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INVESTMENTS AND DEPOSITS (Detail) - Schedule of Condensed Balance Sheet (USD $) In Thousands, unless otherwise specified | Jan. 31, 2013 | Jan. 31, 2012 | Dec. 31, 2012 Patriot [Member] | Dec. 31, 2011 Patriot [Member] | Dec. 31, 2012 Big River [Member] | Dec. 31, 2011 Big River [Member]
--- | --- | --- | --- | --- | --- | ---
Current assets | $ 114,927 | $ 127,039 | $ 22,302 | $ 24,972 | $ 139,879 | $ 139,858
Non current assets |  |  | 161,319 | 168,518 | 375,803 | 406,522
Total assets |  |  | 183,621 | 193,490 | 515,682 | 546,380
Current liabilities | 31,459 | 37,241 | 20,201 | 20,966 | 90,865 | 72,798
Long-term liabilities |  |  | 65,867 | 76,103 | 87,301 | 111,928
Total liabilities |  |  | 86,068 | 97,069 | 178,166 | 184,726
Noncontrolling interests | $ 27,931 | $ 29,332 |  |  | $ 29,007 | $ 33,224

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