Commitments and Contingencies - Additional Information (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 31, 2024 USD ($) agreement	Dec. 31, 2021 USD ($) agreement	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Commitments and Contingencies:
Remaining environmental accrued liability recorded			$ 0		$ 0		$ 0
Total revenues			69,858	$ 76,770	225,660	$ 228,611
Sinking fund account maximum value upon which obligation ceases		$ 172,600	4,300		4,300
Restricted Investment - decommissioning of offshore production facilities			4,500		4,500
Beta's decommissioning obligations, full supported by surety bonds			161,300		161,300
Beta's decommissioning obligations, cash			22,900		22,900
Number of escrow funding agreements | agreement		2
Number of escrow funding agreements amended | agreement	1
Escrow funded yearly amount	$ 8,000	$ 14,800
Oil and natural gas sales
Commitments and Contingencies:
Total revenues			68,135	76,403	215,803	210,080
Other income
Commitments and Contingencies:
Total revenues			1,723	$ 367	9,857	$ 18,531
Prior period adjustment
Commitments and Contingencies:
Revenue payables in suspense			$ (2,800)		$ (2,800)
Error correction, type extensible enumeration					ampy:RevisionOfImproperlyClassifiedCertainNonOperatedRevenueMember
Prior period adjustment | Oil and natural gas sales
Commitments and Contingencies:
Total revenues					$ 2,200
Prior period adjustment | Other income
Commitments and Contingencies:
Total revenues					$ 600