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OTHER INVESTMENTS (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Other Investments [Abstract] |  |  |
Loss on Sale of Investments | $ 0 | $ 0 | $ (1,821)
Distribution from EnerTech | $ 0 | $ 0 | $ 135

X
- Definition The amount of cash distributions paid to a common shareholder or unit-holder by a LLC or LP. + References No definition available. + Details
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X
- Definition The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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