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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2013 Center Operator | Dec. 31, 2012 Operator | Dec. 31, 2011 Operator | Dec. 31, 2010
Marketable Securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains in the marketable securities |  |  |  |  |  |  |  |  |  |  |  |  | $ 45,000 | $ 159,000 |  |
Accounts Receivable [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bad debt expense related to multifamily housing project |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 13,000 |  |
Reserve for uncollectable receivables | 0 |  |  |  | 0 |  |  |  |  |  |  |  | 0 | 0 |  |
Valuation of Equity Method Investment [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash impairment charge on equity method investment |  |  |  |  |  |  |  |  |  |  |  |  | 2,160,000 | 0 | 0 |
Equity method investment at carrying value | 0 |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Oil & Gas properties [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unproved | 7,478,000 |  |  |  | 9,169,000 |  |  |  |  |  |  |  | 7,478,000 | 9,169,000 |  |
Wells in progress | 0 |  |  |  | 0 |  |  |  |  |  |  |  | 0 | 0 |  |
Proved | 136,521,000 |  |  |  | 119,919,000 |  |  |  |  |  |  |  | 136,521,000 | 119,919,000 |  |
Oil & Gas properties | 143,999,000 |  |  |  | 129,088,000 |  |  |  |  |  |  |  | 143,999,000 | 129,088,000 |  |
Less accumulated depreciation depletion and amortization | (57,077,000) |  |  |  | (43,454,000) |  |  |  |  |  |  |  | (57,077,000) | (43,454,000) |  |
Net book value | 86,922,000 |  |  |  | 85,634,000 |  |  |  |  |  |  |  | 86,922,000 | 85,634,000 |  |
Mining properties | 20,739,000 |  |  |  | 20,739,000 |  |  |  |  |  |  |  | 20,739,000 | 20,739,000 |  |
Building, land and equipment | 8,334,000 |  |  |  | 8,469,000 |  |  |  |  |  |  |  | 8,334,000 | 8,469,000 |  |
Less accumulated depreciation | (4,135,000) |  |  |  | (4,034,000) |  |  |  |  |  |  |  | (4,135,000) | (4,034,000) |  |
Net book value | 4,199,000 |  |  |  | 4,435,000 |  |  |  |  |  |  |  | 4,199,000 | 4,435,000 |  |
Net properties and equipment | 111,860,000 |  |  |  | 110,808,000 |  |  |  |  |  |  |  | 111,860,000 | 110,808,000 |  |
Oil and Gas Properties [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized costs excluded from amortized cost pool | 7,478,000 |  |  |  | 9,200,000 |  |  |  |  |  |  |  | 7,478,000 | 9,200,000 |  |
Capitalized costs related to unevaluated properties included in the amortization base | 0 |  |  |  | 0 |  |  |  |  |  |  |  | 0 | 0 |  |
Period after which costs will be added to the full cost amortization pool for properties |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |
Percentage of discount used for future net revenue (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Period for calculating unescalated average prices prior to the end of reporting period |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |
Number of cost centers for quarterly ceiling test for oil and gas |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Price per barrel for oil at ceiling test (in dollars per barrel) |  |  |  |  |  |  |  |  |  |  |  |  | 96.78 |  |  |
Price for natural gas at ceiling test (dollars per MMbtu) |  |  |  |  |  |  |  |  |  |  |  |  | 3.67 |  |  |
Proved property impairments |  |  |  |  |  |  |  |  |  |  |  |  | 5,828,000 | 5,189,000 | 0 |
Mineral Properties [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs associated with Mount Emmons beginning of year |  |  |  | 20,739,000 |  |  |  |  |  |  |  |  | 20,739,000 |  |  |
Development costs |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0
Costs at the end of the period | 20,739,000 |  |  |  | 20,739,000 |  |  |  |  |  |  |  | 20,739,000 | 20,739,000 |  |
Reconciliation of total liability for asset retirement obligations [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning asset retirement obligation |  |  |  | 686,000 |  |  |  | 510,000 |  |  |  |  | 686,000 | 510,000 |  |
Accretion of discount |  |  |  |  |  |  |  |  |  |  |  |  | 38,000 | 34,000 |  |
Liabilities incurred |  |  |  |  |  |  |  |  |  |  |  |  | 131,000 | 142,000 |  |
Liabilities settled |  |  |  |  |  |  |  |  |  |  |  |  | (43,000) | 0 |  |
Ending asset retirement obligation | 812,000 |  |  |  | 686,000 |  |  |  | 510,000 |  |  |  | 812,000 | 686,000 | 510,000 |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale | 0 |  |  |  | 17,051,000 |  |  |  |  |  |  |  | 0 | 17,051,000 |  |
Liabilities held for sale | 0 |  |  |  | 10,022,000 |  |  |  |  |  |  |  | 0 | 10,022,000 |  |
Revenue Recognition [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of payment received after date of production, minimum |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |
Period of payment received after date of production, maximum |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of major operators |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 2 | 1 |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 1.66% |  | 1.77% |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  | 6 years |  | 6 years |
Expected volatility (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 62.59% |  | 59.64% |
Expected dividend yield (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 0.00% |
Weighted-average dilutive and anti-dilutive securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive (in shares) | 27,682,602 | 27,682,602 | 27,682,272 | 27,667,102 | 27,475,813 | 27,468,355 | 27,460,483 | 27,438,584 | 27,288,470 | 27,862,098 | 27,866,544 | 27,186,438 |  |  |  |
Shares held by the ESOP (in shares) | 877,399 |  |  |  | 824,123 |  |  |  | 684,643 |  |  |  | 877,399 | 824,123 | 684,643 |
Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate, minimum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.82% |  |
Risk free interest rate (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 1.66% |  | 1.77% |
Risk free interest rate, maximum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.41% |  |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  | 6 years |  | 6 years |
Expected volatility, minimum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 61.87% |  |
Expected volatility (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 62.59% |  | 59.64% |
Expected volatility, maximum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 63.59% |  |
Expected dividend yield (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  | 0.00% |
Weighted-average dilutive and anti-dilutive securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |
Anti-dilutive (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 872,185,000 | 0 | 969,631,000 |
Statoil and Zavanna [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit risk, percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 38.00% | 57.00% |  |
Contango Oil & Gas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit risk, percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 32.00% |  |  |
NGL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit risk, percentage (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  | 18.00% | 32.00% | 74.00% |
Remington Village [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale | 0 |  |  |  | 15,167,000 |  |  |  |  |  |  |  | 0 | 15,167,000 |  |
Liabilities held for sale | 0 |  |  |  | 10,022,000 |  |  |  |  |  |  |  | 0 | 10,022,000 |  |
Corporate Aircraft and Facilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale | 0 |  |  |  | 1,884,000 |  |  |  |  |  |  |  | 0 | 1,884,000 |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate, minimum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.82% |  |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Expected volatility, minimum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 61.87% |  |
Minimum [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate, maximum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.41% |  |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |
Expected volatility, maximum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  | 63.59% |  |
Maximum [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumptions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected lives |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |
Mt. Emmons Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Oil & Gas properties [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining properties | 20,739,000 |  |  |  | 20,739,000 |  |  |  |  |  |  |  | 20,739,000 | 20,739,000 |  |
Mineral Properties [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs associated with Mount Emmons beginning of year |  |  |  | 20,739,000 |  |  |  | 20,739,000 |  |  |  |  | 20,739,000 | 20,739,000 |  |
Development costs |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |
Costs at the end of the period | 20,739,000 |  |  |  | 20,739,000 |  |  |  |  |  |  |  | 20,739,000 | 20,739,000 |  |
Mining Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of total liability for asset retirement obligations [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending asset retirement obligation | 175,000 |  |  |  | 162,000 |  |  |  |  |  |  |  | 175,000 | 162,000 |  |
Oil and Gas Wells [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of total liability for asset retirement obligations [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending asset retirement obligation | $ 637,000 |  |  |  | $ 524,000 |  |  |  |  |  |  |  | $ 637,000 | $ 524,000 |  |
Machinery and Equipment [Member] | Office Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Machinery and Equipment [Member] | Office Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Machinery and Equipment [Member] | Field Tools and Hand Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |
Machinery and Equipment [Member] | Field Tools and Hand Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |
Machinery and Equipment [Member] | Vehicles and Trucks [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Machinery and Equipment [Member] | Vehicles and Trucks [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |
Machinery and Equipment [Member] | Heavy Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |
Machinery and Equipment [Member] | Heavy Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |
Buildings and Improvements [Member] | Service Buildings [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |
Buildings and Improvements [Member] | Corporate Headquarter Building [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 45 years |  |  |
Standard Steam Trust LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (in hundredths) | 19.54% |  |  |  |  |  |  |  |  |  |  |  | 19.54% |  |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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