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

FAIR VALUE MEASUREMENTS (Assets and Liabilities Valuation Level) (Details) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Assets:
Contingent consideration arrangement	$ 5,300		$ 5,300
Liabilities:
Contingent consideration, gain (loss) due to change in value	1,200	$ 200	100	$ 3,100
Level 1
Assets:
Derivative Instruments	0		0		$ 0
Contingent consideration arrangement	0		0		0
Total assets	0		0		0
Liabilities:
Derivative Instruments	0		0		0
Level 2
Assets:
Derivative Instruments	3,103		3,103		27,468
Contingent consideration arrangement	0		0		0
Total assets	3,103		3,103		27,468
Liabilities:
Derivative Instruments	833,657		833,657		48,245
Level 3
Assets:
Derivative Instruments	0		0		0
Contingent consideration arrangement	5,300		5,300		6,200
Total assets	5,300		5,300		6,200
Liabilities:
Derivative Instruments	$ 0		$ 0		$ 0