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Investments (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Oct. 31, 2014 | Oct. 31, 2013 | Jan. 31, 2014
Investments (Details) [Line Items] |  |  |
Proceeds from Equity Method Investment, Dividends or Distributions | $ 19,881,000 | $ 200,000 |
Patriot And Big River [Member] |  |  |
Investments (Details) [Line Items] |  |  |
Retained Earnings, Undistributed Earnings from Equity Method Investees | 37,000,000 |  | 32,600,000
Proceeds from Equity Method Investment, Dividends or Distributions | 19,900,000 | 200,000 |
Proportionate Share of Restricted Net Assets | $ 448,700,000 |  | $ 366,200,000

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- 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
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- 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
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