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Investments (Tables) | 6 Months Ended
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Jul. 31, 2013
Investments And Deposits [Abstract] |
Equity Method Investments [Table Text Block] | The following table summarizes equity method investments at July 31, 2013 and January 31, 2013 (amounts in thousands):
Entity |  |  | Ownership Percentage |  |  |  | Carrying Amount July 31, 2013 |  |  |  | Carrying Amount January 31, 2013 |
Big River |  |  | 10 | % |  | $ | 34,973 |  |  | $ | 32,438 |
Patriot |  |  | 27 | % |  |  | 30,942 |  |  |  | 27,521 |
Total Equity Method Investments |  |  |  |  |  | $ | 65,915 |  |  | $ | 59,959 |
Schedule of Income Loss Recognized From Equity Method Investments [Table Text Block] | The following table summarizes income or (loss) recognized from equity method investments for the periods presented (amounts in thousands):
|  |  | Three Months Ended July 31, |  |  |  | Six Months Ended July 31, |
|  |  | 2013 |  |  |  | 2012 |  |  |  | 2013 |  |  |  | 2012 |
Big River |  | $ | 2,092 |  |  | $ | 104 |  |  | $ | 2,736 |  |  | $ | 661 |
Patriot |  |  | 2,536 |  |  |  | (585 | ) |  |  | 3,491 |  |  |  | (700 | )
Total |  | $ | 4,628 |  |  | $ | (481 | ) |  | $ | 6,227 |  |  | $ | (39 | )
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 three and six months ended July 31, 2013 and 2012 (amounts in thousands):
|  | Three Months Ended July 31, 2013 |  |  | Three Months Ended July 31, 2012 |
|  | Patriot |  |  | Big River |  |  | Patriot |  |  | Big River |
Net sales and revenue |  | $ | 102,416 |  |  | $ | 335,961 |  |  | $ | 81,578 |  |  | $ | 258,848 |
Gross profit (loss) |  | $ | 11,046 |  |  | $ | 30,063 |  |  | $ | (569 | ) |  | $ | 8,507 |
Income (loss) from continuing operations |  | $ | 9,552 |  |  | $ | 21,549 |  |  | $ | (2,209 | ) |  | $ | 1,068 |
Net income (loss) |  | $ | 9,552 |  |  | $ | 21,549 |  |  | $ | (2,209 | ) |  | $ | 1,068 |
|  | Six Months Ended July 31, 2013 |  |  | Six Months Ended July 31, 2012 |
|  | Patriot |  |  | Big River |  |  | Patriot |  |  | Big River |
Net sales and revenue |  | $ | 196,474 |  |  | $ | 630,589 |  |  | $ | 171,389 |  |  | $ | 549,851 |
Gross profit |  | $ | 16,189 |  |  | $ | 45,683 |  |  | $ | 1,208 |  |  | $ | 22,515 |
Income (loss) from continuing operations |  | $ | 13,150 |  |  | $ | 28,180 |  |  | $ | (2,645 | ) |  | $ | 6,786 |
Net income (loss) |  | $ | 13,150 |  |  | $ | 28,180 |  |  | $ | (2,645 | ) |  | $ | 6,786 |

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- Definition Tabular disclosure of income loss recognized from equity method investments. + References No definition available. + Details
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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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