Natural Gas Producing Activities (Unaudited) - Schedule of the Entity's Proved and Unproved Reserves (Details)	12 Months Ended
	Dec. 31, 2019 MBbls MMcf	Dec. 31, 2018 MBbls MMcf	Dec. 31, 2017 MBbls MMcf
Proved developed and undeveloped reserves:
Balance at January 1	21,816,776	21,445,667	13,508,407
Revision of previous estimates	(4,907,239)	(1,124,904)	(2,766,981)
Purchase	0	0	9,389,638
Sale	0	(1,748,557)	(2,646)
Extensions, discoveries and other additions	2,067,753	4,739,233	2,225,141
Production	(1,507,896)	(1,494,663)	(907,892)
Balance at December 31	17,469,394	21,816,776	21,445,667
Proved developed reserves:
Balance at January 1	11,550,161	11,297,956	6,842,958
Balance at December 31	12,443,987	11,550,161	11,297,956
Proved undeveloped reserves:
Balance at January 1	10,266,615	10,147,711	6,665,449
Balance at December 31	5,025,407	10,266,615	10,147,711
Natural Gas
Proved developed and undeveloped reserves:
Balance at January 1	20,805,452	19,830,236	12,331,867
Revision of previous estimates	(4,722,799)	(960,285)	(2,760,467)
Purchase	0	0	8,890,145
Sale	0	(1,331,391)	(1,210)
Extensions, discoveries and other additions	2,029,683	4,659,835	2,164,578
Production	(1,435,134)	(1,392,943)	(794,677)
Balance at December 31	16,677,202	20,805,452	19,830,236
Proved developed reserves:
Balance at January 1	10,887,953	10,152,543	6,074,958
Balance at December 31	11,811,521	10,887,953	10,152,543
Proved undeveloped reserves:
Balance at January 1	9,917,499	9,677,693	6,256,909
Balance at December 31	4,865,681	9,917,499	9,677,693
Natural Gas Liquids
Reserve Quantities [Line Items]
Million cubic feet per thousand barrel	6
Proved developed and undeveloped reserves:
Balance at January 1	162,395	258,507	189,695
Revision of previous estimates	(30,312)	(33,653)	(6,189)
Purchase	0	0	82,894
Sale	0	(59,080)	(100)
Extensions, discoveries and other additions	6,177	12,895	10,084
Production	(11,305)	(16,274)	(17,877)
Balance at December 31	126,955	162,395	258,507
Proved developed reserves:
Balance at January 1	106,879	180,170	121,605
Balance at December 31	100,945	106,879	180,170
Proved undeveloped reserves:
Balance at January 1	55,516	78,337	68,090
Balance at December 31	26,010	55,516	78,337
Oil
Reserve Quantities [Line Items]
Million cubic feet per thousand barrel	6
Proved developed and undeveloped reserves:
Balance at January 1 | MBbls	6,159	10,731	6,395
Revision of previous estimates | MBbls	(428)	6,217	5,103
Purchase | MBbls	0	0	355
Sale | MBbls	0	(10,447)	(139)
Extensions, discoveries and other additions | MBbls	168	338	9
Production | MBbls	(822)	(680)	(992)
Balance at December 31 | MBbls	5,077	6,159	10,731
Proved developed reserves:
Balance at January 1 | MBbls	3,489	10,731	6,395
Balance at December 31 | MBbls	4,466	3,489	10,731
Proved undeveloped reserves:
Balance at January 1 | MBbls	2,670	0	0
Balance at December 31 | MBbls	611	2,670	0