Property and Equipment, Net (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Oil and natural gas properties, full cost accounting method
Evaluated properties	$ 7,840,616	$ 7,203,482
Accumulated depreciation, depletion, amortization and impairments	(4,062,660)	(2,520,488)
Net evaluated oil and natural gas properties	3,777,956	4,682,994
Unevaluated properties
Unevaluated leasehold and seismic costs	1,596,662	1,843,725
Capitalized interest	166,198	142,399
Total unevaluated properties	1,762,860	1,986,124
Total oil and natural gas properties, net	5,540,816	6,669,118
Other property and equipment	67,883	67,202
Accumulated depreciation	(35,439)	(31,949)
Other property and equipment, net	$ 32,444	$ 35,253

Costs Not Subject To Amortization, Capitalized Interest

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Costs Not Subject To Amortization, Unevaluated Leaseholds And Seismic Costs

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Oil and gas properties, full-cost accounting method:

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The Net Carrying amounts as of the balance sheet date of proved oil and gas properties based on full cost accounting.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities.

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The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs.

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Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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Amount after depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.

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