Investments (Details) - Schedule of Financial information For Equity Method Investment - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Patriot [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	[1]		$ 93,056	$ 115,614	$ 252,592
Gross profit	[1]		17,597	14,424	42,626
Income from continuing operations	[1]		15,843	11,100	37,549
Net income	[1]		15,843	11,100	37,549
Big River [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue		$ 215,902	260,908	623,900	854,174
Gross profit		22,078	59,426	71,345	183,736
Income from continuing operations		13,540	47,114	50,580	147,853
Net income		$ 13,540	$ 47,114	$ 50,580	$ 147,853

[1] For Patriot, results are for the five month period ended May 31, 2015 as the Company's equity interest in Patriot was sold June 1, 2015.