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GEOTHERMAL (Details)	Dec. 31, 2012	Dec. 31, 2011
Noncontrolling Interest [Line Items]
Ownership percentage (in hundredths)	19.54%	22.40%

X

- Details

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X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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