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Energy and Related Sales, Net (Tables)

12 Months Ended

Dec. 31, 2012

Energy and Related Sales, Net [Abstract]

Summary of energy and related sales net

In thousands			2012				2011				2010
Energy sales		$	5,284			$	10,992			$	14,296
Costs to produce			(4,187	)			(9,319	)			(10,403	)
Net energy sales			1,097				1,673				3,893
Renewable energy credits			5,903				7,671				6,760
Total energy and related sales, net		$	7,000			$	9,344			$	10,653

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