Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable-Related Party (Details)

v2.4.0.6
Accounts Receivable-Related Party (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 28, 2012
Charles E. Davidson [Member]
Dec. 31, 2011
Charles E. Davidson [Member]
Mar. 01, 2008
Charles E. Davidson [Member]
Sep. 30, 2012
Everest Operations Management LLC [Member]
Sep. 30, 2011
Everest Operations Management LLC [Member]
Sep. 30, 2012
Everest Operations Management LLC [Member]
Sep. 30, 2011
Everest Operations Management LLC [Member]
Sep. 30, 2012
Windsor Niobrara LLC [Member]
Related Party Transaction [Line Items]                    
Affiliates Participation Percentage in Acquisition of Leases                   50.00%
Accounts receivable-related parties $ 10,915 $ 4,731                
Reimbursement for general and administrative expenses performed for related party under acquisition team agreement           $ 360 $ 466 $ 893 $ 867  
Common Stock Ownership Percentage Per Individual     0.01 0.133            
Percentage of Proportionate Share of the Acquisition or Divestiture Consideration Payable to Affiliates           1.00%   1.00%    
Cancellation of Agreement Required Written Notice Term         60 days          
Cancellation of Agreement Required Wrriten Notice Term, Counterparty         30 days          
Breech of Contract, Cure Period         30 days