Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable-Related Parties (Narrative) (Details)

v2.4.0.6
Accounts Receivable-Related Parties (Narrative) (Details) (USD $)
0 Months Ended 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Jul. 02, 2008
Everest Operations Management LLC [Member]
Mar. 31, 2012
Everest Operations Management LLC [Member]
Jul. 01, 2008
Everest Operations Management LLC [Member]
Related Party Transaction [Line Items]          
Accounts receivable-related parties $ 37,062,000 $ 34,848,000      
Required notice period, counterparty     30 days    
Percentage of proportionate share of acquisition or divestiture consideration payable to affiliates         1.00%
Reimbursement for general and administrative expenses performed for related party under acquisition team agreement       $ 300,000