XML 30 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Equity Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2013
Equity Method Investments and Joint Ventures [Abstract] |
Investments Accounted For By The Equity Method | Investments accounted for by the equity method consist of the following as of December 31, 2013 and 2012:
|  |  | Carrying Value |  | (Income) loss from equity method investments
| Approximate Ownership % |  | December 31, |  | For the Year Ended December 31,
|  | 2013 |  | 2012 |  | 2013 | 2012 | 2011
|  |  | (In thousands)
Investment in Tatex Thailand II, LLC | 23.5 | % |  | $ | — |  |  | $ | 203 |  |  | $ | (343 | ) | $ | 7 |  | $ | 7 |
Investment in Tatex Thailand III, LLC | 17.9 | % |  | 10,774 |  |  | 8,657 |  |  | 254 |  | 251 |  | 172 |
Investment in Grizzly Oil Sands ULC | 24.9999 | % |  | 191,473 |  |  | 172,766 |  |  | 2,999 |  | 1,512 |  | 1,592 |
Investment in Bison Drilling and Field Services LLC | 40.0 | % |  | 12,318 |  |  | 13,518 |  |  | 3,533 |  | 373 |  | (357 | )
Investment in Muskie Proppant LLC | 25.0 | % |  | 7,544 |  |  | 7,320 |  |  | 1,975 |  | 1,031 |  | 4 |
Investment in Timber Wolf Terminals LLC | 50.0 | % |  | 1,001 |  |  | 878 |  |  | (6 | ) | 122 |  | — |
Investment in Windsor Midstream LLC | 22.5 | % |  | 10,632 |  |  | 9,503 |  |  | (1,125 | ) | (663 | ) | — |
Investment in Stingray Pressure Pumping LLC | 50.0 | % |  | 19,624 |  |  | 13,265 |  |  | (818 | ) | 1,235 |  | — |
Investment in Stingray Cementing LLC | 50.0 | % |  | 3,291 |  |  | 3,110 |  |  | 93 |  | 159 |  | — |
Investment in Blackhawk Midstream LLC | 50.0 | % |  | — |  |  | — |  |  | 673 |  | 436 |  | — |
Investment in Stingray Logistics LLC | 50.0 | % |  | 903 |  |  | 947 |  |  | 51 |  | 36 |  | — |
Investment in Diamondback Energy, Inc. | 7.2 | % |  | 178,708 |  |  | 151,317 |  |  | (220,129 | ) | (12,821 | ) | — |
Investment in Stingray Energy Services LLC | 50.0 | % |  | 3,800 |  |  | — |  |  | (215 | ) | — |  | — |
|  |  | $ | 440,068 |  |  | $ | 381,484 |  |  | $ | (213,058 | ) | $ | (8,322 | ) | $ | 1,418 |
Equity Method Investment Balance Sheet Summary | Summarized balance sheet information:
| December 31,
| 2013 |  | 2012
| (In thousands)
Current assets | $ | 84,107 |  |  | $ | 68,459 |
Noncurrent assets | $ | 1,107,579 |  |  | $ | 887,884 |
Current liabilities | $ | 112,406 |  |  | $ | 74,308 |
Noncurrent liabilities | $ | 110,095 |  |  | $ | 23,521 |
Equity Method Investment Income Statement Summary | Summarized results of operations:
| December 31,
| 2013 |  | 2012 |  | 2011
| (In thousands)
Gross revenue | $ | 162,401 |  |  | $ | 39,918 |  |  | $ | 16,955 |
Net loss | $ | 17,350 |  |  | $ | 1,943 |  |  | $ | 6,375 |

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
- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration