XML 77 R59.htm IDEA: XBRL DOCUMENT
v3.22.0.1

FRESH START ACCOUNTING (Reorganization Adjustment to Liabilities Subject to Compromise and Gain on Liabilities Subject to Compromise) (Details) - USD ($) $ in Thousands | 5 Months Ended |  |
--- | --- | --- | ---
May 17, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | $ 2,224,449 | $ 0 | $ 2,293,480
Reorganization Chapter11 Plan Effect Adjustment General Unsecured Claims settled via Class 4A, 4B, and 5B distributions |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 74,098 |  |
Reorganization Chapter11 Plan Effect Adjustment, Predecessor Senior Notes and associated interest |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 1,842,035 |  |
Reorganization Chapter11 Plan Effect Adjustment, Pre-Petition Revolving Credit Facility |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 197,500 |  |
Reorganization Chapter11 Plan Effect Adjustment Reinstatement of Predecessor Claims as Successor liabilities |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 45,475 |  |
Reorganization Chapter11 Plan Effect Adjustment Reinstatement of Predecessor asset retirement obligations |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | 65,341 |  |
Reorganization Adjustments |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Liabilities subject to compromise | (2,224,449) |  |
Pre-petition General Unsecured Claims Settled at Emergence | 74,098 |  |
Predecessor Senior Notes Claims settled at Emergence | 1,842,035 |  |
Pre-Petition Revolving Credit Facility | 197,500 |  |
Rollover of Pre-Petition Revolving Credit Facility into Exit RBL Facility | (197,500) |  |
Accrued payable for claims to be settled via Unsecured Claims Distribution Trust | (1,000) |  |
Accrued payable for claims to be settled via Convenience Claims Cash Pool | (3,000) |  |
Accrued payable for claims to be settled via Parent Cash Pool | (10,000) |  |
Accrued payable for shares to be transferred to trust | (54,109) |  |
Issuance of New Common Stock to settle Predecessor liabilities | (639,666) |  |
Issuance of Successor Senior Notes in settlement of Class 4B and 5B claims | (550,000) |  |
Gain on settlement of liabilities subject to compromise | $ 658,358 |  |

X
- Definition Gain (Loss) On Settlement Of Liabilities Subject To Compromise + References No definition available. + Details
Name: | gpor_GainLossOnSettlementOfLiabilitiesSubjectToCompromise
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Accrued payable for claims to be settled via Convenience Claims Cash Pool + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseAccruedPayableForClaimsToBeSettledViaConvenienceClaimsCashPool
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Accrued payable for claims to be settled via Parent Cash Pool + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseAccruedPayableForClaimsToBeSettledViaParentCashPool
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Accrued payable for claims to be settled via Unsecured Claims Distribution Trust + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseAccruedPayableForClaimsToBeSettledViaUnsecuredClaimsDistributionTrust
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Accrued payable for shares to be transferred to trust + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseAccruedPayableForSharesToBeTransferredToTrust
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Issuance of New Common Stock to settle Predecessor liabilities + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseIssuanceOfNewCommonStockToSettlePredecessorLiabilities
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Issuance of Successor Senior Notes in settlement of Class 4B and 5B claims + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseIssuanceOfSuccessorSeniorNotesInSettlementOfClass4BAnd5BClaims
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Pre-Petition Revolving Credit Facility + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromisePrePetitionRevolvingCreditFacility
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Predecessor Senior Notes Notes Claims settled at Emergence + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromisePredecessorSeniorNotesNotesClaimsSettledAtEmergence
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Prepetition General Unsecured Claims Settled at Emergence + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromisePrepetitionGeneralUnsecuredClaimsSettledAtEmergence
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Liabilities Subject To Compromise, Rollover of Pre-Petition Revolving Credit Facility into Exit RBL Facility + References No definition available. + Details
Name: | gpor_LiabilitiesSubjectToCompromiseRolloverOfPrePetitionRevolvingCreditFacilityIntoExitRBLFacility
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total amount of liabilities subject to compromise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124433192&loc=d3e56015-112765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=124437977&loc=d3e55717-112764 + Details
Name: | us-gaap_LiabilitiesSubjectToCompromise
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 No definition available. + 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_ReorganizationChapter11PlanEffectAdjustmentGeneralUnsecuredClaimsSettledViaClass4A4BAnd5BDistributionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentPredecessorSeniorNotesAndAssociatedInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentPrePetitionRevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentReinstatementOfPredecessorClaimsAsSuccessorLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=gpor_ReorganizationChapter11PlanEffectAdjustmentReinstatementOfPredecessorAssetRetirementObligationsMember
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: |