|
Accounts Receivable-Related Party (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2012
|
Dec. 31, 2011
|
Mar. 13, 2012
Charles E. Davidson [Member]
|
Dec. 31, 2011
Charles E. Davidson [Member]
|
Mar. 01, 2008
Charles E. Davidson [Member]
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Jun. 30, 2012
Everest Operations Management LLC [Member]
|
Jun. 30, 2011
Everest Operations Management LLC [Member]
|
Jun. 30, 2012
Everest Operations Management LLC [Member]
|
Jun. 30, 2011
Everest Operations Management LLC [Member]
|
Jun. 30, 2012
Windsor Niobrara LLC [Member]
|
|
| Related Party Transaction [Line Items] | ||||||||||
| Affiliates Participation Percentage in Acquisition of Leases | 50.00% | |||||||||
| Accounts receivable-related parties | $ 27,182 | $ 4,731 | ||||||||
| Reimbursement for general and administrative expenses performed for related party under acquisition team agreement | $ 208 | $ 401 | $ 533 | $ 401 | ||||||
| Common stock ownership percentage by an individual | 9.50% | 13.30% | ||||||||
| 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 | |||||||||