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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Commitments and Contingencies  
Schedule of commitments for agreements with "take or pay" or other similar commitment provisions

 

 

2012

  $ 122,705  

2013

    10,237  

2014

    1,737  

2015

    1,561  

2016

    1,561  

Thereafter

    5,197  
       

 

  $ 142,998