XML 45 R33.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments and Contingencies (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Long-term Purchase Commitment [Line Items] |
Schedule of Future Minimum Lease Commitments | Future minimum lease commitments under these leases at March 31, 2018 were as follows:
|  | (In thousands)
Remaining 2018 |  | $ | 80 |
2019 |  | 54 |
Total |  | $ | 134 |
Schedule of Firm Transportation Commitments | The table below presents these commitments at March 31, 2018 as follows:
|  | (MMBtu per day)
Remaining 2018 |  | 552,000 |
2019 |  | 659,000 |
2020 |  | 526,000 |
2021 |  | 372,000 |
2022 |  | 272,000 |
Thereafter |  | 240,000 |
Total |  | 2,621,000 |
Transportation commitment |
Long-term Purchase Commitment [Line Items] |
Schedule of Other Commitments | The table below presents these commitments at March 31, 2018 as follows:
|  | (In thousands)
Remaining 2018 |  | $ | 186,036 |
2019 |  | 251,644 |
2020 |  | 247,581 |
2021 |  | 246,620 |
2022 |  | 246,620 |
Thereafter |  | 2,511,853 |
Total |  | $ | 3,690,354 |

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_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about obligations resulting from other commitments. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=gpor_TransportationCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |