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Fresh-Start Accounting - Oil and Natural Gas Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Feb. 28, 2017
Components of Oil and Natural Gas Properties
Proved properties	$ 1,361,814	$ 1,073,959	$ 712,400
Unproved properties	313,903	388,034	531,200
Oil and natural gas properties	1,675,717	1,461,993	1,243,600
Less accumulated depletion and amortization	(209,105)	(123,217)	0
Total oil and natural gas properties, net	$ 1,466,612	$ 1,338,776	1,243,600
Previously Reported
Components of Oil and Natural Gas Properties
Proved properties			4,266,843
Unproved properties			764,655
Oil and natural gas properties			5,031,498
Less accumulated depletion and amortization			(2,814,999)
Total oil and natural gas properties, net			$ 2,216,499

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Amount of accumulated depreciation, depletion, amortization and impairment of oil and gas property carried under the successful effort method.

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