Investments (Details) - Schedule of Financial information For Equity Method Investment (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Patriot [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	$ 80,409	$ 94,093
Gross profit	13,785	5,142
Income from continuing operations	12,195	3,599
Net income	12,195	3,599
Big River [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	280,423	294,628
Gross profit	83,833	15,619
Income from continuing operations	52,121	6,632
Net income	$ 52,121	$ 6,632