Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Divestitures (Purchase Price Allocation for Acquisition of Properties) (Detail)

v2.4.0.6
Acquisitions and Divestitures (Purchase Price Allocation for Acquisition of Properties) (Detail) (USD $)
In Thousands, unless otherwise specified
Aug. 10, 2011
Fairway Properties [Member]
May 11, 2011
Yellow Rose Properties [Member]
Business Acquisition [Line Items]    
Oil and natural gas properties and equipment $ 47,993 $ 396,902
Asset retirement obligations - non-current (7,812) (382)
Long-term liability   (2,143)
Total cash paid $ 40,181 $ 394,377