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INVESTMENT IN STANDARD STEAM TRUST, LLC (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Noncontrolling Interest [Line Items] |  |  |
Equity gain (loss) in unconsolidated investment | $ (104,000) | $ (359,000) | $ (211,000)
Impairment of equity investment | 2,160,000 | 0 | 0
Standard Steam Trust LLC [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Ownership percentage (in hundredths) | 19.54% |  |
Equity gain (loss) in unconsolidated investment | (104,000) |  |
Impairment of equity investment | $ 2,200,000 |  |

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