Quarterly report pursuant to Section 13 or 15(d)

Oil and Natural Gas Properties (Details)

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Oil and Natural Gas Properties (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2014
Reagan and Upton Counties Acreage Purchase [Member]
acre
Jun. 30, 2014
Northern Midland Basin [Member]
acre
Oil And Natural Gas Properties [Line Items]    
Net acres 1,527 9,480
Acquisition price $ 8,200  
Working interest 100.00%  
revenue interest 78.00%  
Net acres to expire   8,028
Amount transferred from unevaluated properties to full cost pool   $ 12,940