Investments (Details) - Schedule of Financial information For Equity Method Investment (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Patriot [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	$ 93,056	$ 98,776	$ 252,592	$ 295,250
Gross profit	17,597	8,312	42,626	24,500
Income from continuing operations	15,843	6,610	37,549	19,761
Net income	15,843	6,610	37,549	19,761
Big River [Member]
Investments (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	260,908	339,720	854,174	970,309
Gross profit	59,426	30,957	183,736	76,639
Income from continuing operations	47,114	16,235	147,853	44,415
Net income	$ 47,114	$ 16,235	$ 147,853	$ 44,415