Supplemental Oil and Gas Information (Unaudited) - Schedule of Net Reserves (Detail)	12 Months Ended
	Dec. 31, 2021 MMBoe MMcfe MBbls MMcf	Dec. 31, 2020 MBbls MMcf
Oil Reserves [Member]
Supplemental Oil And Gas Reserve Information [Line Items]
Proved developed and undeveloped reserves, Beginning of year	46,676	70,772
Extensions and discoveries	746	291
Production	(3,351)	(3,887)
Sale of minerals in place | MMBoe	(3)
Revision of previous estimates	933	(20,500)
Proved developed and undeveloped reserves, End of year	45,001	46,676
Proved developed reserves, Beginning of year	35,613	53,476
Proved developed reserves, End of year	43,857	35,613
Proved undeveloped reserves, Beginning of year	11,063	17,296
Proved undeveloped reserves, End of year	1,144	11,063
Natural Gas Reserves [Member]
Supplemental Oil And Gas Reserve Information [Line Items]
Proved developed and undeveloped reserves, Beginning of year | MMcf	274,139	377,869
Extensions and discoveries | MMcf	4,283	655
Production | MMcf	(23,808)	(27,473)
Sale of minerals in place | MMcfe	(274)
Revision of previous estimates | MMcf	60,010	(76,912)
Proved developed and undeveloped reserves, End of year | MMcf	314,350	274,139
Proved developed reserves, Beginning of year | MMcf	252,218	320,731
Proved developed reserves, End of year | MMcf	309,794	252,218
Proved undeveloped reserves, Beginning of year | MMcf	21,921	57,138
Proved undeveloped reserves, End of year | MMcf	4,556	21,921
Natural Gas Liquids Reserves [Member]
Supplemental Oil And Gas Reserve Information [Line Items]
Proved developed and undeveloped reserves, Beginning of year	21,484	29,252
Extensions and discoveries	215	61
Production	(1,430)	(1,725)
Sale of minerals in place | MMBoe	(12)
Revision of previous estimates	3,580	(6,104)
Proved developed and undeveloped reserves, End of year	23,837	21,484
Proved developed reserves, Beginning of year	19,009	23,646
Proved developed reserves, End of year	23,574	19,009
Proved undeveloped reserves, Beginning of year	2,475	5,606
Proved undeveloped reserves, End of year	263	2,475
Proved Reserves, Total
Supplemental Oil And Gas Reserve Information [Line Items]
Proved developed and undeveloped reserves, Beginning of year	113,849	163,002
Extensions and discoveries	1,674	461
Production	(8,747)	(10,190)
Sale of minerals in place | MMBoe	(61)
Revision of previous estimates	14,515	(39,424)
Proved developed and undeveloped reserves, End of year	121,230	113,849
Proved developed reserves, Beginning of year	96,658	130,577
Proved developed reserves, End of year	119,063	96,658
Proved undeveloped reserves, Beginning of year	17,191	32,425
Proved undeveloped reserves, End of year	2,167	17,191