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Income Per Share from Continuing Operations Attributable to REX Common Shareholders (Tables) | 9 Months Ended
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Oct. 31, 2014
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table reconciles the computation of basic and diluted net income per share from continuing operations for the periods presented (in thousands, except per share amounts):
|  | Three Months Ended |  |  | Three Months Ended |
|  | October 31, 2014 |  |  | October 31, 2013 |
|  | Income |  |  | Shares |  |  | Per Share |  |  | Income |  |  | Shares |  |  | Per Share |
Basic income per share from continuing operations attributable to REX common shareholders |  | $ | 23,202 |  |  |  | 8,170 |  |  | $ | 2.84 |  |  | $ | 8,980 |  |  |  | 8,140 |  |  | $ | 1.10 |
Effect of stock options |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | 39 |  |  |  |  |
Diluted income per share from continuing operations attributable to REX common shareholders |  | $ | 23,202 |  |  |  | 8,170 |  |  | $ | 2.84 |  |  | $ | 8,980 |  |  |  | 8,179 |  |  | $ | 1.10 |
|  | Nine Months Ended |  |  | Nine Months Ended |
|  | October 31, 2014 |  |  | October 31, 2013 |
|  | Income |  |  | Shares |  |  | Per Share |  |  | Income |  |  | Shares |  |  | Per Share |
Basic income per share from continuing operations attributable to REX common shareholders |  | $ | 66,848 |  |  |  | 8,157 |  |  | $ | 8.19 |  |  | $ | 17,911 |  |  |  | 8,154 |  |  | $ | 2.19 |
Effect of stock options |  |  | — |  |  |  | 11 |  |  |  |  |  |  |  | — |  |  |  | 43 |  |  |  |  |
Diluted income per share from continuing operations attributable to REX common shareholders |  | $ | 66,848 |  |  |  | 8,168 |  |  | $ | 8.18 |  |  | $ | 17,911 |  |  |  | 8,197 |  |  | $ | 2.18 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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