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Accounts Receivable - Related Parties | 6 Months Ended
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Jun. 30, 2013
Receivables [Abstract] |
Accounts Receivable - Related Parties | ACCOUNTS RECEIVABLE—RELATED PARTIES Included in the accompanying consolidated balance sheets as of June 30, 2013 and December 31, 2012 are amounts receivable from related parties of the Company. These receivables consist primarily of amounts billed by the Company to related parties as operator of such parties' Colorado and Ohio oil and natural gas properties. At June 30, 2013 and December 31, 2012, these receivables totaled $36.8 million and $34.8 million, respectively. Effective July 1, 2008, the Company entered into an acquisition team agreement with Everest Operations Management LLC ("Everest") to identify and evaluate potential oil and gas properties in which the Company and Everest or its affiliates may wish to invest. Upon a successful closing of an acquisition or divestiture, the party identifying the acquisition or divestiture is entitled to receive a fee from the other party and its affiliates, if applicable, participating in such closing. The fee is equal to 1% of the party’s proportionate share of the acquisition or divestiture consideration. The agreement may be terminated by either party upon 30 days notice. Affiliates of Everest were billed approximately $0.2 million and $0.5 million under this acquisition team agreement during the three and six months ended June 30, 2012, which amounts are reflected as a reduction of general and administrative expenses in the consolidated statements of operations. Amounts billed under the acquisition team agreement during the three and six months ended June 30, 2013 were immaterial.

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