Name:	lpi_PerformanceMultipleWeightAbsoluteTotalShareholderReturnFactor
Namespace Prefix:	lpi_
Data Type:	num:percentItemType
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Period Type:	duration

In computing the performance multiple used to determine the actual number of shares to be awarded under a grant of performance share awards, the weight given to the relative total shareholder return factor over the specified performance period.

No definition available.

Name:	lpi_PerformanceMultipleWeightRelativeTotalShareholderReturnFactor
Namespace Prefix:	lpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

In computing the performance multiple used to determine the actual number of shares to be awarded under a grant of performance share awards, the weight given to the return on average capital employed factor over the specified performance period.

No definition available.

Name:	lpi_PerformanceMultipleWeightReturnOnAverageCapitalEmployedFactor
Namespace Prefix:	lpi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_AwardTypeAxis=lpi_PerformanceUnitAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardDateAxis=lpi_March052020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=lpi_PerformanceUnitAwardsWithMarketCriteriaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: