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NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Tables) | 12 Months Ended
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Jan. 31, 2017
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 2015 and 2014 (amounts in thousands, except per-share amounts):
|  | 2015 |
|  | Income |  |  | Shares |  |  | Per Share |
Basic net income per share from continuing operations attributable to REX common shareholders |  | $ | 31,436 |  |  |  | 7,297 |  |  | $ | 4.31 |
Effect of restricted stock |  |  |  |  |  |  | 10 |  |  |  |  |
Diluted net income per share from continuing operations attributable to REX common shareholders |  | $ | 31,436 |  |  |  | 7,307 |  |  | $ | 4.30 |
|  | 2014 |
|  | Income |  |  | Shares |  |  | Per Share |
Basic net income per share from continuing operations attributable to REX common shareholders |  | $ | 86,776 |  |  |  | 8,109 |  |  | $ | 10.70 |
Effect of stock options |  |  |  |  |  |  | 9 |  |  |  |  |
Diluted net income per share from continuing operations attributable to REX common shareholders |  | $ | 86,776 |  |  |  | 8,118 |  |  | $ | 10.69 |

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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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