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Energy and Related Sales, Net
12 Months Ended
Dec. 31, 2015
Text Block [Abstract]  
Energy and Related Sales, Net
4. ENERGY AND RELATED SALES, NET

We sell excess power generated by the Spring Grove, PA facility. We also sell renewable energy credits generated by the Spring Grove, PA and Chillicothe, OH facilities representing sales of certified credits earned related to burning renewable sources of energy such as black liquor and wood waste.

The following table summarizes this activity for each of the past three years:

 

     Year ended December 31  

In thousands

     2015        2014        2013   

Energy sales

   $ 5,315      $ 11,886      $ 8,189   

Costs to produce

     (4,428     (6,204     (6,784

Net

     887        5,682        1,405   

Renewable energy credits

     4,777        2,245        1,748   

Total

   $ 5,664      $ 7,927      $ 3,153