At January 31, 2015: (i) there were no outstanding stock options; and (ii) there was no unrecognized compensation cost related to nonvested stock options. See Note 11 for a further discussion of stock options.
Income Tax, Policy [Policy Text Block]	Income Taxes – 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 bases 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.
Discontinued Operation [Policy Text Block]	Discontinued Operations – The Company classifies sold real estate assets in discontinued operations when the operations and cash flows of the real estate assets have been (or will be) eliminated from ongoing operations and when the Company will not have any significant continuing involvement in the operation of the real estate after disposal. To determine if cash flows had been or would be eliminated from ongoing operations, the Company evaluates a number of qualitative and quantitative factors. For purposes of reporting the operations of real estate assets meeting the criteria for discontinued operations, the Company reports net sales and revenue, gross profit and related selling, general and administrative expenses that are specifically identifiable to those assets as discontinued operations. Certain corporate level charges, such as general office expense, certain interest expense, and other “fixed” expenses are not allocated to discontinued operations because the Company believes that these expenses were not specific to components’ operations.
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]	New Accounting Pronouncements – Effective February 1, 2014, the Company adopted ASU 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. The Company has not determined the impact of adopting ASU 2014-08 on its 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 its consolidated financial statements.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Jan. 31, 2015
Accounting Policies [Abstract]
Schedule of Inventory, Current [Table Text Block]	The components of inventory at January 31, 2015, and January 31, 2014 are as follows (amounts in thousands):
		2015			2014
	Ethanol and other finished goods	$	3,039		$	3,517
	Work in process		2,609			3,017
	Grain and other raw materials		12,414			12,836
	Total	$	18,062		$	19,370
Property, Plant and Equipment [Table Text Block]	The components of property and equipment at January 31, 2015 and 2014 are as follows (amounts in thousands):
		2015			2014
	Land and improvements	$	20,844		$	21,543
	Buildings and improvements		27,069			28,297
	Machinery, equipment and fixtures		231,422			223,544
	Construction in progress		1,290			693
			280,625			274,077
	Less: accumulated depreciation		(86,178	)		(71,819	)
		$	194,447		$	202,258
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	The following table summarizes options granted, exercised and canceled or expired during the fiscal year ended January 31, 2015:
		Shares			Weighted
		(000’s)			Average
					Exercise
					Price
	Outstanding—Beginning of year		84		$	12.37
	Granted		—			—
	Exercised		(84	)		12.37
	Canceled or expired		—			—
	Outstanding and exercisable—End of year		—		$	—

INVESTMENTS_AND_DEPOSITS_Table

INVESTMENTS AND DEPOSITS (Tables)	12 Months Ended
	Jan. 31, 2015
Investments And Deposits [Abstract]
Equity Method Investments [Table Text Block]	The following table summarizes equity method investments at January 31, 2015 and 2014 (amounts in thousands):
	Entity	Ownership			Carrying		Carrying
		Percentage			Amount		Amount
					January 31,		January 31,
					2015		2014
	Big River Resources, LLC		10	%	$	40,188	$	40,042
	Patriot Holdings, LLC		27	%		40,201		31,147
	Total Equity Method Investments				$	80,389	$	71,189
Condensed Balance Sheet [Table Text Block]	Summarized financial information for each of the Company’s equity method investees, as of their fiscal year end is presented in the following table (amounts in thousands):
		Patriot			Big River
	Current assets	$	56,272		$	180,186
	Non current assets		158,828			343,182
	Total assets	$	215,100		$	523,368
	Current liabilities	$	19,205		$	57,130
	Long-term liabilities		49,542			—
	Total liabilities	$	68,747		$	57,130
	Noncontrolling interests	$	—		$	46,913
		Patriot			Big River
	Current assets	$	26,540		$	164,278
	Non current assets		159,081			348,884
	Total assets	$	185,621		$	513,162
	Current liabilities	$	16,034		$	68,769
	Long-term liabilities		57,847			12,503
	Total liabilities	$	73,881		$	81,272
	Noncontrolling interests	$	—		$	45,045
Schedule of Financial Information for Equity Method Investments [Table Text Block]	Summarized financial information for each of the Company’s equity method investees is presented in the following table for the years ended December 31, 2014, 2013 and 2012 (amounts in thousands):
		Patriot			Big River
	Net sales and revenue	$	331,260		$	1,184,505
	Gross profit	$	59,980		$	241,963
	Income from continuing operations	$	52,875		$	187,388
	Net income	$	52,875		$	187,388
		Patriot			Big River
	Net sales and revenue	$	377,532		$	1,292,120
	Gross profit	$	37,411		$	124,327
	Income from continuing operations	$	31,518		$	90,729
	Net income	$	31,518		$	90,729
		Patriot			Big River
	Net sales and revenue	$	365,302		$	1,135,956
	Gross profit	$	7,685		$	20,651
	Income from continuing operations	$	1,320		$	2,799
	Net income	$	1,320		$	2,799

FAIR_VALUE_Tables

FAIR VALUE (Tables)	12 Months Ended
	Jan. 31, 2015
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 at January 31, 2015 on a recurring basis are summarized below (amounts in thousands):
			Level 1		Level 2		Level 3		Total
									Fair
									Value
	Investment in Cooperative Asset (1)		$	—	$	—	$	333	$	333
			Level 1		Level 2		Level 3		Total
									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 Liabilities		$	—	$	1,141	$	—	$	1,141
		(1) The money market mutual fund is included in “Restricted investments and deposits” and the investment in cooperative is included in “Other assets” on the accompanying Consolidated Balance Sheets.
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 measured at fair value on a recurring basis using Level 3 inputs (amounts in thousands):
			Investment in
			Cooperative
	Balance, January 31, 2013		$	252
	Fair value adjustment			37
	Balance, January 31, 2014			289
	Fair value adjustment			44
	Balance, January 31, 2015		$	333
Fair Value Measurements, Nonrecurring [Table Text Block]	Assets measured at fair value at January 31, 2014 on a non-recurring basis are summarized below (amounts in thousands):
			Year Ended		Level 1		Level 2		Level 3		Total
			31-Jan-14								Losses
	Property and equipment, net		$	521	$	—	$	—	$	521	$	55

OTHER_ASSETS_Tables

OTHER ASSETS (Tables)	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Schedule of Other Assets [Table Text Block]	The components of other noncurrent assets at January 31, 2015 and 2014 are as follows (amounts in thousands):
		January 31,
		2015		2014
	Deferred financing costs, net	$	—	$	402
	Deposits		914		1,014
	Real estate taxes refundable		4,395		3,644
	Other		1,057		328
	Total	$	6,366	$	5,388

ACCRUED_EXPENSES_AND_OTHER_CUR1

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block Supplement [Abstract]
Other Current Liabilities [Table Text Block]	The components of accrued expenses and other current liabilities at January 31, 2015 and 2014 are as follows (amounts in thousands):
		January 31,
		2015		2014
	Accrued utility charges	$	3,085	$	3,745
	Accrued income taxes		—		615
	Accrued payroll and related items		3,798		3,122
	Accrued real estate taxes		2,507		2,471
	Other		957		2,194
	Total	$	10,347	$	12,147

NET_INCOME_PER_SHARE_FROM_CONT1

NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Tables)	12 Months Ended
	Jan. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table reconciles the basic and diluted net income per share amounts from continuing operations computations for each year presented for fiscal years 2014 and 2013 (amounts in thousands, except per-share amounts):
		2014
		Income		Shares		Per Share
	Basic net income per share from continuing operations attributable to REX common shareholders	$	86,776		8,109	$	10.7
	Effect of stock options				9
	Diluted net income per share from continuing operations attributable to REX common shareholders	$	86,776		8,118	$	10.69
		2013
		Income		Shares		Per Share
	Basic net income per share from continuing operations attributable to REX common shareholders	$	34,007		8,137	$	4.18
	Effect of stock options				43
	Diluted net income per share from continuing operations attributable to REX common shareholders	$	34,007		8,180	$	4.16

LEASES_Tables

LEASES (Tables)	12 Months Ended
	Jan. 31, 2015
Leases [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	As of January 31, 2015, future minimum annual rentals on such leases are as follows (amounts in thousands):
	Years Ended		Minimum
	January 31,		Rentals
		2016	$	296
		2017		253
		2018		115
		2019		72
		2020		72
		Thereafter		329
			$	1,137

COMMON_STOCK_Tables

COMMON STOCK (Tables)	12 Months Ended
	Jan. 31, 2015
Stockholders' Equity Note [Abstract]
Schedule of Stock by Class [Table Text Block]	Information regarding the Company’s common stock is as follows (amounts in thousands):
		January 31,	January 31,
		2015	2014
	Authorized shares	45,000	45,000
	Issued shares	29,853	29,853
	Outstanding shares	7,900	8,100

LONGTERM_DEBT_AND_INTEREST_RAT1

LONG-TERM DEBT AND INTEREST RATE SWAPS (Tables)	12 Months Ended
	Jan. 31, 2015
Disclosure Text Block [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The following provides information on rates segregated as fixed or variable and by term:
		January 31, 2014
			Balance
	Interest Rates	Maturity	(in thousands)
	3.24% - 4.00%	Variable		$	75,726
		Within five years
	3.24% - 4.00%	Variable		$	75,726
		Within five years

FINANCIAL_INSTRUMENTS_Tables

FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Jan. 31, 2015
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 January 31, 2014 is summarized in the table below (amounts in thousands):
		Notional		Fair Value
		Amount		Liability
	Interest rate swap	$	33,444	$	1,141

EMPLOYEE_BENEFITS_Tables

EMPLOYEE BENEFITS (Tables)	12 Months Ended
	Jan. 31, 2015
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 summarizes stock option activity for fiscal years 2014, 2013 and 2012 (amounts in thousands, except per-share amounts):
		2014					2013					2012
		Shares			Weighted		Shares			Weighted		Shares			Weighted
		(000’s)			Average		(000’s)			Average		(000’s)			Average
					Exercise					Exercise					Exercise
					Price					Price					Price
	Outstanding—Beginning of year		84		$	12.37		169		$	12.46		269		$	13.15
	Exercised		(84	)		12.37		(85	)		12.55		(100	)		14.3
	Canceled or expired		—			—		—			—		—			—
	Outstanding—End of year		—					84		$	12.37		169		$	12.46
	Exercisable—End of year		—					84		$	12.37		169		$	12.46

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The provision (benefit) for income taxes from continuing operations for fiscal years 2014, 2013 and 2012 consists of the following (amounts in thousands):
		2014			2013			2012
	Federal:
	Current	$	23,452		$	2,974		$	—
	Deferred		20,717			15,402			(1,518	)
			44,169			18,376			(1,518	)
	State and Local:
	Current		3,536			2,154			—
	Deferred		1,944			221			(30	)
			5,480			2,375			(30	)
	Provision (benefit) for income taxes	$	49,649		$	20,751		$	(1,548	)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The tax effects of significant temporary differences representing deferred tax assets and liabilities are as follows as of January 31, 2015 and 2014 (amounts in thousands):
		January 31,
		2015			2014
	Assets:
	Accrued liabilities	$	664		$	331
	Stock based compensation		—			185
	AMT credit carryforward		4,015			19,751
	Alcohol fuels tax credit		—			546
	State net operating loss carryforward		1,343			2,833
	Other items		624			396
	Valuation allowance		(1,752	)		(2,017	)
	Total		4,894			22,025
	Liabilities:
	Basis in pass through entities, including depreciation		(44,783	)		(39,195	)
	Other		(516	)		(297	)
	Total		(45,299	)		(39,492	)
	Net deferred tax liability	$	(40,405	)	$	(17,467	)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The effective income tax rate on consolidated pre-tax income or loss differs from the federal income tax statutory rate for fiscal years 2014, 2013 and 2012 as follows:
		2014			2013			2012
	Federal income tax at statutory rate		35	%		35	%		35	%
	State and local taxes, net of federal tax benefit		3.6			4.5			5.6
	Net change in valuation allowance		(0.2	)		0.2			(5.0	)
	Domestic production activities deduction		(1.1	)		(1.5	)		—
	Uncertain tax positions		—			(0.1	)		(1.5	)
	Noncontrolling interest		(4.0	)		(3.4	)		6.7
	Other		(0.8	)		(0.1	)		1.8
	Total		32.5	%		34.6	%		42.6	%
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 (dollars in thousands):
		Years Ended
		January 31,
			2015			2014
	Unrecognized tax benefits, beginning of year	$	1,862		$	2,157
	Changes for tax positions for prior years		(204	)		(295	)
	Changes for tax positions for current year		—			—
	Unrecognized tax benefits, end of year	$	1,658		$	1,862

DISCONTINUED_OPERATIONS_Tables

DISCONTINUED OPERATIONS (Tables)	12 Months Ended
	Jan. 31, 2015
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 Statements of Operations that were reclassified as discontinued operations for fiscal years 2014, 2013 and 2012 (amounts in thousands):
		2014			2013			2012
	Net sales and revenue	$	47		$	1,512		$	3,047
	Cost of sales	$	(321	)	$	732		$	1,871
	Income before income taxes	$	368		$	538		$	512
	Provision for income taxes		(134	)		(213	)		(183	)
	Income from discontinued operations, net of tax	$	234		$	325		$	329
	Gain on disposal before provision for income taxes	$	513		$	1,226		$	211
	Provision for income taxes		(186	)		(485	)		(75	)
	Gain on disposal of discontinued operations, net of tax	$	327		$	741		$	136

NET_SALES_AND_REVENUE_Tables

NET SALES AND REVENUE (Tables)	12 Months Ended
	Jan. 31, 2015
Net Sales And Revenue [Abstract]
Revenue from External Customers by Products and Services [Table Text Block]	The following table summarizes sales at the Company’s consolidated ethanol plants for each product and service group for the periods presented (amounts in thousands):
		Fiscal Year
	Product or Service Category	2014		2013		2012
	Ethanol	$	452,831	$	500,203	$	495,249
	Dried distillers grains		96,328		125,575		114,732
	Non-food grade corn oil		16,985		18,788		16,037
	Modified distillers grains		4,814		18,998		27,463
	Other		1,272		2,481		3,108
	Total	$	572,230	$	666,045	$	656,589

QUARTERLY_UNAUDITED_INFORMATIO1

QUARTERLY UNAUDITED INFORMATION (Tables)	12 Months Ended
	Jan. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	The following tables set forth the Company’s net sales and revenue, gross profit, net income and net income per share (basic and diluted) for each quarter during the last two fiscal years. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
			Quarters Ended
			(In Thousands, Except Per Share Amounts)
			April 30,		July 31,		October 31,		January 31,
			2014		2014		2014		2015
	Net sales and revenue (a)		$	155,924	$	150,231	$	138,424	$	127,651
	Gross profit (a)			36,636		38,838		36,491		29,974
	Net income			24,200		26,718		28,589		24,207
	Net income attributable to REX common shareholders			21,742		21,907		23,340		20,348
	Basic net income per share attributable to REX common shareholders		$	2.68	$	2.68	$	2.86	$	2.55
	Diluted net income per share  attributable to REX common shareholders		$	2.67	$	2.68	$	2.86	$	2.55
			Quarters Ended
			(In Thousands, Except Per Share Amounts)
			April 30,		July 31,		October 31,		January 31,
			2013		2013		2013		2014
	Net sales and revenue (a)		$	178,420	$	175,385	$	166,167	$	146,073
	Gross profit (a)			9,022		10,897		18,025		26,344
	Net income			4,073		6,745		11,478		17,933
	Net income attributable to REX common shareholders			3,507		5,825		9,867		15,874
	Basic net income per share attributable to REX common shareholders		$	0.43	$	0.71	$	1.21	$	1.96
	Diluted net income per share  attributable to REX common shareholders (b)		$	0.43	$	0.71	$	1.21	$	1.95
		a)	Amounts differ from those previously reported as a result of retail operations and certain real estate assets sold being reclassified as discontinued operations and other reclassifications.
		b)	The total of the quarterly net income per share amounts do not equal the annual net loss or income per share amount due to the impact of varying amounts of shares and options outstanding during the year.

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number of Ethanol Entities Under Ownership Interest	4
Number of Reportable Segments	1
Concentration Risk Number of Customer	4
Concentration Risk, Percentage	74.00%	82.00%	81.00%
Property, Plant and Equipment, Depreciation Methods	Depreciation is computed using the straight-line method
Impairment of Real Estate	$68,000	$55,000	$562,000
Estimated Cash Flow Percentage	25.00%
EstimatedFutureCashFlowsTerms	six
Depreciation	16,387,000	16,915,000	16,081,000
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting	20.00%
Interest Paid	2,136,000	3,492,000	4,449,000
Derivative Settlement on Interest Rate Swap	1,142,000	1,687,000	1,816,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	4,000,000	1,100,000	1,800,000
Deferred Tax Expense from Stock Options Exercised	800,000	400,000	200,000
Cost of Sales [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Impairment of Real Estate		55,000	13,000
Discontinued Operation [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Impairment of Real Estate			$549,000
Building and Building Improvements [Member] | Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	15
Building and Building Improvements [Member] | Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	40
Fixtures And Equipment [Member] | Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3
Fixtures And Equipment [Member] | Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	20
Customer Concentration Risk [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Percentage	76.00%	91.00%

SUMMARY_OF_SIGNIFICANT_ACCOUNT3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of components of inventory (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of components of inventory [Abstract]
Ethanol and other finished goods	$3,039	$3,517
Work in process	2,609	3,017
Grain and other raw materials	12,414	12,836
Total	$18,062	$19,370

SUMMARY_OF_SIGNIFICANT_ACCOUNT4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Property Plant and Equipment (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of Property Plant and Equipment [Abstract]
Land and improvements	$20,844	$21,543
Buildings and improvements	27,069	28,297
Machinery, equipment and fixtures	231,422	223,544
Construction in progress	1,290	693
	280,625	274,077
Less: accumulated depreciation	-86,178	-71,819
	$194,447	$202,258

SUMMARY_OF_SIGNIFICANT_ACCOUNT5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Share-Based Compensation (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Share-Based Compensation [Abstract]
Outstanding—Beginning of year	84	169	269
Outstanding—Beginning of year	$12.37	$12.46	$13.15
Exercised	-84	-85	-100
Exercised	$12.37	$12.55	$14.30

INVESTMENTS_AND_DEPOSITS_Detai

INVESTMENTS AND DEPOSITS (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Income (Loss) from Equity Method Investments	$32,229,000	$17,175,000	$627,000
Equity Method Investments	80,389,000	71,189,000
Retained Earnings, Undistributed Earnings from Equity Method Investees	41,900,000	32,600,000
Big River [Member] | Big River Resources United Energy LLC [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Equity Method Investment, Ownership Percentage	50.50%
Big River [Member] | Burlington [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons)	108,000,000
Big River [Member] | Illinois [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons)	119,000,000
Big River [Member] | Dyersville [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons)	125,000,000
Big River [Member] | Boyceville [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons)	58,000,000
Big River [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Agreement to Invest During Year	20,000,000
Equity Method Investment, Ownership Percentage	10.00%
Income (Loss) from Equity Method Investments	18,200,000	8,800,000	300,000
Proceeds from Equity Method Investment, Dividends or Distributions	18,000,000	1,200,000	2,200,000
Equity Method Investments	40,188,000	40,042,000
Equity Method Investment, Underlying Equity in Net Assets	40,700,000
Patriot [Member] | Illinois [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Quantity of ethanol shipped (in US Gallons)	126,000,000
Patriot [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Equity Method Investment, Ownership Percentage	27.00%
Income (Loss) from Equity Method Investments	14,000,000	8,400,000	400,000
Proceeds from Equity Method Investment, Dividends or Distributions	4,900,000	4,600,000
Equity Method Investments	40,201,000	31,147,000
Equity Method Investment, Underlying Equity in Net Assets	38,900,000
Equity Method Initial Investments	17,900,000
Patriot And Big River [Member]
INVESTMENTS AND DEPOSITS (Details) [Line Items]
Other Restricted Assets	421,900,000
Proportionate Share of Restricted Net Assets	$57,700,000

INVESTMENTS_AND_DEPOSITS_Detai1

INVESTMENTS AND DEPOSITS (Details) - Schedule of Equity Method Investments (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of Equity Method Investments [Line Items]
Total Equity Method Securities, Carrying Amount	$80,389	$71,189
Big River [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Securities, Ownership percentage	10.00%
Total Equity Method Securities, Carrying Amount	40,188	40,042
Patriot [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Securities, Ownership percentage	27.00%
Total Equity Method Securities, Carrying Amount	$40,201	$31,147

INVESTMENTS_AND_DEPOSITS_Detai2

INVESTMENTS AND DEPOSITS (Details) - Schedule of Condensed Balance Sheet (USD $)	Jan. 31, 2015	Jan. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	$175,745	$148,810
Current liabilities	19,557	32,140
Noncontrolling interests	42,993	31,472
Patriot [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets			56,272	26,540
Non current assets			158,828	159,081
Total assets			215,100	185,621
Current liabilities			19,205	16,034
Long-term liabilities			49,542	57,847
Total liabilities			68,747	73,881
Big River [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets			180,186	164,278
Non current assets			343,182	348,884
Total assets			523,368	513,162
Current liabilities			57,130	68,769
Long-term liabilities				12,503
Total liabilities			57,130	81,272
Noncontrolling interests			$46,913	$45,045

INVESTMENTS_AND_DEPOSITS_Detai3

INVESTMENTS AND DEPOSITS (Details) - Schedule of Financial information For Equity Method Investment (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Patriot [Member]
INVESTMENTS AND DEPOSITS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	$331,260	$377,532	$365,302
Gross profit	59,980	37,411	7,685
Income from continuing operations	52,875	31,518	1,320
Net income	52,875	31,518	1,320
Big River [Member]
INVESTMENTS AND DEPOSITS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	1,184,505	1,292,120	1,135,956
Gross profit	241,963	124,327	20,651
Income from continuing operations	187,388	90,729	2,799
Net income	$187,388	$90,729	$2,799

FAIR_VALUE_Details

FAIR VALUE (Details) (USD $)	12 Months Ended
	Jan. 31, 2015
Fair Value Disclosures [Abstract]
Impairment of Long-Lived Assets to be Disposed of	$68,000

FAIR_VALUE_Details_Schedule_of

FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (USD $)	Jan. 31, 2015		Jan. 31, 2014
In Thousands, unless otherwise specified
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investment in Cooperative	$333	[1]	$289	[1]
Total Assets			411
Interest Rate Swap Derivative Liabilities			1,141
Cash Equivalents			2
Money Market Mutual Fund (1)			120	[1]
Fair Value, Inputs, Level 1 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total Assets			122
Cash Equivalents			2
Money Market Mutual Fund (1)			120	[1]
Fair Value, Inputs, Level 2 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Interest Rate Swap Derivative Liabilities			1,141
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	333	[1]	289	[1]
Total Assets			$289
[1]	The money market mutual fund is included in "Restricted investments and deposits" and the investment in cooperative is included in "Other assets" on the accompanying Consolidated Balance Sheets.

FAIR_VALUE_Details_Fair_Value_

FAIR VALUE (Details) - Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Balance	$333	$289	$252
Fair value adjustment	$44	$37

FAIR_VALUE_Details_Assets_meas

FAIR VALUE (Details) - Assets measured at fair value on a non-recurring basis (USD $)	Jan. 31, 2014
In Thousands, unless otherwise specified
FAIR VALUE (Details) - Assets measured at fair value on a non-recurring basis [Line Items]
Property and equipment, net	$521
Assets Measured At Fair Value On A Non Recurring Basis Subsequent [Member] | 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
Assets Measured At Fair Value On A Non Recurring Basis Subsequent [Member]
FAIR VALUE (Details) - Assets measured at fair value on a non-recurring basis [Line Items]
Property and equipment, net	$55

OTHER_ASSETS_Details_Schedule_

OTHER ASSETS (Details) - Schedule of Other Assets (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of Other Assets [Abstract]
Deferred financing costs, net		$402
Deposits	914	1,014
Real estate taxes refundable	4,395	3,644
Other	1,057	328
Total	$6,366	$5,388

ACCRUED_EXPENSES_AND_OTHER_CUR2

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - Schedule of accrued expenses and other current liabilities (USD $)	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of accrued expenses and other current liabilities [Abstract]
Accrued utility charges	$3,085	$3,745
Accrued income taxes		615
Accrued payroll and related items	3,798	3,122
Accrued real estate taxes	2,507	2,471
Other	957	2,194
Total	$10,347	$12,147

NET_INCOME_PER_SHARE_FROM_CONT2

NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Details)	12 Months Ended
	Jan. 31, 2013
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	168,755

NET_INCOME_PER_SHARE_FROM_CONT3

NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Details) - Schedule of Earnings Per Share, Basic and Diluted (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Basic net income per share from continuing operations attributable to REX common shareholders (in Dollars)	$86,776	$34,007
Basic net income per share from continuing operations attributable to REX common shareholders	8,109	8,137	8,272
Basic net income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$10.70	$4.18	($0.33)
Effect of stock options	9	43
Diluted net income per share from continuing operations attributable to REX common shareholders (in Dollars)	$86,776	$34,007
Diluted net income per share from continuing operations attributable to REX common shareholders	8,118	8,180	8,272
Diluted net income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$10.69	$4.16	($0.33)

LEASES_Details

LEASES (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Leases [Abstract]
Number of Owned Properties Subject to Operating Lease	4
Operating Leases, Income Statement, Minimum Lease Revenue	$341,000	$420,000	$422,000

LEASES_Details_Schedule_of_Fut

LEASES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases (USD $)	Jan. 31, 2015
In Thousands, unless otherwise specified
Schedule of Future Minimum Rental Payments for Operating Leases [Abstract]
2016	$296
2017	253
2018	115
2019	72
2020	72
Thereafter	329
	$1,137

COMMON_STOCK_Details

COMMON STOCK (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
COMMON STOCK (Details) [Line Items]
Treasury Stock, Shares, Acquired	283,979	137,015	278,369
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$18,238,000	$3,486,000	$5,445,000
Stock Repurchase Program Number of Additional Shares Authorized to be Repurchased	497,582
Employee Stock Option [Member]
COMMON STOCK (Details) [Line Items]
Treasury Stock, Shares, Acquired	1,555		32,935
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$100,000		$1,071,000

COMMON_STOCK_Details_Schedule_

COMMON STOCK (Details) - Schedule of Stock by Class	Jan. 31, 2015	Jan. 31, 2014
In Thousands, unless otherwise specified
Schedule of Stock by Class [Abstract]
Authorized shares	45,000	45,000
Issued shares	29,853	29,853
Outstanding shares	7,900	8,100

LONGTERM_DEBT_AND_INTEREST_RAT2

LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) (USD $)	12 Months Ended	24 Months Ended
	Jan. 31, 2015	Jan. 31, 2015	Jan. 31, 2014
LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum		3.15%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum		4.00%
Repayments of Debt	$75,700,000
Long-term Debt, Fair Value			75,100,000
Derivative Liability, Notional Amount			33,400,000
Derivative Liability			1,141,000
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	50,000,000
Swap Termination Date	8-Jul-14
Debt Instrument, Basis Spread on Variable Rate	7.90%
Interest Rate Swap Two [Member] | One Earth Energy [Member]
LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) [Line Items]
Derivative Liability, Notional Amount	25,000,000	25,000,000
Swap Termination Date	31-Jul-11
Debt Instrument, Basis Spread on Variable Rate	5.49%
Interest Rate Swap [Member] | One Earth Energy [Member]
LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) [Line Items]
Derivative Liability			1,100,000
Interest Rate Swap [Member]
LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) [Line Items]
Derivative Liability, Notional Amount			33,444,000
Derivative Liability			$1,141,000

LONGTERM_DEBT_AND_INTEREST_RAT3

LONG-TERM DEBT AND INTEREST RATE SWAPS (Details) - Schedule of Long-term Debt Instruments (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2014
Debt Instrument [Line Items]
Maturity	Variable Within five years
Balance (in Dollars)	$75,726
Minimum [Member]
Debt Instrument [Line Items]
Interest Rates	3.24%
Maximum [Member]
Debt Instrument [Line Items]
Interest Rates	4.00%

FINANCIAL_INSTRUMENTS_Details

FINANCIAL INSTRUMENTS (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Disclosure Text Block Supplement [Abstract]
Derivative Liability, Notional Amount		$33,400,000
Derivative Liability		1,141,000
Gain (Loss) on Derivative Instruments, Net, Pretax	-1,000	-39,000	-370,000
Payments for Interest Rate Swap Settlement	$1,142,000	$1,687,000	$1,816,000

FINANCIAL_INSTRUMENTS_Details_

FINANCIAL INSTRUMENTS (Details) - Schedule of Notional Amounts and fair Values (USD $)	Jan. 31, 2014
In Thousands, unless otherwise specified
FINANCIAL INSTRUMENTS (Details) - Schedule of Notional Amounts and fair Values [Line Items]
Interest rate swap	$33,400
Interest rate swap	1,141
Interest Rate Swap [Member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Notional Amounts and fair Values [Line Items]
Interest rate swap	33,444
Interest rate swap	$1,141

EMPLOYEE_BENEFITS_Details

EMPLOYEE BENEFITS (Details) (Employee Stock Option [Member])	12 Months Ended
	Jan. 31, 2015
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	4,500,000
Stock Option Plans 1995 [Member]
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	108,011
Stock Option Plans 1999 [Member]
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	2,302,425

EMPLOYEE_BENEFITS_Details_Sche

EMPLOYEE BENEFITS (Details) - Schedule of Share-based Compensation, Stock Options, Activity (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Share-based Compensation, Stock Options, Activity [Abstract]
Outstanding—Beginning of year	84	169	269
Outstanding—Beginning of year	$12.37	$12.46	$13.15
Exercised	-84	-85	-100
Exercised	$12.37	$12.55	$14.30
Outstanding—End of year		84	169
Outstanding—End of year		$12.37	$12.46
Exercisable—End of year		84	169
Exercisable—End of year		$12.37	$12.46

COMMITMENTS_Details

COMMITMENTS (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
COMMITMENTS (Details) [Line Items]
Operating Leases, Future Minimum Payments Due	$1,137,000
Natural Gas Pipeline [Member] | One Earth Energy [Member]
COMMITMENTS (Details) [Line Items]
Lease Expiration Period	10 years
Operating Leases, Future Minimum Payments Due	4,380,000
Number of installments payable	120
Installment amount	36,500
Operating Leases, Rent Expense, Net	438,000	438,000	438,000
Railcars One [Member] | One Earth Energy [Member]
COMMITMENTS (Details) [Line Items]
Operating Leases, Rent Expense, Net	2,572,000	2,055,000	1,723,000
Lease Expiration Date	31-May-22
Distillers Grains Marketing Services [Member] | One Earth Energy [Member]
COMMITMENTS (Details) [Line Items]
Expiration Date of Grain Agreement	1-Jul-15
Marketing Expense	613,000	640,000	627,000
Distillers Grains Marketing Services [Member] | Nu Gen Energy [Member]
COMMITMENTS (Details) [Line Items]
Expiration Date of Grain Agreement	31-Jul-15
Marketing Expense	577,000	838,000	833,000
RailCars [Member] | Nu Gen Energy [Member]
COMMITMENTS (Details) [Line Items]
Operating Leases, Rent Expense, Net	$4,452,000	$4,350,000	$2,714,000
One Earth Energy And Nu Gen Energy [Member]
COMMITMENTS (Details) [Line Items]
Quantity of Bushels under Forward Purchase Contract (in US Bushels)	10,000,000
Quantity of Ethanol under Sales Commitment (in US Gallons)	50,200,000
Quantity of Distillers Grains Under Sales Commitment (in US Tons)	126,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments (in Pounds)	6,800,000
One Earth Energy [Member]
COMMITMENTS (Details) [Line Items]
Expiration Date of Grain Agreement	31-Oct-15
Percentage of Grain Purchase Under Agreement	100.00%	100.00%	100.00%
Maximum Period to Notify Other Party for Grain Agreement Period Extension	180 months

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
INCOME TAXES (Details) [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$4,015,000	$19,751,000
Income to be Generated for Utilization of Alternative Minimum Tax Credit Carryforwards	27,000,000
Deferred Tax Assets, Valuation Allowance	1,752,000	2,017,000	1,891,000	1,676,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	-265,000	126,000	215,000
Income Taxes Paid	30,142,000	3,450,000	51,000
Proceeds from Income Tax Refunds	53,000	38,000	1,005,000
Unrecognized Tax Benefit	1,191,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	467,000
State and Local Jurisdiction [Member]
INCOME TAXES (Details) [Line Items]
Operating Loss Carryforwards	$18,000,000

INCOME_TAXES_Details_Schedule_

INCOME TAXES (Details) - Schedule of Components of Income Tax Expense (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Federal:
Current	$23,452	$2,974
Deferred	20,717	15,402	-1,518
	44,169	18,376	-1,518
State and Local:
Current	3,536	2,154
Deferred	1,944	221	-30
	5,480	2,375	-30
Provision (benefit) for income taxes	$49,649	$20,751	($1,548)

INCOME_TAXES_Details_Schedule_1

INCOME TAXES (Details) - Schedule of Deferred Tax Assets and Liabilities (USD $)	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Assets:
Accrued liabilities	$664,000	$331,000
Stock based compensation		185,000
AMT credit carryforward	4,015,000	19,751,000
Alcohol fuels tax credit		546,000
State net operating loss carryforward	1,343,000	2,833,000
Other items	624,000	396,000
Valuation allowance	-1,752,000	-2,017,000	-1,891,000	-1,676,000
Total	4,894,000	22,025,000
Liabilities:
Basis in pass through entities, including depreciation	-44,783,000	-39,195,000
Other	-516,000	-297,000
Total	-45,299,000	-39,492,000
Net deferred tax liability	($40,405,000)	($17,467,000)

INCOME_TAXES_Details_Schedule_2

INCOME TAXES (Details) - Schedule of Effective Income Tax Reconciliation	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Effective Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate	35.00%	35.00%	35.00%
State and local taxes, net of federal tax benefit	3.60%	4.50%	5.60%
Net change in valuation allowance	-0.20%	0.20%	-5.00%
Domestic production activities deduction	-1.10%	-1.50%
Uncertain tax positions		-0.10%	-1.50%
Noncontrolling interest	-4.00%	-3.40%	6.70%
Other	-0.80%	-0.10%	1.80%
Total	32.50%	34.60%	42.60%

INCOME_TAXES_Details_Schedule_3

INCOME TAXES (Details) - Schedule of Unrecognized Tax Benefits Roll Forward (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Schedule of Unrecognized Tax Benefits Roll Forward [Abstract]
Unrecognized tax benefits, beginning of year	$1,862	$2,157
Changes for tax positions for prior years	-204	-295
Unrecognized tax benefits, end of year	$1,658	$1,862

DISCONTINUED_OPERATIONS_Detail

DISCONTINUED OPERATIONS (Details) - Schedule of Disposal Groups Including Discontinued Operations (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Disposal Groups Including Discontinued Operations [Abstract]
Net sales and revenue	$47	$1,512	$3,047
Cost of sales	-321	732	1,871
Income before income taxes	368	538	512
Provision for income taxes	-134	-213	-183
Income from discontinued operations, net of tax	234	325	329
Gain on disposal before provision for income taxes	513	1,226	211
Provision for income taxes	-186	-485	-75
Gain on disposal of discontinued operations, net of tax	$327	$741	$136

CONTINGENCIES_Details

CONTINGENCIES (Details) (USD $)	Jan. 31, 2015	Jan. 31, 2014
Loss Contingency [Abstract]
Loss Contingency Accrual	$0	$0

NET_SALES_AND_REVENUE_Details_

NET SALES AND REVENUE (Details) - Schedule of Sales of Consolidated Ethanol Plants (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Jan. 31, 2015

Oct. 31, 2014

Jul. 31, 2014

Apr. 30, 2014

Jan. 31, 2014

Oct. 31, 2013

Jul. 31, 2013

Apr. 30, 2013

Jan. 31, 2015

Jan. 31, 2014

Jan. 31, 2013

Revenue from External Customer [Line Items]

Sales

$127,651

[1]

$138,424

[1]

$150,231

[1]

$155,924

[1]

$146,073

[1]

$166,167

[1]

$175,385

[1]

$178,420

[1]

$572,230

$666,045

$656,589

Ethanol [Member]

Revenue from External Customer [Line Items]

Sales

452,831

500,203

495,249

Dried Distillers Grains [Member]

Revenue from External Customer [Line Items]

Sales

96,328

125,575

114,732

Non-Food Grade Corn Oil [Member]

Revenue from External Customer [Line Items]

Sales

16,985

18,788

16,037

Modified Distillers Grains [Member]

Revenue from External Customer [Line Items]

Sales

4,814

18,998

27,463

Other Product [Member]

Revenue from External Customer [Line Items]

Sales

$1,272

$2,481

$3,108

[1]

Amounts differ from those previously reported as a result of retail operations and certain real estate assets sold being reclassified as discontinued operations and other reclassifications.

QUARTERLY_UNAUDITED_INFORMATIO2

QUARTERLY UNAUDITED INFORMATION (Details) - Schedule of Quarterly Financial Information (USD $)	3 Months Ended																12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jan. 31, 2015		Oct. 31, 2014		Jul. 31, 2014		Apr. 30, 2014		Jan. 31, 2014		Oct. 31, 2013		Jul. 31, 2013		Apr. 30, 2013		Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Schedule of Quarterly Financial Information [Abstract]
Net sales and revenue (a)	$127,651	[1]	$138,424	[1]	$150,231	[1]	$155,924	[1]	$146,073	[1]	$166,167	[1]	$175,385	[1]	$178,420	[1]	$572,230	$666,045	$656,589
Gross profit (a)	29,974	[1]	36,491	[1]	38,838	[1]	36,636	[1]	26,344	[1]	18,025	[1]	10,897	[1]	9,022	[1]	141,939	64,288	13,802
Net income	24,207		28,589		26,718		24,200		17,933		11,478		6,745		4,073		103,714	40,229	-1,588
Net income attributable to REX common shareholders	$20,348		$23,340		$21,907		$21,742		$15,874		$9,867		$5,825		$3,507		$87,337	$35,073	($2,295)
Basic net income per share attributable to REX common shareholders (in Dollars per share)	$2.55		$2.86		$2.68		$2.68		$1.96		$1.21		$0.71		$0.43		$10.77	$4.31	($0.28)
Diluted net income per share attributable to REX common shareholders (in Dollars per share)	$2.55		$2.86		$2.68		$2.67		$1.95	[2]	$1.21	[2]	$0.71	[2]	$0.43	[2]	$10.76	$4.29	($0.28)
[1]	Amounts differ from those previously reported as a result of retail operations and certain real estate assets sold being reclassified as discontinued operations and other reclassifications.
[2]	The total of the quarterly net income per share amounts do not equal the annual net loss or income per share amount due to the impact of varying amounts of shares and options outstanding during the year.

RELATED_PARTIES_Details

RELATED PARTIES (Details) (One Earth Energy And Nu Gen Energy [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
One Earth Energy And Nu Gen Energy [Member]
RELATED PARTIES (Details) [Line Items]
Related Party Transaction, Purchases from Related Party	$164.70	$262.40

Schedule_II_VALUATION_AND_QUAL1

Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
2015:00:00
Balance	$2,017,000	$1,891,000	$1,676,000
Additions Charged to Cost and Expenses	-265,000	126,000	215,000
Deductions Charges for Which Reserves Were Created	265,000	-126,000	-215,000
Balance	$1,752,000	$2,017,000	$1,891,000