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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Oil and natural gas properties    
Proved $ 882,946 $ 840,201
Unproved 110,941 74,937
Total oil and natural gas properties 993,887 915,138
Less: accumulated depreciation, depletion and impairment (377,280) (353,030)
Net oil and natural gas properties capitalized costs 616,607 562,108
Land 5,200 5,100
Non-oil and natural gas equipment 159,178 166,010
Buildings and structures 88,503 88,603
Total 252,881 259,713
Less accumulated depreciation and amortization (7,063) (3,889)
Other property, plant and equipment, net 245,818 255,824
Total property, plant and equipment, net $ 862,425 $ 817,932