XML 64 R59.htm IDEA: XBRL DOCUMENT v3.2.0.727
Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Oil and natural gas properties    
Proved $ 12,199,049 $ 11,707,147
Unproved 261,657 290,596
Total oil and natural gas properties 12,460,706 11,997,743
Less: accumulated depreciation, depletion and impairment (9,131,153) (6,359,149)
Net oil and natural gas properties capitalized costs 3,329,553 5,638,594
Land 14,648 16,300
Non-oil and natural gas equipment 482,923 602,392
Buildings and structures 271,367 263,191
Total 768,938 881,883
Less accumulated depreciation and amortization (212,090) (305,420)
Other property, plant and equipment, net 556,848 576,463
Total property, plant and equipment, net $ 3,886,401 $ 6,215,057