Line of Credit Facility, Aggregate Elected Commitment

No definition available.

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Namespace Prefix:	lpi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- 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

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Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section S45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Debt - Narrative (Details) - USD ($)				6 Months Ended
Debt - Narrative (Details) - USD ($)	Mar. 18, 2015	Jan. 23, 2014	Apr. 27, 2012	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Senior Secured Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 2,000,000,000.0
Current borrowing capacity				1,000,000,000
Outstanding amount				105,000,000
Aggregate elected commitment				$ 1,000,000
Credit facility, interest rate at period end (as a percent)				3.13%
Senior Secured Credit Facility \| Line of Credit \| Minimum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.375%
Senior Secured Credit Facility \| Line of Credit \| Maximum
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.50%
Senior Secured Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 20,000,000
Letters of credit outstanding				0		$ 0
Senior Notes \| March 2023 Notes
Debt Instrument [Line Items]
Face amount of debt	$ 350,000,000
Interest rate (as a percent)	6.25%
Senior Notes \| May 2022 Notes
Debt Instrument [Line Items]
Face amount of debt			$ 500,000,000
Interest rate (as a percent)			7.375%
Senior Notes \| January 2022 Notes
Debt Instrument [Line Items]
Face amount of debt		$ 450,000,000
Interest rate (as a percent)		5.625%
Other Assets \| Senior Secured Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Debt issuance costs related to line of credit arrangements				$ 6,700,000	$ 2,700,000
From March 15, 2018 until March 15, 2021 \| Senior Notes \| March 2023 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage	104.688%
On or After March 15, 2021 \| Senior Notes \| March 2023 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage	100.00%
From January 15, 2017 until January 15, 2020 \| Senior Notes \| January 2022 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		104.219%
On or After January 15, 2020 \| Senior Notes \| January 2022 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.00%
From May 1, 2017 until May 1, 2020 \| Senior Notes \| May 2022 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage			103.688%
On and After May 1, 2020 \| Senior Notes \| May 2022 Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage			100.00%