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Supplemental Oil and Gas Disclosures - Schedule of Estimated Proved Reserves at Net Ownership Interest (Details)
 12 Months Ended
Dec. 31, 2020
MBoe
MMBoe
MBbls
MMcf
Dec. 31, 2019
MBoe
MMBoe
MBbls
MMcf
Dec. 31, 2018
MBoe
MMBoe
MBbls
MMcf
Reserve Quantities [Line Items]      
Total proved reserves, beginning balance | MMBoe 10.0 51.1  
Revision of previous estimates | MMBoe (24.2) (9.7)  
Production | MMBoe (20.0) (19.0) (16.7)
Purchases of reserves | MMBoe     62.8
Extensions and discoveries | MMBoe   15.7 5.6
Total proved reserves, ending balance | MMBoe 21.3 10.0 51.1
Oil (MBbls)      
Reserve Quantities [Line Items]      
Total proved reserves, beginning balance 106,754 112,539 72,804
Revision of previous estimates (14,633) (5,553) 2,595
Production (13,665) (13,844) (11,771)
Purchases of reserves 26,903 2,094 44,788
Extensions and discoveries 3,948 11,518 4,123
Total proved reserves, ending balance 109,307 106,754 112,539
Total proved developed reserves 85,007 72,016 85,530
Total proved undeveloped reserves 24,300 34,738 27,009
Gas (MMcf)      
Reserve Quantities [Line Items]      
Total proved reserves, beginning balance | MMcf 155,998 171,024 127,656
Revision of previous estimates | MMcf (56,358) (15,898) (37,933)
Production | MMcf (28,652) (23,306) (22,771)
Purchases of reserves | MMcf 181,872 2,626 95,661
Extensions and discoveries | MMcf 4,348 21,552 8,411
Total proved reserves, ending balance | MMcf 257,208 155,998 171,024
Total proved developed reserves | MMcf 204,054 115,381 131,364
Total proved undeveloped reserves | MMcf 53,154 40,617 39,660
NGL (MBbls)      
Reserve Quantities [Line Items]      
Total proved reserves, beginning balance 8,981 10,696 6,547
Revision of previous estimates (168) (1,237) 3,187
Production (1,559) (1,228) (1,176)
Purchases of reserves 3,528 130 2,074
Extensions and discoveries 76 620 64
Total proved reserves, ending balance 10,858 8,981 10,696
Total proved developed reserves 8,104 6,733 8,104
Total proved undeveloped reserves 2,754 2,248 2,592
Oil Equivalent (MBoe)      
Reserve Quantities [Line Items]      
Total proved reserves, beginning balance | MBoe 141,735 151,739 100,625
Revision of previous estimates | MBoe (24,195) (9,440) (539)
Production | MBoe (19,999) (18,956) (16,742)
Purchases of reserves | MBoe 60,743 2,662 62,806
Extensions and discoveries | MBoe 4,749 15,730 5,589
Total proved reserves, ending balance | MBoe 163,033 141,735 151,739
Total proved developed reserves | MBoe 127,120 97,979 115,528
Total proved undeveloped reserves | MBoe 35,913 43,756 36,211