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Investments (Details) - Schedule of Financial Information For Equity Method Investment (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Patriot [Member]
Investments (Details) - Schedule of Financial Information For Equity Method Investment [Line Items]
Net sales and revenue	$ 98,776	$ 100,231	$ 295,250	$ 271,620
Gross profit (loss)	8,312	8,897	24,500	10,105
Income (loss) from continuing operations	6,610	7,678	19,761	5,032
Net income (loss)	6,610	7,678	19,761	5,032
Big River [Member]
Investments (Details) - Schedule of Financial Information For Equity Method Investment [Line Items]
Net sales and revenue	339,720	306,808	970,309	856,659
Gross profit (loss)	30,957	(14,116)	76,639	8,399
Income (loss) from continuing operations	16,235	(5,109)	44,415	1,677
Net income (loss)	$ 16,235	$ (5,109)	$ 44,415	$ 1,677

The amount of gross profit (loss) reported by an equity method investment of the entity.

The amount of net income (loss) reported by an equity method investment of the entity.