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Investments (Details) - Schedule of Income Recognized from Equity Method Investments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments	$ 5,063	$ 7,245	$ 6,543	$ 15,542
Big River [Member]
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments	2,589	4,720	3,596	9,779
Patriot [Member]
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments	$ 2,474	$ 2,525	$ 2,947	$ 5,763

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



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