XML 79 R58.htm IDEA: XBRL DOCUMENT
v3.24.0.1

FRESH START ACCOUNTING - Reorganization Adjustment to Long-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | May 17, 2021
--- | --- | --- | ---
Reorganization, Chapter 11 [Line Items] |  |  |
Current maturities of long-term debt | $ 0 | $ 0 | $ 60,000
Long-term debt | $ 667,382 | $ 694,155 | 792,751
Reorganization Chapter11 Plan Effect Adjustment, Current Portion Of Term Notes Issued Under The Exit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Current maturities of long-term debt |  |  | 60,000
Reorganization Chapter11 Plan Effect Adjustment, Payment Of DIP Facility To Effectuate Exit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Current maturities of long-term debt |  |  | (157,500)
Reorganization Chapter11 Plan Effect Adjustment, Transfer Of Post-Petition RBL Borrowings To Exit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Current maturities of long-term debt |  |  | (122,751)
Reorganization Adjustments |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Current maturities of long-term debt |  |  | (220,251)
Long-term debt |  |  | 792,751
Reorganization Chapter11 Plan Effect Adjustment Emergence date draw on Exit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Long-term debt |  |  | 122,751
Reorganization Chapter11 Plan Effect Adjustment Noncurrent portion of First-Out Term Notes issued under the Exit Credit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Long-term debt |  |  | 120,000
Reorganization Chapter11 Plan Effect Adjustment Issuance of Successor Senior Notes |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Long-term debt |  |  | $ 550,000

X
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481435/852-10-45-14 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481404/852-10-50-7 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 + Details
Name: | us-gaap_ReorganizationChapter11LineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentCurrentPortionOfTermNotesIssuedUnderTheExitFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentPaymentOfDIPFacilityToEffectuateExitFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentTransferOfPostPetitionRBLBorrowingsToExitFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=us-gaap_ReorganizationChapter11PlanEffectAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentEmergenceDateDrawOnExitFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentNoncurrentPortionOfFirstOutTermNotesIssuedUnderTheExitCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentIssuanceOfSuccessorSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |