|
Oil and Natural Gas Properties (Property Acquisitions and Dispositions) (Details) (USD $)
In Thousands, unless otherwise specified |
0 Months Ended | |||
|---|---|---|---|---|
|
Sep. 30, 2012
Northern portion of Midland Basin [Member]
acre
|
Mar. 31, 2012
Borden County Acreage Purchase [Member]
Northern portion of Midland Basin [Member]
acre
|
Jun. 30, 2012
Property Acquisitions [Member]
Southern Reagan County, Texas [Member]
acre
|
Dec. 28, 2012
Shell Offshore Inc. [Member]
Habanero Field (Garden Banks Block 341) [Member]
|
|
| Significant Acquisitions and Disposals [Line Items] | ||||
| Gas and Oil Area, Developed and Undeveloped, Gross | 16,233 | |||
| Gas and Oil Area, Developed and Undeveloped, Net | 14,653 | |||
| Acquired acreage, undeveloped, gross (in acreas) | 8,095 | |||
| Acquired acreage, undeveloped, net (in acres) | 6,964 | |||
| Business Acquisition, Cost of Acquired Entity, Purchase Price | $ 4,835 | $ 14,538 | $ 12,012 | |
| Gas and Oil Area, Developed, Gross | 2,319 | |||
| Gas and Oil Area, Developed, Net | 1,762 | |||
| Sale of Working Interest in Field | 11.25% | |||
| Business Combination, Consideration Transferred, After Customary Purchase Price Adjustments | $ 39,410 |
| X | ||||||||||
|
- Definition
Business Combination, Consideration Transfered, After Customary Purchase Price Adjustments No definition available.
|
| X | ||||||||||
|
- Definition
Gas and Oil Area, Developed and Undeveloped, Gross No definition available.
|
| X | ||||||||||
|
- Definition
Gas and Oil Area, Developed and Undeveloped, Net No definition available.
|
| X | ||||||||||
|
- Definition
Sale of Working Interest in Field No definition available.
|
| X | ||||||||||
|
- Definition
The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Area spaced or assigned to productive wells in which a working interest is owned. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fractional interest owned based on working interests or other economic arrangements of area spaced or assigned to productive wells. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Lease area in which a working interest is owned and on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such area contains proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fractional interest owned based on working interests or other economic arrangements of lease area on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such area contains proved reserves. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|