3.26.1 html 103 34 1 false 13 0 false 1 false false R1.htm 995100 - Document - Cover Sheet http://xbrl.sec.gov/dei/role/document/Cover Cover Cover 1 false false R2.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 2 false false R3.htm 995443 - Disclosure - Award Timing Disclosure Sheet http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure Award Timing Disclosure Notes 3 false false R4.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 4 false false All Reports Book All Reports egy-20251231.xsd egy-20251231_def.xml egy-20251231_lab.xml egy-20251231_pre.xml tm2612319-1_def14a.htm bc_netincome-pn.jpg bc_standardmeasure-pn.jpg bc_tsr-pn.jpg cv_ibc-pn.jpg cv_ifc-4clr.jpg cv_ofc-pnlr.jpg fc_tsrmodifier-pn.jpg ic_admission-pn.gif ic_date-pn.gif ic_place-pn.gif ic_time-pn.gif lg_vaalcoenergy-pn.jpg pc_ethnic-pn.jpg pc_gender-pn.jpg pc_independence-pn.jpg pc_tenure-pn.jpg ph_andrewlfawthrop-4c.jpg ph_caseydonohue-4c.jpg ph_cathystubbs-4c.jpg ph_edwardlafehr-4c.jpg ph_fabricenzebekale-4clr.jpg ph_georgemaxwell-4c.jpg ph_matthewpowers-4c.jpg ph_ronaldbain-4c.jpg ph_thorpruckl-4c.jpg px_26annualmeetingpg01-bw.jpg px_26annualmeetingpg02-bw.jpg http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true false