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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) | 12 Months Ended
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Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Number of Ethanol Entities Under Ownership Interest | 4 |  |
Number of State Under Which Real Estate Portfolio Manage | 6 |  |
Number of Reportable Segments | 2 |  |
Maximum Maturity Period of Short Term Investments | 3 months |  |
Concentration Risk Number of Customer | 4 | 4 | 3
Concentration Risk, Percentage | 82.00% | 81.00% | 78.00%
Inventory Write-down | $ 0 | $ 466,000 |
Property, Plant and Equipment, Depreciation Methods | Depreciation is computed using the straight-line method |  |
Related Parties Amount in Cost of Sales | 55,000 |  |
Impairment of Real Estate | 55,000 | 562,000 | 1,227,000
Estimated Cash Flow Percentage | 25.00% |  |
EstimatedFutureCashFlowsTerms | six |  |
Depreciation | 16,915,000 | 16,081,000 | 11,721,000
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting | 20.00% |  |
Interest Paid | 3,492,000 | 4,449,000 | 3,174,000
Derivative Settlement on Interest Rate Swap | 1,687,000 | 1,816,000 | 2,436,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) | 0 | 0 | 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | 1,100,000 | 1,800,000 | 3,200,000
Deferred Tax Expense from Stock Options Exercised | 400,000 | 200,000 | 1,200,000
Building and Building Improvements [Member] | Minimum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 15 |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 40 |  |
Fixtures And Equipment [Member] | Minimum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 3 |  |
Fixtures And Equipment [Member] | Maximum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 20 |  |
Cost of Sales [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Impairment of Real Estate |  | 133,000 | 11,000
Discontinued Operation [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Impairment of Real Estate |  | $ 429,000 | $ 1,216,000
Customer Concentration Risk [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 91.00% | 80.00% |
Minimum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Extended Period of Warranty | 12 months |  |
Maximum [Member] |  |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items] |  |  |
Extended Period of Warranty | 60 months |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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