Leases - Narrative (Details)	Sep. 30, 2020
Leases [Abstract]
Average working interest (as a percent)	97.00%

Average Working Interest, Core Operating Producing Wells, Percent

No definition available.

Name:	lpi_AverageWorkingInterestCoreOperatingProducingWellsPercent
Namespace Prefix:	lpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant