Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.

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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)