Allocated Share-based Compensation Expense, Gross

No definition available.

Name:	lpi_AllocatedSharebasedCompensationExpenseGross
Namespace Prefix:	lpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated Probability Of Criteria Being Earned Over Performance Period

+ References

No definition available.

+ Details

Name:	lpi_EstimatedProbabilityOfCriteriaBeingEarnedOverPerformancePeriod
Namespace Prefix:	lpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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 absolute total shareholder return factor over the specified performance period.

+ References

No definition available.

+ Details

Name:	lpi_PerformanceMultipleWeightAbsoluteTotalShareholderReturnFactor
Namespace Prefix:	lpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	lpi_PerformanceMultipleWeightRelativeTotalShareholderReturnFactor
Namespace Prefix:	lpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	lpi_PerformanceMultipleWeightReturnOnAverageCapitalEmployedFactor
Namespace Prefix:	lpi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period, Expense Per Performance Share Award

+ References

No definition available.

+ Details

Name:	lpi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodExpensePerPerformanceShareAward
Namespace Prefix:	lpi_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

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=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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 (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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 (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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 (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_AwardDateAxis=lpi_June32019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=lpi_February282019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

Compensation plans - Performance share awards assumptions used to estimate the fair value (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May 16, 2019	Dec. 31, 2021	Dec. 31, 2019	Mar. 05, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date (in dollars per share)				$ 34.24
Performance share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per performance share award (USD per share)			$ 50.40
Performance share awards \| June 3, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per performance share award (USD per share)		$ 65.94
Expense per performance share award (in dollars per share)		65.94
Performance share awards \| February 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value per performance share award (USD per share)		95.65
Expense per performance share award (in dollars per share)		$ 95.65
Incremental compensation expense	$ 1.0
Performance Shares with Market Criteria \| June 3, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining performance period on grant date		2 years 6 months 29 days
Risk-free interest rate (as a percent)		1.78%
Dividend yield (as a percent)		0.00%
Expected volatility (as a percent)		55.45%
Closing stock price on grant date (in dollars per share)		$ 51.80
Fair value per performance share award (USD per share)		49.00
Expense per performance share award (in dollars per share)		$ 49.00
Performance Shares with Market Criteria \| February 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining performance period on grant date		2 years 7 months 17 days
Risk-free interest rate (as a percent)		2.14%
Dividend yield (as a percent)		0.00%
Expected volatility (as a percent)		55.01%
Closing stock price on grant date (in dollars per share)		$ 69.80
Fair value per performance share award (USD per share)		79.61
Expense per performance share award (in dollars per share)		$ 79.61
RTSR Factor weight / TSR Modifier (as a percent)		25.00%
ATSR Factor weight (as a percent)		25.00%
Performance Shares with Performance Criteria \| June 3, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date (in dollars per share)		$ 51.80
Fair value per performance share award (USD per share)		$ 51.80
Estimated payout for expense (as a percent)		160.00%
Expense per performance share award (in dollars per share)		$ 82.88
Performance Shares with Performance Criteria \| February 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on grant date (in dollars per share)		69.80
Fair value per performance share award (USD per share)		$ 69.80
Estimated payout for expense (as a percent)		160.00%
Expense per performance share award (in dollars per share)		$ 111.68
ROACE Factor weight (as a percent)		50.00%