Commitments and Contingencies - Additional Information (Detail)				1 Months Ended	4 Months Ended	7 Months Ended	8 Months Ended	12 Months Ended
	Jun. 24, 2019 USD ($)	Nov. 20, 2018 USD ($)	Oct. 05, 2018 USD ($)	Oct. 31, 2017 USD ($)	May 04, 2017 USD ($)	Dec. 31, 2019 USD ($) $ / bbl	Dec. 31, 2017 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / bbl	Dec. 31, 2018 USD ($)
Commitments and Contingencies Additional Textual [Abstract]
Remaining environmental accrued liability recorded						$ 0			$ 0	$ 0
Obligatory monthly deposit into sinking fund account per barrel of oil | $ / bbl						0.25			0.25
Sinking fund account maximum value upon which obligation ceases						$ 4,300,000			$ 4,300,000
Proceeds from Beta Decommissioning Trust account	$ 90,000,000	$ 1,000,000	$ 61,500,000
Beta's decommissioning obligations, previously supported by surety bonds						71,300,000			71,300,000
Beta's decommissioning obligations, cash						90,200,000			90,200,000
Beta's decommissioning obligations, full supported by surety bonds						161,300,000			161,300,000
Beta's decommissioning remaining obligations, cash						300,000			300,000
Rent expense							$ 6,300,000		7,500,000	$ 8,600,000
Commitment fee/expense						700,000
Predecessor [Member]
Commitments and Contingencies Additional Textual [Abstract]
Rent expense					$ 3,100,000
Scenario Forecast [Member]
Commitments and Contingencies Additional Textual [Abstract]
Average estimated fee expected per month								$ 100,000
SPBPC Collateral Contractual pipeline and surface facilities abandonment [Member]
Commitments and Contingencies Additional Textual [Abstract]
Restricted Investment - decommissioning of offshore production facilities						$ 4,600,000			$ 4,600,000
Third-Party Midstream Transaction [Member]
Commitments and Contingencies Additional Textual [Abstract]
Proceeds from divestitures				$ 17,000,000