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Fair Value Measurement (Tables)
 9 Months Ended
Sep. 30, 2012
Fair Value Disclosures [Abstract]  
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis
The following table sets forth the Company’s assets and liabilities that are measured at fair value on a recurring basis at the date indicated:
 
 
Fair Value Measurements at
September 30, 2012
 
 
Fair Value Total
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
 
  Commodity derivatives
 
$
6,589

 
$
—

 
$
6,589

 
$
—

Total
 
$
6,589

 
$
—

 
$
6,589

 
$
—

Liabilities:
 
 

 
 

 
 

 
 

  Commodity derivatives
 
$
15,093

 
$
—

 
$
15,093

 
$
—

  Interest-rate swap derivatives
 
80,452

 
—

 
80,452

 
—

Total
 
$
95,545

 
$
—

 
$
95,545

 
$
—