Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Asset retirement obligation, fair value disclosure	$ 0.1	$ 0.4

Asset Retirement Obligation, Fair Value Disclosure

No definition available.

Name:	rep_AssetRetirementObligationFairValueDisclosure
Namespace Prefix:	rep_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration