Investments (Details) - Schedule of Income Recognized from Equity Method Investments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments	$ 1,838	$ 1,314	$ 3,257	$ 7,857
Big River [Member]
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments	$ 1,838	$ 1,314	$ 3,257	4,910
Patriot [Member]
Investments (Details) - Schedule of Income Recognized from Equity Method Investments [Line Items]
Income From Equity Method Investments				$ 2,947