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

DERIVATIVE INSTRUMENTS (Net (Loss) Gain on Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Net (loss) gain on natural gas, oil and NGL derivatives	$ (53,823)	$ 27,074	$ 71,414	$ 178,169
Natural gas derivatives
Derivative [Line Items]
Net (loss) gain on natural gas, oil and NGL derivatives	(52,648)	11,731	28,894	147,774
Oil derivatives
Derivative [Line Items]
Net (loss) gain on natural gas, oil and NGL derivatives	(782)	12,736	44,155	24,153
NGL derivatives
Derivative [Line Items]
Net (loss) gain on natural gas, oil and NGL derivatives	(393)	3,641	(254)	7,276
Contingent consideration arrangement
Derivative [Line Items]
Net (loss) gain on natural gas, oil and NGL derivatives	$ 0	$ (1,034)	$ (1,381)	$ (1,034)