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EQT GP Holdings, LP (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jul. 26, 2016 | May 15, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Class of Stock [Line Items] |  |  |  |  |  |
Net proceeds |  |  |  |  | $ 217,102 | $ 696,582
Net income attributable to noncontrolling interests |  |  | $ 77,838 | $ 58,211 | $ 160,627 | $ 105,952
Limited Partner Common |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Limited partner interest (as a percent) |  | 90.10% |  |  |  |
Number of common units retained (in shares) |  | 239,715,000 |  |  |  |
General Partner Common |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Incentive distribution rights distributed in respect of each common unit and general partner unit (in dollars per share) |  |  |  |  | $ 0.5250 |
EQGP |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Percentage of all incremental cash distributed (up to) |  |  | 48.00% |  | 48.00% |
Net proceeds |  | $ 674,000 |  |  |  |
EQGP | Subsequent Event |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Cash distribution declared (in dollars per share) | $ 0.15 |  |  |  |  |
Cash distribution declared | $ 39,900 |  |  |  |  |
EQGP | Limited Partner Common |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Limited partner interest (as a percent) |  | 9.90% |  |  |  |
Underwritten IPO (in shares) |  | 26,450,000 |  |  |  |
Underwriter's discount |  | $ 37,500 |  |  |  |
Structuring fees |  | $ 2,700 |  |  |  |
EQGP | General Partner |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
General partner interest (as a percent) |  |  |  |  | 1.80% |
EQGP | Affiliated Entity | Limited Partner Common |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of common units (in shares) |  |  | 21,811,643 |  | 21,811,643 |
Limited partner interest (as a percent) |  |  |  |  | 26.60% |
EQGP | Affiliated Entity | General Partner |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of general partner units (in shares) |  |  | 1,443,015 |  | 1,443,015 |

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