XML 35 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.8

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

X
- Details
Name: | rex_InvestmentsDetailsLineItems
Namespace Prefix: | rex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proportionate share of restricted net assets as of the reporting date. + References No definition available. + Details
Name: | rex_ProportionateShareOfRestrictedNetAssets
Namespace Prefix: | rex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 5 + Details
Name: | us-gaap_EquityMethodInvestmentDividendsOrDistributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6462270&loc=d3e57205-112772 + Details
Name: | us-gaap_RetainedEarningsUndistributedEarningsFromEquityMethodInvestees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant