FRESH-START ACCOUNTING - FV adjustments to oil and natural gas properties (Details) $ in Millions		3 Months Ended	9 Months Ended
	Oct. 01, 2019 USD ($)	Dec. 31, 2019	Oct. 01, 2019 $ / MMBTU $ / bbl
Oil and natural gas properties (full cost method):
Debt issuance cost expensed | $	$ 10.2
Write Off Of Prepaid Premium Expenses | $	$ 1.2
Incremental borrowing rate		3.70%	4.83%
Fresh Start Adjustments
Oil and natural gas properties (full cost method):
Weighted average cost of capital rate (as a percent)			10.0
Development plan in years			5 years
Weighted average commodity price of oil (in dollars per barrel) | $ / bbl			71.51
Weighted average commodity price of natural gas (in dollars per Mmbtu) | $ / MMBTU			3.37
Weighted average commodity price of natural gas liquids (in dollars per barrel) | $ / bbl			29.50