Gulfport Energy Corporation Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Gain and Loss on Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	May 17, 2021	Sep. 30, 2020
Derivative [Line Items]
Net (loss) gain on derivative instruments	$ (622,476)	$ (53,823)	$ (762,134)	$ (137,239)	$ 71,414
Total losses on natural gas derivatives
Derivative [Line Items]
Fair value (losses) gains	(517,799)	(84,390)	(638,063)	(123,080)	(147,661)
Settlement (losses) gains	(82,566)	31,742	(89,255)	(3,362)	176,555
Net (loss) gain on derivative instruments	(600,365)	(52,648)	(727,318)	(126,442)	28,894
Total losses on oil and condensate derivatives
Derivative [Line Items]
Fair value (losses) gains	(1,590)	723	(6,947)	(6,126)	(4,289)
Settlement (losses) gains	(4,336)	(1,505)	(4,336)	0	48,444
Net (loss) gain on derivative instruments	(5,926)	(782)	(11,283)	(6,126)	44,155
Total losses on NGL derivatives
Derivative [Line Items]
Fair value (losses) gains	(10,201)	(288)	(17,549)	(4,671)	(620)
Settlement (losses) gains	(5,984)	(105)	(5,984)	0	366
Net (loss) gain on derivative instruments	$ (16,185)	$ (393)	(23,533)	(4,671)	(254)
Contingent consideration arrangement - fair value losses
Derivative [Line Items]
Net (loss) gain on derivative instruments			$ 0	$ 0	$ (1,381)