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Oil and Natural Gas Properties (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Oil and Natural Gas Properties [Abstract]    
Proved properties $ 3,541,516 $ 3,397,785
Unproved properties 1,415,874 1,415,874
Oil and natural gas properties, gross 4,957,390 4,813,659
Less accumulated depletion and amortization (76,083) (10,394)
Oil and natural gas properties, net $ 4,881,307 $ 4,803,265