XML 27 R26.htm IDEA: XBRL DOCUMENT
v3.19.3

EQUITY INVESMENTS (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of equity method investments | Investments accounted for by the equity method consist of the following as of September 30, 2019 and December 31, 2018:
|  |  | Carrying value |  | Loss (income) from equity method investments
| Approximate ownership % |  | September 30, 2019 |  | December 31, 2018 |  | Three months ended September 30, |  | Nine months ended September 30,
|  |  |  | 2019 |  | 2018 |  | 2019 |  | 2018
|  |  | (In thousands)
Investment in Tatex Thailand II, LLC | 23.5 | % |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (137 | ) |  | $ | (2,085 | ) |  | $ | (241 | )
Investment in Grizzly Oil Sands ULC | 24.9999 | % |  | 49,546 |  |  | 44,259 |  |  | 41 |  |  | 275 |  |  | 380 |  |  | 833 |
Investment in Timber Wolf Terminals LLC(1) | — | % |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 536 |
Investment in Windsor Midstream LLC | 22.5 | % |  | 39 |  |  | 39 |  |  | — |  |  | — |  |  | — |  |  | (9 | )
Investment in Mammoth Energy Services, Inc. | 21.8 | % |  | 24,377 |  |  | 191,823 |  |  | 43,041 |  |  | (12,996 | ) |  | 166,096 |  |  | (35,708 | )
Investment in Strike Force Midstream LLC(2) | — | % |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (693 | )
|  |  | $ | 73,962 |  |  | $ | 236,121 |  |  | $ | 43,082 |  |  | $ | (12,858 | ) |  | $ | 164,391 |  |  | $ | (35,282 | )
(1) | On June 5, 2018, the Company received its final distribution from Timber Wolf Terminals LLC ("Timber Wolf"). See below under Timber Wolf Terminals LLC for information regarding the subsequent dissolution of Timber Wolf.
(2) | On May 1, 2018, the Company sold its 25% interest in Strike Force Midstream LLC ("Strike Force") to EQT Midstream Partners, LP. See below under Strike Force Midstream LLC for information regarding this transaction.
Schedule of equity investments - balance sheet | The tables below summarize financial information for the Company’s equity investments as of September 30, 2019 and December 31, 2018. Summarized balance sheet information:
| September 30, 2019 |  | December 31, 2018
| (In thousands)
Current assets | $ | 427,643 |  |  | $ | 471,733 |
Noncurrent assets | $ | 1,309,729 |  |  | $ | 1,302,488 |
Current liabilities | $ | 130,465 |  |  | $ | 239,975 |
Noncurrent liabilities | $ | 176,145 |  |  | $ | 94,575 |
Schedule of equity investments - income statement | Summarized results of operations:
| Three months ended September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands)
Gross revenue | $ | 113,417 |  |  | $ | 384,043 |  |  | $ | 557,375 |  |  | $ | 1,451,580 |
Net (loss) income | $ | (35,730 | ) |  | $ | 68,414 |  |  | $ | (15,046 | ) |  | $ | 181,884 |

X
- Definition Schedule Of Equity Method Investments, Balance Sheet Disclosures [Table Text Block] + References No definition available. + Details
Name: | gpor_ScheduleOfEquityMethodInvestmentsBalanceSheetDisclosuresTableTextBlock
Namespace Prefix: | gpor_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Equity Method Investments, Income Statement Disclosures [Table Text Block] + References No definition available. + Details
Name: | gpor_ScheduleOfEquityMethodInvestmentsIncomeStatementDisclosuresTableTextBlock
Namespace Prefix: | gpor_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration