Commitments and Contingencies - Additional Information (Detail) $ in Millions		12 Months Ended
	Dec. 15, 2021 USD ($) agreement	Dec. 31, 2021 USD ($) $ / bbl	Dec. 31, 2020 USD ($)	Nov. 05, 2021 item
Commitments and Contingencies Additional Textual [Abstract]
Remaining environmental accrued liability recorded		$ 0.0	$ 0.0
Obligatory monthly deposit into sinking fund account per barrel of oil | $ / bbl		0.25
Number of escrow funding agreements | agreement	2
Sinking fund account maximum value upon which obligation ceases	$ 172.6	$ 4.3
Beta's decommissioning obligations, cash		0.3
Beta's decommissioning obligations, full supported by surety bonds		161.3
Rent expense		7.6	8.3
Commitment fee expense		1.6	2.1
Commitment fee/expense		2.0	$ 1.8
Pending Litigation | Southern California Pipeline Incident and Oil Release
Commitments and Contingencies Additional Textual [Abstract]
Number of putative class action suit filed | item				14
SPBPC Collateral Contractual pipeline and surface facilities abandonment [Member]
Commitments and Contingencies Additional Textual [Abstract]
Restricted Investment - decommissioning of offshore production facilities		$ 4.3