INVESTMENTS AND DEPOSITS (Details) - Schedule of Equity Method Investments (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Schedule of Equity Method Investments [Line Items]
Equity Method Securities, Ownership percentage			48.00%
Total Equity Method Securities, Carrying Amount	$ 71,189	$ 59,959
Big River [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Securities, Ownership percentage	10.00%
Total Equity Method Securities, Carrying Amount	40,042	32,438
Patriot [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Securities, Ownership percentage	27.00%
Total Equity Method Securities, Carrying Amount	$ 31,147	$ 27,521