Risk Concentrations (Details)	6 Months Ended
Jun. 30, 2024
Risks and Uncertainties [Abstract]
Percentage of wells operated by third-party operating partners	100.00%

Percentage of Partnership's wells are operated by third-party operating partners.

No definition available.

Name:	grnt_PercentageOfWellsOperatedByThirdPartyOperatingPartners
Namespace Prefix:	grnt_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration