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FRESH START ACCOUNTING (Reorganization Adjustment to Common Stock, Additional Paid in Capital and Common Stock Held in Reserve) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | May 17, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock | $ 2 | $ 2 | $ 1,607
Additional paid-in capital | 693,921 | 693,774 | $ 4,213,752
New Common Stock held in reserve | $ (30,216) | (54,109) |
Issuance of common stock to settle General Unsecured Claims against Gulfport Parent |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock |  | 0 |
Additional paid-in capital |  | 27,751 |
Issuance of common stock to settle General Unsecured Claims against Gulfport Subsidiaries |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock |  | 2 |
Additional paid-in capital |  | 666,022 |
Common stock reserved for settlement of claims post Emergence Date (par value) |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock |  | 0 |
Net change to New Common Stock |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock |  | 2 |
Extinguishment of Predecessor stock based compensation |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Additional paid-in capital |  | 4,419 |
Extinguishment of Predecessor paid in capital |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Additional paid-in capital |  | (4,220,256) |
Shares held in reserve to settle Allowed Claims against Gulfport Parent |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
New Common Stock held in reserve |  | (23,894) |
Shares held in reserve to settle Allowed Claims against Gulfport Subsidiary |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
New Common Stock held in reserve |  | (30,215) |
Reorganization Adjustments |  |  |
Reorganization, Chapter 11 [Line Items] |  |  |
Common stock |  | (1,609) |
Additional paid-in capital |  | (3,522,064) |
New Common Stock held in reserve |  | $ (54,109) |

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